HSE DOCUMENTS-METHOD STATEMENT FOR BACKFILLING

 

HSE DOCUMENTS-METHOD STATEMENT FOR BACKFILLING

1.0. OBJECTIVE

The objective of this method statement and procedural document is to provide general technical guidelines for backfilling and compaction of earthwork with approved material.

2.0. SCOPE

This method statement highlights the activities of backfilling and compaction at specified project sites.

3.0. REFERENCES

Construction drawings & specifications

4.0. DEFINITIONS

4.1. M.D.D - Maximum Dry Density

4.2. HSE - Health, Safety and Environment

4.3. CAR - Corrective Action Request

4.4. O.M.C - Optimum Moisture Content.

4.5. QIP Quality Inspection Plan

5.0. RESPONSIBILITIES

1.1. Site Supervisor/Manager:

1.1.1. Oversees the entire construction project, including backfilling activities.

1.1.2. Ensures that backfilling is carried out according to the project schedule and specifications.

1.1.3. Coordinates with other project stakeholders to ensure a smooth workflow.

1.2. Excavation Crew:

1.2.1. Performs the initial excavation work to prepare the site for construction.

1.2.2. Responsible for digging trenches, foundation areas, or any other designated areas for subsequent backfilling.

1.3. Backfill Crew:

1.3.1. Specifically assigned to backfilling tasks after the excavation is complete.

1.3.2. Ensures proper compaction of backfill material to meet engineering and safety standards.

1.3.3. Collaborates with the excavation crew to maintain a synchronized workflow.

1.4. Civil Engineers/Geotechnical Engineers:

1.4.1. Provide technical expertise in designing backfill specifications based on soil analysis and project requirements.

1.4.2. Monitor and evaluate the backfilling process to ensure compliance with engineering standards.

1.5. Safety Officer:

1.5.1. Ensures that backfilling activities adhere to safety regulations and guidelines.

1.5.2. Conducts safety inspections and implements corrective actions to mitigate potential hazards.

1.6. Heavy Equipment Operators:

1.6.1. Operate machinery such as bulldozers, excavators, and compactors to perform backfilling tasks efficiently.

1.6.2. Responsible for the proper use and maintenance of equipment.

1.7. Quality Control Inspectors:

1.7.1. Conduct inspections to verify that backfilling meets specified standards.

1.7.2. Document and report any deviations from the project specifications.

1.8. Project Manager:

1.8.1. Manages the overall project, including backfilling work.

1.8.2. Coordinates resources, budgets, and timelines for successful project completion.

6.0. PROCEDURE

6.1. Quality Inspection Plan (QIP) specific to project requirements shall be made and inspection activities shall be recorded either in the formats as given under “Related Documents” or those supplied by the customer.

6.2. Locate the source of required material as per project drawings/specifications and get it approved by the customer. Use Doc. [Reference No. Here].

6.3. Establish the M.D.D/O.M.C for the material in the laboratory and get it approved by the customer. Use Doc. [Reference No. Here].

6.4. Use and Place the approved material as per project specification. The thickness of the layer should not exceed or more than the specified limit.

6.5. Mix the water uniformly in such a manner so that it should not exceed +/- 2% of O.M.C or as specified in project specifications.

6.6. Compact the material with specified equipment/machinery to the required [%] of compaction. The number of passes gotten during the test run should be carefully observed and utilized to get the maximum efficient results.

6.7. Submit the request to the customer/consultant for approval.

6.8. Check the compaction of the compacted layer jointly. Use [Reference No. Here].

6.9. Complete the record using Doc. No. [Reference No. Here].

6.10. Repeat the procedure till final levels are obtained.

6.11. In case of non-conformity at any stage of inspection, the segregation is covered by method statement: No. QA&QC/MS-[Reference No. Here] and Corrective Action Request (CAR) shall be raised as per standard operating procedure Doc. No. [Reference No. Here].

7.0. TOOLS AND EQUIPMENTS

7.1. Dozer

7.2. Front End Loader

7.3. Dump Trucks

7.4. Graders (if required), Bowsers

7.5. Roller (vibratory)

7.6. Compactor 

7.7. Wheelbarrows & Hand Tools

8.0. HSE INSTRUCTIONS

8.1. Work Permit will be obtained (if required) before backfilling and work is to be supervised by a competent person assigned by the site authority.

8.2. Workers will use Personal Protective Equipment-PPE (hard hat, gloves, goggles, etc.)

8.3. Backfilling and removal of trench supports shall be accomplished first by backfilling up a level allowing for the removal of the lower braces. 

8.4. Another backfill layer shall be placed in the trench to the next layer of braces to be removed accordingly.

8.5. Removal of trench supports/protective shields shall progress with the backfill from the bottom of the trench.

8.6. In unstable soil, ropes shall be used to pull out the jacks or braces from above after workers have cleared the trench.

8.7. All excavations shall be backfilled and compacted and the surface shall be left in good condition as soon as practicable.

8.8. The working area should be secured and cleared of items that may cause injury during work.

8.9. To avoid the fall of the persons, the area to be backfilled will be flagged off and lighted barricades installed to inform others if the area is left open overnight.

8.10. The area to be filled close to a road transited by motorized vehicles will be protected with concrete barriers to prevent vehicles from driving off into the area.

8.11. A Walkway Bridge will be installed if workers need to go over the area to be filled to reach their work areas. A bridge will be built at least 36 inches wide with railings and toe boards to enhance safety.

8.12. Any structure of steel/concrete/woodwork already present in/and around the area will be protected during Backfilling operation.

8.13. The back back-mirror along with the bank man must be used if backfilling is done by reversing dumpers etc.

8.14. The area will be assured free of workers, tools, etc. before backfilling.

8.15. Personnel will be kept clear of machinery whilst it is in operation, at a minimum safe distance of 5 meters.

8.16. Properly insulated and nonconductive tools should be used for electric work.

8.17. Minimize the disturbances to the natural drainage system.

8.18. Any liquid fuel spills and accidental waste disposal should be avoided and properly cleaned up.

8.19. Minimize the soil erosion.

8.20. Preserve your natural environment.

9.0. RELATED DOCUMENTS

9.1. Related Drawings/Customer’s Specifications.

9.2. Gradation

9.3. Particle Size Distribution.

9.4. Determination of Atterberg Limits.

9.5. Moisture Density Relationship of Soil.

9.6. Density Soil in Place by the Sand Cone Method.

9.7. Bulk Density and Mass of Sand in Cone.

9.8. Soil Compaction Check List

9.9. Building Works Inspection Record

9.10. Earth Work, Road Work & Flexible Paving

9.11. Inspection Report

9.12. Inspection Timing Sheet

9.13. Material Approval Form

9.14. Foundation Inspection Report

9.15. Corrective Action Request

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