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METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 DESCRIPTION OF DETAILED CONSTRUCTION PLAN CONSTRUCTION ITEM: IMPROVEMENT OF LY BRIDGE, KM225+170 of Construction Package - CP2 PROJECT: IMPROVE AND UPGRADE YEN VIEN – LAO CAI RAILWAY PART BASIS OF THE CONSTRUCTION PLAN PART CHARACTERISTICS OF THE CONSTRUCTION WORK PART GENERAL METHOD OF CONSTRUCTION PART DETAILED METHOD OF CONSTRUCTION PART CONTRACT PACKAGE IMPLEMENTATION SCHEDULE PART CONCLUSION METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 PART BASIS OF THE CONSTRUCTION PLAN Basis: - Pursuant to the Decision No 2742/Q§-BGTVT of Ministry of Tranport dated September 10 2007 on approving the project: Yen Vien – Lao Cai Railway Upgrading Project under Kun Ming – Hai Phong transport corridor in which including Ly Bridge, section Km225+170 - Pursuant to bid documents of CP2 package: Improve, upgrade Yen Vien - Lao Cai railway - Pursuant to the approved Shop Drawing designed by Construction Joint Stock - Pursuant to Subcontractor Contract No NKSP-VN-CP2-017 dated 02/04/2012 between Namkwang - Sampyo JVC and Road and Bridge Engineering and Mechanical JSC - Pursuant to the competence and experience of Bridge Engineering and Mechanical JSC - Pursuant to applicable procedures, standards on construction, and the fact of construction site Hereafter shall be the complete and detailed construction plan provided by Bridge Engineering and Mechanical JSC METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 PART CHARACTERISTICS OF THE CONSTRUCTION WORK I VỊ LOCATION, PURPOSE AND IMPROVEMENT REQUEST, SIZE OF LY BRIDGE: 1.1 Location, purpose and improvement request, size: 1.1.1 Location: - Ly Bridge is located in Yen Vien – Lao Cai Railway in Lang Thip Commune, Van Yen District, Yen Bai Province Actual chainage of this bridge is Km224+813.93 1.1.2 Purpose and improvement request: - Purpose: Upgrading the existing bridge of Sung which is downgraded - Request: Assure the training operation and drainage 1.1.3 Construction items: - Repair existing abutment - Replace existing girder by new composite girder, using concrete sleeper with ballasted - Adjust longitudinal section, reinforce slope, cone and bridge approach 1.2 Location, altitude: - Based on the location of Yen Vien - Lao Cai railway - Coordinates, benchmarks: making use of national coordinate system II CURRENT SITUATION: 2.1 Characteristic of plan and longitudinal section: - Ly Bridge is located in Yen Vien – Lao Cai Railway in Lang Thip Commune, Van Yen District, Yen Bai Province - The bridge is on straight and flat alignment 2.2 Geological characteristic: - From elevation 64.15 – 59.65m: Masonry, its hardness is IV-VI class, TCR=20% Rnk = 90 Kg/cm2 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 - From 59.45 – 56.85m: G¬ nai rocks weathered by wind and water,gray brown, gray yellow its hardness is IV - From 56.85 – 54.75m: G¬ nai rocks weathered by wind and water, break the same Macadam, gray brown, its hardness is VI 2.3 Hydrological characteristic: - The highest flood in 1971: 72.93m - The second highest flood in 2008: 66.09m - The third highest flood in 1986: 64.52m - The Hydrological calculation for Ly bridge + Q1% = 223.40m3/s + V1% = 2.39m/s + H1% = 71.34m + L cần thiết = 14.50m 2.4 Current characteristic: - Existing girder is double steel I-profile 170x545x15mm - Drainage width Lo = 15.88m - Load weight: 4.2T/m - Telecom-cable is placed on bridge, attached to the girder 2.5 Applicable Technical Specifications: - The bridge is designed for single rail gauge 1000mm - Designed load weight T14 for all of the abutment and beam - Designed rate: H=1% - The upper structure uses rail P50 2.6 Applicable regulations: - Regulations on Technical design of rail gauge 1000mm enclosed with the Decision No 435/QĐ-KT4 dated 09 February 1976 of Ministry of Transport - Standard 22TCN18-79 of the Minstry of Transport on Culvert Design - Technical Specification No 22TCN340-05 on Railway exploitation enclosed with the Decision No.76/2005 QD-BGTVT dated 30 December 2005 of the Minstry of Transport METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 - Specifications of repair of railway infrustructure enclosed with the Decision 173/QDGTVT dated 25 February 2000 of the Minister of Minstry of Transport - Standard 22TCN 171-87- Specifications for Geological Survey and Design of Roadbed Stabilization in area with slippage and erosion - Standard 22TCN 342-05/2006 enclosed with the Decision 75/2005/QD-BGTVT dated 30 December 2006 of the Minstry of Transport - Other related regulations III CONTENT OF DESIGN: 3.1 Abutment: - Repair abutments, including abutment head, padstone, retaining wall, sidewalk with concrete and reinforcement - The grade of concrete for abutment is 250, padstone grade is 300 - Reinforced bar types are CI, CII 3.2 Span structure: Replace the existing span structure with reinforced concrete beam below ballast aqueduct, pre-stressed concrete sleeper Basic dimension as below: - Caculated length Lp = 16.80m - Total length L = 17.50m - Main Girder height H = 1.472m - Beam structure height H = 1.015m - Gap of center-to-center of girders B = 4.60m - Supporting height - Types of reinforcement are CI, CII H = 0.158m 3.3 Bridge approach and other tasks: - Adjust the longtitudinal section along the bridge according to longgitudinal section document, repair slope behind at ends of abutments and keep the cone intact - Build bew cut-off dike, ruler, slope protection of bridge approach with ashlar and mortar within the area of 25 meters behind Yen Vien and Lao Cai abutments METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 PART GENERAL METHOD OF CONSTRUCTION I OBJECTIVES - Complete the constrution work within the schedule and in accordance with the requirements of bidding documents - Assure the conformance of the construction work with quality and technical requirements, procedures, norms and standards as designed - Assure the absolute safety in operating train and environmental hygiene; reduce the impact on daily life of the resident during construction - Assure the absolute safety for human and machinery during construction II DIVISION OF CONSTRUCTION SEGMENT: - Based on the actual construction quantity of Ly bridge - Based on the capacity and experiences of the Main Contractor and Sub-contractors involved in the awarded joint venture who have been approve by the Employer We, the Contractor, shall mobilize a construction team to complete all items of Thuy Loi Bridge Improvement as following: + Bridge items + Supperstructure + Bridge approach III PERSONNEL ASSIGNMENT: Organising the construction site: * The Board of Management Unit consists of: - Project manager: Being responsible for managing all activities on the site, being the legal representative to resolve any problem relating to the project - Members of the board: Being assigned by the board of management and responsible for their assigned tasks, including: + Chief leader of the site shall make a detailed construction plan according to the progress, directly manage the manufacturing and constructing process at the site He/She METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 shall take responsibilities in front of the manager for the construction progress, quality and labour safety + Technical leader shall directly manage the construction work, work on behalf of the chief leader in case of his/her absence He/She shall take responsibility in front of the Chief leader for all construction operations at the site Based on the detailed construction plan which has been approved, the technical leader shall assign daily manufacturing tasks to corresponding teams He/She shall check and speed up all specialized operations and functions of each team as assigned, coordinate with off-site teams to solve any procedures relating to the site + Progress management team: this team has a progress manager who is in charge of checking the progress, speeding up and reminding construction teams, and making immediate report to the Chief leader or the Technical leader in case of delay or standstill + Technical management team: Shall follow up the construction teams, work and monitor directly the construction process to ensure the compliance with approved design document Everyday, technical engineers are responsible for monitoring the work, logging job record for all construction items so as to create a basis for the payment and as-built document + Finance and accounting team includes: Accountant, finance staff: Shall be responsible for any payment and settlement of the construction work Administrative staff: Shall be responsible for checking, monitoring labour protection at the site, communicating knowledge of labour safety and empowering the labourer working at the site with protective measures, such as protective clothes, shoes, helmets, etc + Quality management team includes: Technical management and construction supervision team: shall be responsible for checking, monitoring the construction process in accordance with the approved design document and as-built drawing; monitoring the operation safety and labour safety of all manufacturing units to ensure the compliance of construction work with approved design document; strictly following all procedures and standards during execution After completing each construction item, the contractor itself shall conduct an acceptance inspection and document any existing problem After fixing such problems, the Supervisor shall be invited to take acceptance test for the item Material management team: Shall be responsible for delivery of materials to the site in a timely manner and following the schedule In addition, the material METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 management team shall be responsible for storing, maintaining and monitoring the quality of materials as in approved specifications + Equipment management team: Shall be directly responsible for the safety of machinery and equipments; Must ensure that such machinery and equipments shall be supplied sufficiently and timely for execution; Must quickly repair and fix any problem relating to machinery and equipments + Safety management team: Because the construction is executed on running railway, the contractor must pay special attention to the safety of operation The staff in charge of safety shall be responsible for communicating all knowledge relating to the safety of operation, essential procedures and standards for each construction team Everyday, the staff in charge of operation safety and labour safety shall be responsible for checking safety assurance procedure at the construction site + Security management team: Shall be responsible for ensuring security at the site, checking and guarding all kinds of materials, machinery and equipments available at the site The security of each construction team is assigned to 2-3 personnel who are also in charge of the security for the whole construction work + Environmental management team: Shall be responsible for communicating knowledge of environmental hygiene, checking and monitoring the implementation of hygiene and environment protection at the site + Fire and explosion prevention and protection team: Shall be responsible for communicating knowledge of fire and explosion prevention and protection, ensuring safety for the construction work without fire and explosion + Construction teams: Including multiple construction units which shall execute each separate construction item or on different location Each construction unit shall be managed by one leader who has skills and experiences METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 Arranging personnel to execute construction items of Ly bridge - Based on the construction volume, we shall arrange suitable personnel, machinery and equipments to ensure the whole progress of the construction package and of each stage (within the scope of execution) with one construction team The total number of workers to mobilize at each specific time and for each specific requirement during construction is 30 people: - The estimated time for completing this construction package is within 90 days, from the effective date of contract to the handing-over date During such time, the personnel must be arranged properly to execute multiple construction items at the same time LIST OF KEY ENGINEERS INVOLVED IN CONSTRUCTION SITE NUMBER OF WORKERS INVOLVED IN CONSTRUCTION N o Name Position Le Quang Duy Genaral operating Trinh Van Toan Technical staf Duong Vinh Thiep Technical staf Pham Duc Thanh Foreman Le Dang Kim Notes Safety Number of workers Grade 1/7 to grade 3/7 Grade 4/7 to grade 7/7 Provider 30 10 20 Contractor Total of workers involved in construction are 30 workers METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 III THE CONTENT OF GENERAL CONSTRUCTION PLAN: The whole construction work shall be executed by manual work and machinery In order to ensure the absolute safety for construction and reduce impact on the station operation, the construction unit must conduct their work properly and neatly; all materials, machinery and equipments must be gathered outside the railway restricted area to eliminate any impact on train operation Wasted soil must be gathered and transported to specified location for dumping Construction steps are as followings: Preparation: - Prepare workers’ hut and housing - Prepare human resource, construction machinery and equipments - Survey of Shop drawing and preparation for construction procedures - Construction of the temporary pier, beam for banding rail, steel bars Construction: - A construction team shall be mobilized for these following items: + Repair abutment head + Contruct bridge approach + Contruct supperstructure + Construct cut-off dike, slope and cone of abutments Completion, Check, Acceptance and Hand-over: Resolve the problems, clean the construction site Hand over the old materials to the Management Unit Complete the required necessary formalities in order to check and accept and bring into service 10 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 - Contact the management departments of the structures in the work site for solving problems in the construction process - Contact with the waste department for disposing wastes IV DETAIL OF CONSTRUCTION ORGANZATION Preparation - Use theodolite,steel rule, and wood pole to locate the position of the bridge Use surveyor level to measure the level of construction Gather construction materials, equipment and machines Construct the access from the road to the bridge Remove the optical cables out of the construction site Prepare the site hut, transport the construction materials and equipment to the work site - Make the beams for banding rail and bearing force + Beam for bearing force: beam 3I550-4.0m long and 5.0m long, including 02 beams (old beams) + Beam for bearing force: beam 3I550-7.0m long, including 02 beams (new beams) + Beam for banding rail: 5.0m long and include 02 beams - Make the V-shaped steel cage to brace rock gabion of temporary pier Plan for speed restriction and section blockade during construction: - 15km/h speed restriction: Apply for speed restriction in 40 days; - Section blockade: apply for time: + In hours for installing new beam, disassembling the beams for banding rail, and constructing the upper structure Construction work: 3.1 Install the temporary platform, beam for banding rail, potential well: - Position: the temporary pier system for installing the beam for bearing force will be at the upper part and lower part of the culvert The center of the temporary pier system at the upper part will be 7.00m from the center of the current railway At the lower part, it is 6.00m from the center of the current railway The detail of installation will be as below: 18 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 + Install temporary pole, platform: skim the soil and tamp the soil at the position of the temporary pole until it reaches the designed level Install the V-shaped steel cage, lay ballast, fill the steel ashlar gabion, install cribwork 14x16x220, 2I350 beams and Pale Install the new beam at the lower part, remove the old beam at the upper part The temporary platform is installed in the bridge center in front of the abutments + Construct the potential well at the upper and lower of bridge for bearing capstan and tirfor + Install the beam for banding rail at the abutment + The construction is carried out in the speed restriction 15km/h + Complete the temporary poles and platform and to be checked before carrying out the follow-up steps - In order to step up the construction progress and maintain the quality as well, the contractor shall use machines to the main tasks Workers shall the tasks which are not main or that cannot be done by the machines 3.2 Repair abutment head: - Remove the old steel beam of the abutment and add the vertical and horizontal connection system - Pass through the support, insert the wooden plate to support the existing steel beam - Remove the cribwork, install the beam for banding rail - Excavate the soil below the beam for banding rail - After that, we shall inspect the temporary structure and monitor the train operation through the structure for times in order to assure the safety - Remove the old concrete at both sides of the abutment including: ballast wall, abutment head, padstone, part of wing wall and abutment body - Increase the connection between the new concrete and old concrete - Install the reinforcing bar and formwork for the abutment - As the concrete reaches 80% of the intensity R28, the formwork shall be disassembled - Install the reinforcing bar, padstone, and formwork according to the design - Notes when repairing abutment head: + Reinforcement installation complies with the design, installation of workform must be close and flat 19 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 + Concreting with concrete mixer according to the design During the process, concrete shall be tamped + The formwork shall be monitored during the concreting process If formwork is deformed, stop concreting + Maintain concrete during the construction process + The material, machine shall be out of the track gauge and guarded 3.3 Construction of span structure: - The main beam are manufactured and tested in the factory Transport seperated part to the construction site and stored there and then installed in succession The parts of main beam shall be installed manually at the upper Notes for the connections with the concrete layers: the drilled holes, connecting rivets Paint all beams after finishing the installation - Install the sleepers for supporting the beam - Install new steel beam on the platform at the lower - Put together each of part which is reinforced in order and ensure: + The parts shall be installed as deisgned + Steel parts shall be flat and undeformed - The Supervision Consultant shall check and accept the installation of steel girder first, next installation shall be continued - When finishing the installation of new steel girder the completion shall be done - Install workform, reinforcement, supporting equipment: drainage pipes, located parts and ensure: + Installation of reinforcement complies with the design + The workform is close, flat and undeformed - The Supervision Consultant shall check and accept the workform and reinforcement first and then carry out next item - When the beam meets requirements of intensity, the completion of girder shall be done: construcion of anti-penetration layer, steel concrete network - The Supervision Consultant shall check and accept the workform and reinforcement first and then construct next item 20 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 - Construction of water protection layer: Water protection layer shall constructed after casting days Remove the cover, clean the concrete surface and dry it before constructing anti-penetration layer Install drainage pipes and then spraying the anti-penetration in accordance with standard 0,2 litre per m², install steel net D2, cement mortar M100 with 4cm thick When the surface of mortar hardens cover it with the jute bags and spray water in at least 14 days - Notes for construction of span structure: + The installation and connection of the parts shall compy with the design and in order avoiding the errors and wrong position + Check carrfully and exactly the parts, mark the parts in order before putting together + Reinfocement structure shall meet requirements of intensity and quality + Quality of paint and its thickness shall fulfill requirements of the specifications of the project + Install the reinforcement as designed, put together the formwork, padstone closely and flatly + Casting by concrete mixer as designed rate During the casting use the needle vibrator to tamp concrete, ensure the intensity and quality of new concrete and the connection with the existing concrete as well + Keep an eye on workform during casting, If formwork is deformed, stop concreting After having treated, the casting will continue and ensure the connection of concrete among casting + Maintain concrete during the construction process After casting, cover the concrete surface with jute bags, spray water in 14 days After that remove the sides of formwork, keep the steel side + The material, machine will be out of the track gauge and guarded 4.4 Brace the slope, cone: - Excavate the slope and cone according to design - Excavate the cutoff dike and build the cutoff dike with ashlar 21 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 - Construct K95 road bed + Fill each soil layer with 15cm thick, then tamp + Ask engineer to inspect and accept the work - Lay ballast, construct the slope and cone with ashlar • Ashlar work: * Before construction of ashlar, it shall meet requirements as following: Design the mortar components, test the construction stone and then submit the test report on the mortar and stone to the Engineer for checking The construction shall be continued when the Engineer has no objection on such test report For ashlar: Shape and dimension of ashlar shall be processed by hand so that it meet requirements of actual construction * Requirements of masonry work: - Select the stone which are flat and equal to fill at the top side and then pointing - Completed surface of cone and slope shall be flat and equal The Construction shall be met requirements of flatness, height and inclination - Construction of cone and slope shall meet requirements of good looking as designed When constructing the flat side of stone shall be outside The check and acceptance work shall be carried out by the Supervison Consultant and made a minutes of check and acceptance to control quality in the fufure * Drainage holes: All slopes shall have drainge holes These holes shall be in the lowest points where water can be drained freely The distance between the holes, specifications and design of the holes comply with the detailed drawing or the instructions of Supervision Consultant - Adjust the longitudinal section of bridge approach 3.5 Place the new beam onto the designed position: - The day before placing the new beam, the designed position and construction equipment have to be examined carefully - Blockade - Remove the upper structure and beam of banding rail and lifting the existing beam, install the position on the new abutment head and padstone - Move the existing beam to the supporting system in the upper 22 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 - Pull the new beam from the supporting system in the lower a Remove the upper structure - Remove rail, sleeper on the bridge and the road belong to the bridge area - Remove the beam for banding rail b The horizontal screen of new beam: - Roller (component for horizontal screen) - Place 5T capstan at the lower roller path Place 5T tirfor at the upper roller path - Each side will have a cable system The cable type is 6x19+1, diameter of 19mm c Measure for placing beam - Lift beam + There will be jacks and back-up jacks at both ends of the beam The jack will be inspected and have same quality + Assign experienced workers + There will be at least position for each jack to rest on + there will be at least position for each jack to rest on The position must be firm There must be various nogs with different thickness For each position there are nogs those are 60cm long + The jack must be placed firmly on the concrete supporting and vertically with the coated bar + In one turn, only one end of the beam will be lifted 10cm + During lifting beam, no workers is allowed to construct on the beam, no vibration made on the beam + There will be jacks with same quality being placed symmetrically along the beam + As the beam lifted high enough, put the slide under the beam then prepare to pull the beam - Move the existing beam to the upper by the capstan - Pull beam 23 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 + Assign experienced workers to control the capstan The workers must be in good condition + There will be personnel to monitor the move of the beam + If the beam is not on the right path, the site committee must be informed + As the beam comes close to the designed position (the remaining distance is less than 50cm), the speed of the beam will reduce slowly and be pulled 2-5cm for each turn of pulling + The slide will be stopped so the beam can be placed + Complete placing the beam 3.6 Complete the upper structure: - Lay ballast: ballasts are transported by trains to work site and laid on the bridge and add to the bridge approach - Install new prestressed concrete sleeper, rail P50 and fastening accessories: rails and sleepers are transported by trains to the work site - Add stone, adjust road: + Arrange rails, adjust gaps: use measure tools to inspect rails before adjusting rail gaps The line between the connection is not bigger than 20mm, the curve line is not bigger than a half of shorted value The connection will be tightened soon after arranging rail + Adjust the distance, complete the direction + Complete the ballast layer Collect the ballasts staying at the road shoulder + Inspect all of the work before the operation of train - During the construction process, material, machine will stay out of the track gauge and be guarded 3.7 Completion: - Reinstall the optical cable in the original position -Remove the old beam, platform, temporary pole, beam for banding rail - Collect the materials, equipment and clean the watercourse - Gather the materials and store in the storage 24 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 Construction quality control measures - After finishing each item, we will ask engineer to inspect and acceptance and make minutes of each of items - Supplement the maintenance and warranty for the construction accordingly with the law - Unqualified materials will not be allowed to use for construction - Testing and inspection activity will be conducted according to the design document - The inspector can inspect any work item - After the Engineer signs the acceptance minute, we will move to other items Completion, check, acceptance and hand-over: - After finishing each item, we shall request the Engineer to check and accept that item The follow-up items shall be construct when the Engineer has accepted - Finish all of the procedures so that the work will be brought into service V LABOR SAFETY MEASURES Measure for train operation safety * General measure: + Workers at the work site shall follow labour safety regulation, train operation regulation of VNR: +At work sites, there shall be safety supervisors for informing people about train operation safety + There shall be warning signs at both ends of the site + The telecommunication railway shall not be affected during the construction + The structures outside the track gauge must be firm and not be destroyed by storm in order to avoid affecting the train operation safety + The work items which require section blockade must be constructed only when the blockade order is ready + Assign personnel, material according to decision 1578/1999/QĐ-BGTVT + Material shall be placed out of the track gauge + In case of storm, flood, there shall be personnel to monitor and handle the effect of the weather If the effect cannot be managed, train operation may be stopped + Workers shall be educated about railway regulation including decision 187 QDDSVN 25 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 + There shall be personnel to inform people about train operation safety + The guard personnel shall be trained and equipped sufficient tools + The contractor shall follow the regulation of VNR + There shall be personnel at station to report the train operation schedule + Create site regulation and place regulation at suitable positions at site + Create slogan for labour safety + Follow the decision 1632/ DS-CSHT + The safety department inform workers of labour safety * Measures for train operation safety for each activity: + Material releasing and arranging activity: assign manager for the activity The release of material must be conducted evenly Do not put material in the track gauge The waste soil must be disposed at designed position; + Transportation activity: it must follow the decision 1578/1999/QĐ- BGTVT for transportation by buggies There shall be guard at both ends of the road; + Material arrangement shall not affect the railway especially ashlar; + Construction segment-by-segment; + Assign construction guard Safety measure for structure around: - For military optical system: prior to construction, contractor and the military shall mark the location of the cable Identify the positions which need to be moved During the construction, if underground work is found, the local authority shall be informed - For railway telecommunication: the telecommunication structures shall be maintained - Contractor shall conduct the measures for maintaining the security and protecting the infrastructure and preserving the activity of the local residents - Contractor shall construct at the field which has been inspected for mine - After construction, contractor shall clean the site in order to serve the traffic safety and save the environment Labour safety measure: 3.1 Traffic safety for human and vehicle at site: - Contractor shall conduct the measure: + Create a site sign + At the site of bridge, culvert, there shall be fence,guard and light in night + Material shall be gathered neatly + Workers and machines shall join the traffic according to the instruction of traffic department Machines shall be gathered neatly 3.2 Safety for personnel at site: 26 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 *The safety of the construction shall be focused on In order to maintain the labour safety, contractor shall conduct the measures: - Assign guard and make fence at site - Create the regulation at site - Create the slogans for labour safety - Workers shall be equipped sufficient tools - Workers with qualified health shall be allowed to work - There shall be medical personnel at site - Workers shall not be allowed to drink wine and beer - Workers shall be trained fire prevention - The construction tools shall be inspected - There shall be light in night - Contractor shall work with local police and authority to register residency for personnel 3.3 Safety for machine: - Prior to construction, machines shall be inspected - Machines shall have clear origin and operation manual - Machine operators shall be trained - The electricity system for the machines shall have knife contact at site The knife contact shall be in a locked box - Organize a team for repairing machines at site 3.4 Local safety measures: - Register the personnel list with local authority - The construction shall be protected - There shall be guard at site and light at night Safety management during high water period: 4.1 Preparation: - Organize an anti-flood commission at the work site which is led by the work site manager The commissioner shall collaborate closely with each other and implement the measures in case of flood - The workers shall be informed about anti-flood measures in order to implement them - Usually observe the weather report on television and radio 4.2 Prepare material, tools: - The machine shall be prepared 24/24h - Prepare steel D2,D6 in order to tie huts 27 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 - Bamboo stick 0,7-1,2 m long, pole 3.5-5m long - Pump, raincoat, rubber boot… - Prepare the measures for destroying boulder in case boulder falling into the railway 4.3 Anti-flood measures for materials, equipments, huts: - Build huts, storage at tall places with channels for drainage The floor must be embanked Cement storage floor shall have a ashlar layer with woody board beneath and tarpaulins - Tie roofs with D6 steels - Personnel shall be equipped a raincoat Work site management committees, guards, store keepers shall be equipped electric torch - Machines and equipments shall be protected by roofs and moved to safe place in case of heavy rains, winds - Outdoor materials shall have anti-flood measures 4.4 Anti-flood measures for the work being constructed - There shall be measures for preventing the soil and stone from falling into the railway 4.5 Measures for backup construction material, tool: - There shall be backup construction material, tool for one month 4.6 Measures for flood 4.6.1 Prior to flood - The committee shall implement measures for flood - Mobilize personnel to inspect the site and make preparation - Gather outdoor material and cover it if it is necessary - Contact station and local authority for measures and handling urgent cases - Electricity system shall be stopped - Work items shall be protected 4.6.2 During flood - Monitor the actual situation of works, construction equipments In case of risks, they must be tackled immediately - Any problem shall be reported to the site committee - Mobilize personnel and machine in case of force majeure 4.6.3 After flood - Remove wastes - Handle the problems caused by flood - Maintain the railway traffic safety Measures for environment protection and preventing detonation combustion: 5.1 Measure for environment protection: 28 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 - The environment problems such as noise due to the construction shall be restricted by contractor in order to reduce the effect to the activity of local resident - Follow the construction regulation of VNR, the government and some measures as below: + Do not dispose wastes into water + Collect wastes during construction and dispose wastes at designed places + Carrier shall be equipped with tarpaulin + Spray water + Site shall have fence + Site shall be cleaned after each working day + Toilet shall be placed at places which shall be sheltered from wind and cleaned 5.2 Measure for preventing detonation combustion: - Detonation combustion is important Personnel at site shall follow some regulations as below: + Do not bring detonating elements to site + Do not smoke at no-smoking place + Follow the regulation for electricity usage + Use labour protection for tasks such as welding + Material shall be placed according to regulation + Personnel at work site study the methods for preventing detonation combustion + Organize a team for preventing detonating The team shall be trained + Place regulation for detonating combustion at necessary positions such as storage, hut 5.2.1 Organization measure: - The electricity at site shall be monitored by electricity manager at site - Prior to construction, personnel shall be informed about detonating combustion - Request personnel to follow regulation at site - Place signs - Contact the fire fighter police for measures 5.2.2 Conduct method: - The material storage shall not be close to the electricity - Equip fire extinguisher - Do not maintain detonating element - Do not operate the electricity if the electricity manager at site does not agree - Do not use high pole - Do not use electricity in case of problems Do not use electricity during flood 29 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 5.3 Conduct measure - Site committee shall inform workers about labour safety regulation - Assign personnel to monitor labour safety at site - Organize labour safety competition for workers - Contractor shall have measures for monitoring labour safety, punishing violations and rewarding people who follow regulation Security measure: - Contractor’s measures for security include: + Collaborate with local police and authority Contractor shall follow regulation for registering residency and have meeting with local authority + Storage shall be guarded and have light at night + Site huts shall have fence and guard 24h/24h PART CONTRACT PACKAGE IMPLEMENTATION SCHEDULE 30 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 The construction progress The progress for the whole construction is 110 days from the effective day of the contract to the day of acceptance of work Details expressed in the work schedule diagram PART CONCLUSION Based on the content of design documents and related papers, we have researched the 31 METHODS OF CONSTRUCTION LY BRIDGE – KM225+170 particular requirements of the construction carefully and completely Since then, we created our detailed plan and method for the construction We assert that our company shall implement the construction in the shortest time, assure the safety and quality of the construction, satisfy the requirements of durability of the construction as well as requirements of technicality, quality and architecture after the construction is utilized Ha Noi, ………… , 2012 Representative of the Contractor 32 ... CONTENT OF DESIGN: 3.1 Abutment: - Repair abutments, including abutment head, padstone, retaining wall, sidewalk with concrete and reinforcement - The grade of concrete for abutment is 250, padstone... safety - Remove the old concrete at both sides of the abutment including: ballast wall, abutment head, padstone, part of wing wall and abutment body - Increase the connection between the new concrete... for these following items: + Repair abutment head + Contruct bridge approach + Contruct supperstructure + Construct cut-off dike, slope and cone of abutments Completion, Check, Acceptance and