1 statement package EX 1a

Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) CONSTRUCTION METHOD STATEMENT HANOI - HAI PHONG EXPRESSWAY PROJECT Package EX-1A: Km0-042 ÷ Km1+065.74 CONTENTS PART I - GENERAL SCHEDULE I Bidder’s familiarity and understanding of construction site of the Project and Package II Electric, water and fuel supply plan III Major sources of material supply IV Major sources of workmen supply V Traffic organization and temporary traffic control Organization chart for traffic control of Contractor Traffic control method VI Project safety and security plan Safety Control Plan 1.1 Contractor’s organization chart 1.2 Safety insurance methods Security Control Plan VII Quality control plan Contractor’s quality control 1.1 Quality control organization chart 1.2 Duties of departments and divisions 1.2.1 Quality control manager 1.2.2 Technical department 1.2.3 Laboratory for quality control 1.2.4 Duty of construction teams 1.3 Content of Quality Control Plan 1.4 Coordination of quality control with the Employer 1.5 Quality control document Tests and testing methods 2.1 Testing procedures 2.2 Laboratory 2.2.1 Personnel for laboratory 2.2.2 Basic tests 2.2.3 Test report 2.2.4 Material testing frequency VIII Environment management plan Page - Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) Contractor’s organization 1.1 Contractor’s Organization Chart 1.2 Duty of charge-in staffs 1.3 Duty of environment staffs of construction teams: Environment Protection Measures 2.1 Air 2.2 Water 2.3 Noise 2.4 Waste 2.5 Dangerous goods and chemical 2.6 Ecological resources, and valued sources of archaeology and history 2.7 Procedures in emergency case on environment 2.8 Site layout PART II - CONSTRUCTION METHOD A General construction method I Construction site layout II Scope of works III Technical method IV General construction method Site layout Construction layout Construction sequences B Detail construction method of work items I Bridge construction method General introduction 1.1 For Ramp-A bridge 1.2 For Ramp-B bridge 1.3 For Gia Lam bridge 1.4 For Ramp-E bridge Arrangement of construction units for Bridge Site arrangement 3.1 Site of Ramp-A bridge 3.2 Site of Ramp-B bridge 3.3 Site of Gia Lam bridge 3.4 Site of Ramp-E bridge Main construction method for Bridge 4.1 For Ramp-A bridge 4.2 For Ramp-B bridge 4.3 For Gia Lam bridge Page - Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) 4.4 For Ramp-E bridge Construction method of substructure (abutments, piers) 5.1 Construction method of abutment on land, using foundation pit without cofferdam 5.2 Construction method of abutment on land, using foundation pit with steel sheet pile cofferdam 5.3 Construction method of pier on land, using foundation pit without cofferdam 5.4 Construction method of pier on land, using foundation pit with steel sheet pile cofferdam Construction method of superstructure 6.1 For Ramp-A bridge 6.2 For Ramp-B bridge 6.3 For Gia Lam bridge 6.4 For Ramp-E bridge General construction works 7.1 Construction work for concrete and reinforcement concrete 7.2 Construction works of bored pile on land 7.3 Casting pre-stressed PCI girder, l=33m 7.4 Construction work of cast-in-place hollow girder on scaffold II Road construction Preparation work Method of embankment construction 2.1 Requirement for material 2.2 Requirements for construction equipment and labor 2.3 Common excavation and unsuitable excavation 2.4 Embankment Construction Method 2.5 Soft soil improvement 2.5.1 The embankment treated by PVD 2.5.2 The embankment treated by vertical sand drains D=40cm 2.5.3.The embankment treated by compacting vertical sand drains D=70cm Drainage system 3.1 Requirements for material 3.2 Requirement for construction plant, equipment and labor 3.3 Construction of pipe culvert 3.4 Construction of box culvert by cast in place method 3.5 Construction of underpass by cast in place method Sub-base and Base 4.1 Requirements for material 4.2 Requirements for construction plant, equipment and labor Page - Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) 4.3 Construction of base course Asphalt construction pavement 5.1 Requirements for material 5.2 Requirements for equipment and labor 5.3 Construction sequence of asphalt concrete 5.4 Prime coat and tack coat 5.5 Asphalt Treatment Base course at 12cm thickness 5.6 AC binder course at 14cm thickness 5.7 AC surface course at 5cm thickness 5.8 Rough Asphalt course at 3cm thickness 5.9 Double bituminous surface treatment (DBST) 5.9.1 Requirements for material 5.9.2 Requirements for plant, equipment and labor 5.9.3 Construction Construction method of retaining wall 6.1 Out line 6.2 Construction procedure 6.3 Main equipment and machine Construction method of retaining wall 6.4.1 Driving RC pile 6.4.2 Driven Steel sheet pile for foundation pit (if any) 6.4.3 Structure Excavation 6.4.4 Lean concrete 6.4.5 Footing concrete 6.4.6 Backfill excavation area 6.4.7 Wall concrete 6.4.8 Embakment and compact Construction method of R.C pile for Underpass of R.R III Special method of approach road construction PART III - PROPOSED SITE ORGANIZATION: A - Site Oraganization Chart: B - Narative description of Site Oranization Chart Project Manager Deputy Project Manager The Technical Department The Planning + Material Department The Administration - Finance Department Laboratory - Quality control Traffic control - Environment protection - Safety Page - Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) Construction Teams PART I - GENERAL SCHEDULE I Bidder’s familiarity and understanding of construction site: - Hanoi - Hai Phong Expressway Project has length of 105,5km + Start point at km0+000 lied on Third Ring Road of Hanoi City, 1.025m away from abutment of Thanh Tri bridge, 1.420m away from Duong river dike on Bac Ninh side, under Thuong Hoi village - Thach Ban ward - Long Bien district, Hanoi City + End point at km105+500, Dinh Vu Dam, Hai An district, Hai Phong City - The alignment run across provinces/cities: Hanoi City, Hung Yen Province, Hai Duong Province, Hai Phong City The topography of the area crossed by the Project is predominantly paddy fields, ponds and natural river system and local irrigation channels The topography is relatively flat, due to lying on delta area, has not great difference in height and has tendency of gradually sloping to the East - Package EX-1A under Hainoi - Haiphong Expressway Project has total length of 1.485km under Thach Ban and Cu Khoi wards, Long Bien district, and Trau Quy Town, Gia Lam distrist of Ha Noi city - The alignment primarily crosses paddy fields, ponds and system along with local irrigation channels - Before commencement of the Package EX-1A, Owner has carrier out the Package has completed its 1st stage (removal of organic soil and backfilling), thus access roads for construction of phase were available The contractor will re-use and maintain local access roads for construction of Package EX-1A - The contractor arranges construction site as follows: + Expectation, Project Management Board shall be located at nearly site + Concrete structures casting yard, camp for workers are located near by the construction area of bridges in Intersection + 01 asphalt concrete plant 120T/h are arranged at the area of Song Hong dyke nearly Thanh Tri bridge + 02 cement concrete plants 60m3/h are set at intersection Ring Road III, Ramp-A and Ramp-B bridge + External roads for transporting materials, the contractor will use existing road as roadway No.195 (Song Hong dyke), Ring road III, National road No.5… + Internal roads for transporting materials, the contractor will use the existing internal access roads of the phase (removal of organic soil and backfilling) - After studying carefully Bidding Document and detailed investigation of actual site conditions, it is found that: - Technical: - Some un-complex technologies are applied to the package such as: soft soil treatment by PVDs, compaction sand drain D=0.7m, sand drain D=0.4m, PCI girder, bored pile 1.2m and 1.5m, cast-in-situ pre-stressed hollow slab girder… - Construction Schedule: - The execution time is 30 months, but required traffic openning before 31/12/2014, which requires the Contractor shall be in ready manner, his mobilization labor and equipment Page - Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) will be executed as short as possible The Contractor has powerful reserved labor force enough to further mobilize as necessary to speed up the progress - Construction conditions: - Construction conditions are relatively favorable, phase including removal of organic soil and backfilling has been completed, so access roads inside were available on the alignment, so the Contractor can deploy many construction sites at the same time - The supply of materials for package is favorable, because sand borrow pits are not so much far The traffic in and out the package area is favorable - With advanced technology and technical capacity, fresh and profuse finance, as professional construction company, our Contractor firmly believes that we will excellently fulfill package EX-1A in accordance with the required schedule, good quality and high aesthetics II Electric, water and fuel supply plan: - Power sourse: - The contractor will contact with Ha Noi electric to buy power from low-voltage stations which are available nearby the site or the contractor will build new low-voltage station to service for construction site and living - Besides, to take initiative in electric source, the contractor will reserve generators in case of public power cut - Water source for construction works and living: - The contractor will buy from the water supply factories under the area of HaNoi and use drilled well at site and water will be processed freshly - Fuel source for construction: - The contractor will take initiative to buy at petrol stations nearby the construction site or the prestigious suppliers on the market such as Petrolimex The contractor has fuel reserve method by tank III Major sources of material supply: - Black sand (fine sand): - Fine sand is bought at the supply Song Hong dyke eares nearly Thanh Tri bridge, transported by truck to the site - Stone material: - Stone material will be taken from the following quarries: Stone for concrete, asphalt concrete, crushed stone: taken from Phu Ly quarry, Ha Nam, and transported by waterway to dyke of Thanh Tri bridge and then by truck to the site - Yellow sand (coarse sand): - Coarse sand for asphalt concrete, cement concrete, sand blanket, sand drain: use sand taken from Lo river, bought at Viet Tri and stockpiled dyke of Thanh Tri bridge and then transported by truck to the site - Soil for embankment: - Taken from Thai Dao borrow pit under Lang Giang district, Bac Giang province, transported by trick to the site - Bitumen: - Dense bitumen with 60/70 pen Is bought from Hai Phong city, and shall be transported by truck to the site Page - Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Steel bar: - Use Viet-Australia steel, Viet-Han steel, Viet-Japan steel or Thai Nguyen steel after having approved by the Employer The steel material is supplied at Ha Noi city - Cement: - The cement will be bought at Hanoi city and transported by truck to the site - Geo-textile, PVDs, pre-stressed cable, bearing pad, expansion joints: - Shall be imported - Asphalt concrete: - The contractor locates 01 plants at the area of Song Hong dyke aeres nearly Thanh Tri bridge and then transported by truck to the site - Cement concrete: - The contractor locates 02 concrete plants at Ramp-A and Ramp-B bridges eares - Corrugated guardrail and other materials: - The Contractor shall be bought from the suppliers in Hanoi city - Water for concrete: - Use water source from drilled well at site and processed freshly - Pre-stressed cable, bearing, expansion-joint: - The Contractor will be imported meeting technical specifications of the package IV Major sources of workmen supply: - The contractor has main labor available and use labor source form subcontractors Labors are trained at technical schools and have professional skill of 4/7 level at average V Traffic organization and temporary traffic control: - The Contractor is aware of that: Traffic Control of the Project during the construction period is obligatory The well-solving of the above issues will assist construction work be convenient, because if traffic jam is occurred, construction works will be greatly affected, even must be stopped and accident easily happen Organization chart for traffic control of Contractor: - The organization chart will be as follows: The Employer, local people’s committee, police, relevant authorities Project Manager Traffic control, labor safety and environment hygiene group of Project Management Board Traffic control, labor safety and environment hygiene staff of construction companies - Project Manager: Be fully responsible for construction works of the package including traffic control during construction period, working with the Employer and relevant authorities about traffic control Page - Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Traffic Control, traffic safety group: consists of Chief and staffs under Project Manager Board, has duties as follows: + Setting up Safety and traffic control plan to submit to the Employer for the approval + Executing Safety and traffic control at Site + Supervising and instructing traffic control and safety staff of construction teams at site + Participating in meetings, preparing periodical and urgent reports for Safety and Traffic Control to Project Manager - Traffic control staff of construction teams: Each construction team shall assign a traffic control staff This staff is under management of Department for environment, safety, traffic of Project Manager Board, shall be responsible for executing the Environment, Safety and Traffic Control within his construction area Traffic control method - Using Provincial and National roads are available to transport materials, machinery for Project construction The contractor will regularly maintain internal access roads and local roads to ensure safety for passage of traffic means - The contractor will arrange guide signs for traffic means at turning points from existing local roads to access roads - The Contractor will work with Road Management Authority to have traffic control measure at intersections between Ring road and main alignment, Road No 195 and construction road of project - With the above characteristic of project during Contractor’s construction period, we undertake always ensure the following requests: + Prior to the start of construction, the Contractor shall generously announce on the mass mean, setting post at some necessary locations + At the areas where construction will be executed, chart of construction force arrangement shall be available: labor, equipment and machinery suitable with construction land, assigning guide man to guide transport means and vehicles during construction + Transport means shall ensure not only environment hygiene but also run to the right route and strictly comply with traffic regulations + Daily inspections will be regularly carried out by traffic guide-man to resolve concrete works to ensure smooth traffic, normal passage of resident within the project area - The contractor will strictly comply with the following concrete measures to avoid traffic jam during construction of the Package: + Project Management Board prepares traffic insurance plan to submit the Employer for the approval, closely coordinate with Traffic Police and relevant authorities + Before construction, the contractor will separate traffic lanes for sections where crossing the package area The contractor will install guide signs, profile markings at both ends of the construction area Assign a person to guide traffic 24/24 hour to ensure traffic safety at the project area Page - Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) + The contractor strictly complies with industrial hygiene at site: the area for construction separated by fence The excavation and filling works are orderly and tidy executed Cargo trucks of the Contractor when traveled and operated should not prevent public traffic VI Project safety and security plan Safety control plan 1.1 Contractor’s organization chart: Head Office Project Manager Safety and Security Staff Safety and security staff of road construction teams Safety and security staff of bridge construction teams Safety and security staff of drainage and other teams * Safety and Security staff of Project Management Board (PMB): Safety and security staff of Project Management Board shall be a person who has a sufficient knowledge on law, State procedures, documents on safety and security and shall be responsible to: - Set up plan and methods for securing labor safety, safety for equipment, explosion/fire prevention and safety for the works to submit to the Employer, to compile regulations on safety of the site - Guide safety and security staff of construction teams - Collects information, supervise safety issues of the whole package, record daily site diary on safety and security, report to Contractor’s Project Manager at a regular basis - Work with, on behalf of Project Management Board, State authorities, local people and government and other relevant authorities on the safety and security of the package, always contact with the Employer 1.2 Safety insurance methods - Safety and security staff of Project Management Board set up plan and method for ensuring labor safety, safety for equipment, explosion/fire prevention etc to submit the Employer for the approval - Safety and security staff of Project Management Board composes regulations on safety on site and organizes training courses on safety for all staffs and workers on site for their serious fulfillment - Safety and security staff of Project Management Board and of construction teams strictly fulfill the regulations on labor safety issued by the State: sufficiently equip labor safety equipment for workers such as globe, hard-hat, boots, protective clothing The welder shall be equipped with eye protectors, mask, the driller shall be provided with dustproof glasses and mask The workers when work at altitude shall be Page - Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) provided with safety belt, the electric man shall have rubber insulation gloves etc All workers, during construction shall use protective equipment provided - Provide lighting for construction works at nighttime with sufficient lighting - The safety staff shall regularly be present at site, especially at danger area to timely remind, correct worker’s behaviors violating the regulations on labor safety If it is found that the safety is not ensured, safety staff is entitled to temporarily suspend the work so that construction team can supplement safety assurance method to report to Project Manager - At site area, the Contractor outlines slogan, draw poster to propagandize and remind on the safety at work - The safety staffs are provided with flag, horn, loudspeaker, red ribbon etc during the execution of their duties - For construction equipment, prior to construction, it is necessary to check equipment’s operation and carry out trial run The equipment, before being used shall be verified and shall get the verification certificate from the authorized agency The equipment and machine shall be maintained at a periodical basis in accordance with the specified regime The Contractor commits to sufficiently provide safety devices for own equipment and machine - For explosion/fire prevention work at fuel storehouses, wooden-made workshops and other inflammable areas, the Contractor will provide firefighting device, outlines slogan to remind workers on the safety assurance, install firefighting order sign etc - On site, arrange clear and convenient passing road so that firefighting car can move and timely firefight when occurrence is happened - Electric line will be checked at a regular basis to avoid electric leakage, fire - In order to prevent storm, flood, the Contractor assigns a person who is charge of closely observing information of weather in rainy season on mass communications such as radio, newspaper, television etc., prepare ready area to evacuate material, equipment and human from the flood stricken area when the occurrence is happened - The Contractor organizes a first-aid force on site and signs a contract with local medical units under Ha Noi city to get ready to give emergency-aid and treatment when accident at work is happened Security Control Plan: The Security Control Measures of Contractor includes: - Closely associate with police and local government as to security and social safety The Contractor shall execute strictly regulations of local government within the project area and regularly attend meetings with Project Manager, safety staff and the local government - Making public relations well, creating healthy atmosphere, struggle against all negative manifestations, social evils at local The Contractor makes priority for local popular labor so that can resolve a small part of local labor problem, creating relationship between the Contractor and the local government - The site area of the Contractor has been arranged far from the residential area, have guard barrier, protect and be on guard 24/24 hours The site area shall be provided with lighting to guard at nighttime Storages and stockpile areas of the Contractor are fenced VII Quality control plan Page - 10 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) Contractor’s quality control consists of establishment of personnel machinery, quality control plan for all works in suitability with construction schedule, insurance of well-performance of quality of all items in accordance with the technical requirements, a test program including site laboratory, personnel, equipment for testing work according to the agreed format form between the Employer and Contractor Contractor’s quality control 1.1 Quality control organization chart Head office Project Manager Technical Department Road construction team: Team leader Quality staff/technician Quality Manager Laboratory for quality control Bridge construction team: Team leader Quality staff/technician Other construction team: Team leader Quality staff/technician 1.2 Duties of departments and divisions: 1.2.1 Quality control manager Quality control manager has the following authorities: - Manage all quality control organization and be entitled to solve all matters on quality control of all project items - Be responsible before the leader of the company in respect of quality control - Suspend all activities and reject all works of construction team that fail to ensure the technical requirements in comparison with Contract document - Replace staffs, workers under him who are not capable of completing the work and not comply with the requests made by the Employer - Work with the Employer on the quality of the Works 1.2.2 Technical department - To design construction organization methods pursuant to the quality control plan to ensure that the items are constructed with the best quality - To closely coordinate with all divisions to supervise construction teams to secure that the items are constructed in comply with the required quality 1.2.3 Laboratory for quality control - Perform all tests, record and report tests results according to the request made by the Employer in comply with timetable as specified in the Quality Control Plan - Under direct management of Project Manager - The head and staffs shall have enough professional ability and number of staff shall meet requirements of construction schedule Page - 11 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Sufficiently furnish equipment, tools for testing work ensuring test standards in accordance with the Contract - The head and every staff shall be much-experienced Employers in construction works - Prepare a detailed plan to submit Project Manager and Quality Manager for their review before submitting to the Employer for their approval on Quality Control Plan agreeably to the construction schedule - Supervise construction teams to rightly execute the works in accordance with the quality requirements 1.2.4 Duty of construction teams: - Rightly fulfill instruction documents on quality control for construction items - Closely coordinate with Lab to carry out construction works in accordance with the schedule - Comply with the requirements in the technical specifications for construction of work-items 1.3 Content of Quality Control Plan: - Prior to construction, Contractor sets up Quality Control Plan to submit the Employer for their approval with the following content: - Establish a timetable plan, review, certify, manage all submissions including of the Subcontractor, the manufacturer at site, the supplier and business agents - Check, ascertain and accept testing procedure for each detailed test including: + Name of tests, section of technical specifications needs for test + The character of the work to be tested, testing frequency + The person who is responsible for each test - Submit the Employer the following contents for their approval: + Equipment for laboratory + Content of test, approval of test and document + Adjust construction shortcomings through the approved test + Procedures of report, form of report and format form of quality control books, propose a test sample and form of report 1.4 Coordination of quality control with the Employer: - Prior to construction, the Contractor sets up a Quality Control Plan to submit the Employer for their approval Project Manager and Quality Control Manager shall have a meeting with the Employer to discuss on Contractor’s quality control system to agree between two parties the following contents: + Form of recording book in office and at site + Reciprocal relationship between the management and inspection of the Contractor and the requests made by the Employer on quality insurance - Meetings will be hold, if necessary as proposed by the Contractor or by the Employer to revise errors in the quality control After each meeting, minutes shall be prepared with the endorsement of the Employer and Contractor 1.5 Quality control document: Page - 12 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Records on quality control works, tests and works of the subcontractor and the supplier shall be kept These records shall be daily report form approved by the Employer The records shall clearly show the work or test required according to the following contents: - Daily works done, clearly show location, description and who is in charge of Type and number of relative tests tested - The results of the work or test - Errors recorded along with the proposed repair or proposed - Relative sections in the technical specifications to compare Tests and testing methods 2.1 Testing procedures: - The contractor carries out tests as specified or required to appraise the testing methods agreeably to the technical requirements to provide the product in accordance with the quality requirement of the Contract - Provide services of laboratory at site as approved by the Employer - List tests to be done, show name of tests, frequency and relative section in the Technical specifications for test, test requirements, personnel and entrustment of the work to each person + Project Manager approves the following works: + Testing procedures agreeably to the contract + Equipment shall satisfy the contract requirements + Check data and ascertain test tools + Record forms for tests - Take results of all tests, achieved and unachieved results are all recorded pursuant to the date of taking sample, number of order to submit the Employer 2.2 Laboratory 2.2.1 Personnel for laboratory: - The chief of laboratory for quality control - Reporting staff - Soil testing staff - Material testing staff - Concrete and steel testing staff 2.2.2 Basic tests: - Tests for earthworks: + Compaction + CBR + Specific gravity + Plasticity index + Gradation Page - 13 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) + Density in place + Moisture + Abrasion (base aggregate) + PCPT test + Standard penetration test + Unlimited Compression Test - Tests for pavement: + Soundness + Specific gravity of coarse aggregate + Specific gravity of fine aggregate + Air voids + Bored cores - Tests for concrete: + Cleanliness of sand, stone and water + Gradation according consecutive grading, abrasion of stone + Concrete mix + Coarse aggregate + Concrete slump + Concrete strength + Steel testing 2.2.3 Test report - The Contractor is responsible to prepare a test report to submit the Consultant for their review and approval according to the deadline as shown in the Quality Control Plan - Each test will be prepared into copies, copies to the Employer, 01 copy for Contractor’s file within days after each test is completed 2.2.4 Material testing frequency General requirements - The Contractor will comply with all requirements stated in the General Conditions of Contract and the Specifications concerning the testing frequency Material for road - The testing frequency of road materials, beyond what as required by the Employer, the Contractor will perform in compliance with the followings: Table: Testing frequency for road materials Page - 14 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) Material (a)Borrow material Tests Min frequency 2.2 Sieve analysis 2.3 Natural moisture 2.4 Liquid limit 2.5 Plastic limit 2.6 Plasticity index 2.7 Max dry density (γ cmax) 2.8 Optimum moisture (Wo) 2.9 Inside friction angle 2.10 Adhesion 2.11 Plastic module or bearing At borrow pits: set/10.000m3 Or 01 set/borrow pit (whichever greater) At filling area (site): set/1.000m3 coefficient CBR (b) Sand material 2.12 2.13 Organic content 2.14 (c)Geotextile, PVDs (d) Material for subbase/ base Sieve analysis set / 500m3 Permeability coefficient 2.15 Characters and indices as specified set /10.000m2 or set /lot of material (whichever greater) in Technical Specifications 2.16 Sieve analysis 2.17 Flat particle rate 2.18 Plasticity index 2.19 Clay content 2.20 Moisture 2.21 Compaction set/150m3 or set /lot of material (whichever greater) 2.21.2 Crushed stone: Sieve analysis, Flat set/5 working days or 01 set/material input (whichever greater) particle rate, Clay dust content, other tests 2.21.3 Sand: Sieve analysis; Grain size set/5 working days or 01 set/material input (whichever greater) module; Clay dust content (e) Material for pavement 2.21.4 Mineral filler: testing characters and indices as necessary all 2.21.5 Bitumen: testing all characters set/3 working days or 01 set/material input (whichever greater) and indices as necessary and penetration at 250C 01 set/material input 2.21.6 Mixing ratio set/working day or before each mixing batch Material for concrete - Testing work for concrete will be as decided by the Employer and no less than the specified frequency in the following table: Page - 15 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) Table: Testing frequency for concrete material Materials (a) Fine aggregate (b) Coarse aggregates (c) Re bar Test - Minimum frequency Sieve analysis - Test for materials finer than set/quarry 0,075mm - Physio-mechanical properties Tensile tests (>60cm bending test (>40cm) set/quarry or wherever requested by Engineer sample) set/diameter/let imported at site or 1/set/individual structure (whichever greater) extra test may be requested by Engineer or Employer (d) Cement All necessary characteristics properties and 1set/lot or requested by the Manufacture specification (greater) (e) Admixture All necessary characteristics properties and 1set/product or wherever requested by Engineer (f) Tendon Tensile strength, yield strength, elongation 1set/20tons Demonstration of manufacturer certificates and tests requested For each product/member (g) Other materials * Note: - 01 set = samples - Object of taking specimen: 01 lot, 01 product, 01 borrow pit, 20T, 500m 3, etc.) 01 set of specimen shall have the same technical specification VIII Environment management plan Contractor’s organization 1.1 Contractor’s Organization Chart: Head office Project Manager Group of staffs in charge of environment under Project Management Board Environment Staff of Road construction teams Environment Staff of Bridge construction teams Page - 16 Environment Staff of Drainage construction teams Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) 1.2 Duty of charge-in staffs: - Have knowledge of law as well as procedures, and other relative documents to the environment in Vietnam - Prepare environment control plan to submit the Employer - Instruct environment staffs of construction teams - Take full responsibility in actions to ensure the environment safety - Collect information from environment staffs of construction teams - Report environment activities to the Emp loyer - Make a daily site record 1.3 Duty of environment staffs of construction teams: - Have knowledge of law as well as procedures, and other relative documents to the environment in Vietnam - Receive orders from Director’s board and then instruct construction teams - Supervise daily the execution of works relating to the environment - Report daily to Director’s board - Comply with all matters conveyed by environment manager and then instruct construction staffs - Inspect all matters relating to the environment prior to construction - Inspect the equipment, machines ensuring the safety of environment - Remind construction teams to comply with the approved construction methods - Inspect working conditions - Report the implementation to environment manager Environment Protection Measures - Prior to commencement of works, the Contractor shall prepare environment protection draft signed by the leader of the Contractor to commit to meet the regulations on environment protection in construction, complying with the current law of State - The Contractor shall obtain licenses, and procedures required for environment protection from the legal bodies prior to construction - Enhance frequently knowledge of environment for construction staffs and local resident Popularize measures to minimize the effects to environment 2.1 Air - The following measures shall be used to minimize the effects to the environment during the process of mixing concrete: + Cleaning frequently and watering the location of concrete mixing plant, crushing machine and auxiliary areas to minimize the dust + Dry mixing plant shall be executed within the area where has been covered + Installing and operating the control system of air pollution available + Cleaning frequently and watering the concrete mixing machine and crushing machine + All stockpiles of sand and materials within the area of mixing plant with volume of over 50m3 shall be closely covered Page - 17 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - All internal-combustion engines shall be stopped immediately after not being required to use - All sources causing waste and attachments shall be checked and maintained frequently - Spray water on pathways and lay straw on the ground where traffic passes and footpath to avoid dust - Use anti-dust equipment in crushing stone Crushing machine and similar equipment shall be located at the suitable locations - Spray water against dust during all process of break, crush or remove Equipment of watering shall be used during load and unload the excavated materials and at area of excavation and filling However, watering too much should be avoided - When use of anti-dust methods, oil is forbid, salt and near- river salt solutions are avoided - For works relating to sand, paying attention for speed and direction of wind to avoid sand flying towards the site or residential area - During process of pouring or transporting materials such as sand, stone, etc., dust shall be conducted to the disposing equipment and the height of exceed 2m far from source of pouring material shall be lowered - Cement and fine materials shall be taken as singles stored in tight silos attached with high-alarm device - All air holes in cement silos shall be equipped with suitable cloth filter with cleaning structure by air shake or vibration - Conveyor belts shall be attached with wind-shields, the transmission points of conveyor belt and funnels shall be covered to minimize the dust - Do not burn waste in the open air, not including twig, tree and falling leaf - The waste arising from construction shall be re-used if possible - The equipment of wheel washing shall be located at all entrances of the Site to protect the area out of Site and public traffic of local from the dust Water used for washing shall be cleaned from mud and sand every time a week, at least - All open-bucket cargo trucks transport material which arising dust shall be equipped with the guard around and behind Materials covered by new and clean plastic-cloth, shall not be higher than guard - Speed of truck and cars at the Site shall not exceed 15km/h to the dust Cargo trucks of sand transport shall be covered by canvas during passing the resident areas - The explosion activities shall be prepared carefully, paying attention for suitable prevention to minimize the dust such as: using exploding net, covering canvas and watering to raise the water content of materials which to be exploded 2.2 Water - Build septic tanks, chemical pits, and small drainage works No directly discharging wastewater from one septic tank into the surface water - Water of rains overflowing construction area shall not be disposed directly into natural streams - Drainage works shall be checked and maintained frequently - Inspect frequently equipment and machines to prevent petrol and oil leak Lubricant shall be renewed only in the maintenance area Page - 18 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Water arising from the areas of car maintenance, machine repair and wheel washing shall be run into equipment of oil disposing prior to remove 2.3 Noise - The works constructed within 100m far from hospital and residential area shall be limited within the time from AM to PM - All sources causing noise shall be located as far from housing and site camp as possible - Stop operation of all machines with engine which not be used during the specified duration - Use some of the most modern sound proofing devices for the electric mechanic equipment - Equipment and heavy machines shall be used in good conditions to minimize the noise - The sections have to execute in the evening or at nighttime shall be only executed works that not causing much noise - Signs using the light such as twinkle lamp should be replaced for whistle or bell to instruct changing the shift, placing concrete or other works at site Alarm signs using the sound shall be used only for emergencies - Maintain frequently and operate machines only in good conditions - Contractor shall use a provisional plan for complaints and exceeding of noise allowed during the implementation of work 2.4 Waste - Waste arising from living shall be disposed into dustbin made by metal or plastic with cover, or specified plastic - Use specified trucks transport rubbish, soil or aggregate for disposing waste arising from living activities - Waste during construction process shall be stored and disposed in the separated areas where have been approved by the Employer locating far from resident areas, surface water, under-ground water or edge of the banks - Contractor shall separate waste of construction materials at Site to reuse or reprocess - Oil, chemical, pain waste, etc shall be collected and stored in separated areas to sell or reuse - Contractor shall sign the Contract with local Environment Company to dispose the living waste - Using bury method at the Site for disposing some of waste The bury area shall be designed in compliance with the license of legal bodies 2.5 Dangerous goods and chemical - Products of oil, lubricant and others may cause pollution shall be stored in the safety locations which is far from natural streams The storage locations shall be 200m far from streams and wet areas It also not included in the flooded area Besides, main direction of wind as well as characteristic of geology and hydrograph shall be considered - Tanks of petrol product shall be surrounded by trench in order to protect the areas out of trench from overflow of petrol product Page - 19 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - The storage locations shall be marked clearly to avoid the damages of tank caused by operation of construction machine and equipment - All unused tanks shall be covered Things which are stored in tanks shall be taken safety and fully out of tank in work completion - Case of overflowing a polluted product, have to stop rapidly overflow, control and limit the overflowed product, and then take back product and remove waste as well as restore the location For the breakdown on the ground, filling the dyke to keep around the pollution or excavating the trench For the breakdown in water, using the floating guards made by straw or attracting material - When pollution substances are collected, restoring it by available devices such as attractor, cask, pump, shovel, etc - The polluted soil shall be removed if it causes pollution of under ground water in danger This soil shall be put at the proposed location If no any safe area is available to stockpile this polluted soil, it must be covered by canvas or put in stores 2.6 Ecological resources, and valued sources of archaeology and history - The use of machines in construction maybe exposed the remains with value of archaeology, biology or history In this case, staffs of Contractor shall inform rightly to the Site supervisor The remains maybe have great value then Contractor shall execute the following measures of protection and maintenance: + Report to the government at various levels + Protect the area by marking at the site + Resume the work - Furthermore, measures of landscape protection have to execute during construction These measures shall be shown rightly in drawings and cost estimate The suitable means maybe used for area separation of protection with free entrance for pedestrian, and entrance for inspecting and measuring and drawing + The following measures shall be applied to minimize the effects to ecological: + Do not remove any plant or tree on the ground out of site limits + Site fence shall be constructed at the limit of whole site + Contractor shall protect all trees within the limit of site if they are out of construction area and not effecting to the construction 2.7 Procedures in emergency case on environment - Contractor pre-prepares the plan ready for the emergency case on environment, submits to the relative authorities prior to construction Post up will be shown for measures of control, and preventive at area where emergency cases on environment are happened 2.8 Site layout - Site layout shall include generally office area, storage and yard, machine and equipment repairing and maintaining workshop, and parking ground Constructing the Site camp for workers in the case of the project far from city center Besides, need to pay attention for the things effecting to the environment such as water supply, control of wastewater, waste and sewage arising from living activities as well as construction - The site is laid out so that environment is affected at minimum Page - 20 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - The system of living waste and sewage treatment as well as construction wastes will be arranged at the site The site is inspected and cleaned and insects are controlled at a regular basis Page - 21 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) PART II - CONSTRUCTION METHOD A General construction method: I Construction site layout: - Main road (phase 2) Grade class A, Designed speed 120 km/h conform to International Standard Typical cross - section of main road as follows: + Bsurface = 30,0m - + Bembankment = 33,0m + Carriage part (6 lanes) (3,75x6) = 22,5m + Median by concrete = 1,0m + Safety strip 2x0.75m = 1,5m + Emergency strip 2x3,0 = 6,0m + Road shoulder = 2,0m 2x 1,0m + Transverse gradient: i = 2,5% + Transverse gradient of cross fall: i = 6% Ramp road Typical cross section follows: + Bsurface = 10,0m + Bembankment = 13,0m + Carriage part (2 lanes) (2x3,5m) = 7,0m + Road shoulder = 2,0m 2x 1.0m + Transverse gradient: i = 2,5% + Transverse gradient (cross fall): i = 6,0% II Scope of works - Soft soil treatment by vertical artificial drain, compacting sand drain D=0,7m, sand drain D=0,4m - Filling embankment K95, K98 - Constructing drainage system - Constructing road foundation (sub-base and base) - Constructing asphalt pavement - Constructing safety system for road and bridge - Constructing bridges III Technical method - Pavement structure for Ramp roads: - 50mm Fine asphalt concrete - Tack coat - 140mm medium-size asphalt concrete - Tack coat Page - 22 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - 120mm asphalt treatment base course - Prime coat - 400mm aggregate course class I - 300mm compacted embankment K=0,98 - Soft soil improvement as follows: - Soft soil treatment by vertical artificial drain - Soft soil treatment by sand drain D=0,40m - Soft soil treatment by compacting sand drain D=0,7m - Drainage system as follows: - Constructing drainage system: pipe culvert, box culvert by concrete reinforcement according to Design Standard of 22TCN18-79 - Construction of Bridges on alignment: - Constructing 04 bridges on the alignment by PCI girder and Pre-stressed cast-inplace hollow-plant girder, bored piles D=1,2m and 1,5m - Main work items: + Common excavation: 14.046m3 + Unsuitable excavation: 46.873m3 + Movement of surcharge material: 61.976m3 + Re-use excavated material: 0m3 + Filling K98: 29.371m3 + Filling K95: 269.81m3 + Backfill K90: 9.113m3 + Filling and covering slope: 57.785m3 + Filling load: 48.677m3 + Settlement compensation: 27.403m3 + Filling draining sand: 31.415m3 + Woven and non-woven geo-textile: 90.915m2 + Sand well with diameter 0,4m: 45.089m + Compacting sand drain with diameter of 0,7m: 87.601m + Vertical artificial drain: 16.487m + Settlement monitoring device: + Rough asphalt course thickness 30mm: 11.680m2 + A/C surface course thickness 70mm: 1.423m2 + A/C surface course on bridge thickness 71mm: 252m2 + A/C binder course thickness 70mm: 65.596m2 + 120mm bituminous treated base: 66.480m2 + A/C binder course thickness 50mm: 11.229m2 + 100mm bituminous treated base: 1.123m2 + Aggregate Subbase: 6.617m3 + Aggregate Base: 33.777m3 Page - 23 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) + Prime coat: 83.532m2 + Tack coat: 155.283m2 + Various pipe culvert: 1.954m + Various box culvert 186m + Ditch: 8.165m + Sodding: 61.566m2 IV - General construction method: Site layout: After having an investigation of site, the Contractor proposes to arrange the site as follows: - Project Management Board, Site Laboratory, Accommodation for Engineer will be located at nearly site, Thanh Tri bridge, Gia Lam, Ha Noi - Casting yard of concrete structures, houses, site huts for the Contractor’s workers will be located at the locations of bridges - Asphalt concrete mixing plant shall be located at Red river area nearly Thanh Tri bridge, Gia Lam, Ha Noi - Cement concrete mixing batches will be located Ramp-A and Ramp-B bridge area Construction layout: 2.1 Construction teams: - The Contractor arranges 08 construction teams: in which 02 ones for embankment construction, one for pavement construction, 03 ones for bridge construction, one for pipe culvert, box culvert and underpass culvert construction and one for other work items and finishing works: - 02 construction teams for embankment construction will be responsible for all of embankment works + Construction Team No.1: constructed Left side of expressway (Ram A, Ramp B, Ramp E, Ramp I) + Construction Team No.2: constructed Right side of expressway (Ram A, Ramp B, Ramp E, Ramp J) - One construction team for pavement construction will be responsible for all foundation and pavement works - One construction team for ditch construction will be responsible for all pipe culvert, box culvert, underpass culvert, drainage system - One construction team for other working items and finishing work - 03 construction teams for bridges construction on the overall alignment + Construction Team No.1: constructed Ramp-A bridge + Construction Team No.2: constructed Ramp-B bridge - + Construction Team No.3: constructed Gia Lam and Ramp-E bridge, retaining wall, pre-cast concrete pile of underpass ring road No.3 The following construction assembly lines shall be included: + Cut and fill construction assembly line + Soft soil improvement construction assembly line Page - 24 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) + Construction assembly line for road bed + Pavement structure construction assembly line + Construction assembly line for drainage and other items of the work + Construction assembly line for bridge construction 2.2 Construction sequences - Preparing works - Construction of soft soil treatment - Embankment construction - Construction of drainage system - Construction of roadbed - Asphalt concrete pavement construction - Construction of frontage road pavements - Construction of other items - Bridges and embankment construction B Detail construction method of work item: I Bridge construction method General introduction Package EX-1A consists of bridges: Ramp-A bridge, Ramp-B bridge, Gia Lam bridge and Ramp-E bridge Data of bridges Name Station Length Width Remark Ramp-A R.R III interchange 499 12.0 Hollow box girder Ramp-B R.R III interchange 502 12.0 Hollow box girder Gia Lam Ramp J 50 7.4 I girder, widening Ramp-E Rap E 50 15.6 I girder 1.1 Ramp-A bridge * General introduction: - The Ramp-A bridge is belonging to Package EX-1A (Phase 1), Hanoi - Haiphong expressway Construction Project At beginning project of Ha Noi - Hai Phong Expressway be designed a interchangein with Ring road II modified clover-leaf and be in the form of a tunnel passing under Ringroad III Bridge Ramp-A is lying on road Ramp-A in this interchange * Natural conditions: Topo and geographical features - The Bridge is located at the area which is a relative flat terrain with small ponds and some leveling areas Elevation is not change much; terrian surface is separated by canals, earth bank and ponds Geological features Page - 25 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) Stratum of studied area is quite identical and can be divided to layers, sub-layers as follows: - Layer 1: Made ground, sandy clay, brownish blackish grey, medium stiff - Layer 2: Clay, blackish grey, yellowis grey, soft to medium stiff - Layer 3: Clay, grey, blackish grey, reddish grey, white grey, soft to medium stiff - Layer 4: Sandy clay, reddish grey, yellowish grey, blue grey, soft to medium stiff - Layer 4A: Sandy brow, yellowish grey, medium stiff - Layer 5B: Fine sand, white grey, yellowish grey, reddish grey, medium stiff - Layer 7: Fine sand, darkish grey, yellowish grey, stiff - Layer 8: Sand with cobble, darkish grey, yellowish grey, medium stiff, dense - Layer 9: Sand, blue grey, yellowish grey, white grey cobble with sand, very dense - Layer 10: Gravel sand, reddish grey, yellowish grey, blue grey, very dense * Scale and technical specification Applied Standard Specification and code Following approved standard frame for this project Technical Specification - Bridge is permanent structure, made by rebar concrete and pre-stressed concrete - Total width of Bridge: B = 12m - Live load: HL-93 base on Bridge specification 22TCN 272-05 - Clearance for underpass road: BxH = 30.5mx5.0 m - Earthquake: Acceleration coefficient A=0.0769, follow TCXDVN 375:2006 - Basic design wind velocity: V=45m/s based on 22TCN 272-05 (wind zone II.B according to TCVN 2737-1995) - Designed speed 60km/h Bridge structures: - Bridge length between ends of abutment wing walls L=499.4m - Bridge consists of 14 spans of pre-stressed concrete hollow slab girder divided continuous series; - Span arrangement: (4x30+33.5+2x35+33.5+3x35+3x35)m - Cross section bridge’s width is B=12m Superstructure - The girders are pre-stressed concrete hollow slab ones; section by section on the scaffold construction - The girder’s cross sections have constant height H= 1.45m; girder’s width is 11.7m; - Wearing surface is 50mm asphalt concrete, Rough asphalt course is 30mm and 4mm waterproofing layer Substructure - Abutment structure: reinforced concrete abutment with width B=12m, Height from top of pile cap to top of stem wall is 9.554m at A0-A and 9.838 at A14-A Pile cap is 2,0m thickness, use cast-in-placed pile with diameter D1.2m, piles for each abutment; there are approach slabs with 8m length and 0,4m thickness behind the abutment Page - 26 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Pier structure: reinforced concrete pier and styles Type is fix pier and body column Cross section of columns are octagon sharps Type is connecting sereis of girder and widening head – stock to support bearings, Y sharps Pilecaps are 2.0m thickness, used bored pile with diameter D=1.2m, piles for each pier pilecaps - Pile length: based on geology situation of boreholes at positions of piers and abutments, length of bored pile with diameter D = 1.2m are varied from 41m to 44m Other structures - Expasion Jont using type steel comb - Steel pot bearing are used - Handrail make of galvanized steel, hot dip - Drainage: surface water collected on the pier and abutment - Quarter-cone and cut-off part are install by precast facing 1.2 Ramp-B bridge * General introduction: - The Ramp-B bridge is belonging to Package EX-1A (Phase 1), Hanoi - Haiphong expressway Construction Project At beginning project of Ha Noi - Hai Phong Expressway be designed a interchangein with Ring road II modified clover-leaf and be in the form of a tunnel passing under Ringroad III Bridge Ramp-B is lying on road Ramp-B in this interchange * Natural conditions: Topo and geographical features - The Bridge is located at the area which is a relative flat terrain with small ponds and some leveling areas Elevation is not change much; terrian surface is separated by canals, earth bank and ponds Geological features Stratum of studied area is quite identical and can be divided to layers, sub-layers as follows: - Layer 1: Made ground, sandy clay, brownish blackish grey, medium stiff - Layer 2: Clay, blackish grey, yellowis grey, soft to medium stiff - Layer 3: Clay, grey, blackish grey, reddish grey, white grey, soft to medium stiff - Layer 4: Sandy clay, reddish grey, yellowish grey, blue grey, soft to medium stiff - Layer 5B: Fine sand, white grey, yellowish grey, reddish grey, medium stiff - Layer 6: Fine sand, white grey, blue grey, yellowish grey, medium stiff to stiff - Layer 7: Fine sand, darkish grey, yellowish grey, stiff - Layer 8: Sand with cobble, darkish grey, yellowish grey, medium stiff, dense - Layer 9: Sand, blue grey, yellowish grey, white grey cobble with sand, very dense - Layer 10: Gravel sand, reddish grey, yellowish grey, blue grey, very dense - Layer 11: Sand with cobble, blue grey, darkish grey, very dense * Scale and technical specification Applied Standard Specification and code Following approved standard frame for this project Technical Specification Page - 27 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Bridge is permanent structure, made by rebar concrete and pre-stressed concrete Total width of Bridge: B = 12m Live load: HL-93 base on Bridge specification 22TCN 272-05 Clearance for underpass road: BxH = 30.5mx5.0 m Earthquake: Acceleration coefficient A=0.0769, follow TCXDVN 375:2006 Basic design wind velocity: V=45m/s based on 22TCN 272-05 (wind zone II.B according to TCVN 2737-1995) - Designed speed 120km/h Bridge structures: - Bridge length between ends of abutment wing walls L=502.4m - Bridge consists of 14 spans of pre-stressed concrete hollow slab girder divided continuous sereis; - Span arrangement: (4x30+33.5+2x35+33.5+3x35+3x35)m - Cross section bridge’s width is B=12m Superstructure - The girders are pre-stressed concrete hollow slab ones; section by section on the scaffold construction - The girder’s cross sections have constant height H= 1.45m; girder’s width is 11.7m; - Wearing surface is 50mm asphalt concrete, Rough asphalt course is 30mm and 4mm waterproofing layer Substructure - Abutment structure: reinforced concrete abutment with width B=12m, Height from top of pile cap to top of stem wall is 9.885m at A0-B and 9.838 at A14-B Pile cap is 2,0m thickness, use cast-in-placed pile with diameter D1.2m, piles for each abutment; there are approach slabs with 8m length and 0,4m thickness behind the abutment - Pier structure: reinforced concrete pier and styles Type is fix pier and body column Cross section of columns are octagon sharps Type is connecting sereis of girder and widening head – stock to support bearings, Y sharps Pilecaps are 2.0m thickness, used bored pile with diameter D=1.2m, piles for each pier pilecaps - Pile length: based on geology situation of boreholes at positions of piers and abutments, length of bored pile with diameter D = 1.2m are varied from 41m to 44m Other structures - Expasion Jont using type steel comb - Steel pot bearing are used - Handrail make of galvanized steel, hot dip - Drainage: surface water collected on the pier and abutment - Quarter-cone and cut-off part are install by precast facing 1.3 Gia Lam bridge * General condition - The Gia Lam bridge is belong to Package EX-1A (Phase 1), Hanoi – Hai Phong expressway construction project This is widening bridge (7.4m) at the existing Gia Lam bridge and near Ramp-E bridge Structure of existing bridge: Abutment is U Page - 28 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) shapr, reinforced concrete, foundation use cast in place pile with diameter D=1.5m, 16 piles for each abutment with 42.0m length Supper structure use PCI girder, length is 32.95m spacing of girder is 2.2m * Natural conditions: Topo and geographical features - The Bridge is located at the area which is a relative flat terrain with small ponds and some leveling areas Elevation is not change much; terrian surface is separated by canals, earth bank and ponds Geological feature For details of geological cross section refer to general layout of bridge and geological investigation report Signs and characteristic stratum are as follows: - Layer 1: Made ground, sandy clay, brownish blackish grey, medium stiff - Layer 2: Clay, blackish grey, yellowis grey, soft to medium stiff - Layer 3: Clay, grey, blackish grey, reddish grey, white grey, soft to medium stiff - Layer 4: Sandy clay, reddish grey, yellowish grey, blue grey, soft to medium stiff - Layer 4A: Sandy brow, yellowish grey, medium stiff - Layer 5B: Fine sand, white grey, yellowish grey, reddish grey, medium stiff - Layer 7: Fine sand, darkish grey, yellowish grey, stiff - Layer 8: Sand with cobble, darkish grey, yellowish grey, medium stiff, dense - Layer 9: Sand, blue grey, yellowish grey, white grey cobble with sand, very dense - Layer 10: Gravel sand, reddish grey, yellowish grey, blue grey, very dense * Scale and technical specification Applied Standard Specification and code Following approved frame of standard for the project Technical Specification - Bridge is permanent structure, made by rebar concrete and pre-stressed concrete - Total width of Bridge after widening: B = 33.5m - Width of widening is 7.4m - Live load: HL-93 base on Bridge specification 22TCN 272-05 - Clearance for under bridge: BxH = 9.0mx4.75m - Earthquake: Acceleration coefficient A=0.0769, conform to TCXDVN 375:2006 - Basic design wind velocity: V=45m/s based on 22TCN 272-05 - Annual average humidity: H=85% - Temperature range: +50C÷ + 470C - Alignment is designed to conform to Ring road III specification, design speed is 100km/h * Bridge structure - Bridge length between two ends of abutment wings: L=50.0m - Span arrangement: 1@32.95m.Bridge has two expansion joints at abutments - Width of bridge after widening is 33.5m Superstructure Page - 29 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Using PC-I girder with 33m span length It is distributed 15 girders with 1,65m height (distance 2.2m) In where, no widenning part is girders (existing bridge); widenning part is girders (6 girders’existing bridge, new girders and girder is re used) Minimum thickness of deck slab 180mm - Wearing surface is 71mm asphalt concrete and 4mm waterproofing layer Substructure - Abutment: Abutments are RC structure; height from bottom of pile cap to top of head wall is 12.936m at abutment A0-GL and A1-GL, pilecap is 1.7m to 2.0m thickness Bored piles foundation piles 1,5m diameter for abutment A0-GL and A1-GL with length is 42.0m (Widenning part) Other structures - Quarter-cone and foot are in mortar rip rap - Expasion Joint is rubber type - Bearing is used rubber bearing shoe 1.4 Ramp-E bridge * General condition - The Ramp-E bridge is belonging to Package EX-1A (Phase 1), Hanoi – Hai Phong expressway Construction Project Bridge is lying on road Ramp-E input of Ring road III, near existing Gia Lam bridge * Natural conditions: Topo and geographical features - The Bridge is located at the area which is a relative flat terrain with small ponds and some leveling areas Elevation is not change much; terrian surface is separated by canals, earth bank and ponds Geological feature For details of geological cross section refer to general layout of bridge and geological investigation report Signs and characteristic stratum are as follows: - Layer 1: Made ground, sandy clay, brownish blackish grey, medium stiff - Layer 2: Clay, blackish grey, yellowis grey, soft to medium stiff - Layer 3: Clay, grey, blackish grey, reddish grey, white grey, soft to medium stiff - Layer 4: Sandy clay, reddish grey, yellowish grey, blue grey, soft to medium stiff - Layer 4A: Sandy brow, yellowish grey, medium stiff - Layer 5B: Fine sand, white grey, yellowish grey, reddish grey, medium stiff - Layer 7: Fine sand, darkish grey, yellowish grey, stiff - Layer 8: Sand with cobble, darkish grey, yellowish grey, medium stiff, dense - Layer 9: Sand, blue grey, yellowish grey, white grey cobble with sand, very dense - Layer 10: Gravel sand, reddish grey, yellowish grey, blue grey, very dense * Scale and technical specification Applied Standard Specification and code Following approved frame of standard for the project Technical Specification - Bridge is permanent structure, made by rebar concrete and pre-stressed concrete Page - 30 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Total width of Bridge: B = 15.6m - Live load: HL-93 base on Bridge specification 22TCN 272-05 - Clearance for under bridge: BxH = 9.0mx4.75m - Earthquake: Acceleration coefficient A=0.0769, conform to TCXDVN 375:2006 - Basic design wind velocity: V=45m/s based on 22TCN 272-05 - Annual average humidity: H=85% - Temperature range: +50C÷ + 470C - Alignment is designed to conform to ramp road specification, design speed is 50km/h * Bridge structure - Bridge length between two ends of abutment wings: L=50.0m - Span arrangement: 1@32.95m.Bridge has two expansion joints at abutments Superstructure - Using PC-I girder with 33m span length Itis distributed girders with 1,65m height (distance 2.2m) Minimum thickness of deck slab 180mm - Wearing surface is 50mm asphalt concrete, Rough asphalt course is 30mm and 4mm waterproofing layer Substructure - Abutment: Abutments are RC structure; height from bottom of pile cap to top of head wall is 13.193m at abutment A0-E and 12.863m at abutment A1-E, pilecap is 2.5m thickness Bored piles foundation piles 1,5m diameter for abutment A0-E with length is 42.0m and piles 1,5m diameter for abutment A1-E with length is 42.0m Other structures - Quarter-cone and foot are in mortar rip rap - Expasion Joint is rubber type - Bearing is used rubber bearing shoe Arrangement of construction team The contractor arranges 03 construction team for bridge follows: - 01 teams constructed Ramp-A bridge - 01 team constructed Ramp-B bridge - 01 team constructed Gia Lam and Ramp-E bridge Site arrangement of Bridge: 3.1 Site of Ramp-A bridge: The site consists of the following items: - Site office - Accommodation for workers - Cement store - Storehouse - Generator - Guardhouse - WC - Kitchen Page - 31 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Water tank - Transformer - Cement concrete mixing plant 60m3/h - Sand, aggregates stockpile yard - Reinforcement fabrication yard - Equipment/plant yard - Road for traffic insurance - Access road system, guard fence, lighting system 3.2 Site of Ramp-B bridge: The site consists of the following items: - Site office - Accommodation for workers - Cement store - Storehouse - Generator - Guardhouse - WC - Kitchen - Water tank - Transformer - Cement concrete mixing plant 60m3/h - Sand, aggregates stockpile yard - Reinforcement fabrication yard - Equipment/plant yard - Road for traffic insurance - Access road system, guard fence, lighting system 3.3 Site of Ramp-E and Gia Lam bridge: The site consists of the following items: - Site office - Accommodation for workers - Storehouse - Generator - Guardhouse - WC - Kitchen - Water tank - Transformer - Reinforcement fabrication yard - Casting yard and stockpile of PCI girder - Equipment/plant yard Page - 32 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Access road system, guard fence, lighting system Main construction method 4.1 Ramp-A bridge: Construction method of substructure: - Piers P9-A and P10-A are constructed on land, using foundation pit without cofferdam (driving steel sheet pile on the existing road side) - Other sub-structures are constructed on land, using foundation pit without cofferdam Construction method of superstructure: - The superstructure is pre-stressed RC continuous hollow slab girder, C.P.I on scaffolding 4.2 Ramp-B bridge: Construction method of substructure: - Piers P5-B and P6-B are constructed on land, using foundation pit without cofferdam (driving steel sheet pile on the existing road side) - Other sub-structures are constructed on land, using foundation pit without cofferdam Construction method of superstructure: - The superstructure is PC tendon RC continuous hollow slab girder, C.P.I on scaffolding 4.3 Ramp-E bridge and Gia Lam: Construction method of substructure: - Abutments A0-E, A1-E, A0-GL and A1-GL will be constructed on land, using foundation pit without cofferdam (driving steel sheet pile on the existing road side) Construction method of superstructure: - Use 02 Crane to lifting launching PCI girder to location Construction method of substructure: 5.1 Construction method of abutment on land using foundation pit without cofferdam The basis construction sequence is as follows: - Form construction ground at the location of abutment to the estimated elevation - Bored piles are constructed by specialized drilling machine - Use excavator and manpower to excavate the ground to the designed level - Place a 20cm blinding stone bedding - Place a 10cm leveling concrete to the bottom elevation of the foundation footing - Break concrete of pile top and treat reinforcement of pile top according to the design - Install reinforcement, formwork for placing concrete for abutment footing - Remove formwork, backfill foundation pit to the top elevation of abutment footing - Install scaffolding, rebar, formwork, place concrete for body, wing wall of abutment - Construct bearing pad of abutment - Remove formwork, scaffolding - Backfill behind the abutment, ¼ slope, place masonry stone for ¼ slope of abutment - Construct approach slab and complete abutment Page - 33 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) 5.2 Construction method of abutment on land using foundation pit with steel sheet pile cofferdam The basis construction sequence is as follows: - Form construction ground at the location of abutment to the estimated elevation - Bored piles are constructed by specialized drilling machine - Use crane in combination with vibrating hammer to install steel sheet pile cofferdam near the existing road side - Place a 20cm blinding stone bedding - Place a 10cm leveling concrete to the bottom elevation of the foundation footing - Break concrete of pile top and treat reinforcement of pile top according to the design - Install reinforcement, formwork for placing concrete for abutment footing - Remove formwork, backfill foundation pit to the top elevation of abutment footing - Install scaffolding, rebar, formwork, place concrete for body, wing wall of abutment - Construct bearing pad of abutment - Remove formwork, scaffolding - Backfill behind the abutment, ¼ slope, place masonry stone for ¼ slope of abutment - Construct approach slab and complete abutment 5.3 Construction method of pier on land, using foundation pit without cofferdam The basis construction sequence is as follows: - Form construction ground to the estimated elevation - Bored piles are constructed by specialized drilling machine - Use excavator and manpower to excavate the ground to the designed level - Place a 20cm blinding stone bedding - Place a 10cm leveling concrete to the bottom elevation of the foundation footing - Break concrete of pile top and treat reinforcement of pile top according to the design - Install reinforcement, formwork for placing concrete for pier footing - Remove formwork, backfill foundation pit to the top elevation of pier footing - Install scaffolding, rebar, formwork, place concrete for body, cap beam of pier - Remove formwork, scaffolding, backfill foundation pit to the existing ground, complete pier 5.4 Construction method of pier on land, using foundation pit with steel sheet pile cofferdam The basis construction sequence is as follows: - Leveling and forming the construction ground of pier to the estimated level - Bored piles are constructed by specialized drilling machine - Use crane in combination with vibrating hammer to install steel sheet pile near the existing road side - Place a 20cm blinding stone bedding - Place a 10cm leveling concrete to the bottom elevation of the foundation footing - Break concrete of pile top and treat reinforcement of pile top according to the design - Install reinforcement, formwork and place concrete for pier foundation footing Page - 34 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Remove formwork, backfill foundation pit to the top elevation of foundation footing - Install scaffolding, reinforcement, formwork, place concrete for body of pier - Remove formwork, scaffolding and complete pier - Backfill foundation pit and remove steel sheet pile cofferdam Construction method of superstructure 6.1 Ramp-A bridge: - The superstructure is pre stressed RC consecutive hollow slab girder, constructed by cast-in-place method on scaffolding - Construction sequence of segments of girder is as follows: + Team1: (K1→K2→K3→K4 of serei 2) → (K1→K2→K3→K4 of serei 1) + Team2: (K1→K2→K3 of serei 3) → (K1→K2→K3 of serei 4) Construction sequence for one segment: - Mobilize equipment, material - Construction embankment + Remove soft soil layer within construction area + Place a compacted sand layer + Loading and waitting settelment + Place a compacted crushed stone layer K95, h=30cm + Install RC slab on the crushed stone bedding - Install scaffolding system by shape steel supporting bar - Load test and dispose all redundant deformation, settlement of scaffolding system - Install bearing, formwork, reinforcement, duct, pre-stressed cable - Place concrete and cure concrete for block - Perform tension of pre-stressed cable after concrete reached to the required strength - Pump mortar to fill in the duct inside - Remove scaffolding and move to next block The finishing works - Parapet is constructed after finishing each Segment - When all blocks of girder are completed, construct guardrail, expansion joint… - Construct drainage system, bridge surface covering layer - Complete bridge 6.2 Ramp-B bridge: - The superstructure is pre stressed RC consecutive hollow slab girder, constructed by cast-in-place method on scaffolding - Construction sequence of segments of girder is as follows: + Team1: (K1→K2→K3 of serei 2) → (K1→K2→K3→K4 of serei 1) + Team2: (K1→K2→K3 of serei 3) → (K1→K2→K3→K4 of serei 4) Construction sequence for one segment: - Mobilize equipment, material Page - 35 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) - Construction embankment + Remove soft soil layer within construction area + Place a compacted sand layer + Loading and waitting settelment + Place a compacted crushed stone layer K95, h=30cm + Install RC slab on the crushed stone bedding - Install scaffolding system by shape steel supporting bar - Load test and dispose all redundant deformation, settlement of scaffolding system - Install bearing, formwork, reinforcement, duct, pre-stressed cable - Place concrete and cure concrete for block - Perform tension of pre-stressed cable after concrete reached to the required strength - Pump mortar to fill in the duct inside - Remove scaffolding and move to next block The finishing works - Parapet is constructed after finishing each Segment - When all blocks of girder are completed, construct guardrail, expansion joint… - Construct drainage system, bridge surface covering layer - Complete bridge 6.3 Ramp-E and Gia Lam bridge: Pre stressed RC I girders are cast at the casting yard nearly the bridge Use 02 Cranes to lifting and launching PCI girders to location Installation steps are as follows: Step 1: Construct access road - Use bulldozer to level the ground to the design level - Construct access road Step 2: Construct launching girders - Used to 02 crane to lift girder on specialized truck - Transported to location span for launching - At this span, used to 02 Cranes to launching PCI girders - When finish launching, fixed all girders Step 3: Construct cross beam, surface of bridge and completion works - Construct cross beam, deck slab - Place concrete for parapet - Pave AC - Install expansion joint - Install drainage system - Completion works General construction works: Page - 36 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) In this section, the contractor presents general, representative and public items for construction of bridge It is included: - Construction work for concrete and reinforcement concrete - Construction work for bored pile on land - Pre-stressed PCI Girder casting work, L=33m - Construction work for hollow slab girder by cast-in-place method on scaffolding 7.1 Construction work for concrete and reinforcement concrete Material: - Materials used for producing concrete, reinforced concrete shall meet criteria as stated in the Technical Specifications - Prior to putting materials in construction, the Contractor shall take sampling, taking necessary tests as specified in the Technical Specifications The Contractor shall submit to the Engineer sample of materials, location of borrow pits, Catalogue and material certificates of the manufacturer, test results done by the Contractor’s Lab and laboratories as directed by the Employer, the Engineer Cement: - Use Portland cement class I in accordance with ASTM C150 (AASHTO M85) or PC40 complying with Vietnam standard TCVN 2682 – 1999 - At site, cement shall be kept in walled and roofed store, arranged and maintained in accordance with the Technical Specifications Cement shall be hauled gradually from the supplying place to the site in compliance with construction schedule to prevent from storing cement over 60days at site Cement shall be placed 1m away from the wall, not overlapped more 13 bags on platform that is placed 50 cm higher than the floor to make aisle, easily carry and inspect Admixture: - When admixture is required for concrete of the Works, the Contractor shall submit to * Casting pipes + + + + + * Transporting pipes * Construction work + + + + + + + + + + + + + + Sub-base and base: + + + + + + + + Asphalt concrete pavement * Production of hot AC + + + + + + + ∅ ∅ + + + + + + + + + + + + + + + + + + + + + + + + + + + ∅ ∅ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + Retaining wall construction method + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + Construction method of R.C pile for Underpass of Ring Road III + + + + + + + + + + + + + Special method of approach road construction: A - Narative description of Site Oranization Chart: * Project Management Board (PMB): * Tasks of Project Management Board: * Project Management Board includes: ... Hai Phong Expressway Project : Package EX-1A (Km0-420 ÷ Km1+065.74) Contractor’s organization 1.1 Contractor’s Organization Chart 1.2 Duty of charge-in staffs 1.3 Duty of environment staffs of... of work items I Bridge construction method General introduction 1.1 For Ramp-A bridge 1.2 For Ramp-B bridge 1.3 For Gia Lam bridge 1.4 For Ramp-E bridge Arrangement of construction units for Bridge... thickness 50mm: 11.2 29m2 + 100mm bituminous treated base: 1.1 23m2 + Aggregate Subbase: 6.617m3 + Aggregate Base: 33.777m3 Page - 23 Ha Noi - Hai Phong Expressway Project : Package EX-1A (Km0-420