粘土边坡的可靠性分析

Analysis on Reliability of Clay Slopes

Ｔａｙｌｏｒ稳定图表是分析边坡稳定常用的手段，为将Ｔａｙｌｏｒ稳定图表应用于边坡的可靠性分析，对Ｔａｙｌｏｒ稳定图表进行了重新整理，然后以新的稳定图表求得边坡的稳定系数和安全系数；再应用可靠性理论按一次二阶矩的概念计算相应的可靠指标，给安全系数以可靠性的内容。计算时以给定的安全系数或可靠指标算得相应的破坏概率后，采用以费用表示的损失函数求出相应的投资总费用，并以此来选择经济合理的设计方案。

Taylor’s stability chart is rearranged in order to be applied to analysis on reliability of clay slopes. From the new chart both of the stability and safety factors are obtained,and the corresponding reliability index is calculated according to reliability theory with second moment first order approach to enable the safety factor to be more reliable. In practical design,a damage index described with cost of failure is employed to calculate the total cost following the calculation of failure probability according to the given safety or reliability factor, so that an economically optimized scheme can be determined.