Application of Borehole Radar to Buried Object Survey for Civil Engineering Purpose

P041 APPLICATION OF BOREHOLE RADAR TO BURIED OBJECT SURVEY FOR CIVIL ENGINEERING PURPOSE Y.YAMASHITA and T.TOSHIOKA 1 OYO Corporation Tsukuba Technical Research and Development Center 43 Miyukigaoka Tsukuba Ibaraki 305-0841 Japan Introduction In case of planning the underground constructions of utilities in urban area it is very important to detect and confirm such existing condition of artificial buried objects as the location or the physical dimensions. For example when constructing the utilities by means of jacking method it is necessary to confirm the existence of foundation piles or to know the distance between piles. When planning the river repair construction