wenchuan earthquake triggered a large number of geological disasters,the judgement of the slope table for boulder and governance has become a disaster reconstruction problem.Stability limit characteristics of the boulder slip for eccentric type,with the theory of reliability,determine its reliability limit state equation,and based on field measurement and probability statistics method,the function of boulder in the slope toe of alpha,Angle of internal friction of boulder phi,unit length dangerous rock mass gravity,G,c boulder cohesive force,boulder height h of the basic variables such as the mean,coefficient of variation and distribution characteristics were determined.Based on the above research results,the eccentric slippage boulder stability reliability index calculation method,the reliability sensitivity of the basic variables were studied,the results show that the boulder inclination of the reliability sensitivity is highest,the second is the weight per unit length of boulder,internal friction Angle and cohesive force index,and the height of the boulder has no effect on it.%汶川地震引发了大量的地质灾害,其中坡表停留孤石的判定及治理成为了灾害重建的难题.针对偏心滑落式孤石的稳定性极限特征,用可靠度理论,建立其可靠度判定极限状态方程;并根据现场量测及概率统计方法,对函数中孤石处的坡脚α、孤石的内摩擦角(ψ)、单位长度危岩体重力G、孤石黏聚力c、孤石高度h等基本变量的均值、变异性系数及分布特征进行确定.基于以上研究成果,建立了偏心滑移式孤石稳定性可靠度指标计算方法;同时对各基本变量的可靠度敏感性进行研究.研究结果表明:孤石的倾角的可靠度敏感性最高,其次是孤石的单位长度重量、内摩擦角和黏聚力指标;而孤石的高度对其没有影响.
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