... formulization for the critical hydraulic head difference against seepage failure, H c , is possible. The hydraulic head differences at the onset of deformation, H y , for the half model soil, original test soil, and real soil must be plotted at the same point on the non-dimensional relationship, when...

..., Japan Public Works Bureau, City of Osaka, Nanko Kita, Suminoe Osaka, Japan ABSTRACT On excavating soil in areas with a high ground water level, seepage of water is a problem. When the hydraulic head difference between the up- and downstream sides, H, is too large, seepage failure occurs at the base...