珠江三角洲软土物理力学指标统计分析

Statistic Analysis of Physical and Mechanical Indexes of Soft Soil in Zhujiang Delta

收集了珠江三角洲地区158个原状软土的物理力学指标数据,对指标的变化范围、变异性、指标间的相互关系和各指标的统计分布规律进行研究。研究的结果表明:不同地区软土的物理力学性质差异较大;各参数与含水量ω、孔隙比e存在一定的关系;天然密度ρ、干密度ρd、液限lω、塑限ωp、塑性指数Ip、无侧限抗压强度qu和灵敏度St服从正态分布;含水量、孔隙比和粘聚力服从近似正态分布;饱和度Sr、比重Gs、渗透系数Kv、压缩系数av1-2、压缩模量Es1-2和内摩擦角为非正态分布。研究的结果对开展软土工程有一定的意义。

Change confines, variability, correlation of indexes and statistical distribution regularity of physical and mechanical indexes were analysed based on collecting 158 physical and mechanical indexes data of un-disturb soft soil in Zhujiang Delta area. The study result shows that, physical and mechanical indexes of soft soil in different places are different greatly; indexes are related to ω and e; ρ, ρd, ω1, ωp, Ip, qu and st obey normal distribution;nature moisture content, aperture rate and cohesion obey normal distribution approximately; Sr, ds, k, a v1-2, Es1-2 and Ф are abnormal distribution.The study consequence has some significance for soft soil engineering.