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当依据安全系数法进行验算时,需要输入安全系数SF的值。验算公式为:
其中:
Tact
-
沿滑面方向的下滑力
Tres
沿滑面方向的抗滑力
SF
计算安全系数
SFs
设计安全系数(在“稳定性分析”选项卡中输入)
在绝大多数情况下,当评价岩质边坡的稳定性时,安全系数的推荐值为:对于基坑开挖,SFs = 1.1 到1.25,对于高速公路路堑岩质边坡,SFs =1.2到1.5。