考虑渗流场与应力场耦合的边坡稳定性分析

文章在介绍渗流问题有限元公式的基础上,运用变单元渗透系数法的原理,利用ANSYS软件的APDL语言开发了二维稳定和非稳定渗流的程序,通过迭代即可较准确地求出自由面的位置;同时,针对某一具体算例,分别对不考虑应力影响下的渗流场和不考虑渗流影响下的应力场以及两场相互耦合时的稳定性进行了研究,为非稳定渗流下边坡稳定分析和滑坡灾害预报等方面提供有用的参考。

Stability Analysis on the Slope that Considers the Coupling of Seepage Field and Stress Field

Based on the finite element formula for seepage problems,the Paper has developed a two-dimensional steady and unsteady seepage program by using the principle of variable seepage coefficient method and APDL language of ANSYS.With this program,the position of free surface can be determined precisely through reiterative calculation.Furthermore,aiming at a material example,studies have been conducted on the stability of slope respectively under the following conditions:with the seepage field taking no account of stress influence;with the stress field taking no account of seepage influence and with two fields being coupled with each other.All these provide useful reference for the stability analysis on the slope with unsteady seepage and slope disaster prediction etc.