Changes of soil properties parameter have great influence on probabilistic slope stability analysis while soil properties exhibit an inherent spatial variability.Variance reduction method,midpoint method and local aver-age subdivision method are usually used in soil random field.In this paper three methods are used to make out the probabilistic slope stability analysis for a simple slope.They are different random field modeling methods.In the same time,the results are compared with each other.From a practical point of view,three random modeling meth-ods are used for the reliability analysis results and are comparable with each other.The stability of slope is influ-enced by the spatial variability of soil properties,and the influence depends on the relative dimension of the scale of fluctuation and the length of critical slip surface from the results.%土体性质表现出其具有固有的应变特性，土体每一点的参数都会发生变化，故在边坡稳定的可靠度分析中不能被忽略。在边坡稳定分析中，常用的模拟土体随机场的模型有折减法、中点法和局部平均离散法。针对一个典型边坡，应用了三个随机场模型导出该边坡的稳定分析结果，对不同随机场模型方法得到的可靠度分析结果进行了互相对比。结果表明边坡的可靠度结果受到土体特性空间变异性的影响，并且这个影响取决于相关距离的相对尺寸和临界滑裂面长度的影响。
展开▼
