摘要
基于Merchant粘弹性模型,应用Biot平面固结有限元法,以现场实测资料为依据,采用了直接优化的分析方法,针对多层软土地基多设计变量反演解的唯一性问题,在对土体分层的基础上对反演策略作了改进,将反演参数分成2个部分,先分层迭代反演渗透系数,再分层迭代反演粘弹性参数,然后以反演所得参数来计算预测工后沉降,最后通过工程实例说明了这种策略的可行性。
Based on the 2- D Biot＇ s consolidation FEM of the Merchant＇ s viscoelastic model and observed data, the parameters of soil are determined by direct optimal method. Then, the post settlement is predicted according to the back-analysis results. A new iterative method is put forward to solve the well-posed problem of parameters＇ back-analysis for layered soft ground, that is, coefficient of permeability and parameters of model are back-analyzed successively as two parts. At last, a case is used to illustrate that the new iterative method is feasible.
出处
《中南公路工程》
2005年第4期9-12,共4页
Central South Highway Engineering
基金
国家自然科学基金资助项目(50278089)
浙江省自然科学基金项目(501163)
关键词
软土地基
粘弹性
反演
沉降
预测
viscous-elasticity
back-analysis
settlement
prediction
