Method Statement for Backfilling Works

Method Statement Work method statement for Backfilling works Section A: - Introduction. This document describes a general procedures and method of work backfilling work along the retaining wall and any other areas where necessary at Tamdeen Square Residential Project. Works shall be carried out in compliance with the drawing and project specification. Equipment and Tools.  Heavy Equipment – Excavator, Dozer, Dump truck and etc.  Activities Equipment – Roller compactor, Plate compactor and Surveying level Materials  Sand  Water  Uncontaminated portions of the excavated soil Manpower (approximately)    

One engineers and two foremen. Two groups of direct labors containing 6 labors in each group. One Safety offers and one safety labor. One surveyor and two assistants.

Section B: Work Procedure 1. Scope  This procedure applies all backfilling work requested for the permanent work in accordance with the approved drawings. 2. Backfilling work preparation  Bed levels of backfilling area will checked and all foreign materials which are not required will be removed.( i.e. debris, shuttering materials, etc.)  Necessary equipment and tools ( Roller compactor, surveying tools, etc) will be arranged to be ready for work  Prepare access to the working area and plan for the dump truck and plant movements.

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Method Statement  Backfilling will be done using two types of materials.( i.e. Existing excavated soil and sand). Only the uncontaminated portions of the excavated soil were kept for this purpose and the rest of the material was already disposed. 3. Backfilling execution  Backfilling will be executed in layers and the thickness of the layers shall be maximum 30 cm in height.  Paint marks could be used on back of formwork/shoring surfaces to indicate the levels of each layers.  A routine investigation of levels of layers will be carried out by the surveying crew.  Back filling material will be filled and appropriate water quantity specified by the laboratory test report will be added. (The existing excavated soil to be used initially until the remaining quantity is over and then onwards sand will be used until the completion of work)  Soil will be spread in layers in accordance to the layer thickness. Each layer will be compacted either by plate or roller compactor depending on the size of the area to be filled.  At the end of each two layers of compacted soil the sand cone test shall be carried out to determine the compaction percentage. And test will be conducted in 3 locations per each layer of testing. The compacted (by submerging in water) sand layers sill be subjected to visual inspection. Section C: Inspections The three phases of inspection are: 1. Initial Inspection – checklist-01: The contractor will perform an initial inspection as soon as a bed levels of the backfilling are prepared to receive the backfilling. Upon the readiness of the work, contractor will submit an inspection request to the consultant for obtain the approval. This inspection request will verify the following items. a. b. c. d.

Starting levels of the beds. Cleanliness of the backfilling area. Readiness of the equipment, tools and materials Safe access to the backfilling area.

2. Intermediate Inspections (Soil layers): Checklist-02 to Checklist-x : The contractor will perform an initial inspection of the work i.e each compacted two soil layers and will conduct the sand cone test. Upon the readiness of the work, contractor will submit an inspection request to the consultant for obtain the approval. Page | 2

Method Statement 3. Intermediate Inspections (Sand layers): Checklist-(x+1) to Checklist-y : The contractor will perform an initial inspection (A visual inspection) of the work i.e each compacted two sand layers. Upon the readiness of the work, contractor will submit an inspection request to the consultant for obtain the approval. 4. Final Inspection (for final cleaning and leveling) – Checklist-(y+1): The contractor, upon the readiness of the work will submit an inspection request to the consultant for obtain the approval for the final cleaning and to check the final levels of the backfill. 5. Approved shop drawings, concrete dimension drawings and coordinate drawings are pre-requisite documents for performing a checklist, unless having a special consent from the engineer. 6. The successive work stages will be commenced only upon successfully obtaining the approval for its’ predecessor work stage. Section C: Safety The entire works will be carried out as per the guidelines established in the Project Specific HSE Plan. Utmost importance shall be given to safety of personnel and protection of services. It will be ensured that the personnel involved are thoroughly aware of the Employer Safety regulations. To achieve the above the following shall also be ensured:  Tool Box Meetings will be conducted before starting the works.  All personnel will be provided with suitable Personal Protective Equipment.  Proper and safe access will be provided for workmen to reach the work spot and carry out their works safely.  Necessary and essential lighting and ventilation will be provided during the course work.

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