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Radar surveys

JFTS' radar survey service provides a fast and highly efficient method of investigating what is happening below the ground.

Below ground surveying techniques are used to identify underground features, prior to excavating, piling, drilling and other construction processes.

Often associated with geological applications, radar surveys also apply to investigations into the integrity of concrete structures, the location of buried utilities, fracturing and subsidence monitoring.

High frequency antennae are suitable for near-surface investigations up to three metres. Lower frequency antennae can penetrate 20 metres plus and as such are used for examining larger, deeper features such as mine levels and landfills. In many circumstances the depth can be calibrated by scanning a target of known depth or by taking core samples at key locations over a site.

Applications for impulse radar include:

  • Civil engineering - mapping of steel reinforcement, voids and fractures within concrete structures; determination of pavement, wall and bridge deck thickness; assessing post tension ducts within bridge beams; detection of old foundations and mine working; mapping of subsurface solution features in limestone and chalk environments; and performing bedrock surveys
  • Environmental -  location of buried structures, objects utilities and pollutants; detection of old mine workings; location and monitoring of landfill sites and contaminant plumes; and location of buried drums, tanks and waste
  • Police forensic and UXO - location of disturbed ground
  • Archaeology - location of buried walls and disturbed ground
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