GPR (Ground Penetrating Radar) is a geophysical tool used to measure changes and interfaces between material properties (dielectrics).
There are a number of applications for GPR in the areas of condition assessment:
Remaining pipe wall thickness:
Where original concrete or AC pipe wall thickness exceeds 30mm, detecting change in remaining wall thickness can generally be achieved with the use of high frequency antenna (typically 2Gig or higher).
Typical applications where this would be used is to determine locations of internal acid attack from gas pockets in pressure sewer mains in a non-invasive method.
Concrete reservoir and tank inspections:
High resolution GPR is used for measuring the reinforcing cover, concrete thickness, voids, and delamination.
GPR is also used on reservoir floors to assess integrity, cracks, leaks and voiding under the floor.
GPR is regularly employed to determine subsurface voids that can be created by infiltration or exfiltration of water from buried pipes.
Soil and moisture mapping:
GPR can be employed to determine soil changes and moisture content changes that can indicate potentially aggressive soils (higher potential corrosion risk locations).
In areas where environmental conditions limit typical acoustic leak detection methods, GPR can be used to locate undergrounds leaks.