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http://dx.doi.org/10.12814/jkgss.2018.17.1.139

Estimation of Shear Strength of Discontinuous (bedding) Cut Sedimentary Rock Slope by Using Back Analysis  

Kim, Chang-Ho (Korea Expressway Corp.)
Kim, Bong-Yong (DongIl Engrg. Consul. Co., Ltd.)
Park, Tae-Wan (Korea Expressway Corp.)
Kim, Tae-Hyung (Dept. of Civil Engre., Korea Maritime and Ocean Univ.)
Publication Information
Journal of the Korean Geosynthetics Society / v.17, no.1, 2018 , pp. 139-152 More about this Journal
Abstract
This study is an analysis of slope failure examples of cut sedimentary hills during construction road in Kyoungsang Basin, especially Yangsan Fault system (Ilkwang-Dongrae fault). This area involved a lot of hillslope failures compared to other areas during road construction. The exposed failure slopes were first face-mapped, and then back analyzed based on the limit equilibrium method to assess the shear strength parameters of discontinuity (bedding). The results of this analysis indicate that the shear strength parameters of discontinuity (bedding) are significantly smaller than those used in the design stage and presented in the existing works. The filling in the bedding and emerging groundwater may be decreasing strength parameters. Especially, the clay in the bedding plays a key role in the effect of the shear strength. The study also suggests that the bedding angle and the internal friction angle are proportional to each other. Using this relationship and knowing the bedding angle, the friction can easily be estimated.
Keywords
Discontinuous (bedding); Back analysis; Yangsan fault system; Shear strength; Filling (clay); Bedding angle;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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