2020 Volume 76 Issue 2 Pages I_1-I_9
The ground penetrating radar (GPR) surveys the overburden of underground pipe by interpreting the image, using the reflection from underground pipe and irradiating the electromagnetic wave from surface. In order to improve the image interpretation, the experiment was conducted with the inner diameter of 50 mm and 100 mm of the underground pipe by installing the steel plate, the vinyl chloride plate, and the aluminum tape on the underground pipe, respectively. As the result, it was found that even if the width of the steel plate was 50 mm, it was effective in improving image interpretation. It was found that the difference in the material rather than the shape can be expected to improve the image interpretation. It was found that the aluminum tape can be expected to improve image interpretation as well as the steel plate. On the verification of the measurement accuracy of the over-burden, it was quantitatively found that the measurement accuracy improves when the pipe diameter is large.
