摘要
在结构性的作用下,结构性土的力学特性与重塑土相比存在显著区别.基于结构性土的变形特性,引入结构性土的本征压缩曲线,提出了表征土体结构性的结构性因子,通过该参量推导了结构性土的体变方程,并给出了结构性因子的发展准则,结合修正剑桥模型建立了结构性土的本构模型.该模型与原修正剑桥模型相比,增加了3个参数.最后通过两种结构性土的试验数据对所提模型进行了验证,证明了所提模型的合理性.
Structured soils exhibit significant different mechanical behaviours compared to the remoulded soils due to the influence of soil structure.Intrinsic compression line for structured soils is introduced based on the deformation behaviours.Structural factor is proposed to characterize the soil structure.Volume change equation of structured soils is established by incorporating structural factor.And the evolution law for structural factor is proposed.A constitutive model for structured soils is proposed based on the modified Cam-clay model.Three new parameters are added to the proposed model compared to the original model.The proposed model is validated by the experimental data of two kinds of structured soils.
作者
李吴刚
杨钢
刘文化
孙秀丽
LI Wugang;YANG Gang;LIU Wenhua;SUN Xiuli(School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China)
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2021年第1期84-91,共8页
Journal of Dalian University of Technology
基金
大连理工大学海岸和近海工程国家重点实验室开放基金资助项目(LP1909)
国家自然科学基金青年基金资助项目(51705129)
江苏省自然科学基金青年基金资助项目(BK20170187)
中央高校基本科研业务费专项资金资助项目(JUSRP11940).
关键词
结构性土
本构模型
结构性因子
孔隙比
压缩曲线
structured soils
constitutive model
structural factor
void ratio
compression line
