CC1-TASCO JOINT VENTURE HAI PHONG URBAN TRANSPORT DEVELOPMENT PROJECT PACKAGE CW3A: CONSTRUCTION OF SECTION FROM RAO TUNNEL TO NAM HAI ( KM13+450 TO KM16+100) METHOD STATEMENT FOR CONSTRUCTION OF CASTING RC CRADLE I Overview Organizational chart: CC1-TASCO Director of Board of Management: Hoang Trung Thanh Quality Control Manager: Nguyen Van Tuan Site Manager: Nguyen Van Tung Site Engineer Quality Control Engineer Surveying Engineer Sub-contractor (if any) Team leader Site Engineer Foreman, Operator and Workers Method statement for construction of casting RC Cradle CC1-TASCO JOINT VENTURE HAI PHONG URBAN TRANSPORT DEVELOPMENT PROJECT PACKAGE CW3A: CONSTRUCTION OF SECTION FROM RAO TUNNEL TO NAM HAI ( KM13+450 TO KM16+100) Machine, equipment and tools used for construction of cradle of culvert: Equipment and machine used for each team at each section are listed in the following table: No Name Kind Quantity Crane 2,5T Dump truck 10~15 m3 2pcs Mixer 0.25 m3 2pcs Toad compactor MTX -80 Needle vibrator Cầm tay LudiΦ30 Steel bending machine 1HP 220V Water pump Electric generator Light system 10 Measuring devices 152Gasoline 30m3/h Elemax SH 4600EX(5KVA) Raising, lowering and moving cradle of culvert 2pcs 4pcs 1pcs 2pcs Water pump 1pcs Used for working at night wires , lamp 75W set lamps Used for working at night TheodoliteGlunz EDT -02 set LevelSokia C32 11 1pcs Note Other devices Method statement for construction of casting RC Cradle set Bucket, basket, shovel, etc CC1-TASCO JOINT VENTURE HAI PHONG URBAN TRANSPORT DEVELOPMENT PROJECT PACKAGE CW3A: CONSTRUCTION OF SECTION FROM RAO TUNNEL TO NAM HAI ( KM13+450 TO KM16+100) Method statement for construction of casting RC Cradle CC1-TASCO JOINT VENTURE HAI PHONG URBAN TRANSPORT DEVELOPMENT PROJECT PACKAGE CW3A: CONSTRUCTION OF SECTION FROM RAO TUNNEL TO NAM HAI ( KM13+450 TO KM16+100) II MANUFACTURING PROCESS OF CRADLE OF CULVERT Design check – materials estimation – materials buying Check and warehousing Mix design, formwork, reinforcement Concrete mixing Reinforcement processing Formwork processing Check Reinforcement and formwork installation Concrete work Formwork removal, maintenance Check, warehousing Moved to site Installed at site Method statement for construction of casting RC Cradle CC1-TASCO JOINT VENTURE HAI PHONG URBAN TRANSPORT DEVELOPMENT PROJECT PACKAGE CW3A: CONSTRUCTION OF SECTION FROM RAO TUNNEL TO NAM HAI ( KM13+450 TO KM16+100) Materials for manufacturing elements of cradle Materials used for manufacturing precast elements of cradle include: - Cement : cement PC40 - Ballast 1x2 - Sand - water used for concrete: fresh water admixture and fly-ash - normal reinforcement of concrete meets requirements of technical specification of the project: Grade steel All materials mentioned above are met the requirements of technical specification fo the project and approved by the Engineer Storing materials abides by the regulation Concrete mixing 2.1 Materials preparation - source experiments of aggregate after checked and approved is stored where - Approved cement source by the Engineer is transported to site by truck - Fresh water must ensure quality 2.2 Measurement of materials The materials above are measured in accordance with designed elements by wooden drawers Aggregate rate must be checked by the site labratory before producing 2.3 Concrete mixing Concrete is produced by concrete mixer After measurement, raw materials will be mixed in mixer for each time Then concrete is discharged into the ground-lined dump, concrete is then poured into a bucket and erected steel form Production technology of elements of cradle of culvert Method statement for construction of casting RC Cradle CC1-TASCO JOINT VENTURE HAI PHONG URBAN TRANSPORT DEVELOPMENT PROJECT PACKAGE CW3A: CONSTRUCTION OF SECTION FROM RAO TUNNEL TO NAM HAI ( KM13+450 TO KM16+100) 3.1 Technology of formwork Formwork is designed and made of steel with stability and allowable difference Formwork is processed to be even and smooth, easy to assembly and transport, rubber pads are installed at edges to ensure tightness when placing and compacting concrete Before installation, formwork will be cleaned and covered with a thin layer of nonstick oil Formwork must be accepted by the Engineer and Board of Management before producing 3.2 Processing and installation of reinforcement - Reinforcement is processed and installed in accordance with the design to ensure shaping of product - After finishing reinforcement installation checked by the Engineer in accordance with the design, concrete work has just carried out - Reinforcement with the diameter D