杭州地区海相软土物理力学指标相关性分析

Analysis on Correlation of Physical and Mechanical Indexes of Marine Soft Soil in Hangzhou Area

以杭州地区海相软土为研究对象,搜集区域内1028个软土试样进行统计分析,并研究物理力学指标间的相关关系。结果表明:杭州地区海相软土具有高含水量、高孔隙比、高压缩性、低密度、低抗剪强度等特点;各物理指标间的相关程度显著,回归方程可靠;物理指标w,e,ρ与压缩系数a具有较强的线性关系,但与压缩模量Es线性相关性较低;采用多元拟合分析方法,黏聚力cq与w,e,Ip的多元线性回归方程可靠度较高,内摩擦角φq与物理指标的相关性一般。

Taking the marine soft soil in Hangzhou area as research objec,1028 soft soil samples in Hangzhou area were collected,the correlation between the physical and mechanical indexes of soft soil was studied.The results show that the marine soft soil in Hangzhou area has the characteristics of high water content,high void ratio,high compressibility,low density and low shear strength.The correlation between physical indexes is significant and the regression equation is reliable.The physical indexes w,e,ρ have a strong linear relationship with the compression coefficient a,but have a low linear relationship with the compression modulus Es.The reliability of multiple linear regression equation of cohesion cq and w,e,Ip is higher,and the correlation between internal friction angleφq and physical index is general by using multivariate fitting analysis method.