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A Study on Shear Resistance Effect along Marginal Region of Sliding Mass using 3D Slope Stability Analysis  

Seo Yong-Seok (Dept. of Earth & Environmental Sci. & Institute for Basic Science Research, Chungbuk National University)
Ohta Hidemasa (Ohta Geo-Research Co., Ltd. Japan)
Chae Byung-Gon (Geological & Environ. Hazards Div., Korea Inst. Geoscience and Mineral Res.)
Yoon Woon-Sang (NEXGEO Inc.)
Publication Information
The Journal of Engineering Geology / v.14, no.4, 2004 , pp. 451-460 More about this Journal
Abstract
The strength of sliding plane is usually assigned on the whole sliding plane with same value in 2D limit equilibrium slope stability method. However, the potential sliding plane is divided into two or three parts which have different sliding resistances. According to the calculation results of 3D slope stability analyses using 4 types of slope cutting models, marginal sliding resistance could affect the safety of slope significantly. In this calculation two kinds of the sliding plane strengths were applied differently to the parts of bottom and margin of the model slope. The effect of marginal resistance was calculated quantitatively. In case of lower sliding resistance of the bottom, the safety factor becomes low in a margin cutting model. However, in case of higher sliding resistance of the bottom, the safety factor decreased slightly in a lower part cutting model and increased in a upper margin cutting model.
Keywords
3D slope analysis; Marginal sliding plane strength; Safety factor; Slope cutting;
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