黏性土坡稳定的安全系数和可靠度

将边坡定值分析方法同可靠性分析方法相结合 ,利用定值分析方法的简便 ,也能考虑土性参数的变异性和不确定性 .利用此法在可资利用的土性参数数据有限的条件下 ,借助于概率统计理论 ,并利用土性参数分布的 3σ法则原理以及土性参数变异系数的公开报道值 ,取得可靠性分析的数据 ,同样能对土坡稳定性和安全可靠性进行有价值的多侧面评价 .基于简单黏性土坡模型 ,应用该算法的计算分析结果证明 :在定值分析基础上进行可靠性分析 ,理论上正确 ,实践上简便易用 .同时 ,着重对黏性土坡稳定敏感性因素及其可靠度的一些规律作了较为深入的研究 .图 4,参 8.

Safety coefficient and reliability in clayey soil slope

In this paper a new method is presented, which combines the deterministic method with the probabilistic method, not only the method has the simplicity of deterministic method, but also it allows for the degree of uncertainty and variability of soil parameters involved in reliability index's calculation. Specially, under the condition of limited soil parameter data available, using the probabilistic theory and "Three-Sigma Rule" of soil parameter distribution, the data required in reliability analysis can be gained from the values of coefficients of variation from published sources, so the slope stability and its safety degree can also be estimated significantly from more sides. Based upon the simple model of clayey soil slope, the calculation results applying the method presented in this paper testified that proceeding the probabilistic analysis based upon the deterministic analysis is proved correct in theory and easy to use in practice. At the same time, the sensibility factors affecting the clayey soil slope stability are analyzed, and also the rules of reliability of soil slope stability are researched a little more deeply. 4figs.,8refs.