›› 2008, Vol. 29 ›› Issue (4): 1133-1137.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

FEM strength reduction method based on consolidation theories of unsaturated soils

ZHOU Gui-yun1,2, LI Tong-chun1,2   

  1. 1.State Key Laboratory of Hydrology, Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China; 2. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
  • Received:2007-05-30 Online:2008-04-10 Published:2013-07-10

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Abstract: The water level falling of the reservoir produces saturated-unsaturated unsteady seepage in the slope. The unsteady seepage is one of the important reasons of slope instability. To know the influences of unsteady seepage on the slope stability, consolidation equation of solid and liquid phase porous media is derived, which takes the coupling role of seepage and deformation into consideration. On this basis, slope stability factor is calculated by finite element shear strength reduction method; and a set of unified finite element method is adopted for seepage, deformation and stability analysis. The influences of permeability of soil and falling of water level of the slope on stability factor of landslide in case of sharp falling of reservoir level are analyzed through case dies. The calculation results indicate that the theory and method proposed are feasible and effective. An efficient tool to analyze the slope stability problem under saturated-unsaturated unsteady seepage is given.

Key words: saturated-unsaturated, unsteady seepage, unsaturated soils, consolidation theory, slope stability, FEM strength reduction

CLC Number: 

  • TU 443
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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