Unexpectedly encountering buried obstructions can cause expensive unplanned-for and avoidable delays.
To minimise the risk of such an occurrence, a Ground Penetrating Radar (GPR) survey can be commissioned to produce a map of the significant underground features before commencing any construction works.
GPR can be used to locate most buried obstructions including foundations, tanks, air raid shelters, pile caps, concrete, culverts as well as pipes, cables and drainage, old mine shafts and tunnels.
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Ground Penetrating Radar transmits an electromagnetic signal into the ground and listens for reflections which are caused when that signal encounters (any) change in the electromagnetic properties of the material it is travelling through. This allows GPR to detect most kinds of underground features including old mine shafts, tunnels, foundations, obstructions, concrete, pile caps, culverts as well as pipes and drainage.
The results from a GPR buried obstructions survey will usually take the form of CAD drawings and a survey report. The final output may vary depending on the best way to represent the information.