Seismic stability analysis of a layered rock slope |
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| Affiliation: | 1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;2. School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 44919, Republic of Korea;3. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;1. Geological Engineering, Department of Earth, Ocean, & Atmospheric Sciences, University of British Columbia, Vancouver, Canada;2. Geology & Geophysics, University of Utah, Salt Lake City, USA;3. Swiss Competence Center for Energy Research – Supply of Energy (SCCER-SoE), Department of Earth Sciences, ETH Zürich, Switzerland |
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| Abstract: | In general, the determination of the factor of safety and the location of the critical slip surface are two major challenges in seismic slope stability analysis. In this paper, a new approach for determining the factor of safety and the corresponding critical slip surface of a layered rock slope subjected to seismic excitations is presented, through a case study based on the combination of the shear strength reduction technique and distinct element method. According to this proposed method, the seismic factor of safety and the critical slip surface of the slope are estimated and compared with those obtained by the pseudo-static approach, combined with the limit equilibrium method. It is found that the factor of safety obtained from the proposed method is slightly greater than that computed by the pseudo-static analysis, with a difference of 4.2%, and that the critical slip surface obtained from the two methods is identical, which confirms the reasonability and feasibility of the proposed method. |
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| Keywords: | Seismic slope stability Pseudo-static method Shear strength reduction Factor of safety Critical slip surface Layered rock slopes |
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