运用一次二阶矩法分析滑坡稳定可靠度

基于对滑坡稳定性影响强烈的岩土性质、计算模式、地下水及荷载等因素的分析,建立滑坡稳定性评价的极限状态方程,通过对岩土参数、地下水及有效重力等敏感因子的求解及分布特征分析;在用泰勒级数对非线性极限状态方程线性化后,结合结构可靠度的理论,运用一次二阶矩的方法,求解了滑坡稳定性可靠度指标β,最后通过开县康家咀滑坡稳定性对比分析,证明了该方法的正确性,提高了滑坡稳定性评价精度。

FIRST-ORDER SECOND-MOMEN RELIABILITY ANALYSIS APPLICATION TO LANDSLIDES STABILIZATION

Based on the analysis of geotechnical quality, calcutive mode, underwater, load and some other factors which can strongly influence the stabilization of landslides, this article sets utmost equations on assessing through the analysis of geotechnical parameter, underwater, effective gravity and other sensitive factors, and their distribution. By combining with the theory of reliability and the approach of First-order Second-moment, after the nonlinear utmost equation being linearized by using Thaler series,and combining with reliability method, this article works out a reliable index of the stabilization of landslides, that is β. At last, this theory is proved accurate by contrastive analysis on the stabilization of the landslide of Kangjiazui in Kaixian. Meanwhile, the accuracy to evaluating the stabilization of landslides is improved.