摘要
通过对软土基坑现场位移监测资料的比较分析 ,提出了三元件线性粘弹性土体本构模型及其模型参数的反分析方法 .在此基础上 ,建立了可考虑土体流变性态的二维施工模拟有限元模型 .同时依据所提出的计算模型 ,详细探讨了不同的分步开挖工况条件下坑底和坑周地层移动的规律 .其结论可为施工技术及坑周环境保护提供指导性依据和对策 .图 3。
Through comparison and analysis of displacements measured in the field,three element linear viscoelastic constitutive model of the soil and its back analysis method of the parameters were raised. On the basis of this, the two dimensional FE model that can consider rheology of soil and simulate the staged construction of excavation was set up. According to this model,the paper studied in details the rules of strata deformation in the bottom of foundation pit and round it for staged construction of excavation. The results can guide the construction and environmental protection.3figs.,5refs.
出处
《湘潭矿业学院学报》
2002年第1期1-4,共4页
Journal of Xiangtan Mining Institute
基金
湖南省自然科学基金资助项目 (编号 :0 0 JJY2 0 55)
关键词
基坑
土体流变
分步开挖
地层移动
有限元
本构模型
foundation pit
rheology of soil
staged construction
strata deformation
FEM
