摘要
阐述了二维平面应变比奥固结理论及其具体的有限元格式,详细介绍了砂井地基的两类平面应变等效方法及其原理.结合江西城门山铜矿凤爪沟尾矿坝软基处理实践,采用了以修正剑桥本构关系为基础的渗流变形耦合模型对尾矿坝施工过程中的砂井地基固结情况进行了有限元数值模拟和预测,对有限元数值模拟结果进行了详细的分析,总结了砂井地基固结过程中的位移、孔隙水压力随时间的变化规律,并与现场监测结果进行了对比、分析.结果表明:实测期内,位移的模拟值及其发展规律与实测结果比较接近,本文所使用的有限元模拟方法可以用来预测砂井地基的固结过程.该数值分析对相类似的砂井地基软基处理工程实践具有一定的指导意义.
The two-dimensional FEM format of Biot＇s consolidation theory is detailedly deduced.two kinds of equivalent plane strain methods and the principles in drain pile ground are introduced.Based on the treatment of soft clay in Fengzhuagou tailings dam of Chengmenshan copper mine located in Jiangxi province,by using modified Cam-clay model coupling Biot theory,numerical simulation is carried out in drain pile ground during the construction of the tailings dam.Based on numerical results,relationships between the displacement of foundation and time,excess pore pressure of foundation and time,are analyzed.Comparing numerical results and the variation with observation by the displacements of the foundation,those calculated results and the variation have a good agreement with those observed.The numerical method in this paper may be used to predict the consolidation process in drain pile ground;those results gained by numerical method may provide reference to engineering practice.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2010年第4期515-518,527,共5页
Engineering Journal of Wuhan University
关键词
比奥固结理论
砂井地基
等效砂墙
尾矿坝
有限元法
Biot＇s consolidation theory
drain pile ground
equivalent sand-wall
tailings dam
finite element method
