| Title |
Stability Analysis on Unsaturated Gneiss Weathered Soil Slopes Considering Wetting Path Soil-Water Characteristic Curve |
| Keywords |
SWCC;wetting path;hysteresis;gneiss weathered soils;unsaturated slopes;함수특성곡선;습윤 경로;이력;편마풍화토;불포화 사면 |
| Abstract |
It has been reported in Korea that surface slope failures in weathered soil are mainly caused by downward infiltration due to rainfall. These failures are triggered by the deepening of the wetting band in soils accompanied by a decrease in matric suction induced by the water infiltration. So, a need exists that these trends of wetting path in gneiss weathered soils, which is commonly found in Korea, are assessed by phenomenological approach. In this paper, numerical analyses of unsaturated soil slope under rainfall conditions are presented based on the wetting path soil-water characteristic curve in the laboratory. As the field SWCC matches well with the wetting path of the laboratory SWCC from the Literatures, it seems reasonable to adopt the laboratory wetting SWCC as an upper boundary condition in the assessment of unsaturated slope instability. |