新黄土物理力学性质指标统计特征

Statistical Characteristics of Physico-Mechanical Indices of the New Loess

新黄土形成时间短,物理力学性质不稳定,往往是构成建筑地基及边坡主体,需要正确把握其物理力学性质。以灵宝市郊区黄土塬新黄土为研究对象,按总体样本、粉土及粉质粘土统计分析9项物理性质指标、4项强度力学指标及峰度与偏度。分析了指标的取值规律,对比了西安郊区的黄土相关指标,分析了指标间的差异。选取了10种常见概率分布函数进行指标假设检验,对比了各指标的分区频度图、拟合其概率分布函数。研究了各指标的概率分布函数规律及其显著性。为科学掌握新黄土的工程地质性质及工程建设设计取值提供参考。

The labile physico-mechanical properties of the New Loess frequently as building foun-dations or geotechnic slopes need to be ascertained properly.9 Physical and 4 mechanical characteristics of the silt,the silty clay and the total samples of the New Loess in city Lingbao are statistically analyzed. Regularities of the index values presented are compared with that of loess in Xi’an,and the difference is discussed.The probability distributions of the indices are determined by hypothesis testing.The frequen-cy and the fitting probability distribution of index values are compared.