Underground utility mapping using GPR technology for NCC Ltd

 

Scope of Work:

The scope of project is to map the underground utilities at the proposed location of Project SeaBird Phase-II, Karwar. The purpose is to scan the areas upto 6m depth to map all possible utilities including sewer line, cables, waterline or any similar pipeline for the smooth operations during construction phase.

Location:

Project Seabird Phase II, Karwar, Karnataka

Client:

Nagarjuna Construction Company Ltd. (NCC)

Equipment:

GSSI SIR 4000 and SIR 3000 equipped with 200 MHz and 400 MHz center frequency antenna.

Challenges:

Surface undulations due to partial hilly terrain and ongoing construction work disturbed the machine movement, unfavourable climate condition, remote location.

Summary:

The GPR survey has been carried out at Project Seabird Phase II near Karwar in Karnataka. The scope of the work includes the mapping of all the possible utilities in the area, up to the depth of around 6 m using non-destructive Ground Penetrating Radar technology. The purpose of the survey was to map all the possible underground utilities including cables, water pipelines, gas lines, sewerage in order to prevent the damage to the same during development of Phase-II activities including construction of housing and residential complexes at multiple locations. Considering the client's requirements and the expected depth of the utilities, the area has been surveyed using 200 MHz and 400 MHz center frequency antennas mounted with SIR 3000 and SIR 4000 GPR systems to cover the depth up to 6 m with fair resolution. The data has been collected in longitudinal and transverse direction, to scan the whole area in Grid pattern. The area was scanned up to the maximum accessibility of the machine movement in both the direction.

 
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