Laser Surveys

Topographical Surveys, Land Surveys, Building Surveys And Underground Drainage Surveying

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A Practical Guide For Underground Services Location and CCTV Drainage Surveys

GPR (Ground Penetrating Radar)

GPR does NOT trace services, but indicates the presence of voids, disturbed ground, trenches, pipes and cables under the surface.
GPR is an echo sounding method where a transmitter/receiver is passed over the ground under investigation. It is effective at mapping metallic and non metallic services. It is of limited use in conductive ground ( e.g. wet clay) or through reinforced concrete. It can give a comprehensive image of the sub surface including service depths, trench compaction and pavement construction thickness.
NB : GPR does not identify a particular service, only the likely location of a pipe or cable, and is best used in conjunction with radiodetection where possible.

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Last Updated Monday, August 8, 2005 15:56