基于路基面不均匀变形的路堤地基差异沉降限值研究  

Limit Value of the Differential Settlement of Embankment Foundation Based on Uneven Deformation of Subgrade Surface

作　　者：李铁[1] 罗强[1] 王佳敏[1] 陈虎[1] 刘潇潇[1] 

机构地区：[1]西南交通大学高速铁路线路工程教育部重点实验室,成都610031

出　　处：《长江科学院院报》2012年第2期90-94,共5页Journal of Changjiang River Scientific Research Institute

摘　　要：根据路堤地基差异沉降的特性,建立了错台式和渐变式路堤地基差异沉降计算模型。运用有限元计算方法,对路堤地基差异沉降引起的路基面变形规律进行了讨论,并对有限元计算结果的可靠性进行了土工离心模型试验的验证。提出了基于路基面不均匀变形限值的地基差异沉降控制标准。分析表明:地基差异沉降限值受路堤高度、地基差异沉降渐变段长度影响;随着路堤高度的增加或地基差异沉降渐变段长度的加大,地基差异沉降限值均呈增大趋势。Based on the property of differential settlement of embankment foundation, models of discontinuous and continuous settlement are established. Through finite element model calculation, the discipline of subgrade surface deformation caused by differential settlement of the foundation is studied, and the results of finite element calcula- tion are verified by centrifugal model tests. The limit value of differential settlement of the ground is established. The research results show that the limit value of differential settlement raises as the embankment height or transition length of differential settlement increases.

关 键 词：路基面不均匀变形 路堤地基差异沉降 控制限值 

分 类 号：U213.1[交通运输工程—道路与铁道工程]