考虑条间推力倾角变化对不平衡推力法的修正

Amendment on Unbalanced Thrust Force Method when Considering Change of Inter-slice Thrust Force Inclination

不平衡推力法是工程上常用的一种边坡稳定性分析方法。为研究不平衡推力法中条间推力倾角变化对边坡稳定性的影响,假定了条间推力倾角角度系数μ,并令其在0到1之间取值,然后推导出修正后的不平衡推力法安全系数计算公式。通过两个边坡算例的分析,探讨了条间推力倾角角度系数μ的变化影响规律,并指出在实际工程中,通过改变μ的取值可在不平衡推力法中获得与实际情况比较相符的条间力方向。

Unbalanced thrust force method is a method commonly used to analyze slope stability. In order to study how change of inter-slice thrust force inclination affects slope stability, it is assumed that the angle coefficient/z of the inclination is instructed to be 0 - 1, and then the formula calculating safety factor for amended unbalanced thrust force method is deduced. Through analysis of two eases, the laws of angle coefficient/x change is discussed and, in practical engineering, it is pointed out that with change of/.t value, the direction of inter-slice force relatively consistent with actual situation may be obtained when unbalanced thrust force method is used.