Below is given a safe work method statement for performing the excavation work for different purposes like piping, trenching, man hole and cable laying including building construction work etc.
The procedure is given in main steps and other considerations must be kept in the view.
Ensure all clearances from the concerned government departments are obtained before starting the trenching and excavation work. Selected working area should be barricaded to avoid accidents & damages.
Verify location of survey monuments in the area in which work is to be executed. If any disturbance due to excavation work is applicable ensure correct restoration to be done properly.
Mark required area to be excavated & locate the building limits with enough space for open cut excavation.
Clear remove from site ,obstructions to excavations, establish & maintain accurate lines & levels as required, provide batter boards, line stakes & templates & establish permanent reference lines & bench marks required.
Ensure suitable access / safe ramps provided for safety of all site personnel’s proper safety and PPE requirements to be followed.
Place signage such as Keep Out, Excavation is going on and Exclusion Zone & physical barrier to be erected around the excavation area where it is appropriate.
Excavation will be carried out to the lines, grades and levels as per the substructure requirements & level shall be checked at intervals to confirm with the drawings.
Excavation level for the determination of soil improvements must be based on Soil Investigation Report by Third Party Testing Laboratory.
Excavation procedure should be consider in Sloping, Common & Deep Excavation Areas with Proposed Shoring lines as per detailed in the Excavation Drawing Plan.
Excavation support system if needed shall be provided as per requirements & dispersion of dust shall be minimized during excavation work by suitable means.
Excavated material shall be stacked and removed from the working area in proper manner & to be hauled away to the approved designated disposal area.
Disposal Areas are as Follows:
- For Soil – As per Municipality Instruction
- For Concrete – Waste Management Recycling Area
Ensure excavated area is free of water by bailing, pumping or provide dewatering drainage system if required.
Keep bottoms of excavation clean & clear of loose materials, level stepped at changes of level except excavations made by drainage for slope purpose if required.
If removal of earth causes displacement of adjacent earth, remove disturbed earth as necessary.
Final excavation surface shall be levelled and well compacted to the specified level of compaction and the Soil at the level of foundation should not be disturbed.
Ensure that the area to be backfilled is clean from any debris wooden or other materials.
Inspection request to be raised, inspected & approved by concerned persons.