Shear deformation of unsaturated sandy slope according to absorbing due to rainfall infiltration

Abstract

In order to examine the mechanism of shear deformation by absorbing due to rainfall infiltration, behavior of seepage water and deformation in the model slope were measured under artificial rainfall. As results, deformation of slope increases remarkably after rainfall under unsaturated condition of slope. And a dependency of shear strain increment during absorbing process on volumetric water content increase (hereafter VWCI)or suction decrease is greater at deeper soil layer. This seems to be due to smaller VWCI rate or suction decrease rate at deeper soil layer.