水利学报2017，Vol.48Issue(6)：710-719,10.DOI:10.13243/j.cnki.slxb.20161231
基于单线法试验的黄土增湿变形非线性模型研究
Study on nonlinear constitutive model for loess moistening deformation based on single-line experiment method
摘要
Abstract
Loess moistening deformation,generally caused by surface water infiltration or the rise of underground water level,is a critical technical problem to be solved in geotechnical engineering.The existing constitutive model can be used to describe loess moistening deformation.However,it is still greatly different from the acting path of stress and water in actual foundation.This paper introduces the concept of humidification level to describe the moisture condition of soil.With stepped wetting tests on original loess,the correlations between soil moistening deformation and moisture condition during wetting process under the action of stress were analyzed,and the nonlinear constitutive model for loess moistening deformation has been established.The relationship curves of humidification level and the ratio between humidification deformation coefficient and collapsibility coefficient are used to reflect the sensitivity of loess moistening deformation.Besides,it also deals with the influence of vertical stress and properties of loess on the sensitivity of loess moistening deformation.The lateral deformation characteristics in humidifying process are analyzed by adopting humidification levels and lateral deformation relationship curves with different stress ratios.关键词
黄土/增湿变形/增湿水平/本构模型/敏感性/侧向变形Key words
loess/moistening deformation/humidification level/constitutive model/sensitivity/lateral deformation分类
建筑与水利引用本文复制引用
金松丽,邢义川,赵卫全,张爱军,郭敏霞..基于单线法试验的黄土增湿变形非线性模型研究[J].水利学报,2017,48(6):710-719,10.基金项目
国家自然科学基金项目(51379220,51279171) （51379220,51279171）
