CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION CONSTRUCTION METHOD STATEMENT FOR ABUTMENTS AND PIERS TABLE OF CONTENTS CHAPTER I: PREPARATION WORKS I CONSTRUCTION LAYOUT II ARRANGEMENT OF WORKING TEAMS III MOBILIZATION OF EQUIPMENT FOR CONSTRUCTION OF ABUTMENTS AND PIERS CHAPTER II: FALSEWORK CONCRETE WORK, REINFORCEMENT, FORMWORK, I FORMWORK AND FALSEWORK II REINFORCEMENT III CONCRETE WORK IV INSPECTION AND ACCEPTANCE CHAPTER III: CONSTRUCTION METHODS FOR ABUTMENTS AND PIERS I GENERAL II CONSTRUCTION SEQUENCES FOR ABUTMENTS AND PIERS 1/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION CHAPTER I: PREPARATION WORKS I CONSTRUCTION LAYOUT 2/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION + Bridge Code Jurisdiction City/ Bridge Location Distric t Provinc e Design Results Expressway/Linking Road Commun e Thruwa y SA/PA Thruwa y Cross Road Interchange Thruway D/D Bridge Station Girde r Girder Arrange Type Rampw ay • ORB07 OP09 ORB08 Quang Nam Que Son Que Xuan Km034+151 PC-I Girde r 1@33 Km035+479 PC-I Girde r 1@21 Km036+431 PC-I Girde r 1@33 Km038+377 PC-I Girde r 3@24 Km039+652 PC-I Girde r 6@33 Km040+110.1 PC-I Girde r 1@33 Km040+880 PC-I Girde r 1@27 Km041+235 PC-I Girde r 1@24 • Phu Tho • • ORB09 a • LRB08 • CB09 OP09a OP10 Thanh Binh Binh Quy • • Construciton Sequence 3/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION - Bridge shall be chosen as the place to gather materials and machinery at the positions of apporach roads on the left side , facilitate the movement of machinery or supply equipment - Carry out the demolition works within the construction area of bridge - Leveling of construction site - Construction of the boundary fence around the site by wire mesh, 1.6 m high - Construction of temporary service roads - Construction of warehouses, accommodation, casting yards - Details of construction plan show in the drawings of construction method for each bridge II ARRANGEMENT OF WORKING TEAMS ORB07 - Km34+151 (1 span I33m - 10 girders) Arranging construction teams as follows: - Team 1: Construction of bored piles - Team 2: Construction of abutments, piers and approach slabs - Team 3: Casting beams and launching and installation of beams, Construction of desk slabs, parapet and handrail, expansion joints and miscellaneous OP09 - Km35+497 (1 span I21m - 14 girders) Arranging construction teams as follows: - Team 1: Construction of bored piles - Team 2: Construction of abutments, piers and approach slabs - Team 3: Casting beams and launching and installation of beams, Construction of desk slabs, parapet and handrail, expansion joints and miscellaneous ORB08 - Km36+431.4 (1 span I33m - 14 girders) Arranging construction teams as follows: - Team 1: Construction of bored piles - Team 2: Construction of abutments, piers and approach slabs - Team 3: Casting beams and launching and installation of beams, Construction of desk slabs, parapet and handrail, expansion joints and miscellaneous ORB09A - Km38+377.5 (3 spans I24m - 30 girders) Arranging construction teams as follows: - Team 1: Construction of bored piles 4/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION - Team 2: Construction of abutments, piers and approach slabs - Team 3: Casting beams and launching and installation of beams, Construction of desk slabs, parapet and handrail, expansion joints and miscellaneous LRB08 - Km39+645.85 (6 spans I33m - 60 girders) Arranging construction teams as follows: - Team 1: Construction of bored piles - Team 2: Construction of abutments, piers and approach slabs and retaining wall - Team 3: Casting beams and launching and installation of beams, Construction of desk slabs, parapet and handrail, expansion joints and miscellaneous CB09 - Km40+110.15 (1 span I33m - 10 girders) Arranging construction teams as follows: - Team 1: Construction of bored piles - Team 2: Construction of abutments, piers and approach slabs - Team 3: Casting beams and launching and installation of beams, Construction of desk slabs, parapet and handrail, expansion joints and miscellaneous OP09a - Km40+880 (1 span I27m - 14 girders) Arranging construction teams as follows: - Team 1: Construction of bored piles - Team 2: Construction of abutments, piers and approach slabs - Team 3: Casting beams and launching and installation of beams, Construction of desk slabs, parapet and handrail, expansion joints and miscellaneous OP10 - Km41+235 (1 spans I24m - 13 girders) Arranging construction teams as follows: - Team 1: Construction of abutments, piers and approach slabs - Team 2: Casting beams and launching and installation of beams, Construction of desk slabs, parapet and handrail, expansion joints and miscellaneous in the Site, based on actual situation, the Contractor will suitably organize constructions teams to meet the construction schedule 5/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION III MOBILIZATION OF EQUIPMENT FOR CONSTRUCTION OF ABUTMENTS AND PIERS The contractor will mobilize the entire construction equipment and machinery needed for construction of bridges Intended mobilization as in the under statics table: Item No Description Unit Quantities Bulldozer ≥140CV Nos Excavators 1.25m3 Nos Crane 35 tons Nos 10 Mobile Crane 10 tons Nos Vibratory hammer Nos Concrete agitators Nos 10 Water pump 60m3/h Nos 10 Welding machine 23kw Nos 10 10 Generator 200KVA Nos 11 Trucks ≥10T Nos 12 Rebar bending and cutting machine Nos 10 15 Electromechanical poker vibrators D70 Nos 20 16 Concrete Mixing Plant Nos 17 Transformer Station Nos Nos Nos Nos 18 19 20 6/ 35 Total Station Surveyor’s Level Concrete Pumping machine 60m3/h Remarks PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION CHAPTER II: CONCRETE WORK, REINFORCEMENT, FORMWORK, FALSEWORK All specifications for this work item will be in accordance with Division 7: Concrete and Bridge Works of the Specification I FORMWORK AND FALSEWORK The Contractor shall submit a method statement for formwork and falsework, including design calculations, shop drawings, working drawings and details of all materials and manufactured goods included in the formwork and falsework to the Engineer for his approval at least two months before the start of construction work on Site Work shall not start until approval has been given Formwork shall be made of steel to ensure rigidity, stability and removable, and will not cause difficulties for installation of reinforcement steel, placing and compacting concrete Formwork and falsework shall be designed for vertical load and lateral pressures in accordance with Vietnamese Standard TCVN 4453-1995 and where appropriate, any increased or readjusted loading that may result from prestressing forces If retarding admixtures are used their effect shall be duly considered during the calculation of the lateral pressures of the fresh concrete The formwork and falsework shall be designed and constructed to ensure completed concrete surfaces comply with the tolerances specified in Vietnamese Standard TCVN 4453-1995 or relevant Specification All joints in shuttering or moulds must be tight to avoid water loss when poured and compacted cement concrete, at the same time protect the fresh concrete from weather influences Fabricating and installation of formwork must be accurate as in accodance with the correct shape and size Formwork will be the appropriate design and durable construction The contractor will adjust to get the exact concrete structures to ensure small chamfer, camber, etc It is neccessary to limit formwork joints, the joints should not be arranged on the same cross section and at the position of big loads The bracing, strut and supports should be calculated and arranged appropriately to the overall stability of formwork Installation of formwork should ensure the following requirements:  The formwork surface in contact with concrete shall be covered by non-stick oil The anti-adhesive oil is applied according to the manufacturer's instructions and not touch either reinforcing steel or prestressed strand and anchors The Contractor shall use only one type of anti-adhesive oil for the concrete structure to ensure uniformity of color concrete  Formwork will be cleaned thoroughly before pouring concrete  Formwork is installed how to match up with the early removal of formwork without affecting to the quality 7/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION  Formwork must be placed firmly on concrete or a hard ground, smooth, non-slip and no deformation when the bearing the load and the impact of the construction process  When installation of formwork, the surveying markers, control points or the appropriate measures to check the centre line  Tolerances for installing formwork must be in compliance with project standards Formwork is only be removed when the concrete have reached the strengths of each type of structures indicated by the technical instructions of the project Removal of formwork should be avoided without causing sudden stress or strong collision: 8/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION F ormwork/Falsework Time / % of Design Strength of Concrete Precast Girder (I) - / 90% Support members/Pier head (30 MPa) - / 100% Centering under girders, beams, frames or arches 14 days / 80% Floor slabs 14 days / 70% Columns days / 70% Walls, sides of beams and all other vertical surfaces day / 70% To enable finishing, forms used for parapets, barriers, and exposed vertical surfaces may be removed between 24 hours and 48 hours after casting, depending on weather conditions II REINFORCEMENT General requirement Reinforcement steel used in reinforced concrete structures must be ensured the design requirements Reinforcement steel is fabricated at the site in conformity with the Specifications Do not use the reinforcement steels of the same shape, geometrical size in the same works, but different physical properties All Reinforcing Steel bars and deformed billet steel shall conform to Vietnamese Standard TCVN 1651:2008 In case items are not covered by TCVN 1651:2008 then AASHTO M31 (ASTM A615), Grade 60 or equivalent and AASHTO M31 (ASTM A615), Grade 40 for plain round reinforcing bars shall be used Testing shall be in accordance with Vietnamese Standard TCVN 1651:2008 with AASHTO T68 as the equivalent standard Unit stress calculations for bars having an area differing by percent or more from the nominal bar area shall be made using the actual measured bar area Before fabrication of reinforcement steel and before placing concrete should ensure:  The surface is clean, no sticky dirt, grease, no flakes and rust layers on steel  Reinforcement in the yard will be placed on sleepers with canvas cover  Reinforcement steel were crushed, loss in cross section due to cleaning or other reasons shall not exceed the permitted limit of 2% in diameter If this limit is exceeded that limit reinforcement steels shall be used in actual remained cross section  Reinforcement steel should be bent, pulled and straightened Cutting and bending of reinforcing steel 9/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION The fabrication of reinforcing steel is in compliance with project standards Cutting and bending reinforcing steel shall be conducted only by mechanical methods Reinforcing steel is bent to fit the shape, size of the design Steel products to be cut and bent must be inspected and approved by the Engineer Bar reinforcement shall be cut and bent to the shapes shown on the Drawings Fabrication tolerances shall be in accordance with ACI 315 All bars shall be bent cold, unless otherwise permitted Bars partially embedded in concrete shall not be field bent except as shown on the Drawings or as specifically permitted The dimensions of hooks and the diameters of bends measured on the inside of the bar shall be as shown on the Drawings When the dimensions of hooks or the diameter of bends are not shown, they shall be in accordance with Article of Vietnamese Standard 22TCN 272-05 Bridge Design Standard Reinforcement Joints Welding Joints: Welding Joints are permitted only when approved by Consulting Engineer or specified in the drawings Welding joints can be done by several different methods, but to ensure quality of welding seams as in accordance with design requirements When febricating the reinforcing steel grid by welded points, if no special instructions, comply with the following provisions:  For the smooth round steel, welding all the points of intersection  For deformed steel, welding all the points of intersection in two rows of outer perimeters, the remaining points in between by a welding alternating order; Electrical arc welding is used in the following cases:  Welding the extended hot-rolled steel bars with diameter greater than mm  Welding all the in-situ details, the component structures and bonding of joints in the assembly The welding joints must meet the following requirements:  Smooth surface, no uninterrupted fire, no narrow locally and there are no bubbles  Make sure the length and height of welding seams as required design Reinforcing Steel Components 10/ 35 Chemical Composition Percent Carbon (C) 0.30 Manganese (MA) 1.50 Carbon Equivalent (CE) 0.55 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION Verticality - ±1/30 Top Grade Irregularities - - Wall Flatness - - - ±1/ 300 ±1/500 ±2.5 ±3 mm ±5 mm in 200 mn in in m in m 3m (1/1000) ±5 mm - CHAPTER III: CONSTRUCTION METHODS FOR ABUTMENTS AND PIERS I General The service road including temporary culverts, temporary bridge, working platform (if necessary) will be installed first To prevent water from leakage, sealing concret will be poured (if necessary) Foundation construction For the abutments and piers on land of bridges of:  ORB07 - Km34+151 (1 span I33m - 10 girders)  OP09 - Km35+497 (1 span I21m - 14 girders)  ORB08 - Km36+431.4 (1 span I33m - 14 girders)  ORB09A - Km38+377.5 (3 spans I24m - 30 girders)  LRB08 - Km39+645.85 (6 spans I33m - 60 girders)  CB09 - Km40+110.15 (1 span I33m - 10 girders) Based on the depth of foundation pit and geological conditions, the contractor shall propose method of blockage by using steel sheet piles to prevent soil, water before excavation The details are shown in the methods of construction drawings For the abutments bridges of:  OP09a - Km40+880 (1 span I27m - 14 girders)  OP10 - Km41+235 (1 spans I24m - 13 girders) Based on the depth of foundation pit and geological conditions, the contractor shall propose method opened excavation of foundation The details are shown in the methods of construction drawings For Piers under water: Pier P3-P4 of LRB08 - Km39+645.85 (6 spans I33m - 60 girders) The contractor will execute bored piles by construction method of drilling on river The position of the bored piles will be located by a positioning framework system Working platform will be installed before executing boring Machines and equipments will stand on temporary bridge and working platform for construction activities 21/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION After installation of close cofferdam of steel sheet piles, excavating the pit by machines combined with manpower For piers under water, the Contractor shall keep equality of the water level inside and outside then placing seal concrete to covere the pit bottom and dry pit bottom by pumping The other steps of construction will be conducted similarly as construction of abutment and piers on land Excavation of foundation pit The excavation of foundation pit shall be carried out by machines together with labor During excavation process, the Contractor will install the support of steel framework, braces to ensure stablility of steel sheet piles After excavation by machine, remained works will be completed by manual labour and manually create a flat bottom of foundation pit Placing the lean concrete layer In cases, the work is executed while pumping water out from the pit, pumping water from the bottom of the pit with the depth lower than bottom level at least 0.5 m, capacity of the pumps must be bigger than the leakage water Pump out the water and let water flow into the conduits or channels to prevent water overflow back into the pit causing erosion of the pit Dimension of pit must ensure the space for working such as installation and removal of formwork, stagnant water hole to pump out water to dry pit The excavated material must be hauled to the regulated places Framework system must ensure bearing load All the designs of pit shall be submitted to the Engineer for his consideration and aprroval in writing prior to execution of the works After construction completion, all construction materials will be removed and backfill as requirements Construction bodies of abutments and piers: Contractor use shaped scaffolding and formwork system, which were fabricated in the workshops The fabrication of scaffolding formwork must satisfy the following requirements:  Formwork used for concrete is made of the steel or other materials approved by the Engineer  Formwork must be accepted by the Engineer prior to installation  Only removal of scaffolding and formwork when the concrete reaches the calculation strength (normally 75 % to 90% of design strength)  Scaffolding used as supports, bracings and stringers for the construction of concrete items shall be steel scaffolding For special items scaffolding will be closely inspected about load capacity and deflection Concrete works 22/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION Prior to commencement of work items must conduct:  Design of concrete mix  Establish detailed drawings of construction methods including schedule, equipments, manpower, formwork, etc After getting the approval of the Engineer, start work Concrete batching plant or concrete mixer must work well and there are standby concrete mixers The construction equipments such as: Electrical poker vibrators, vibratory tampers, concrete pumps, concrete agitators, welding machines, generators all in good condition The testing equipment for checking and inspection of quality such as tachometer, surveyor's level, steel rulers, slump measuring device, etc Before the placing concrete of the next layer on the setting concrete surface as the above regulations, the surface should be made rough by watering and wire brush Cure of concrete as in accordance with the current regulations Curing concrete for the approach slabs Materials for the production of concrete is placed into separate stockpiles, cement and steel must be placed in good condition After completion of concrete work, the contractor will complete the as-built documents and move to the next works 23/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION II Construction sequences for abutments and piers Construction sequences of Bridge Right Side and Left Side ORB07 - Km34+151 (1 span I33m - 10 girders) At the same time OP09 - Km35+497 (1 span I21m - 14 girders) At the same time ORB08 - Km36+431.4 (1 span I33m - 14 girders) At the same time ORB09A - Km38+377.5 (3 spans I24m 30 girders) At the same time LRB08 - Km39+645.85 (6 spans I33m 60 girders) Construction of Left side first then Right side CB09 - Km40+110.15 (1 span I33m - 10 girders) At the same time OP09a - Km40+880 (1 span I27m - 14 girders) At the same time OP10 - Km41+235 (1 spans I24m - 13 girders) At the same time Construction sequences for abutments: After completion of bridges, Channelization of stream will be carried out if necessary Construction of Bridge ORB07 - Km34+151 (1 span I33m - 10 girders) Construction of Abutment A1  Leveling site plan  Drilling bored piles (18 piles - D1200, L=14.5m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Construction of Abutment A2 24/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION  Leveling site plan  Drilling bored piles (18 piles - D1200, L=27m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Super-structure construction  Pre-casting I beams, L=33m (10 beams)  Installation of beams by cranes  Construction of cross beams  Construction of desk slabs, parapet and handrail, expansion joints  Construction of Approach road and Miscellaneous Construction of Bridge OP09 - Km35+497 (1 span I21m - 14 girders) Construction of Abutment A1  Leveling site plan  Drilling bored piles (18 piles - D1000, L=15m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Construction of Abutment A2  Leveling site plan  Drilling bored piles (18 piles - D1000, L=12m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment 25/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION  Construction of body & wing wall  Finished works Super-structure construction  Pre-casting I beams, L=21m (14 beams)  Installation of beams by cranes  Construction of cross beams  Construction of desk slabs, parapet and handrail, expansion joints  Construction of Approach road and Miscellaneous Construction of Bridge ORB08 - Km36+431.4 (1 span I33m - 14 girders) Construction of Abutment A1  Leveling site plan  Drilling bored piles (20 piles - D1000, L=32m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Construction of Abutment A2  Leveling site plan  Drilling bored piles (20 piles - D1000, L=22m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Super-structure construction  Pre-casting I beams, L=33m (14 beams)  Installation of beams by cranes  Construction of cross beams  Construction of desk slabs, parapet and handrail, expansion joints 26/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION  Construction of Approach road and Miscellaneous Construction of Bridge ORB09A - Km38+377.5 (3 spans I24m - 30 girders) Construction of temporary bridge and service road Construction of Abutment A1  Leveling site plan  Drilling bored piles (14 piles - D1000, L=23m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Construction of Pier P1  Driving sheet pile of cofferdam, Leveling site plan  Drilling bored piles (12 piles - D1000, L=9m)  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Footing construction  Pier body construction  Pier head construction  Finished works Construction of Pier P2  Driving sheet pile of cofferdam, Leveling site plan  Drilling bored piles (12 piles - D1000, L=7m)  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Footing construction  Pier body construction  Pier head construction  Finished works Construction of Abutment A2 27/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION  Leveling site plan  Drilling bored piles (14 piles - D1000, L=19m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Super-structure construction  Pre-casting I beams, L=24m (30 beams)  Installation of beams by lauching method  Construction of cross beams  Construction of desk slabs, parapet and handrail, expansion joints  Construction of Approach road and Miscellaneous Construction of Bridge LRB08 - Km39+645.85 (6 spans I33m - 60 girders) Construction of temporary bridge and service road Construction of Abutment A1 (Left side)  Leveling site plan  Drilling bored piles (9 piles - D1200, L=6m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Construction of Pier P1 (Left side)  Leveling site plan  Driving sheet pile of cofferdam, Installation of support frame  Excavating foundation pit, construction of lean concrete  Footing construction  Pier body construction  Pier head construction 28/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION  Finished works Construction of Pier P2 (Left side)  Leveling site plan  Driving sheet pile of cofferdam  Drilling bored piles (5 piles - D1200, L=11.5m)  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Footing construction  Pier body construction  Pier head construction  Finished works Construction of Pier P3 (Left side)  Construction of working platform  Drilling bored piles (5 piles - D1200, L=6m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Footing construction  Pier body construction  Pier head construction  Finished works Construction of Pier P4 (Left side)  Construction of working platform  Pouring seal concrete (Doughnut shape), Excavating foundation pit, Pile head treatment, construction of lean concrete  Footing construction  Pier body construction  Pier head construction  Finished works Construction of Pier P5 (Left side)  Leveling site plan  Driving sheet pile of cofferdam, Installation of support frame 29/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION  Excavating foundation pit, construction of lean concrete  Footing construction  Pier body construction  Pier head construction  Finished works Construction of Abutment A2 (Left side)  Leveling site plan  Drilling bored piles (7 piles - D1200, L=6m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Sub-structure construction (Right side) Construction of temporary bridge and service road Construction of Abutment A1 (Right side)  Leveling site plan  Drilling bored piles (9 piles - D1200, L=6m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Construction of Pier P1 (Right side)  Leveling site plan  Driving sheet pile of cofferdam  Drilling bored piles (5 piles - D1200, L=14m)  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Footing construction 30/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION  Pier body construction  Pier head construction  Finished works Construction of Pier P2 (Right side)  Leveling site plan  Driving sheet pile of cofferdam  Drilling bored piles (5 piles - D1200, L=22.5m)  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Footing construction  Pier body construction  Pier head construction  Finished works Construction of Pier P3 (Right side)  Construction of working platform  Drilling bored piles (5 piles - D1200, L=10m)  Driving sheet pile of cofferdam  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Footing construction  Pier body construction  Pier head construction  Finished works Construction of Pier P4 (Right side)  Construction of working platform  Pouring seal concrete (Doughnut shape), Excavating foundation pit, Pile head treatment, construction of lean concrete  Footing construction  Pier body construction  Pier head construction  Finished works Construction of Pier P5 (Right side) 31/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION  Leveling site plan  Driving sheet pile of cofferdam  Drilling bored piles (5 piles - D1200, L=6m)  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Footing construction  Pier body construction  Pier head construction  Finished works Construction of Abutment A2 (Right side)  Leveling site plan  Drilling bored piles (7 piles - D1200, L=6.5m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Super-structure construction Left side  Pre-casting I beams, L=33m (30 beams)  Installation of beams by launching method  Construction of cross beams  Construction of desk slabs, parapet and handrail, expansion joints Right side  Pre-casting I beams, L=33m (30 beams)  Installation of beams by launching method  Construction of cross beams  Construction of desk slabs, parapet and handrail, expansion joints Construction of Approach road and Miscellaneous Construction of Bridge CB09 - Km40+110.15 (1 span I33m - 10 girders) 32/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION Construction of Abutment A1  Leveling site plan  Drilling bored piles (14 piles - D1200, L=6m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Construction of Abutment A2  Leveling site plan  Drilling bored piles (14 piles - D1200, L=10m)  Driving sheet pile of cofferdam, Installation of support frame  Checking quality, capacity of bored piles works  Pouring seal concrete, Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Super-structure construction  Pre-casting I beams, L=33m (10 beams)  Installation of beams by cranes  Construction of cross beams  Construction of desk slabs, parapet and handrail, expansion joints   Construction of Approach road and Miscellaneous Construction of Bridge OP09a - Km40+880 (1 span I27m - 14 girders) Construction of Abutment A1  Leveling site plan  Drilling bored piles (24 piles - D1200, L=6m)  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment 33/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION  Construction of body & wing wall  Finished works Construction of Abutment A2  Leveling site plan  Drilling bored piles (24 piles - D1200, L=6m)  Checking quality, capacity of bored piles works  Excavating foundation pit, Pile head treatment, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Super-structure construction  Pre-casting I beams, L=27m (14 beams)  Installation of beams by cranes  Construction of cross beams  Construction of desk slabs, parapet and handrail, expansion joints   Construction of Approach road and Miscellaneous Construction of Bridge OP10 - Km41+235 (1 spans I24m - 13 girders) Construction of detour road Sub-structure construction  Construction of Abutment A1  Leveling site plan  Driving sheet pile of cofferdam, Installation of support frame  Excavating foundation pit, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall  Finished works Construction of Abutment A2  Leveling site plan  Driving sheet pile of cofferdam, Installation of support frame  Excavating foundation pit, construction of lean concrete  Construction of footing Abutment  Construction of body & wing wall 34/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV CIVIL WORKS CONTRACT PACKAGE (KM 32+600-KM42+000)- DA NANG – QUANG NGAI SECTION  Finished works Super-structure construction  Pre-casting I beams, L=24m (13 beams)  Installation of beams by cranes  Construction of cross beams  Construction of desk slabs, parapet and handrail, expansion joints   Construction of Approach road and Miscellaneous 35/ 35 PHUONG THANH TRANCONSIN – CIENCO6 – CIENCO8 – THANH PHAT JV ... Team 2: Construction of abutments, piers and approach slabs - Team 3: Casting beams and launching and installation of beams, Construction of desk slabs, parapet and handrail, expansion joints and. .. Team 2: Construction of abutments, piers and approach slabs - Team 3: Casting beams and launching and installation of beams, Construction of desk slabs, parapet and handrail, expansion joints and. .. of abutments, piers and approach slabs and retaining wall - Team 3: Casting beams and launching and installation of beams, Construction of desk slabs, parapet and handrail, expansion joints and