SEEPAGE-SEISMIC COUPLED BEHAVIOR OF SMALL SCALE EARTH DAMS CONSIDERING COUNTERMEASURE TECHNIQUES

Abstract

 With regard to the seismic behavior of small scale earth dams, many studies focusing on the foundation ground have been conducted. However, there are few researches on the embankment itself, considering the influences of the water level, the degree of compaction, and countermeasure techniques. In this study, a series of centrifuge tests are carried out considering the seepage flow to clarify the effect of countermeasure techniques on the seepage-seismic coupled behavior of an earth embankment. Primary conclusions are summarized as follows. Under a higher water table elevation, a large settlement is induced due to the deformation in both the upstream and downstream directions. When the water level of reservoir is low, the settlement at the crest is less compared with the case explained above. A drainage method, which lowers phreatic line at the downstream side, is effective for reducing deformation. Counterweight fill installed at the upstream side may restrain the slide of the upstream side.