Numerical Analysis on Stability of Slope Considering Rainfall Infiltration

doi:10.12068/j.issn.1005-3026.2018.08.026

Abstract

Abstract: Finite element software ABAQUS was utilized to simulate the coupling effect of seepage field and stress field in slope under rainfall conditions. Regarding the saltation of the displacement at a characteristic nodal and the formation of continuously plastic deformation as instability criterion， The safety factor of slope was numerically computed by strength reduction method to assess the slope stability. By analyzing safety factor and the evolution of pore pressure， how the rainfall infiltration affects slope stability can be explained. And the result was verified by actual slope case including the layer of clay. It was found that the higher the rainfall intensity is， the faster transient saturated zone will form， and the layer of clay can accelerate this process， threatening the stability of slope. Therefore， the shallow landslides may occur. The maximum decline of the safety factor occurs during 24h rainfall. This research provides good reference to slope monitoring and slope anti-slide measures.

Key words: rainfall infiltration, slope stability, FEM, fluid-structure interaction, strength reduction method

CLC Number:

TU442

WANG Shu-hong， HE Jian， YANG Tian-jiao. Numerical Analysis on Stability of Slope Considering Rainfall Infiltration[J]. Journal of Northeastern University Natural Science, 2018, 39(8): 1196-1200.

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