承压水对平推式滑坡的作用分析

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Abstract Based on geological survey，influence of confined water on stability of translational landslide is discussed. Combining with geological environmental condition of Xiashan landslide，the typical groundwater seepage model of translational landslide is established；and the result of slope stability calculation becomes more reasonable considering action range of confined water. Based on one-dimensional steady seepage theory，calculation formula of action range caused by confined water is deduced；and then parameter sensitivity of this formula is analyzed. The calculation results show that action range of confined water follows established law within a certain range of each parameter：(1) Action range of confined water decreases linearly with the increase of permeability coefficient. (2) Action range of confined water increases linearly with seepage discharge. (3) Action range of confined water takes on parabola shape with thickness of permeable layer，and it is accelerated decreasing trend with the increase of permeable layer thickness. Calculation results also show that the stability coefficients of landslide decreases linearly with the increase of action range of confined water.

Key words： slope engineering translational landslide confined water seepage sensitivity analysis slope stability

Received: 31 October 2011

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http://www.rockmech.org/EN/Y2012/V31/I4/762

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