VERIFICATION OF IMAGE INTERPRETATION OF GROUND PENETRATING RADAR BEFORE AND AFTER WATERING IN PAVEMENT STRUCTURE WITH BURIED PIPE WITH ALUMINUM TAPE ATTACHED

Abstract

 The presence of buried pipes is determined from images based on the presence or absence of upwardly convex curved stripes in the ground-penetrating radar exploration. In reality, the problems are that these stripes are not clear and can be overlooked in the case of small diameter pipes. Furthermore, it is known that ground penetrating radar is affected by the water, and the exploration is generally not carried out immediately after the rainfall. The authors have shown the effectiveness of the buried pipes with aluminum tape for the former problem. In this study, in order to verify the effect of the buried pipes with aluminum tape on the image interpretation immediately after the rainfall, the ground penetrating radar explorations were conducted on the pavement structure before and after the watering. As the result, the changes in the electrical properties were observed as the water content ratio of the pavement structure increased, but the image interpretations effect of the buried pipe with the aluminum tape were maintained even after the watering.