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

作　　者：卫俊杰 凌飞 陈玉林 冷紫旺 胡正 戴北冰 刘建坤 WEI Junjie;LING Fei;CHEN Yulin;LENG Ziwang;HU Zheng;DAI Beibing;LIU Jiankun(School of Civil Engineering,Sun Yat-sen University,Zhuhai 519082,China;State Key Laboratory for Tunnel Engineering,Guangzhou 510275,China;Zhuhai Rail Transit Company Limited,Zhuhai 519100,China;China Railway Tunnel Bureau Group Company Limited Shield Engineering Branch,Zhengzhou 450007,China)

机构地区：[1]中山大学土木工程学院,广东珠海519082 [2]隧道工程灾变防控与智能建养全国重点实验室,广东广州510275 [3]珠海市轨道交通有限公司,广东珠海519100 [4]中铁隧道局集团有限公司大盾构工程分公司,河南郑州450007

出　　处：《中山大学学报（自然科学版）（中英文）》2024年第4期132-140,共9页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金(52008409);广东省自然科学基金(2023A1515012140)。

摘　　要：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.

关 键 词：富水软土 HSS模型 参数分析 试验 

分 类 号：TU447[建筑科学—岩土工程]