Method Statement of Foundation

CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation METHOD STATEMENT SMC Manufacturing (Viet nam) Factory-phase Project RC FOOTINGS Ref No: SMC-ACS-MS-00-RCF-001 Rev 01 ACSC- CONG TY CO PHAN XAY LAP THUONG MAI SMC-Factory No.1/MS-Footings Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation Revision History Revision 00 01 Date of issue 24/7/2015 01/8/2015 Purpose of issue (approved/ revision) For Review For Approval Submitted by ACSC Name Prepared by Lương Văn Lượng Reviewed by Phạm Vũ Nam Approved by Nguyễn Văn Trung Position Deputy Site Manager Site Manager Project Manager Date Signature Approved by KOA Checked by QA-QC QA-QC HSE KDA Position Date Signature Reviewed by Approved by Approved by Client Name Prepared by Reviewed by SMC-Factory No.1/MS-Footings Position Page Date Signature CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation METHOD STATEMENT FOR RC FOOTINGS Contents SMC-Factory No.1/MS-Footings Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation INTRODUCTION 1.1 PURPOSE The purpose of this Method Statement is to set the policy for construction procedures and quality according to Contract Specifications To outline the work instruction by which RC Footings is carried out 1.2 DEFINITIONS: PROJECT PARTICULARS: Project name : SMC MANUFACTURING (VIET NAM) FACTORY-PHASE PROJECT Address : Long Duc Industrial Park, Long Duc Ward, Long Thanh District, Dong Nai Province, Viet Nam PARTY: Client/ Owner : SMC MANUFACTURING VIETNAM CO., LTD Contractor : KAJIMA OVERSEAS ASEA PTE LTD Responsible for the supervision of Contractors who will construct the podium and all related activities as outlined in this procedure SCOPE OF WORK The works to be carried out by Sub-Contractor (ACSC) and shall apply for works at Factory No.1 of SMC MANUFACTURING (VIET NAM) FACTORY- PHASE PROJECT Construction Reinforcement Concrete Structure works included: a Pile head treatment b Earth work c Formwork d Reinforcement Steel Rebar work e Concrete work Finishing works included: a Brick work b Plaster work c Painting work d Tiling work (Wall & Floor) BUILDING DESCRIPTION: Location: SMC-Factory No.1/MS-Footings Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation Factory No.1 are located at the corner of Road No.D5 &N2-5 in Long Duc Industrial park as below Factory No Description: - Building purpose : Factory Foundation : Spun piles (D300, 350, 400 mm) Structure :RC structures + steel rafter; Slab on grade Dimensions: o Factory  140m long (14x10m); 60 (4x15m) - 69m wide  Ground Floor (FL 0.00m); 1st Floor (FL +7.25m)  Height : 11.40m o Utilities area: x (120m long, 4.5m wide) SMC-Factory No.1/MS-Footings Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation GROUND FLOOR PLAN - Floor load: o Factory Ground Floor o WC Ground Floor o Stair case o Storage/Utilities : 40 KN/m2 : KN/m2 : KN/m2 : 10 KN/m2 Thay mat cat bang ban ve moi CROSS SECTION OF FACTORY No.1 - Slab thickness: SMC-Factory No.1/MS-Footings Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation o o o - Area: o o Factory Ground floor slab : 300 mm thk Storage/Utilities Ground Floor slab : 150 mm thk 1st Floor slab : 140 mm thk Ground floor + Factory area + Storage/Utilities area 1st Floor SMC-Factory No.1/MS-Footings : 9561 m2 : 8400 m2 : 1161 m2 : 9561 m2 Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation ORGANIZATION CHART 3.1 Organization Chart Project Manager NGUYỄN VĂN TRUNG (MP: 090 330 7742) nguyenvantrung@acsc.com.vn Site Manager PHẠM VŨ NAM (MP: 093 767 6736) phamvunam@acsc.com.vn Deputy Site Manager Deputy Site Manager NGUYỄN HOÀNG TRINH (MP:090 291 1235) LƯƠNG VĂN LƯỢNG (MP: 093 734 3055) nghoangtrinh@acsc.com.vn luonglv@acsc.com.vn Site Engineers QA&QC Nguyễn Minh Tuấn (MP: 098 314 5069) Trần Văn Nghiệp (MP: 090 935 6020) tranvannghiep@acsc.com.vn Trần An Toàn (MP: 090 803 3934) Trương Thanh Việt (MP:093 872 2730) QS Lê Trọng Thức (MP:098 967 4457) Procurement& logistics Thái Doãn Long (MP:097 799 7711) thaidoanlong@acsc.com.vn Shop Drawings Hoàng Văn Hải (MP:908 818 1059) Safety Supervisors Phạm Văn Mạnh (MP:097 235 2459) Nguyễn Văn Triểu (MP:093 996 0180) Construction teams SMC-Factory No.1/MS-Footings Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation 3.2 Assignment Position Site Engineer QA&QC Engineer Safety Supervision SMC-Factory No.1/MS-Footings Factory No.1 NGUYỄN HOÀNG TRINH NGUYỄN MINH TUẤN LƯƠNG VĂN LƯỢNG PHẠM VĂN MẠNH Page Factory No.9 TRẦN AN TOÀN TRƯƠNG THANH VIỆT TRẦN VĂN NGHIỆP NGUYỄN VĂN TRIỂU CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation FLOW CHART AND DIRECTION OF WORK The work sequence of construction the RC footings is shown at the following flow chart Excavation foundation Lean concrete Pile head treatment Formwork fabrication Installation of form work Rebar fabrication Installation of rebar Casting concrete Curing concrete Back filling SMC-Factory No.1/MS-Footings Page 10 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation TOOL & EQUIPMENT The equipment to be used for the construction of Footings is listed below Item Description Unit Q’ty Dump Truck 10 tons capacity Nos Back hoe L= 4.5m, capacity 0.70m3 ea Submersible Pump inches, minimum H=24m Nos Stand by pump for dewatering Rammer Nos 10 Compacting backfilled soil Plate compactor Nos Compacting for lean concrete Concrete Vibrator Nos Concrete cutter Nos Nos Gas cutter Nos Use for cutting surplus pile rebar Straightening machine Nos Use for reinforcing steel work Diameter 10mm : SD390, B15-B35 c/ Form work: - Plywood, 18mm thk reinforced with steel box 5x5 (cm), 4x8 (cm) MATERIALS HANDLING, STORAGE AND DELIVERY - - - Concrete: Ready- mixed concrete are transported from batching plant to site in concrete truck (6 to 12 m3 capacity) The concrete must be delivered to site within maximum 60 minutes depend on the mix design of concrete supplier Formwork: Formwork will be pre-fabricated then stocked on yard with protection of plastic cover Before installing, the formwork will be transported to site and placed near the excavation Steel rebar: Steel bars are stored on the steel platform or concrete blocks to prevent the contact of steel rebar with the ground All steel rebar are stocked in the steel yard with roofing and cover with plastic sheet to protect them with rain water Other materials are keeping in storage and they are transported to the site work when they are in used 10 PREPARATION WORKS - Excavation foundation + Receiving the construction area transited by KOA + Receiving the coordinate, benchmark system from main Contractor (KOA) + Clearing the ground and remove any obstruction on the ground + Set up drainage system for rainwater and underground water inside and outside pit + Prepare internal road from the excavation to the stock yard of surplus soil + Setting out excavations with their center lines, dimension and marking on the ground - Pile head treatment + Completing piling work by other Contractor + Completing the excavation works + Completing the lean concrete + Manufacturing the steel plate of pile cap starter bars + Marking the cutting level of the piles + Preparing and check the cutting machine - Casting lean concrete + Completing the excavation above design level about 100mm high + Drainage and pump water regularly, keep the pit dry + Trimming the surplus soil by hand to the design elevation + Compacting the base of foundation and testing, if required SMC-Factory No.1/MS-Footings Page 13 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation - Installation of form work + Completing lean concrete + Setting out and marking the gridlines and dimensions of footings on lean concrete surface + Pre-fabricate formwork + Cleaning and applying release agent on formwork surface, if required - Installation of rebar + Shape and dimension of rebar + Machine for fabricate rebar + Obtaining the approved Shop drawings - Casting concrete + Inspecting of rebar and formwork (record, pictures) + Prepare internal road for delivery concrete + Cleaning formwork, lean concrete's surface, pump water out of pit + Check finishing level of concrete + Covered starter rebar by PVC sheet before casting + Prepare bucket or slide for casting from top to bottom + Order the concrete SMC-Factory No.1/MS-Footings Page 14 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation 11 CONSTRUCTION METHOD 11.1 Excavation foundation • • Step 1: Survey and mark the foundation on the ground Step 2: Excavate the soil: Using backhoe machines (0.7 m3) to excavate the soil Factory No.1 is divided into three zones: zone (axis A-E/ 1-6); zone (axis A-E/ 7-11), zone (axis A-E/ 12-15) zone zone 60000 15000 15000 4500 zone 4500 15000 15000 F DN 3000 10000 10000 10000 10000 10000 10000 10 000 10000 10000 10000 10000 10000 10 000 10000 14 0000 10 11 13 12 15 14 zone 4500 TEMPORARY ROAD 15000 BACK HOE MACHINE NO.1 15000 SOIL MASS BACK HOE MACHINE NO.2 15000 60000 MOVEMENT DIRECTION 4500 15000 SOIL MASS 3000 10000 10000 10000 10000 10000 10000 10000 10000 10000 10000 10000 10000 10000 10000 140000 SMC-Factory No.1/MS-Footings Page 15 10 11 12 13 14 15 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation • Step 3: Transportation and disposal surplus soil a Stocked soil: Surplus soil will be transported to the soil reservation location on the site designated by KOA For the back filling process, the soil is gathered as masses which less than 1.5m height and more than 1.5m distance far from the edge of opening hole It is temporary covered by canvas to prevent the dust and used for back filling process later The volume of soil stocked on construction area (for backfilling) are calculated based on the excavated soil deducted the volume of concrete of footings and stump columns occupied in excavation The volume of excavated soil, volume occupied with concrete and remaining stock soils are shown in table below: VOLUME OF EXCAVATED SOIL (m3) No Excavation Location F1-F2 A-A1 F1 F2 FOUNDATION COM A/7 F11 F2 F12 F1-F1 F1-F2 A E-E1 F1 F2 F2A-F2 E-E1 F2A F2 FOUNDATION COM E/7 11.0 11.0 11.0 Page 16 Volume 213.47 207.57 1.00 2.00 1.00 1.00 2.00 8.00 8.00 8.00 4.00 4.00 4.00 41.16 28.38 31.19 46.85 155.25 150.96 75.11 83.02 1.00 2.00 1.00 F11 F2 SMC-Factory No.1/MS-Footings Q’ty 41.16 28.38 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation 1.00 2.00 1.00 1.00 39.0 8.00 8.00 3.00 3.00 F12 F1-F1 F1 F2 E E1/10 E1/10 10 11 12 13 14 F3 F2A F1A F3A F2 TOTAL EA-E/2-14 A-E/1_A-E/15 A-E/1_A-E/15 A-E/1 A-E/15 31.19 46.85 10.74 20.50 812.03 140.55 85.92 65.96 61.51 2,377.74 VOLUME OCCUPIED BY RC STRUCTURES (m3) A FOUNDATION F1( -1800) F1(-2600) F1A(-1800) F2( -2100) F2(-2800) F2A(-2000) F3(-1600) F3A(-2100) B STUPM COLUMN CA1 CA2 CA3 CA4 CA5 CA6 CA7 TOTAL     232.19 11.87 2.54 3.39 49.14 3.64 11.24 139.62 10.74 28 27 39 21.59 1.37 6.90 5.50 4.13 1.20 1.50 1.00 253.78 12 26 22 33 1 Volume of compacted soil to be backfilled= 2,377.74 – 253.78 = 2123.95 m3 Volume of compacted surplus soil to be removed= 253.78 m3 Volume of ripped surplus soil to be removed= 253.78 x 1.3 = 329.92 m3 Volume of ripped soil to be backfilled = 2123.95 x 1.3 = 2761.14 m where 1.3 is the coefficient of ripping The ripped soil to be backfilled will be stocked on construction areas at height 1.5m with quantity and volume as shown in table: No SMC-Factory No.1/MS-Footings Lot Q’ty Volume Page 17 Unit CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation LOT LOT LOT LOT LOT TOTAL 1 20 541.815 502.7625 488.09925 717.9 501.003 2,751.58 m3 m3 m3 m3 m3 m3 The location of stocked soil on site as shown in the attached drawing The surplus soil will be transported by truck to the stock yard (≈2000 m2) designated by KOA Remaining soil will be leveled at height of 0.5m from existing ground level ACSC Soil stock b De-watering excavation: Because of construction in rainy season, a collection pit (WxLxH: 50 x 50 x 50 cm) will be dig in each excavation outside the lean concrete area The water in this pit will be pump out the excavation through the hose directly to the nearest open drainage trench along the factory boundary 11.2 Lean concrete • Step 1: Trimming the soil: This work is carried out by digging to form an even and firm base at the right bottom levels of foundation SMC-Factory No.1/MS-Footings Page 18 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation • • • Step 2: Using the soil compactor to compress the soil to get the level K >= 0.95 Step 3: Using steel box 50x100 to manufacture the form work for foundation lean concrete layer Step 4: Casting lean concrete grade B10, stone 1x2 Welding line Lean concrete Steel box 50x100 11.3 Pile head treatment • • Step 1: Designated cut-off level should be marked by marker around concrete surface of the pile to keep cutting edge clear and the perimeter of cut-off level marking should be cut in about 20mm depth by small concrete cutter Step 2: Cutting the spun piles at the designed level After cutting, the eccentricity of the pile center should be surveyed and recorded (by others) The surplus segments of cut plie will be moved out of the excavation by excavator then transported and temporarily stocked in the designated stock yard Later all the remaining of cut piles will be moved out the site by ACSC SMC-Factory No.1/MS-Footings Page 19 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation REBAR - SD295A Ø12 - L=1000 VIEW "A" 600 100 50 300 CONCRETE INSIDE B20 STEEL PLATE Ø170x2mm 180 PILE CAP DETAIL STEEL BAR 2Ø10 60 180 300 60 VIEW A • • Step 3: Install the assembly of steel plate and rebar inside the pile head It is temporary by the wire fixed to 02 cross rebars on top of pile head Starter rebars are attached to steel plate by welding Step 4: Casting concrete B20 inside pile head and vibrating concrete 11.4 Formwork calculation: Formwork of footings are made of plywood 18mm thk and steel boxes 11.5 Installation of Form work • • • • • Step 1: Install the pre-fabricated formwork at the locations and dimensions, which are marked before Step 2: Fix the bottom of formwork with steel box, nails Step 3: Adjust the formwork to be plumb and straight with steel propping and adjusting jack Step 4: Fix the corners of formwork with nails and secure the formwork with adjusting jack against the stake on ground Step 5: Fill any gap of formwork with lean concrete with mortar SMC-Factory No.1/MS-Footings Page 20 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation Wooden plate thk 18mm SAFTY BARRICADE 1000 GFL± 0.000 Steel box 50x50mm Base jack 500 Steel box 40x80mm 75 ° 450450 Round tube steel D49 STEEL LADDER 590 700 1110 Refer to bottom level of foundation DRAINAGE HOLE 1110 2000 590 TYPICAL ELEVATION OF FORM WORK INSTALLATION FOR FOUNDATION Wooden plate thk 18mm Steel box 50x50mm Base jack Steel box 40x80mm Drainage hole Round tube steel D49 TYPICAL LAYOUT OF FORM WORK INSTALLATION FOR FOUNDATION 11.6 Steel works • • • • • • Step 1: Cleaning rebar surface Step 2: Fabricate the steel rebar by cutting, bending in compliance with approved shop drawings Tagging the steel rebar Step 3: Transport the fabricated steel rebar to site Step 4: Marking the positions of rebars on lean concrete surface and place the rebars in sequence bottom first and then top Position for lap and lap length as direction Step 5: Tie the steel rebars securely with wire in correct positions and distance Step 6: Insert spacers under and outside of steel cage to form the concrete cover SMC-Factory No.1/MS-Footings Page 21 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation REBAR SPACER TYPICAL LAYOUT OF REBAR INSTALLATION FOR FOUNDATION 11.7 Concrete work • Step 1: Delivered ready-mixed concrete will be checked of slump as regulation, slump for foundation should be 8÷10 cm Step 2: Concrete will be poured to formwork with chute or concrete pump, depend on the distance from the concrete truck to the footings Step 2: Concrete will be poured layer by layer Each layer should be less than 0.5m, casting form inside to outside, form far to near Step 3: Using vibrator for compaction of concrete Vibrating distance is less than 50cm, and duration of each vibration is not less than 10 second Step 4: Check the finished top level of concrete surface and remove surplus concrete Step 5: Finishing the concrete surface with troweling • • • • • SAFTY BARRICADE COVER SHEET 500 GFL± 0.000 S TART REBAR STEEL LADDER Refer t o bottom level of foundation 590 700 1110 1110 2000 590 DRAINAGE HOLE CASTING CONCRETE • Step 6: Curing concrete After 12 hours casting concrete, the surface of RC footing is covered by a hessian Spraying water at least times per day (sunny day) Curing concrete is not less than 05 days SMC-Factory No.1/MS-Footings Page 22 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation SAFTY BARRICADE GFL± 0.000 COVER SHEET START REBAR 500 HESSIAN SHEET STEEL LADDER 700 2000 CURING CONCRETE 11.8 Back filling + Marking the elevations of each backfilled layer on footing/stump columns The thickness of each layer is not exceed 0.3m/ layer + Backfill the excavation with excavated soil layer by layer + Leveling the soil + Compacting using rammer to reach the designed compaction ratio K≥ 0.95 + Repeat the backfill and compaction until reach to the finished level 12 QUALITY CONTROL With regards to the quality control, all works shall be carried out following the established Project Quality Control Plan Method to treat mistake or defect during constructing: - Excavation foundation: + Locate position of project by survey machine + Determine the level of bottom slab by leveling machine + Check dimension of pit by tape + Tolerance for border, center line, dimension of pit: ± 20cm - Lean concrete: + Check the surface by survey machine, tolerance ±1cm - Installation of form work + Check by leveling machine, tape: Axis tolerance ±8mm; Tolerance for the whole foundation height ±20mm + Check tightness of formwork by visual + Check rigidity and stability of bracing - Installation of rebar SMC-Factory No.1/MS-Footings Page 23 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation + Checking material: certificate, check dimension by caliper, take the sample for checking physical-mechanical + Check the length, number, position, anchor length, joint by visual and ruler + Thickness of protection: checking by tape + Tolerance for installation: Spacing among main rebars: 20mm, Stirrups spacing: 10mm + Tolerance for protection layer: Foundation: 10mm + Tolerance for fabrication: The whole length: 20mm, bending: 20mm + Lap length: Rebar SD390 Ribbed bar: 40d (tensile), 15d (compressive) - Casting concrete + Level tolerance on surface: 20mm + Horizontal tolerance of section: ± 8mm Back filling + Inspect each layer after compacting + Testing compaction factor as technical requirements and method of owner SMC-Factory No.1/MS-Footings Page 24 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation 13 SAFETY PLAN With regard to health and safety control, all the works shall be carried out following the established Project Occupational Health and Safety Control Plan (ST-PL-POHSCP) No Description of job Excavation works Hazards +Traffic accident during mobilization/dem obilization + Accident during excavation and transportation the soil + The soil around of foundation can be slide Hazard events Injury or death to workers or operators Preventive measures + Security standby and control public traffic Mobilization/demobilization should not carry out during heavy traffic jam (morning time/evening time) + Excavator should observe roads speed limits + Follow strictly the method to prevent the landslide Heavy objects must stand by at least 1.5m from the edge of opening excavation + Apply the barrier, ribbon & signboard to prevent the workers fall down to the pit + Excavator driver must has license, excavator must be verify certificate and good active status Action by Forman / Supervisor / Worker Pile cap treatment Injury of people/worker + Workers must alert when they start breaking work + Workers wear protective equipment during breaking works Forman / Supervisor / Worker Form and Re-bar Installation and Concreting Works Fall down of concrete equipment accessories worker hit by these falling objects Fall down of concrete equipment accessories worker hit by these falling objects Injury of people/worker Forman / Supervisor / Worker Removal or dismantling forms or any temporary structures Backfilling works Workers struck or hit by falling fill materials or any objects Workers struck or hit by falling fill materials or equipments Injury of people/worker + Workers must alert when installation of heavy steel materials and during welding works + Wear protective equipment during installation and concreting works + Provide qualified person nels to and supervise the job Injury of people/worker Provide proper equipment platform and qualified signal man for dump trucks unloading backfill materials Unsanitary Site Condition Scattering of dirt/garbage and some chemicals Damage to neighborhood inhabitants + Avoid leaking of chemicals and other solution SMC-Factory No.1/MS-Footings Page 25 + Keep the site clean before Forman / Supervisor Forman / Supervisor Forman / Supervisor / Worker CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation stop working Machinery & Other Equipment Oil spillage to earth Damage to neighborhood inhabitants 14 APENDIX Appendix-1: Working Drawing Appendix-2: Construction Schedule Appendix 3: Catalog of TEKCOM Plywood SMC-Factory No.1/MS-Footings Page 26 + To make sure all machinery free of oil leak + Repairing/maintenance of machine and other equipment should be done with proper way to avoid oil spillage to earth/ drain Forman / Supervisor / Worker [...]... Quality Control Plan Method to treat mistake or defect during constructing: - Excavation foundation: + Locate position of project by survey machine + Determine the level of bottom slab by leveling machine + Check dimension of pit by tape + Tolerance for border, center line, dimension of pit: ± 20cm - Lean concrete: + Check the surface by survey machine, tolerance ±1cm - Installation of form work + Check... 450450 Round tube steel D49 STEEL LADDER 590 700 1110 Refer to bottom level of foundation DRAINAGE HOLE 1110 2000 590 TYPICAL ELEVATION OF FORM WORK INSTALLATION FOR FOUNDATION Wooden plate thk 18mm Steel box 50x50mm Base jack Steel box 40x80mm Drainage hole Round tube steel D49 TYPICAL LAYOUT OF FORM WORK INSTALLATION FOR FOUNDATION 11.6 Steel works • • • • • • Step 1: Cleaning rebar surface Step... Designated cut-off level should be marked by marker around concrete surface of the pile to keep cutting edge clear and the perimeter of cut-off level marking should be cut in about 20mm depth by small concrete cutter Step 2: Cutting the spun piles at the designed level After cutting, the eccentricity of the pile center should be surveyed and recorded (by others) The surplus segments of cut plie will... Installation of form work + Completing lean concrete + Setting out and marking the gridlines and dimensions of footings on lean concrete surface + Pre-fabricate formwork + Cleaning and applying release agent on formwork surface, if required - Installation of rebar + Shape and dimension of rebar + Machine for fabricate rebar + Obtaining the approved Shop drawings - Casting concrete + Inspecting of rebar... Install the assembly of steel plate and rebar inside the pile head It is temporary hung by the wire fixed to 02 cross rebars on top of pile head Starter rebars are attached to steel plate by welding Step 4: Casting concrete B20 inside pile head and vibrating concrete 11.4 Formwork calculation: Formwork of footings are made of plywood 18mm thk and steel boxes 11.5 Installation of Form work • • • • •... pump water out of pit + Check finishing level of concrete + Covered starter rebar by PVC sheet before casting + Prepare bucket or slide for casting from top to bottom + Order the concrete SMC-Factory No.1/MS-Footings Page 14 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI 2 Architects & Construction Service Corporation 11 CONSTRUCTION METHOD 11.1 Excavation foundation • • Step 1: Survey and mark the foundation on... vibrator for compaction of concrete Vibrating distance is less than 50cm, and duration of each vibration is not less than 10 second Step 4: Check the finished top level of concrete surface and remove surplus concrete Step 5: Finishing the concrete surface with troweling • • • • • SAFTY BARRICADE COVER SHEET 500 GFL± 0.000 S TART REBAR STEEL LADDER Refer t o bottom level of foundation 590 700 1110 1110... and more than 1.5m distance far from the edge of opening hole It is temporary covered by canvas to prevent the dust and used for back filling process later The volume of soil stocked on construction area (for backfilling) are calculated based on the excavated soil deducted the volume of concrete of footings and stump columns occupied in excavation The volume of excavated soil, volume occupied with concrete... No.1/MS-Footings Page 21 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI 2 Architects & Construction Service Corporation REBAR SPACER TYPICAL LAYOUT OF REBAR INSTALLATION FOR FOUNDATION 11.7 Concrete work • Step 1: Delivered ready-mixed concrete will be checked of slump as regulation, slump for foundation should be 8÷10 cm Step 2: Concrete will be poured to formwork with chute or concrete pump, depend on the distance from... design of concrete supplier Formwork: Formwork will be pre-fabricated then stocked on yard with protection of plastic cover Before installing, the formwork will be transported to site and placed near the excavation Steel rebar: Steel bars are stored on the steel platform or concrete blocks to prevent the contact of steel rebar with the ground All steel rebar are stocked in the steel yard with roofing