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Excavation method rectified 13-11-2010

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Excavation method rectified 13-11-2010

  1. 1. Doc. Title Method Statement of Building Work – Earth Work TOA-TOYO JOINT VENTURE Doc. No CM – MS – BW - 008 Rev. No. 0 Date Nov, 2010 Construction of Port Facilities and Buildings for Cai Mep International Container Terminal CAI MEP INTERNATIONAL CONTAINER TERMINAL METHOD STATEMENT OF EXCAVATION WORK Page 1
  2. 2. Doc. Title Method Statement of Building Work – Earth Work TOA-TOYO JOINT VENTURE Doc. No CM – MS – BW - 008 Rev. No. 0 Date Nov, 2010 Construction of Port Facilities and Buildings for Cai Mep International Container Terminal CONTENT 1. Purpose Page 3 2. Scope of Work Page 3 3. Reference Technical Specifications Page 4 4 Reference Drawings Page 4 5 Excavation Procedures Page 5 6 Quantity Control Page 8 7 Safety Control Page 8 8 Appendix 1 Page 10 Page 2
  3. 3. Doc. Title Method Statement of Building Work – Earth Work TOA-TOYO JOINT VENTURE Doc. No CM – MS – BW - 008 Rev. No. 0 Date Nov, 2010 Construction of Port Facilities and Buildings for Cai Mep International Container Terminal 1. PURPOSE This Method Statement is prepared to ensure that construction of buildings for the project shall comply on plans specifications and all relevant standard and code requirements in the execution of different work activities to be performed in the construction of buildings and other relevant structures associated with the project in general. In addition, this will serve as a tool to guide all technical personnel and layman execute proper construction procedures complied with the quality and safety plans for the project. 2. SCOPE OF WORK The scope of work for the construction of all Building and its utilities: · Expansion excavation: No. Building name Storey Structure 1 Security Office 1 RC Structure 2 Amenity Block 2 RC Structure 3 Container Freight Station (CFS) 1 + M RC & Steel Structure 4 Container Gate 1 RC & Steel Structure 5 PMB Branch Office 2 RC Structure 6 Operation Building 4 RC Structure 7 Maintenance Shop 1 + M RC & Steel Structure 8 Sub Station 1 RC Structure 9 Reefer Rack 1 RC & Steel Structure 10 Miscellaneous structures 1 R C & Steel Structure · Excavation to be used sheet pile: Page 3
  4. 4. Doc. Title Method Statement of Building Work – Earth Work TOA-TOYO JOINT VENTURE Doc. No CM – MS – BW - 008 Rev. No. 0 Date Nov, 2010 Construction of Port Facilities and Buildings for Cai Mep International Container Terminal No. Building name Storey Structure 1 Septic tank 1 RC Structure 2 Fuel Station 1 RC Structure 3. REFERENCE TECHNICAL SPECIFICATION Refer to Division 01 - Part 3 and Division 01 - Part 4B – Volume 2 of Technical Specification 4. REFERENCE DRAWINGS Refer to attachment of Excavation Shop Drawing and Excavation Sequence Drawing. 5. EXCAVATION PROCEDURE Page 4
  5. 5. Doc. Title Method Statement of Building Work – Earth Work TOA-TOYO JOINT VENTURE Doc. No CM – MS – BW - 008 Rev. No. 0 Date Nov, 2010 Construction of Port Facilities and Buildings for Cai Mep International Container Terminal 5.1 Flowchart 5.2 Manpower and Equipment Page 5 Completion of pile Preparation and Survey work for positions of Excavation Start Excavation constructing the Drainage Discharge water by pump Excavate up to designed level, cutting piles (if required) Excavate by small bucket or manual between piles Compact the bottom and cut the pile at designed level Foundation works Sand backfilling Finish works
  6. 6. Doc. Title Method Statement of Building Work – Earth Work TOA-TOYO JOINT VENTURE Doc. No CM – MS – BW - 008 Rev. No. 0 Date Nov, 2010 Construction of Port Facilities and Buildings for Cai Mep International Container Terminal - Manpower shall be organized in accordance with table 1 No Description Quantity Remarks 1 Engineer 1 2 Surveyor 1 3 Foremen 1 4 Worker 30 5 Safety officer 1 Table 1 - Equipments to be used for the work in accordance with table 2 No Description Quantity Remarks 1 Backhoe 02 2 Dump Truck 03 3 Level Machine 02 4 Water Pump 05 Table 2 - Certificate of operator and equipment shall be submitted by separated document to the Engineer for review and approval. 5.3 Detail Procedure 5.3.1 Preparation and Survey work - Prior to the commencement of excavating works, the surveyor will establish control points in suitable locations to control excavating area, confirming the construction drawings of excavation areas to be attached as addition to this method statement distribute details to all concerned parties as required. 5.3.2 Excavation work - Excavation shall be done in a safe and sequential manner on the basis of the prepared plan drawings and in accordance with the instructions by the Engineer. - The excavation method is either machine, manual cut or both and take care it to not disturb the soil below. - During excavation, it is necessary to make drainage ditch slope to sump pit as precaution in case raining and ground water occurs during construction. - Ground water will be drained by water pump with hose line is allocated to sump pit then discharge to the river. Contractor shall monitor ground water level and continuously run the Page 6
  7. 7. Doc. Title Method Statement of Building Work – Earth Work TOA-TOYO JOINT VENTURE Doc. No CM – MS – BW - 008 Rev. No. 0 Date Nov, 2010 Construction of Port Facilities and Buildings for Cai Mep International Container Terminal dewatering pumps to maintain dry working platform when ground water is encountered. Additional pumps will be added if the pumping capacity is insufficient. - Excavated soil to be loaded to dump truck and transported to the stockpile. Unsuitable material and waste material shall be removed from site to the waste yard in accordance with the specification requirements. 5.3.3 Excavation up to design level - During excavation, pile may be cut above the design cutoff level if necessary. Excavation shall be taken care between the piles using small bucket (< 0.5 m3) or manual shoveling. - After completion of excavation, dimensions and elevation of bottom area will be checked by surveyor. The bottom will be leveled and compacted. 5.3.4 Sand back filling - After completion of foundation concrete work and other concrete work under the ground, sand back filling will be executed in uniform horizontal layers across the full area of the foundation without segregation. - Approved suitable material should be used for backfilling. Compaction standard shall be employed in the execution of this work. - Fill materials shall be distributed evenly to the backfill area to a specified thickness of compaction = 150mm thick and compacted by compactor to a specified compaction factor. Sprinkle water to the earth fill in compliance with the allowable moisture contents specified before start compaction. 5.4 Termite work · Material Page 7 Mat pm3 Typical section of excavation area
  8. 8. Doc. Title Method Statement of Building Work – Earth Work TOA-TOYO JOINT VENTURE Doc. No CM – MS – BW - 008 Rev. No. 0 Date Nov, 2010 Construction of Port Facilities and Buildings for Cai Mep International Container Terminal - Termite material shall be submitted by the separated document to the Engineer for approval before start work. · Application - Application procedure shall be submitted by the separated document to Engineer for approval before start the work. 6. QUALITY CONTROL · Compaction of Backfilling - After excavation, the bottom surface of pit shall be compacted to not less than 95% of maximum dry density by vibratory plate compactor and the slope shall be trimmed off to avoid collapse of pit wall. - The fill material shall be checked and accepted by the Engineer before carrying out the work. · Survey of excavated area - After completion of excavation, dimensions shall be checked and recorded as attachment 1. Tolerance of bottom elevation is ±10mm 7. SAFETY CONTROL · Fundamental Policy - “Safety is the First Priority" · Key Activities - Implementation of Safety & Health Education - Prevention of Heavy Machinery Accidents · Development and implementation of Activity - Implementation of Safety & Health Education - Pick up hazardous factors of each work activity and always reflect them at the safety meetings. Point out them every day at the meetings in order to let individual worker to renovate his safety consciousness. - Prevention of Heavy Machinery Accidents - Be consistent with inspection at beginning of works (including working ground), regular maintenance of machineries, designation of working area and provision of a proper signalman. · Others. Page 8
  9. 9. Doc. Title Method Statement of Building Work – Earth Work TOA-TOYO JOINT VENTURE Doc. No CM – MS – BW - 008 Rev. No. 0 Date Nov, 2010 Construction of Port Facilities and Buildings for Cai Mep International Container Terminal - Safety signboards and barricades shall be installed around excavated area. Security guard should observe all passengers around the site. Page 9
  10. 10. Doc. Title Method Statement of Building Work – Earth Work TOA-TOYO JOINT VENTURE Doc. No CM – MS – BW - 008 Rev. No. 0 Date Nov, 2010 Construction of Port Facilities and Buildings for Cai Mep International Container Terminal Appendix – 1 Excavation Shop Drawing Sequence Drawing Page 10

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