长江科学院院报 ›› 2012, Vol. 29 ›› Issue (2): 84-90.

• 全国土工离心模拟技术学术交流会专栏 • 上一篇    

基于路基面不均匀变形的路堤地基差异沉降限值研究

李  铁，罗  强，王佳敏，陈  虎，刘潇潇   

  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
  • 收稿日期:2011-10-20 出版日期:2012-02-01 发布日期:2012-03-19
  • 作者简介:李 铁(1987-)，男，辽宁凌源人，硕士研究生，主要从事路基工程研究

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

LI Tie, LUO Qiang, WANG Jia-min, CHEN Hu, LIU Xiao-xiao   

  1. MOE Key Laboratory of High-speed Railway Engineering of Southwest Jiaotong University,  Chengdu  610031, China
  • Received:2011-10-20 Online:2012-02-01 Published:2012-03-19

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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。

Abstract:

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 calculation 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.

Key words: uneven deformation of subgrade surface, differential settlement of embankment foundation, limit value controlling

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