黄土土性参数的统计分析

摘要

讨论了土性参数不确定性的主要来源，并对黄土高原典型地段黄土土性参数进行了详细地统计分析，结果表明黄土土性参数的均值、标准差和变异系数 具有明显的区域性特点，土性参数的统计必须针对具体的工程进行。黄土的物理力学指标的 分布多服从正态分布，在边坡可靠度计算中各指标均可用正态分布近似。%The major sources for uncertaing of physical and mech anical indexes of loess are discussed in the paper. The main indexes of the typical loess are statistically analysed. The result shows that there is regional distinction in average value standard deviation, and variation coefficient of the characteristic indexes, and therefore, statistics of the indexes should be aimed at specific project. The distribution of the main indexes of loess is almost normal distribution. When the loess slope stability is calculated, the d istribution of loess indexes can be approximate from by the normal distribution.