Ground Penetrating Radar

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Ground Penetrating Radar (GPR)
GPR Work in progress
GPR Survey in Progress

Geo Dynamics has recently acquired a Ground Penetrating Radar (GPR) system. GPR is a geophysical method that uses radar pulses to image the subsurface. GPR profiles are used for evaluating the location and depth of buried objects, voids, etc.

Geo Dynamics now offers a wide range of applications for various industries. Bridge professionals and structural engineers require effective methods for determining the condition of aging bridge decks, parking structures, dams or any other reinforced concrete structures. Now with GPR technology it is possible to assess condition of bridge decks, determine concrete cover and bridge deck thickness etc. Cutting and coring experts and construction professionals require a reliable, non-destructive means to locate targets such as reinforcement within concrete structures prior to drilling, cutting or coring.

GPR is the tool of choice based on ease of use, field-proven durability, and accuracy for locating rebar, post-tension cables and conduits as well as estimating slab thickness and detecting the presence of voids that can impact the structural stability of a concrete slab.

We also offer utility locating services (Typical output is shown in the Figure) - a reliable method to locate subsurface targets prior to digging, trenching, or conducting site assessments, and mapping. Now we can locate the depth and position of metallic and non-metallic pipes in real time, can identify and delineate voids under the surface, identify septic tanks, or underground storage tanks (USTs) using GPR.

GPR can also be used for road inspection to estimate pavement thickness, base and sub-base evaluations etc. Similarly railway ballast assessment can also be performed with GPR. Infact other than Civil Engineering applications GPR tool is very effective in archeological and forensic applications

Concrete Inspection – Typical Output

GPR Equipment

Utility locating – Typical Output

The following table provides various fields where GPR can be used as well as its general applications.

Field of Application General Application
Concrete inspection Concrete cover, rebar locating, conduits in concrete slabs, slab thickness, voids, Raft inspection
Bridge Inspection Deck thickness assessment, deck delamination, deck thickness
Irrigation departments, civil works Utility locating (Metalic/nonmetallic), duct banks, Underground storage tanks, septic tanks
Electrical and Plumbing Underground cables/piping, concealed wiring/conduits detection for residential and commercial buildings
Roadways Asphalt/Concrete thickness, base-subbase evaluations, void detection
Airports Runways, taxiways, aprons, hangar inspection
Geological and Geotechnical Underground void (sinkhole detection), water table mapping, bedrock profiling, Bathymetry, Stratigraphy
Railways Ballast condition assessment
Environmental Landfill delineation, ground waste investigations
Others Forensic, archaeology, mining
Geo Dynamics owns complete array of the antennas for various applications and we are sure that this innovative technology will be very effective and useful for the NDT industry.
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