Abstract
Organization of timely implementation of anti-deformation and repair work in tunnels and other objects of transport infrastructure requires a detailed analysis of the physical state of structures, and their individual elements. In recent years, a non-destructive ground penetrating radar (GPR) method is being increasingly used for this purpose. We present the results of GPR determination of electrophysical characteristics (refractive indices and electromagnetic radiation attenuation coefficients averaged within structural layers) of the highway road concretes in the tunnel using 1200–1700 MHz microwave radiation. The method of the GPR data processing is based on classical electrodynamics, and in practical implementation, it does not require additional integration with other geophysical or destructive testing methods. Various approaches have been applied in the calculations of electrophysical parameters of structural layers, which allowed estimating the errors of the computational schemes and approximations. The results obtained were used to clarify the dimensional parameters of the layers and determine the volumetric moisture content.
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