有限元和条分结合法计算边坡静力稳定性探讨

Slope Stability Analysis by Finite Element Method Combined with Slices Method

对于边坡稳定性计算通常采用不平衡推力法(如瑞典圆弧法和Bisho法等)和有限元计算方法,两者在计算本质上没有区别,但在计算过程中都存在不足。不平衡推力法在稳定性计算时要对潜在的滑面进行假设搜索,相对计算工作量较大,然而采用有限元分析的方法,在计算过程中往往由于判断收敛标准的不同,会出现不同的稳定性计算结果。文章利用两者的优点进行结合,分析计算得到边坡在静力条件下的稳定性。

In slope stability analysis, disproportion thrust method （such as the Swedish circle method and the Bisho method） and finite element method are usually adopted, which have no essential difference but both have shortcomings in calculation. When using disproportion thrust method, the latent sliding surface must be supposed and many triable calculation must be carried out; whereas for finite element method, different convergent norms often lead to different results. This paper presents a method which combines the advantages of the two methods, for analyzing the static slope stability.