饱和开挖土坡稳定性状的流固耦合有限元分析

A Coupled Flow-Deformation Finite Element Analysis of the Stabili ty Behavior of Excavated Saturated Soil Slopes

以Biot固结理论为基础对饱和开挖土坡的稳定性进行非线性有限元数值分析.通过有限元分析可以较准确地求解土坡内部的有效应力场、位移场和孔隙水压力场;可以确定土坡的安全系数及相应的临界滑动面随时间的变化;能够对开挖土坡变形和稳定性的长期性状进行预测.

The stability behavior of excavated sa tu rated soil slopes is studied by means of a nonlinear finite element method based on Biot's consolidation theory. Through numerical analyses, the effective stre ss fields, deformation fields as well as pore water pressure fields in the slope s can be determined with good accuracy, and the variation in factor of safety ag ainst slip failure, and the corresponding critical slip surface can also be dete rmined in association with the stress fields, which enables the prediction of th e long term deformation and stability behavior of excavated slopes.