United States Department of Transportation
i
Ground penetrating radar evaluation and implementation.
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2014-07-01
[PDF-237.30 KB]
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Abstract:Six commercial ground penetrating radar (GPR)
systems were evaluated to determine the state-of-the-art of GPR technologies for railroad track
substructure inspection.
Phase 1 evaluated GPR ballast inspection
techniques by performing testing at the
Transportation Technology Center (TTC) in
Pueblo, CO. The evaluation was conducted at
the Facility for Accelerated Service Testing
(FAST) on the High Tonnage Loop (HTL).
Investigators from TTC compared the ballast
fouling and layer depth outputs of different GPR
systems. The outputs of the different systems
were compared with one another and with other
known conditions. Also, a moisture sensitivity
test was performed to confirm the ability of GPR
to sense relative changes in moisture.
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