Abstract
GPR (Ground Penetrating Radar) is non-destructive equipment coming to be accepted in diagnostics of road structures. The paper describes state-of-the-art of a GPR usage in several European countries in this field. Beside basic GPR applications in the field of road diagnostics like a determination of pavement layer depths and a location of joint dowel bars in concrete pavements the more complicated application possibilities are mentioned such as detection of voids under the concrete slabs of rigid pavements, detection of excessive amount of water in structural layers of pavements, determination of crack depth in the bituminous layers etc.
The situation in the Czech Republic is described in the paper and some projects concerning GPR testing, the author participated on, are mentioned.
KEYWORDS: high speed train, Thalys, railway superstructure, counter deflection.
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