考虑渗流作用时边坡稳定性分析方法比较与改进

Comparison and Improvement of the New Method of Slope Stability Analysis Considering Seepage

考虑到地下水对边坡稳定的作用具有很强的工程意义,文中总结了目前工程中分析边坡稳定性常用的几种考虑渗流力方法,并对其假定条件做了归纳。在深入探讨地下水渗流对边坡稳定作用机理的基础上,提出渗流场-应力场耦合作用下基于场变量的有限元新方法。该方法可以进行渗流场-应力场的耦合分析,并利用场变量控制土体强度参数变化来实现参数的连续折减,整个分析过程一次完成,大大简化了计算工作量,其结果也比较合理。最后结合简单算例对以上几种计算方法作了对比分析,阐明了各方法的适用条件,供工程实践参考。

This paper provides some references on the method of slope stability analysis. In the paper, a new method considering the seepage forces for the slope stability analysis is proposed and it can well consider the coupling effect of seepage field-stress field and based on the field variable, it can combine all the analysis steps into one step, which improve calculation efficiency greatly. There are still several approaches which are discussed in detail. With a simple example, some beneficial results are obtained from comparing the new method with the current methods.