강우에 따른 화강암질 풍화토 사면의 전단강도 특성에 관한 연구 = Study on the characteristics of shear strength on the weathered granite soil slope in accordance with the rainfall

다국어 초록 (Multilingual Abstract)

This study calculated the pore water pressure, the depth of seepage, the constant of the strength in accordance with the slope inclination and the rainfall intensity over the slope built by the weathered granite soil (SP, SM). And, the change of the shear strength in accordance with the rainfall has been compared and analyzed by applying the shear strength formula of the unsaturated soil. As a result, the rainfall intensity is stronger and the slope inclination is gentler the seepage speed in accordance with the rainfall became faster proportionally. As a result of comparing and analyzing both the theoretical value of Lumb and the actual value of the model, it can be said that the actual value is faster. Since SM shows the bigger shear strength than SP, it can also be said that as the granules increase, the coefficient of permeability becomes smaller; and as the seepage rate became smaller, it affects the seepage speed. Likewise, the shear strength within the slope displays the smallest shear strength at the inclination of 1:1.5 the reason of its decrease turned out that it was due to the increase of the pore water pressure.

참고문헌 (Reference)

1 "풍화토 사면에서 강우로 인한 간극수압 변화에 대한 실험연구" 19 (19): 41-49, 2003

2 "강우시 사면의 침투거동에 관한 연구" 2001

3 "강우시 무한사면의 침투거동" 1989

4 "Stress State Variables for Unsaturated Soils" 447-464, 1977

5 Lumb, "Slope Failures in Hong Kong Quarterly Journal of Engineering Geology" 1975

6 "Shear Strength of Unsaturated Soils" 1978

7 Fredlund, "Predicting of Permeability function for Unsaturated Soils using the Soil-water Characteristic curve" 1994

8 Tsaparas, I.,, "Controlling Parameters for Rainfall-induced Landslides" 29 : 1-27, 2002