渗流作用下水库土坝稳定性的有限元分析

本文运用有限元法原理，采用弃单元法，利用ANSYS软件中热分析模块模拟水库土坝的渗流场。结合实际工程算例，分析了稳定渗流条件下土坝的浸润面和渗透水压力，并运用强度折减理论，分析了土坝的位移场和稳定系数。分析计算表明：当出现渗流时，土坝边坡的稳定系数降低，同时也为坝底管涌提供了可能的条件，故工程中应做好土坝边坡坡面的防护和防渗措施。

FEM Analysis on Stability of Reservoir Earth Dam with Seepage

Based on the finite element method(FEM) and the abandoning element method,the seepage field of reservoir earth dam was simulated with thermal analysis module in ANSYS software.Taking a practical reservoir dam engineering as an example,the saturation surface and the seepage pressure of the earth dam under steady seepage was analyzed,and the displacement field and stability factors of the reservoir earth dam under seepage were analyzed by using strength reduction theory.Analysis and calculation show that the stability coefficient of the dam slope would reduce and piping would appear at the bottom when seepage occurs in the earth dam.Then,the protective and impervious measures of the dam slope should be strengthened.