I. PROJECT’S GENERAL INFORMATION ................................................................. 4 II. SUMMARY OF WORK VOLUME ............................................................................. 5 II.1 PYLON PY1: ................................................................................................................ 5 II.2 PYLON PY2: ................................................................................................................... 6 III. EQUIPMENT AND MANPOWER FOR EXECUTION................................................ 6 III.1 SUBMITTED CONSTRUCTION EQUIPMENT ...................................................................... 6 III.2 MANPOWER FOR CONSTRUCTION: ............................................................................... 11 III.2.1 Chart of construction organization .................................................................. 11 III.2.2 List of SubContractor’s Manpower: ................................................................. 12 III.3 PREPARATION WORK: ................................................................................................. 13 III.3.1 Office staff and worker: ................................................................................... 13 III.3.2 Material gathering yard: .................................................................................... 13 III.3.3 Protection work: .............................................................................................. 14 III.3.4 Electricity for execution: ..................................................................................... 14 III.3.5 Water source: ................................................................................................... 15 III.3.6 Drainage during execution period: .................................................................. 15 III.3.7 Provision and transportation of material ......................................................... 16 IV. MATERIAL ................................................................................................................ 16 IV.1 SAND: ........................................................................................................................ 16 IV.2 STONE: ...................................................................................................................... 17 IV.3 CEMENT: ................................................................................................................... 18 IV.4 REINFORCEMENT: ...................................................................................................... 18 IV.5 WATER: ..................................................................................................................... 18 IV.6 ADDITIVE: ................................................................................................................. 19 V. EXECUTION ORGANIZATION: ............................................................................. 20 V.1 PREPARATION FOR PILE EXECUTION. ........................................................................... 21 V.2 POSITIONING AND ANCHORING FOR BARGE:................................................................. 22 V.3 POSITIONING OF BORED HOLE: .................................................................................... 22 V.4 LOWERING OF CASING: ............................................................................................... 22
CUU LONG CORPORATION FOR INVESTMENT, DEVELOPMENT AND PROJECT MANAGEMENT OF INFRASTRUCTURE (CUU LONG CIPM) VAM CONG BRIDGE CONSTRUCTION PROJECT UNDER CENTRAL MEKONG DELTA REGION CONNECTIVITY PROJECT PACKAGE CW3A CONSTRUCTION METHOD OF VAM CONG BRIDGE FOR BORED PILE WORK – PYLON PY1,PY2 APRIL – 2014 JOINT VENTURE OF GS E&C – HANSHIN E&C GS E&C - HANSHIN E&C JV o0o UNDER CENTRAL MEKONG DELTA REGION CONNECTIVITY PROJECT PROJECT COMPONENT 3A: VAM CONG BRIDGE CONSTRUCTION PROJECT CONSTRUCTION METHOD OF VAM CONG BRIDGE FOR BORED PILE WORK – PYLON PY1,PY2 CONTRACTOR CONSULTANT CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM CONTENT I PROJECT’S GENERAL INFORMATION - - II SUMMARY OF WORK VOLUME - II.1 PYLON PY1: - - II.2 PYLON PY2: - III EQUIPMENT AND MANPOWER FOR EXECUTION - III.1 SUBMITTED CONSTRUCTION EQUIPMENT - III.2 MANPOWER FOR CONSTRUCTION: - 11 III.2.1 Chart of construction organization - 11 - III.2.2 List of Sub-Contractor’s Manpower: - 12 III.3 PREPARATION WORK: - 13 III.3.1 Office staff and worker: - 13 - III.3.2 Material gathering yard: - 13 III.3.3 Protection work: - 14 - III.3.4 Electricity for execution: - 14 III.3.5 Water source: - 15 - IV III.3.6 Drainage during execution period: - 15 - III.3.7 Provision and transportation of material - 16 - MATERIAL - 16 - IV.1 SAND: - 16 IV.2 STONE: - 17 IV.3 CEMENT: - 18 IV.4 REINFORCEMENT: - 18 IV.5 WATER: - 18 IV.6 ADDITIVE: - 19 V EXECUTION ORGANIZATION: - 20 V.1 PREPARATION FOR PILE EXECUTION - 21 V.2 POSITIONING AND ANCHORING FOR BARGE: - 22 V.3 POSITIONING OF BORED HOLE: - 22 V.4 LOWERING OF CASING: - 22 - -1- CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM V.4.1 Positioning of execution: - 22 - V.4.2 Lowering of casing: - 23 - V.5 DEPLOYMENT OF DRILLING OF PILE AND CLEANING OF BOREDHOLE FOR THE FIRST TIME: - 25 - V.6 FABRICATION AND LOWERING OF REINFORCING STEEL CAGE: - 26 V.6.1 Erection of reinforcing steel cage on the fabrication yard: - 27 - V.6.2 Intalling rebar cage into bored hole: - 28 - V.7 BLOWING AND CLEANING OF BOREDHOLE FOR THE SECOND TIME: - 28 V.8 CONCRETE POURING OF PILE: - 29 V.9 CUTTING TEMPORATY CASING AND COMPLETING PILE HEAD: - 31 V.10 CONSTRUCTION ORGANIZATION AND SCHEDULE: - 32 VI QUALITY CONTROL METHOD OF CONTRACTOR - 34 - VI.1 CONSTRUCTION ORGANIZATION - 34 VI.2 QUALITY CONTROL SYSTEM AT SITE - 35 V.2.1 Quality control department: - 35 - VI.2.2 Steps of quality control and acceptance: - 35 - VI.3 ACCEPTANCE OF WORK ITEMS - 38 VI.4 WORKS AND MATERIALS TO BE CHECKED AND ACCEPTED: - 39 VI.5 MATERIAL TESTING - 39 VI.6 METHODS ENSURING FOR CONSTRUCTION PROGRESS - 39 VI.7 STEPS FOR ACCEPTANCE AND COMPLETION - 40 VI.8 LIMITATION MEASURES FOR IMPACT OF DEFECTS AND COUNTERMEASURES OF DEFECTS DURING CONSTRUCTION: - 41 - VII MEASURES OF ENSURING TRAFFIC SAFETY, FIRE PREVENTION, LABOR SAFETY AND ENVIRONMENT SANITATION - 43 VII.1 LABOR SAFETY: - 43 VII.1.2 Citation of normative standards and legal documents on labor safety & environment protection: - 43 VII.1.3 Human resource, policy, safety insurance conditions and improvement measures - 43 VII.1.4 Specific methods: - 45 VII.1.5 Training for workers on labor safety: - 45 - -2- CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM VII.1.6 Establishing Safety Rules on the site: - 46 VII.2 SAFETY FOR EACH CONSTRUCTION WORK - 46 VII.2.1 General method - 46 VII.2.2 Safety in plan organization at onshore fabrication yard: - 47 VII.2.3 Safety in site plan organization at piling area: - 47 VII.2.4 Safety in installing and using construction machines - electricity: - 48 VII.2.5 Safety in reinforcing work: - 50 VII.2.6 Safety in handling and transporting work: - 51 VII.2.7 Fire and explosion protection - 51 VII.2.8 Construction safety in rainy season: - 53 VII.2.9 Environmental protection - 54 VII.2.10 Measures for work protection, security in the area, and social order - 56 VIII CONCLUSION - 58 - -3- CONSTRUCTION METHOD STATEMENT OF BORED PILE I VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM PROJECT’S GENERAL INFORMATION Introduction In the context of technical infrastructure development in all regions The completed work will contribute to shorten the Hau river, reducing traffic congestion, create impetus in the development One of the importand in central Mekong detal connectivity project (CMDCP)-Vietnam.System will create a smooth road traffic, The opening up opportunities for trade goods, create a breakthrough in economic development, culture and society in the Mekong Delta region in particular, between the western provinces to List Ho Chi Minh City and the country in general Vam Cong bridge across the Hau river connects Lap Vo Distric - DongThap province and Thot Not Distric – Can Tho city Start point: Km23+831.06(intersection design project) at LapVo distric Finish point:Km26+800.46(intersection design project ) over 91 highway at Thot Not Distric Total length of bridge: L = 2969.4m Scope and structure: Scope: The Bridge will have permanent design using presstressing reinforced concrete in accordance with standard 22TCN272-05 Design vehicle load: HL93 Design frequency: P =1% Earthquake level: level 8, MSK scale Navigation dimension: B×H = 110×37.5m Bridge cross section: Width of bridge deck Bdeck=24.5m, including: lanes 4x3.5 =14.0m Central median strip 1.5m Mixed lanes 2x3.0 = 6.0 m edge strip 2x1.0 = 2.0m Parapet 2x0.5 = 1.0m Structure: Span arrangement: 39.7+10x40+2x30 + 15x40+210+450+210+24x40+39.7 Total length of bridge: L = 2969.4m -4- CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM Vertical curve diameter of bridge R=400m, vertical slope of bridge approach road in Thot Not Distric-Can Tho city side is i = 2.5 %, in Lap Vo Distric–Dong Thap province side is i =(2.5-3)% Superstructure of bridge: Main span structure:Cable-Stayed Bridge has spans (210+450+210)m from P28 to P29 The 25.8m wide deck consists of two composite girders connected by cross beams, spaced at 4.0m Approach span structure: Use Super-T beam, includes 28 spans in Dong Thap province(from abutment A1 to P28) and 25spans in Can Tho city side (from pier P29 to abutment A2), length of spans which near A1 is 39.7m, near A2 is 39.7 m,lenght of span P11,P12,P13 is 30m and length of other spans is 40m The 24.5m wide span cross section includes 11 beams, arranged by distance between two beams a = 2.2m Beam height H = 1.75m Bridge deck structure: 7cm asphalt concrete Bearing: use pot bearing for main spans and steel plate elastomeric anti-displacement and verticalbearing for approach spans have antidisplacement ang horizontal Expansion joint: tooth of a comb shape (metal and rail) Parapet, drainage pipes, lamp posts are made by hot dipped galvanization steel Substructure: II A1& A2 Abutments is reinforced concrete Pile cap located on 12 reinforced concrete bored-piles with diameter =1.5 m The approach bridge piers: Pier is columns by cast-in-situ reinforced concrete o Type 1:Pile cap located on 10 reinforced concrete boredpiles with diameter =1.5m o Type2 :Pile cap located on 12 reinforced concrete boredpiles with diameter =1.5m Pier PY1 and PY2: the same H variant Pile cap’s dimension is 85x27.5x5 m located on 32 reinforced concrete bored-piles with diameter =2.5 m SUMMARY OF WORK VOLUME II.1 - Pylon PY1: Reinforcing steel cage: type CB400V Steel volume of pile: 124.1 tons Steel volume of 32 piles: 3971 tons -5- CONSTRUCTION METHOD STATEMENT OF BORED PILE - VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM Concrete: compress-resistant concrete type C40 (40N/mm2) Concrete volume of pile: 554.55 m3 Concrete volume of 32 piles: 17425.6 m3 - Casing : Casing D2600, 20mm in thickness, 33 m in length: 32 (casings) II.2 Pylon PY2: - Reinforcing steel cage: type CB400V Steel volume of pile: 126.08 tons Steel volume of 32 piles: 4034.56 tons - Concrete: compress-resistant concrete type C40 (40N/mm2) Concrete volume of pile: 559 m3 Concrete volume of 32 piles: 17.888 m3 - Casing : Casing: D2600 in thickness, 37 m in length: 32 (casings) III EQUIPMENT AND MANPOWER FOR EXECUTION - Because the construction plan of Pylons PY1 and PY2 is located on the Hau River, all construction activities will be arranged on the barge system anchoring at the position of construction at PY1 and PY2 - Contractor will execute with 02 drilling sets at both of pylons PY and PY2 III.1 Submitted construction equipment NO MACHINE CATEGORY DEPAR TMENT QUANTI TY Set 02 Drilling pile D2500 NOTES Drilling machine Crane CS-5000, 500 Tons Machine 01 Lowering casing, and steel cage, Crane 150 Tons Machine 03 Drilling and pouring concrete S600 -6- CONSTRUCTION METHOD STATEMENT OF BORED PILE Crane Barge KH500 120 Tons 3800 Tons VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM Machine No 01 Craning and steel cage fabrication 01 Working place of crane 500 tons and 01 crane 150 T, Servicing for lowering casing and steel cage, pouring concrete Barge 1800 Tons No 02 For 02 cranes of 150 Tons servicing for drilling, lowering casing, pouring concrete Barge 1500 Tons No 02 Storing tank of bentonite and drilling system Barge 650 tons Piece 01 Transporting steel cage and material from the bank Tug boat machine 02 Pulling and removing barge 10 Generator Piece 01 Standby for drilling machine and vibrating hammer 01 Standby for drilling machine and vibrating hammer and electrical system during no electricity 11 Generator for barge 3800T 450 KVA 250 KVA Piece -7- CONSTRUCTION METHOD STATEMENT OF BORED PILE 12 Generator 150 KVA VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM Piece 01 Standby for steel cage fabrication, and no electricity 13 Vibrating hammer 150 KVA, 60KVA Piece 02 Lowering casing and earth floor 14 Air compressor 13kg/cm2 Piece 02 Servicing for drilling machine S600 15 Air compressor 7kg/cm2 Piece 02 Servicing for bolt gun 16 Excavator Komasu PC200 Piece 02 Excavate drilling soil 17 Sand separator Piece 02 Clarify bentonite solution to reuse BE-170 MACHINE, EQUIPMENT FOR FABRICATION AND LOWERING OF STEEL CAGE Steel-bending machine Bending steel D40 Piece 02 Steel-cutting machine Cutting iron D40 Piece 02 Zinc-cutting machine Cutting zinc D3 Piece 02 -8- CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM + Having methods to improve labor conditions for workers: + Reducing heavy manual labor stage; enhancing mechanical construction to improve work efficiency, speed up the progress and ensure construction quality + Preventing and limiting in minimum the dangerous, poisonous factors causing incidents, accident adversely affecting the health or occupational disease - Contractor implements regulations on safety and environment sanitation; prepares labor safety diary and implement fully the mode of statistic, declaration, investigation, and analysis for labor accident reasons & occupational disease (if any) - Workers must meet requirements on age, gender, health, level and qualification of labor safety - All workers must be equipped and used personal protective equipment in accordance with the nature of work, especially the case working in dangerous places such as working at height, at deep hole, potential risks of electrical accidents or fire - Ensuring the facilities to serve the needs of workers as WC, shower room; canteen and shift breaking house, hygienic drinking water, first aid place and emergency vehicles - There is an engineer in charge of labor safety at site and a labor safety officer - Before construction, Contractor must prepare construction method for each work in which labor safety measures must be included These measures will be announced to each worker and may be checked by officer of Contractor regularly (at once the workers finish tool box meeting on safety, they sign on safety records) - All electrical equipment must have a ground wire and strictly follow the rules on the use of electrical equipment and safety of lifting equipment Inspection and acceptance of equipment on safety instructions must be carried out before using machine - 44 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM VII.1.4 Specific methods: In order to safety for this work, Contractor will implement the followings: + Through the support of Employer, Supervision Consultant conducts to inspect the status of work to be constructed, the adjacent works to be constructed, foundation structure of such works and adjacent constructed works to take the preventive technical plan for submitting to Employer + Carry out surveying and taking photos, determining the parameters of neighboring buildings such as road, electricity and water , then making planfor reasonable solution and protection + In case of unexpected obstacles, any incident in process of constructing underground works, Contractor will stop working and report to Employer, Supervision Consultant and authorities for solution + Before construction, the barrier will be erected to prevent workers and equipments beyond the scope of safety regulations Also, t system of signboard will be arranged to notify safe distance to such work + Do not place material near wall area or foundation footing or place long materials on structures, not tie to fix scaffolding, equipment, etc in construction process + Arranging construction equipment according to safety regulations, especially in mechanical equipment such as car, heavy & height equipment (crane, bored pile machine ) VII.1.5 Training for workers on labor safety: Contractor arranges an officer in charge of labor safety at site who is responsible for monitoring the labor safety in site All officers, workers must learn about labor safety; depending on common work or every months/ time Signboard, rules must be placed in a prominent location Medical examination of workers shall be done before coming to works The workers must ensure health, especially workers working at height Organizing the safety - 45 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM system at the site and site medical There are rules and supervision to ensure that workers must mandatorily use labor protection equipment VII.1.6 Establishing Safety Rules on the site: - All participants on the construction site must deliver ID cards and show the security guards when come in or out the site - Maintaining the temporary fence, net to separate the site with surrounding area Installing site signboards, safety rules and slogan - All workers working at site are trained labor safety regulation regularly and periodically Wearing helmet, protective clothing, shoes during working and wearing goggles when necessary - Strictly follow the periodic health examination, protection work and labor safety - During construction period, workers must be equipped fully with labor protective equipment such as shoes, clothing, helmet and safety harness - In the time working at site, all staff are not allowed drinking beer, smoking, or using any stimulants causing stress - There are emergency medicine cabinet, table of necessary phone numbers as emergency, police and fire, etc Site Manager shall contract with hospitals of city on transportation and emergency at site - No allow people who not have the duty come in the site VII.2 Safety for each construction work VII.2.1 General method - Establish and implement Labor safety plan for the work which is an organic part of the general economic- technical plan of the company including: + Regular training, education, slogan, signboards, restriction boards, and signposts –according to the forms specified by the Company - 46 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM + Make records to monitor supply of personnel protection equipment, labor safety cards, and access cards + The minimum protection includes helmet and protective shoes Workers without helmet and protective shoes are not allowed to enter the construction site + Regular health examination and non-scheduled examination when the personnel are appointed to work at high place, deep place, or hazardous work - Each worker must sign to confirm their responsibility for the contents above The monitoring records are compulsory at all subordinate departments VII.2.2 Safety in plan organization at onshore fabrication yard: The yard has access gate available for vehicle lanes with barrier and security guards presented 24h/24h There is sufficient design of yard organization, internal road for material transporting vehicles, specifying quantity for each material yard The material yards must have water reservoir to prevent dust in sunny weather Have sufficient commitment with material providers ensuring safe traffic; only provide bulk materials at night to ensure general safety for the Employer and surrounding area Design the general site plan to organize the lifting equipment, electric equipment, and accomodations reasonably Electric line system must ensure the technical requirements VII.2.3 Safety in site plan organization at piling area: The piling area is located at the middle of the Hau River, the construction works are implemented on the specialized barge system, and the construction site plan is narrow The contractor pays special attention to the safety of on water work: All the barges must have protection balcony All personnel and workers working on the barges at the piling area must wear life-jacket - 47 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM The work platforms and construction platforms must have balcony at least 90 cm high There are sufficient signboards at machine positions, and signal man at each machine position There are sufficient indicator lamps and illuminators at night for each working area Design the general site plan; organize the lifting equipment, electric equipment, and electric wire system, ensuring the technical requirements There are sufficient signal posts for waterway traffic directional distribution for ships and boats passing the construction position on day and at night VII.2.4 Safety in installing and using construction machines - electricity: Construction machines and electricity are two issues which support each other during the construction Good and synchronous operation between construction electricity and machines is the basis for labor safety in machinery use and installation To ensure the objective above, our company only uses the machines and equipment that: + Have sufficient machinery documents (Including certificate of calibration) + Good condition + Have professional operators + Install the machines in accordance with site plan arrangement design and work progress - Hereunder are safety measures for installation and use of some basic machines and equipment a For hoisting crane: Only authorized person is allowed to operate the crane and other working machines - 48 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM The operator must not drag the lifting object when it is up, moved and put it down Do not adjust the hook when the lifting object is up While lifting the crane boom or loading, the operator must observe the crane boom or load that they must not be lifted out of the boom range and allowable lifting height Only lift and turn the load when there is no person standing in the working range of the crane Place the hook carefully so that the cables will not be distorted At maximum load: First try lifting the object up at 200-300 mm to decide working capability of the crane and breaks, then continue the lifting work While lifting objects, the distance between the hook and the rope block must be longer than 0.3m If the cables are deviated from the winch or rope block, distorted, broken, or damaged, the operator must stop the work immediately Do not make paracaccommodatione brake while turning the crane with load Do not use the lifting hook to drag the objects on the ground; not lift imbricate objects Do not lift any object with man standing on it, or use hand to balance the weight When turning the crane, prevent counterweight touching the building, or scaffolding b Steel fabrication machine: Only specialized operators are allowed to use the steel cutting, bending, and welding machines - 49 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM Design the cover and protection box when cutting the steel bar which is < 30 cm long When repairing the cutter, disconnect the machines from electric source and arrange one watching person at the circuit breaker Welding machines must have cover and casing, and put in dry place, the welding rod must connect firmly to avoid damage and to ensure safety Welders must wear flameproof clothing, and standard welding goggles c Other machines: Other machines such as: Portable steel cutting machines and welding machines shall comply with the machine operation process, the operators must understand the operation steps, not use the machines in unsafe conditions The system of sockets and circuit breakers must be arranged reasonably which is convenient for connection when these machines are moved in the site plan After the work hours, these machines must be put in the warehouse to avoid damage and to ensure the safe operation When using machines with hazardous substances, the workers must wear labor protection clothing to prevent chemical dust VII.2.5 Safety in reinforcing work: The workers who use cutting, bending, and welding machines must have expertise and labor safety certificate When cutting steel bar which is < 80cm long, protection casing must be available Do not lay the electric wire or the welding wire on the platform during the reinforcing work The steel fabrication yard must be tidy, with brackets for each type of steel, ensure convenience for travelling on the platform - 50 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM VII.2.6 Safety in handling and transporting work: Workers while handling materials must wear protection gloves and helmet When the handling work is at high positions, safety shall be paid special attention to and protected by protective measures such as safety belt and safety nets in addition; the materials must be attached tidily and firmly There is regulation and commitment with material providers to ensure traffic safety in the site plan and on the public road, check driving license of drivers for bulk materials, check the car lighters and horns cover bulk materials; comply with road safety traffic regulations There is water jet at the gate to clean soil and mud from the trucks and cars in order to ensure safe traffic for the people Steel and iron items are bundled and lifted by crane There is one team of operators in charge of lifting and handling work, who are trained about handling work VII.2.7 Fire and explosion protection a Fire and explosion protection standards The fire and explosion protection work complies with the standards as follows: TCVN 3254:1989: Fire protection General requirements TCVN 3255:1986: Explosion protection General requirements b Fire protection measures - The Site Manager is responsible before the General Director and the Law for safety conditions in the site plan - Establish the fire prevention and fighting team Members of the team are the construction workers This team is trained about basic operation in fire prevention and - 51 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM fighting (The training courses are instructed by professional fire prevention and fighting force) - Before the construction, the Site Management department and representative of the Contractor discuss with the Project management Board about protection work for materials and equipment as well as fire prevention and fighting - The Contractor will provide and install fire extinguishers at site office, warehouse, and dangerous positions such as welding machine and gas cutter position - Fire extinguishers and fire hydrants are placed at flammable positions in accordance with the design - The workers must not bring firecrackers or flammable substances into the site, not cook on the site - At the site office, telephone number of the Fire police should be available for communication when fire occurs - Do not use the electricity over capacity - Do not bring explosive and flammable substances into the site plan - Comply with regulations on fire prevention and fighting - Regular inspection and supervision to check the compliance of fire prevention and fighting work c Regulations on fire prevention and fighting: - In construction, fire & explosion prevention is very important, therefore, the personnel and workers must observe the following regulations when accessing the site plan: + Do not bring explosive and flammable substances into the site plan + Do not use fire or smoke in the area with “no fire” and “No smoking” boards - 52 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM + Use electric equipment in accordance with electric safety rules Each zone has specific circuit breaker, disconnect the circuit breaker after the work hours + Before, during and after welding work, the worker must check and cover the welding position, especially in flammable area, there must be one watch man during the welding work and check the area carefully before finishing the work + Flammable materials must be insulated and arranged in accordance with the regulations, the warehouse keeper must always remind people of fire protection when they take materials or supplies to and from this area + All personnel and workers when accessing the site must always are aware of fire prevention If they recognize fire, they must notify the leaders and other workers, at the same time, use the existing tools to stop the fire + Do not use the fire protection equipment for other purposes + Personnel and workers who implement the regulations well will be rewarded; violating workers must be subject to sanction or punishment in accordance with the law VII.2.8 Construction safety in rainy season: The Contractor establishes the Management board for flood storm at the work Mak regulations to coordinate among the Employer, Consultant and the construction department, and between the Management board for flood storm prevention and fighting and the workers at the site when disaster occurs - The barge is anchored safely near the shore - The electric equipment is disconnected immediately - Lifting equipment such as cranes and piling machines are fixed safely - The workers are evacuated to a safe place - 53 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM - There are sufficient covers for materials and supplies on the site - Suspend all activities on the site when there is rain and storm - Report to the Employer, Consultant, and to the Company about damages caused by flood and storm and carry out corrective measures immediately to continue the construction after the storm and flood ends - Clean the entire site plan, accomodation, and pathways inside and outside the site VII.2.9 Environmental protection a Ensure the safety for surrounding environment - Ensure the hygiene and safety for surrounding environment near the site - Because the construction is required to ensure normal operation of adjacent areas, the industrial hygiene and environment is the most important issue It is necessary to ensure the environmental hygiene, avoid dust, and industrial waste as well as noise b Establish environmental protection measures: - This is a Works of big scale and long-term construction, The Contractor will comply with recommendations of environmental protection agencies, the Employer, and Consultant about the environmental protection c Basic measures: - During the construction, it should pay special attention to the environmental protection, not cause dust and noise influence - To ensure the requirement above, the Contractor will implement the following tasks: + Regularly check the safety standards of construction equipment and machinery All trucks must have canvas cover and avoid rush hours - 54 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM + To ensure that the trucks are clean when they leave the site, the trucks must pass through the car washing bridge The waste water will drain off to the general sewerage system + Arrange bins on the site and disposed daily + Conduct watering regularly to avoid dust, especially in dry season or high density of construction + There is enough hose for washing Create open working environment, enough light and little dust, no noise to protect the health of construction workers + Use technical measures to shield the noise emitting machines such as the generators to reduce the noise to allowable level + Comply with working time at the request of the Employer In case of construction at night, the contractor will make specific plan to report to the Employer to obtain the general coordination plan Then, there must be sufficient facilities and equipment with sufficient light and little noise + Arrange staffs, assign responsibilities of organization and education, regularly remind, check, reward, and apply sanction with respect of good performance and faults d General requirements: - The site hygiene as well as hygiene in surrounding area is responsibility of any Contractor in any project Besides, this work is located in the urban area, residential area, with many institutions and organization; therefore, the site hygiene requires more attention e Implementation measures: - Arrange everything tidily in accordance with the total site plan At the end of the day, clean and remove them out - 55 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM - Waste and rejected items are collected and disposed by the close method which does not cause dust and noise Before transporting, the wastes are watered The waste trucks are covered with canvas cover carefully and go in and out of the site after the working hours, to minimize any impact to the surrounding areas - Domestic wastes are disposed in the day Construction wastes are gathered into one position in the site, then disposed to dump site according to regulations of the city - Waste water passes through the mud deposition system and discharged to the drainage system - Industrial hygiene is conducted regularly, before cleaning the site, water the site to avoid dust At the end of a working day, all workers must clean their work place Clean the work place every day Organize weekly cleaning and monthly cleaning routine; arrange the warehouse and tents of materials and vehicle tidily - Make reasonable and clean drainage system and production water system; ensure that the construction site is always dry, clean, tidy, and neat - Therefore, in addition to the purposes of ensuring the quality, technical and artistic requirements, the Contractor also commits to ensure environmental protection requirements and consider this work as a key project among the construction works in the urban area + Solid Waste Treatment Measures: domestic and construction solid wastes are gathered and disposed to specified place in the city VII.2.10 Measures for work protection, security in the area, and social order a Protection system: - The security work on the site is implemented by the Team of security guards in shifts 24hour/day who are responsible for ensuring the security for the entire construction area, the project Management board, construction teams, detecting unauthorized people access the construction site to ensure the safety of the completed work items, preserving, and maintaining supplies and construction equipment, avoid damage and loss - 56 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM b Security management measures for staffs and workers on the site: - Establish the detailed regulations on the construction site and announce to all staffs and workers involved in the construction (There are regulation table on the site) - Manage the human resources on the site: Issue access cards (distinguish between officers, workers, and other contractors with different colors on the cards) - For employees who have labor contracts: Officers and employees working at the site must comply with the regulations - For other contractors: Only those who are authorized and permitted by the Site Manager could access the site, and they have to comply with the site regulations - Divide the working zones: Distinguish the scope of operation for the worker teams under supervision of the construction engineer to avoid disordered situation on the site - Demographic management with local authorities: All staffs, workers, and guards on the site must have temporary registration with the local authority in accordance with the state provisions - 57 - CONSTRUCTION METHOD STATEMENT OF BORED PILE VAM CONG BRIDGE CONSTRUCTION CENTRAL MEKONG DETAL REGION CONNECTIVITY PROJECT (CMDRCP)-VIETNAM VIII CONCLUSION The Contractor believes that our construction method are established on the basis of the survey, analysis, assessment of site plan, current situation, and technical requirements; we will complete the work ensuring the best quality with the most feasible construction progress During the construction, the Contractor will always try to apply the most advance technologies to promote the ideas and technical improvements in order to enhance the technical quality, safety, and construction progress required by the Employer We believe that, with our present capability in terms of labor, equipment, construction machinery, as well as staffs, workers with high qualification, who are enthusiastic and creative, and strong financial capacity, we have sufficient capability to implement the bored piles for the Project: Vam Cong Bridge Construction Project under Central Mekong Delta Region Connectivity Project – Viet Nam, ensuring high quality, appropriate price, progress, technical requirements, and state construction standards for basic construction - 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