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
卫俊杰 1凌飞 2陈玉林 3冷紫旺 2胡正 1戴北冰 1刘建坤1
作者信息
- 1. 中山大学土木工程学院,广东 珠海 519082;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
- 2. 珠海市轨道交通有限公司,广东 珠海 519100
- 3. 中铁隧道局集团有限公司大盾构工程分公司,河南 郑州 450007
- 折叠
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Eref50、Erefoed、Gref0 和Erefur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Gref0 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Eref50,参考加卸载模量Erefur,参考切线模量Erefoed和参考剪切模量Gref0 均较低.
Abstract
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 Eref50,Erefoed,Gref0 and Erefur,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 Gref0 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 Eref50,reference loading and unloading modulus Erefur,reference tan-gent modulus Erefoed and reference shear modulus Gref0 are lower.
关键词
富水软土/HSS模型/参数分析/试验Key words
soft soil with high water content/HSS model/parameters analysis/tests引用本文复制引用
基金项目
国家自然科学基金(52008409)
广东省自然科学基金(2023A1515012140)
出版年
2024