EXPERIMENT ON ACCURACY VERIFICATION AND IMPROVEMENT OF IMAGE INTERPRETATION OF GROUND PENETRATING RADAR BY ALUMINUM TAPE IN PAVEMENT STRUCTURE WITH BURIED PIPE

Abstract

 In this study, the ground penetrating radar exploration was performed on the pavement structure that was constructed with a subbase and an asphalt mixture layer, the experimental cases of the buried pipes were the PF pipes with aluminum tape attached inside the VP pipes and the VP pipes with aluminum tape attached, in order to improve the image interpretation by the ground penetrating radar. In addition, the underground spatial information was surveyed before and after construction so that the accuracy could be verified. As the result, it was found that the image can be interpreted by aluminum tape even in uninterpretable conditions in the constructed pavement structure. In addition, we also found a method that can improve image interpretation without replacing the VP pipe by inserting a PF pipe with aluminum tape attached into the VP pipe for the existing VP pipe. Furthermore, the relative error was within 13 % in each case.