| loess has a wide distributed area and is of great thickness in china. Concomitantly,loess landslides become a widespread destructive disaster,which thread people’s life and property. therefore,the research on land slope means a lot to prevent and reduce landslides. Numerical simulation method is one of the most effective method for the research of landslides. This paper studies the change of slope ‘stability under earthquake and water percolation based on summarizing and analyzing the type, genesis, destruction mode of loess slope.and a series of analysis on loess slope is accomplished.following is the main cognitions.This article used the method and get to know the following:(1)summarize the genesis,type destruction mode of loess slope and expatiate its exceptionality in different respects.(2)genelize the basic models of land slope calculation such as limit equilibrium method,simplified Bishop method string the reduction method and the physical model of unsaturated seepage.(3)with ABQUS software,analyze the acceleration, deformation, stress of different structured loess slope under earthquake. summarize the respective response of loess slope with different weak intercalary angle to earthquake.the disciplinarian conclusion indicates the response of loess slope to earthquake increases while the weak intercalary angle changes from negative to positive.(4) with the geo-studio software analyze the change of loess slope’s stability in different conditions including centralized infiltration raindrop infiltration and sudden drop of reservoir water level. the conclusion indicates that infiltration point has huge influence on slope stability provided that the rainfall is of no difference, when the rain lasts, the stability of slope weakens. And when the reservoir water level suddenly drops, the stability also weakens because the external water pressure disappears while the internal pressure remains.Keywordloess slope,numerical simulation, earthquake load,weak interlayer,infiltration. |
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