Abstract
In this study, we discussed a seismic behavior of caisson type seawalls for controlled waste disposal using water proof sheets as seepage. Underwater shaking table tests with a scale of 1 to 12 model seawall were performed to examine the displacement of the caisson, the soils behind the caisson, and the water proof sheet during earthquake. The results show that the behavior of the water proof sheet during shaking was closely related with the behavior of the horizontal displacement of the caisson, and the residual strain in the sheet was the largest at the top of slope, in which the soil displacement was significant.
