珠海富水软土小应变硬化参数试验研究

Experimental study on parameters of small strain hardening model of Zhuhai soft soil with high water content

基于三轴排水、标准固结等室内试验,并结合经验方程,标定了珠海富水土体的成套HSS模型参数,并分析了主要强度参数E_(50)^(ref)、E_(oed)^(ref)、G_(0)^(ref)和E_(ur)^(ref)的比例关系,为珠海地区不同土层的HSS模型参数取值及计算提供参考。研究发现,珠海地区黏土的小应变参考剪切模量G_(0)^(ref)高于砂土,且远高于淤泥质黏土。与长三角等滨海地区相比,珠海地区的黏土因含水率较高,其参考割线模量E_(50)^(ref),参考加卸载模量E_(ur)^(ref),参考切线模量E_(oed)^(ref)和参考剪切模量G_(0)^(ref)均较低。

This study completed a series of laboratory tests to obtain all HSS model parameters of water-rich soft soil in Zhuhai area,and analyzed the proportional relationship between the modulus of key parameters E_(50)^(ref),E_(oed)^(ref),G_(0)^(ref) and E_(ur)^(ref),providing an important supplement to the HSS model parame ters of different soil layers in Zhuhai area.Compared with the results in the literature,it is found that the small strain reference shear modulus G_(0)^(ref) of the clay in Zhuhai area is higher than that of the sand.Compared with other coastal areas such as the Yangtze River Delta,the water content of Zhuhai clay is higher,and its reference secant modulus E_(50)^(ref),reference loading and unloading modulus E_(ur)^(ref),reference tan gent modulus E_(oed)^(ref) and reference shear modulus G_(0)^(ref) are lower.