边坡稳定分析中不平衡推力法的两种解法

Slope Stability Analysis by Imbalance Thrust Force Method

不平衡推力法是我国独创的边坡稳定分析方法,在滑坡稳定分析和治理中得到广泛地应用。然而当边坡滑面为圆弧形时,不平衡推力法的精度与Bishop法相当,但是当滑面为不规则折线时安全系数与Bishop法可能相差很大,这会对工程的安全带来隐患。由于上述原因,对非圆弧形滑面最好不要单独使用不平衡推力法,而应采取多种方法进行综合分析。

Imbalance .thrust force method （ITFM） is originally developed approach for slope stability analysis in China, which has been widely used in the field of landslide stability analysis. When the slip face is circle, the precision of ITFM is equivalent to that of Bishop, but when slid face is irregularity polygonal line, the safety factor obtained from ITFM may be far away from Bishop, which leads to hidden trouble inevitably. So the paper suggestes that for non-circle slips, it is better not used alone, but adopted by two or more methods instead.