The purpose of this procedure is to follow proper activities of survey works for setting of grid lines & recording of existing ground level to carry out excavation and other works in all buildings in the project as per the technical specification and standards.
It includes survey works for setting of grid lines & recording of existing ground level to carry out excavation for all types of foundations and other works in all buildings.
The work shall be carried out in accordance with the specifications and corresponding approved drawings.
Contract & tender documents and relevant drawings in totality or in part shall form the reference documents.
Job Responsibilities
Site In-Charge / Common services In-charge, shall report to the Construction Manager. He shall be responsible for control, supervision and direction for implementation of this procedure.
Site Engineer / Surveyor: Shall report to the Site In Charge / Common services in-charge and shall carry out the work as per the drawings and specifications.
QA/QC Engineer: Shall report to the QA/QC In-charge and shall carry out all necessary Lab / Field test.
QA Engineer shall carry out all field Inspection / Checking
Before start of work arrange necessary instruments & surveying equipment like Total station, theodolite, leveling instrument, Measuring tape, etc.
Surveying Procedure
Clean the site & level it with minor cutting/filling. Establish grid pillars at least 1 meter away from the actual excavation boundary.
Demarcation of the plot & marking the actual boundaries. Setting up of grid lines in both the directions & locating center line of column footings, retaining wall and compound wall.
Establish temporary benchmark for level control with reference to the benchmark provided by the client/customer.
Protect the benchmark with proper barricading to avoid any disturbance.
Before starting excavation all the pre levels to be recorded.
Record all the levels of the existing structure.
Check the required bottom level of PCC
Transfer the grid lines in both directions over the PCC
Check the top level of the footing & raft after casting.
Transfer the center line for Columns on the raft for column kickers.
Check the line of column after de-shuttering
Transfer BMs on column to facilitate level control of floor slab.
Related Records
- Check List for Survey Works
- Traverse Field Book
- Level Field Book
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