Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (2): 533-540.doi: 10.13278/j.cnki.jjuese.201502201

Previous Articles     Next Articles

Analysis on Slope Stability Based on Local Factor of Safety

Ma Jianquan1, Wang Nianqin1, Zhang Xinshe2   

  1. 1. College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China;
    2. Xi'an Center of Geological Survey, CGS, Xi'an 710054, China
  • Received:2014-07-02 Published:2015-03-26

PDF (PC)

428

Abstract:

The local factor of safety (LFS) formula was derived based on the Mohr-Coulomb strength theory and the concept of LFS was redefined. The stress distribution of the slope was calculated by using Geostudio software, combined with MATLAB for the calculation of LFS for each point in the slope model to outline the stable and unstable regions for analysis of the slope stability. Comparison of the results by the local factor of safety method(LFSM) and the limit equilibrium method (LEM) shows that for a vertical slope, both LFSM and LEM predict that it is unstable, whereas the LFS delineated a zone of potential failure behind the vertical face and near the toe. For a 60° slope, the LEM predicts that the factor of safety is greater than 1.00, whereas the LFSM delineates a zone of potential failure near the toe. For a 45° slope, both LFSM and LEM predict its stability. Further analysis shows that LFSM can analyze the slope stability without needing to identify or assume any potential failure surfaces, the stress concentration problem can be taken into consideration for slope stability analysis. The LFSM displays the results by unstable regions, while LEM shows the factor of safety. Sensitivity analysis of stress and geotechnical parameters in LFSM and LEM were conducted and the results revealed that in comparison to LEM, LFSM is more sensitive to the variation of geotechnical parameters. There exist boundary points of cohesion and internal friction angle that play important roles in determining the failure shape (partial deformation or damage, whole compression deformation or damage) of slope.

Key words: local factor of safety, limit equilibrium method, slope stability

CLC Number: 

  • P642

[1] Fredlund D G, Rahardjo H. Soil Mechanics for Un-saturated Soils[M]. New Jersey: John Wiley & Sons Press, 1993.

[2] 年廷凯, 张克利, 刘红帅, 等.基于强度折减法的三维边坡稳定性与破坏机制[J].吉林大学学报:地球科学版, 2013, 43(1): 178-185. Nian Tingkai, Zhang Keli, Liu Hongshuai, et al. Stability and Failure Mechanism of Three-Dimensional Slope Using Strength Reduction Method[J]. Journal of Jilin University: Earth Science Edition, 2013, 43(1): 178-185.

[3] 徐寅, 陈胜宏. 基于离散单元法的滑坡堆积及其涌浪计算[J]. 岩土力学, 2012, 33(9): 2850-2856. Xu Yin, Chen Shenghong. Calculation of Heap Shape of Landslide and Its Surge Based on Discrete Element Method[J]. Rock and Soil Mechanics, 2012, 33(9): 2850-2856.

[4] 张国新, 赵妍, 石根华, 等. 模拟岩石边坡倾倒破坏的数值流形法[J]. 岩土工程学报, 2007, 29(6):800-805. Zhang Guoxin, Zhao Yan, Shi Genhua, et al. Toppling Failure Simulation of Rock Slopes by Numerical Manifold Method[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(6): 800-805.

[5] 马建全, 李广杰, 张文, 等.基于可靠度的边坡稳定性影响因素[J]. 吉林大学学报:地球科学版, 2011, 41(增刊1): 187-194. Ma Jianquan, Li Guangjie, Zhang Wen, et al. Factors of Slope Stability Based on the Reliability Analysis[J]. Journal of Jilin University: Earth Science Edition, 2011, 41(Sup.1): 187-194.

[6] 张晨, 陈剑平, 肖云华.基于神经网络对有限元强度折减法分析[J].吉林大学学报:地球科学版, 2009, 39(1): 114-118. Zhang Chen, Chen Jianping, Xiao Yunhua. Analysis on Theory of Strength Reduction FEM Based on Artificial Neural Networks[J]. Journal of Jilin University: Earth Science Edition, 2009, 39(1): 114-118.

[7] Huang S, Yamasaki K. Slope Failure Analysis Using Local Minimum Factor-of-Safety Approach[J]. Journal of Geotechnical Engineering, 1993, 119(12), 1974-1989.

[8] 蒋青青. 基于Hoek-Brown准则点安全系数的边坡稳定性分析[J]. 中南大学学报:自然科学版, 2009, 40(3): 786-790. Jiang Qingqing. Stability of Point Safety Factor of Slope Based on Hoek-Brown Criterion[J]. Journal of Central South University: Science and Technology, 2009, 40(3): 786-790.

[9] 樊赟赟, 王思敬, 王恩志, 等. 岩土材料剪切破坏点安全系数的研究[J]. 岩土力学, 2009, 30(增刊2): 200-203. Fan Yunyun, Wang Sijing, Wang Enzhi, et al. Research on Point Safety Factor of Shear Failure Geomaterials[J]. Rock and Soil Mechanics, 2009, 30(Sup.2):200-203.

[10] 杨涛, 周德培, 马惠民, 等. 滑坡稳定性分析的点安全系数法[J]. 岩土力学, 2010, 31(3): 971-975. Yang Tao, Zhou Depei, Ma Huimin, et al. Point Safety Factor Method for Stability Analysis of Landslide[J]. Rock and Soil Mechanics, 2010, 31(3):971-975.

[11] 郑文棠. 基于FLAC3D的强度折减法和点安全系数法对比[J].水利与建筑工程学报, 2010, 8(4):54-57. Zheng Wentang. Contrast on Strength Reduction Method and Point Safety Factor Method with FLAC3D[J]. Journal of Water Resources and Architectural Engineering, 2010, 8(4): 54-57.

[12] Lu Ning, ?ener-Kaya B, Wayllace A, et al. Analysis of Rainfall-Induced Slope Instability Using a Field of Local Factor of Safety[J]. Water Resource Research, 2012, 48: W09524.
[1] Wang Ke, Wang Changming, Wang Bin, Yao Kang, Wang Tianzuo. Comparative Analysis on Slope Stability Based on Morgenstern-Price Method and Strength Reduction Method [J]. Journal of Jilin University(Earth Science Edition), 2013, 43(3): 902-907.
[2] HE Yu-qiong, XU Ze-min, WANG Zhi-qi, ZHANG Yong. Application of Landslide Rainfall Threshold Model [J]. J4, 2012, 42(4): 1112-1118.
[3] SHEN Shi-wei, NAI Lei, XU Yan. Two-Stage Fuzzy Comprehensive Evaluation for Rainfall Influence on Slope Stability Under Different Weight Value [J]. J4, 2012, 42(3): 777-784.
[4] AN Yu-ke, NAI Lei. Key-Block Systematic Method and Application in Reinforcement Unstable Rock on Slope [J]. J4, 2011, 41(3): 764-770.
[5] LIU Hong-shuai, NIAN Ting-kai, WAN Shao-shi. Effect of Boundary Constraint Condition on the Stability Analysis of 3D Slope [J]. J4, 2010, 40(3): 638-644.
[6] XU Pei-hua,CHEN Jian-ping,SHI Bing-fei,ZHONG Zhi-cheng. Study on Potential Failure Surface of Man-Made Slope-the Example of A Man-Made High Slope in Guangzhou Science City [J]. J4, 2008, 38(5): 825-0830.
[7] YANG Jing，CHEN Jian-ping，WANG Ji-liang. Application of Uniform Design and Grey Theory in Analysis of Slope Stability [J]. J4, 2008, 38(4): 654-0658.
[8] ZHANG Hao, WANG Chang-ming，MA Wen-dong. Simulated Annealing Algorithm of Global Search for Critical Sliding Surface of Slope and Improvements [J]. J4, 2007, 37(1): 129-0133.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright © Journal of Jilin University(Earth Science Edition), All Rights Reserved.
Tel: +86-431-88502374；13756165364　E-mail: xuebao1956@jlu.edu.cn
Powered by Beijing Magtech Co. Ltd