基于Spencer法的边坡稳定性可靠度指标分析

Reliability index analysis of slope stability based on Spencer's method

在边坡可靠度分析中,考虑Spencer方法计算模型的不确定性,推导出Spencer方法安全系数模型修正系数的概率密度函数,引入了随机场局部平均理论用于分析边坡中土性参数的空间相关性,并在此基础上提出了一种改进的边坡可靠性指标计算方法。

In probabilistic slope stability analysis, the correction factor for the safety factor from Spencer＇s procedure and the theory of the soil properties random field have not been investigated fully. First, since the value of the correction factor is uncertain; it was modeled by the probability distribution shown in this paper. On the other hand, the theory of local average random field is applied to calculate the reliability index. Based on the above, an improved method is proposed to search for the reliability index of slope stability.