The Application And Research Of GPR In The Tunnel Diseases Detection

Based on the Dielectric constant differences between the tunnel lining with the rock and disease, this paper use ground-penetrating radar (GPR) to detect the quality of the tunnel. When applying ground-penetrating radar to detect the lining quality, in accordance with different objectives of the waveform characteristics of different geological data and design information, we can be divided into the lining thickness, reinforced the location and layout, location and type of defects and interference signals, and so on.In order to resolve the difficulties in applying GPR to reinforce concrete structures, a series of studies have been made in this paper. based on design parameters of the reinforced network of tunnel to product the test model, and use of ground-penetrating radar and 400M antenna to detect, through test data on these in-depth study, the initial realization of the reinforced the exact location of quantitative description. Affecting the accuracy of the depth of speed, the paper cited a speed of eight kinds of methods for the eight methods and the advantages and disadvantages, in practical work under the scene of choice or the best way is to use a variety of methods or mutual authentication to improve accuracy.Through this research shows that, in accordance with the date obtaining by ground-penetrating radar, the combination of geological data to identify and design information to judge the geophysical anomaly, can be accurately inferred from the thickness of the tunnel lining, reinforced the internal layout, with empty and non-compacting .. The results showed that ground-penetrating radar in the tunnel lining the quality of inspection, is practical and accurate.