GPR survey for subsurface utility mapping for BPCL at Navi Mumbai


Scope of Work:

GPR survey execution for mapping underground utilities to ensure clear stretch for smooth installation of new pipeline in Mumbai


Navi Mumbai, India.


Corrtech International Pvt Ltd.


GSSI SIR-3000 equipped with 200 MHz and 400 MHz antenna


The GPR survey has been carried out at proposed location of new pipeline installation at Navi Mumbai. The total length of road of width approximately 6-7 m scanned is approximately 1.4km. The scope of work includes the mapping of possible underground utilities upto the depth of around 3 m using non-destructive Ground Penetrating Radar technology. The purpose of the project is to plan the proper execution of proposed pipeline installation using horizontal drilling. Considering the client’s requirements and the expected depth of the utilities, the area has been surveyed using 400 MHz center frequency antenna mounted with SIR 3000 GPR system to cover the depth upto 3 m with fair resolution. The purpose of the survey was to map all the underground utilities viz. cables, water lines, gas lines, sewer line etc. upto the depth of 3 m using non-destructive technology (GPR). The whole data is collected in numerous parallel profiles across the width as well as along the length of the road at a spacing of 15 m and 2.5 m, respectively. Overall three utilities are observed along the road at distance of 1.5 m, 3.0 m and 4.8 m from footpath edge, respectively. These utilities were found at depth of 0.3 m, 1.1 m and 1.3 , respectively. Few higher reflection points are also marked in the drawing. Most of the utilities are found to be at an average depth of 0.5-0.9 m. However, no utility is found to exist at a depth greater than 1.3.

GPRcase study-corretech_mum
GPRcase study-corretech_mum
GPRcase study-corretech_mum
GPRcase study-corretech_mum