关键词: 坝肩渗漏, 探测, 高密度电法, 测线布置, 土石坝

Abstract: Seepage is one of the main diseases of earth-rock dam. Seepage of dam abutment is a kind of common but special form, as its path is complex, the cause reasons are difficult to identify and the seepage maybe around abutment, through dam body or from the mountain beside the abutment. Based on the high density electrical method, the experimental research on abutment seepage of a reservoir dam in Nanjing is carried out. The high density electrical method is sensitive to low resistance abnormity area. The dam abutment is narrow and difficult to lay device. This difficulty is overcome by grid layout of test lines and the position and direction of seepage path in dam abutment is found out. By analyzing the relative change of the resistivity and the shape of contour lines, combining with the results of investigation and geological drill, the cause of seepage is found out. It proved that the high density electrical method is effective in the seepage detection of dam abutment.

Key words: seepage of dam abutment, detection, high density electrical method, line layout, earth-rock dam