Let’s talk a little about what GPR (Ground Penetrating Radar) is.
- Ground Penetrating Radar (GPR) is a radar system specifically designed to allow for the internal characterisation of subsurface investigation. It can be used on a wide variety of materials, most commonly soil, concrete and asphalt.
- Examples of uses of GPR systems include the detection and distinction of utilities in concrete and/or the ground (subsurface investigation) or the detection and distinction of faults / fractures in buildings or rock faces (infrastructure investigation).
- The internal characterisation of subsurface investigation or utility locating is achieved when an antenna transmits a radio-wave through a medium. This radio-wave travels through the medium and is reflected back as the composition of the medium alters; this may be due to a buried pipe, cable or a change in medium density. A receiving antenna detects this reflected radio-wave. When the receiving antenna detects a radio-wave, it is sent to the GPR system’s control unit. The control unit digitizes the radio-waves in real-time and displays them on a screen.
Additional GPR Applications:
GPR can be used to locate underground storage tanks (UST), grave location, forensic investigations and a wide variety of other buried objects.
Having successfully located buried pipes, drums and underground storage tanks, Ground Penetrating Radar can, under the right conditions, be used to identify the extent of any leakage and contamination. Likewise, the extent of landfill sites can also be determined.
Ground Penetrating Radar is a useful tool for the location, investigation and determination of the extent of footings and foundations. The number of trial pits (test pits, pot-holes) required to determine foundation and footing detail can be greatly reduced, saving both time and money.
Using Ground Penetrating Radar to map the subsurface, the location of possible archaeological artifacts, bones, etc. can be identified.