CONSTRUCTION METHOD STATEMENT GMS Ben Luc – Long Thanh Expressway Project Package A4 (Km18+713 5 – Km21+739 5) SECTION 4 CONSTRUCTION METHOD STATEMENT GMS BEN LUC – LONG THANH EXPRESSWAY PROJECT Packa[.]
GMS Ben Luc – Long Thanh Expressway Project Package A4: (Km18+713.5 – Km21+739.5) SAMWHAN – VINACONEX E&C J.V SECTION 4: CONSTRUCTION METHOD STATEMENT GMS BEN LUC – LONG THANH EXPRESSWAY PROJECT Package A4: Km18+713.5 – Km21+739.5 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 PART II - CONSTRUCTION METHOD A General construction method I Construction site layout II Scope of works III Technical method IV General construction method Page - GMS Ben Luc – Long Thanh Expressway Project Package A4: (Km18+713.5 – Km21+739.5) SAMWHAN – VINACONEX E&C J.V Site layout Construction layout Construction sequences B Detail construction method of work items I Bridge construction method General introduction 1.1 Ong Luong bridge 1.2 Nguyen Van Tao Interchange bridges 1.3 Ba Chua bridge Arrangement of construction units for bridge Site arrangement 3.1 Site of Ong Luong bridge 3.2 Site of Nguyen Van Tao Interchange bridges 3.3 Ba Chua bridge Main construction method for Bridge 4.1 Ong Luong bridge 4.2 Nguyen Van Tao Interchange bridges 4.3 Ba Chua bridge Construction method of substructure (abutments, piers) 5.1 Construction method of abutment or pier on land, using foundation pit without cofferdam 5.2 Construction method of pier in water, foundation pit with steel sheet pile cofferdam Construction method of superstructure 6.1 Ong Luong bridge 6.2 Nguyen Van Tao Interchange bridges Page - using GMS Ben Luc – Long Thanh Expressway Project Package A4: (Km18+713.5 – Km21+739.5) SAMWHAN – VINACONEX E&C J.V 6.3 Ba Chua bridge General construction works 7.1 Construction work for concrete and reinforcement concrete 7.2 Construction works of bored pile on land 7.3 Pots tensioned pre-stressed R.C super T girder casting technology (l=38.3m and 34.3m) 7.4 Method of PCI girder casting techology (l=33.0m) 7.5 Construction of solid slab girder casting in place on scaffolding 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 By PVD 2.5.2 By PHD 2.5.3 By Soil cement column Drainage system 3.1 Requirements for material 3.2 Requirement for construction plant, equipment and labor 3.3 Construction of pipe culvert Page - GMS Ben Luc – Long Thanh Expressway Project Package A4: (Km18+713.5 – Km21+739.5) SAMWHAN – VINACONEX E&C J.V 3.4 Construction of Technical Box culvert Sub-base and Base 4.1 Requirements for material 4.2 Requirements for construction plant, equipment and labor 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 13cm thickness 5.6 AC binder course at 7cm 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 method Page - GMS Ben Luc – Long Thanh Expressway Project Package A4: (Km18+713.5 – Km21+739.5) SAMWHAN – VINACONEX E&C J.V PART I - GENERAL SCHEDULE I Bidder’s familiarity and understanding of construction site: The GMS Ben Luc – Long Thanh expressway project is a part of the NorthSouth Expressway It is passing through Ho Chi Mnh City, Dong Nai Province and Long An Province… The Ben Luc – Long Thanh expressway is about 57.1km long This’s connected Ben Luc District, Ho Chi Minh City with Long Thanh District, Dong Nai Province + The Start point: Km0+600, Ben Luc District, Ho Chi Minh City + The End point: Km57+700, Long Thanh District, Dong Nai Province Package A4 is from Km18+713.50 (Ending point Contract Package A3) to Km21+739.5 (beginning point Contract Package J1), total length of this package is 3026m The site is located at Da Phuoc commune, Binh Chanh district and Nhon Duc commune, Nha Be district of Ho Chi Minh City Main technical properties of Project + Road classification: Expressway, Type A + Design speed: Expressway 120km/h + Lanes: lanes (Ultimate stage: widened to lanes) + Width: Road section 25.0m; Bridge section 21.75m Topography condition In the Package A4, the Expressway runs area with topographical condition is rather relatively flat, passing through paddy fields, canals and big river (Can Giuoc river)… Geological condition Geological at area of this Package have some layer as: - Layer 0a: Filling soil: mud – clay with plants - Layer 0b: Top soil: Silty sand (SM) - Layer 1a: Elastic silt, greenish grey, blackish grey(MH) Page - GMS Ben Luc – Long Thanh Expressway Project Package A4: (Km18+713.5 – Km21+739.5) SAMWHAN – VINACONEX E&C J.V - Layer TK1a: Sandy, silty sand (SC) - Layer 1b: Elastic silt with sand, greenish grey, blackish grey (MH)s - Layer 1c: Elastic silt, greenish grey, blackish grey (MH) - Layer TK1c: Sandy, silty sand (SC) - Layer 2a: Fat clay with sand, greenish grey, blackish grey (CH) - Layer TK2a: Sandy, silty sand (SC) - Layer 2b: Lean clay with sandy, greenish grey, blackish grey (CL)s - Layer TK2b: Sandy, silty sand (SC) - Layer 2c: Fat clay, elastic silt, greenish grey, blackish gray (CH)-(MH) - Layer TK2c: Sandy, silty sand (SC) - Layer 3a: Clayey sand, silty sand, brownish grey, yellowish grey, whitish grey (SC-SM) - Layer TK3a: Lean clay with sandy yellowsh grey, greenish grey (CL)s - Layer 3b: Silty sand, clayey sand, silty clay brownish grey, yellowish grey, whitish grey (SC-SM) - Layer TK3b: Lean clay with sandy yellowsh grey, greenish grey (CL)s - Layer 3c: Silty sand, Well graded sand with a little grits, whitish grey (SC-SW) - Layer TK3c: Sandy lean clay, greenish grey, yellowish grey (CL) - Layer 4a: Lean clay, yellowish grey, greenish grey (CL) - Layer 4b: Lean clay with some sandy, yellowish – greenish grey (CL) - Layer 4c: Sandy lean clay, greenish grey, yellowish grey (CL) - Layer TK4c: Silty-clayey sand with graval, whitish grey, greenish grey (SCSM) - Layer 5a: Silty, clayed sand (SC-SM), medium dense - Layer TK5a: Lean clay, very stiff (CL) - Layer 5b: Silty-clayey sand with graval (SC-SP), very dense - Layer TK5b: Lean sand with graval, brownish-whitish grey, hard (SC-SM) Page - GMS Ben Luc – Long Thanh Expressway Project Package A4: (Km18+713.5 – Km21+739.5) SAMWHAN – VINACONEX E&C J.V - Layer 6: Lean clay with sand , yellowish grey, greenish grey (CL)s - Layer 7a: Strongthly-Moderately Wearthered Riolite stone - Layer 7b: Moderately-Slyghtly Weathered Riolite stone Scope of works: The GMS Ben Luc – Long Thanh Expressway Project Package A4 is executed in a 30 months with the main work items: - Construct new road Total length of road and bridge is 3,026 m on the flat area base on the embankment works - Construct frontage road system - Construct bridges (Ong Luong, Ba Chua) and Nguyen Van Tao Interchange Bridges ( Main overpass section A1-P21 and P22-P1(pakage J1) and B,C,D,E Ramp Bridges) - Construct a drainage pipe culvert - Construct a technical box culvert - 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 PVD or DMM, super T girder, bored pile 1.2m, cast in place prestressed solid slab girder on scaffolding… - Construction Schedule: - The execution time is 30 months which requires the Contractor shall be in ready manner, his mobilization labor and equipment 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 Page - GMS Ben Luc – Long Thanh Expressway Project Package A4: (Km18+713.5 – Km21+739.5) SAMWHAN – VINACONEX E&C J.V - 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 this package 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 Ho Chi Minh City electric to buy power from lowvoltage 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 Ho Chi Minh City 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 such as Tien river… transported by waterway to the site - Stone material: - Stone material will be taken from the following quarries: Stone for concrete, asphalt concrete, crushed stone: taken from Dong Nai, Binh Duong, Vung Tau province… and transported by waterway to the site Page - SAMWHAN – VINACONEX E&C J.V GMS Ben Luc – Long Thanh Expressway Project Package A4: (Km18+713.5 – Km21+739.5) - Yellow sand (coarse sand): - Coarse sand for asphalt concrete, cement concrete, sand blanket… taken from Dong Nai, Binh Duong, Vung Tau province… and then transported by water ways to the site - Soil for embankment: - Taken from Dong Nai, Binh Duong, Vung Tau province… transported by waterway to the site - Bitumen: - Dense bitumen with 60/70 pen Is bought from Ho Chi Minh City, and shall be transported by truck or waterway to the site - Steel bar: - Use Viet-Australia steel, Viet-Han steel, Viet-Japan steel or Polima steel… after having approved by the Employer The steel material is supplied at Ho Chi Minh City - Cement: - The cement will be bought at Ho Chi Minh City and transported by waterway to the site - Geo-textile, PVDs, pre-stressed cable, bearing pad, expansion joints: - Shall be imported - Asphalt concrete: - The contractor locates 02 plants at the area of construction site - Cement concrete: - The contractor locates 02 concrete plants at both side of Can Giuoc river - Corrugated guardrail and other materials: - The Contractor shall be bought from the suppliers in Ho Chi Minh City - Water for concrete: - Use water source from drilled well at site and processed freshly Page - GMS Ben Luc – Long Thanh Expressway Project Package A4: (Km18+713.5 – Km21+739.5) SAMWHAN – VINACONEX E&C J.V - 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 committee, police, authorities people’s relevant 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 - 10 ... District, Dong Nai Province Package A4 is from Km18+713.50 (Ending point Contract Package A3) to Km21+739.5 (beginning point Contract Package J1), total length of this package is 3026m The site... Package A4: (Km18+713.5 – Km21+739.5) SAMWHAN – VINACONEX E&C J.V - The supply of materials for package is favorable, because sand borrow pits are not so much far The traffic in and out the package. .. Project Package A4: (Km18+713.5 – Km21+739.5) SAMWHAN – VINACONEX E&C J.V - Pre-stressed cable, bearing, expansion-joint: - The Contractor will be imported meeting technical specifications of the package