Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2009.03a
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- Pages.434-443
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- 2009
A Comarative study on slope stability modeling of highly fractured rock slopes
절리암반사면의 안정해석 방법에 관한 비교연구
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Yoo, Chung-Sik
(Dept. of Civil & Envir. Engrg, Sungkyunkwan Univ) ;
- Kim, Sun-Bin (Dept. of Civil & Envir. Engrg, Sungkyunkwan Univ.) ;
- Yang, Ki-Ho (Dept. of Civil & Envir. Engrg, Sungkyunkwan Univ.) ;
- Jung, Ha-Seung (Dept. of Civil & Envir. Engrg, Sungkyunkwan Univ.)
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유충식
(성균관대학교 건설환경시스템공학과) ;
- 김선빈 (성균관대학교 건설환경시스템공학과) ;
- 양기호 (성균관대학교 건설환경시스템공학과) ;
- 정하승 (성균관대학교 건설환경시스템공학과)
- Published : 2009.03.27
Abstract
Slope stability analysis is an essential part of rock slope design. For highly fractured rock, the limit equilibrium method (LEM) based slope stability analysis with a circular failure surface is often carried out assuming the rock mass behaves more or less as a continuum. This paper examines first, the applicability of the finite-element method (FEM) based shear strength reduction (SSR) technique for highly fractured rock slope, and second the use of Mohr-Coulomb (MC) failure criterion in conjunction with generalized Hoek-Brown (HB) failure criterion. The numerical results on a number of cases are compared in terms of the factor of safety (FS). The results indicated that the FEM-based SSR technique yields almost the same FSs from LEM, and that the MC and HB failure criteria yield almost identical FSs when the strength parameters for MC failure criterion are obtained based on the modified HB failure criterion if and only if value of the Hoek-Brown constant
Keywords
- limit equilibrium method;
- shear strength reduction method;
- finite difference method;
- Hoek-Brown failure criterion;
- Mohr-Coulomb failure criterion