Slope Stability Analysis by SSR Based on Connectivity of Plastic Zone Failure Criterion

Abstract:

While the elasto-plastic finite element method based on the shear strength reduction(SSR) technique is employed to analyze slope stability, the overall factor of safety computed numerically is，in a certain degree，dependent on the failure criteria used for evaluating critical instability condition of slope. In the present paper, the connectivity of plastic zone criterion is chosen with its close physical meaning to the LEM , and the farther 3D critical slip surface searching procedure is presented. The results of stability analysis of a certain initial quarry slope show that the chosen failure criterion and the 3D critical slip surface searching procedure is reasonable and can be widely applied to slope engineering practice．

• Periodical: Applied Mechanics and Materials (Volumes 170-173)
• Pages: 700-705
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.170-173.700
• Online since: May 2012
• Authors: Guo Zhang Xu, Jin Qiu Liang, Yi Pei Zeng
• Keywords: Critical Slip Surface, Failure Criterion, Slope Stability, SSR

References

[1] Zienkiewicz, O. C. Humpheson C. Lewis. R W. ,in:Associated and non-associated visco-plasticityand plasticity in soil mechanics [J]. (Geotechnique 1975, 25 ( 4 );p.671~ 689

DOI: 10.1680/geot.1975.25.4.671

[2] Matsui T and San K C. ,in: Finite element slope stability analysis by shear strength reduction technique [J] . (Soil and Foundation, 1992, 32(1);p.59~70

DOI: 10.3208/sandf1972.32.59

[3] Giffiths. D. V and Lane P A.,in:Slope stability analysis by finite elements[J]. (Geotechnique ,1999, 49(3);p.387~403

[4] Ugai. K and Leshchinsky. D. ,in: Three-dimensional limit equilibrium and finite element analysis [J]. (Soils and Foundations, 1995, 35(4);p.1~7

DOI: 10.3208/sandf.35.4_1

[5] ZHENG Ying-ren and ZHAO Shang-yi,in:Application of strength reduction FEM in soil and rock slope. (Chinese Journal of Rock Mechanics and Engineering,2004,23(19);pp.3381-3388

[6] ZHAO Shang-yi,ZHENG Ying-ren,SHI Wei-min and WANG Jing-lin,in:Analysis on safety factor of slope by strength reduction FEM. (Chinese Journal of Rock Mechanics and Engineering,2002,24(3);pp.343-346

[7] LIAN Zhen-ying,HAN Guo-cheng and SUN Xian-jing,in:Stability analysis of excavation by strength reduction FEM. (Chinese Journal of Geotechnical Engineering,2001,23(4);pp.407-411

[8] LIU Zuo-qiu,ZHOU Cui-ying,DONG Li-guo,TAN Xiang-shao,DENG Yi-mei.Slope stability and strengthening analysis by strength reduction FEM. Rock and Soil Mechanics,2005,26(4):558-561

[9] SUN Guan-hua,ZHENG Hong,LI Chun-guang.Searching critical slip surface of three—dimensional slopes based on equivalent plastic strain. Rock and Soil Mechanics,2010,31(2):627-632

[10] LIU Jin-long,LUAN Mao-tian,ZHAO Shao-fei,YUAN Fan-fan,WANG Ji-li.Discussion on criteria for evaluating stability of slope in elastoplastic FEM based on shear strength reduction technique. Rock and Soil Mechanics,2005,26(8):1345-1348

[11] ZHENG Hong,LIU De-fu.Properties of elasto-plastic matrix Dep and a criterion on limiting state of slope stability by FEM. Chinese Journal of Rock Mechanics and Engineering,2005,24(7):1099-1105

[12] TONG Guo,ZHONG Ming-he.Comparison of factor of safety of a roadway slope based on the limit equilibrium method and shear strength reduction method. Geotechnical Special Publication,2011:34-40

DOI: 10.1061/47627(406)5

[13] ZHENG Hong, L.G. Tham,LIU De-fu.On two definitions of the factor of safety commonly used in the finite element slope stability analysis. Computers and Geotechnics,2006,33:188-195

DOI: 10.1016/j.compgeo.2006.03.007