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Volume 36 Issue 12
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ZHOU Jian-feng, WANG Jun-xing, CHEN Wei. Lower bound analysis of slope stability subjected to transient unsaturated seepage[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(12): 2300-2305. DOI: 10.11779/CJGE201412019
Citation: ZHOU Jian-feng, WANG Jun-xing, CHEN Wei. Lower bound analysis of slope stability subjected to transient unsaturated seepage[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(12): 2300-2305. DOI: 10.11779/CJGE201412019
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Lower bound analysis of slope stability subjected to transient unsaturated seepage

  • 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 2. Fujian Provincial Planning Institute of Water Resources, Fuzhou 350001, China

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  • Received Date: September 02, 2013
  • Published Date: December 25, 2014
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    • Abstract
  • The conventional methods for slope stability analysis are mainly based on the theory of saturated soils and the stable seepage situation and difficult to reflect the influence of rainfall and water level drawdown on slope stability. Actually quite a number of slope instabilities are caused by transient unsaturated seepage. Based on the effective principle of unsaturated soils by Bishop and the theory of two-stress-state-variable mechanism of the shear strength by Fredlund, the water pressure at any time is introduced into the balance equation as the volume force and the effective stress fields satisfying the conditions of equilibrium, stress boundary, yielding and stress discontinuity are constructed. By using the idea of nonlinear programming, a lower bound analysis model for the slope stability subjected to transient unsaturated seepage is established, and the corresponding program is compiled. Through numerical examples of impoundment drawdown and rainfall infiltration analysis, the correctness of the proposed method is verified, and a further understanding about the law of slope instability subjected to transient unsaturated seepage is obtained.
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    • References (14)
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