黄骅港地区黏性土物理力学指标间相关性分析

Correlation analysis on physico-mechanical properties of clayey soil in Huanghua port area

采用回归方法对黄骅港地区20个勘察项目的土工试验结果进行了深入的统计分析,并给出了该地区黏性土物性指标之间及其与力学指标间的经验关系式和相关系数。统计分析表明,含水率w、密度ρ、干密度ρd、孔隙比e之间有很好的相关性,且相关系数均大于0.95;物性指标与变形指标之间的相关性分析结果表明,含水率w、干密度ρd、孔隙比e与变形指标的相关性都较好,尤其是与压缩系数av的相关系数均大于0.93;物性指标与不同试验方法得到的强度指标之间的相关性分析结果表明,含水率w、干密度ρd、孔隙比e与不同试验方法得到的内摩擦角φ的相关性较好,且相关系数均大于0.83,但均与粘聚力c不相关。

In this paper,the regression method is used to make an in-depth statistical analysis of the geotechnical test results of 20 investigation projects in Huanghua port area,and the empirical relations and correlation coefficients between the physical properties of cohesive soil and the mechanical indexes are also given. The results of statistical analysis show that,correlation coefficients among water content,density,dry density and void ratio are above 0. 95,displaying a good relevance. In addition,correlation analysis between physical properties and deformation indexes are also performed,and high correlation coefficients dispaly good relevance between water content,dry density,void ratio and deformation indexes,in particular,the correlation coefficients with the compression coefficient avare greater than 0. 93. The results of correlation analysis between physical property indexes and strength indexes obtained by different test methods show that,correlation coefficients between water content,dry density,void ratio and angle of internal friction by different test methods are greater than 0. 83,however,they have no significant correlation with cohesive force.