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桩承式路堤中土拱效应产生机理研究

庄妍, 崔晓艳, 刘汉龙

庄妍, 崔晓艳, 刘汉龙. 桩承式路堤中土拱效应产生机理研究[J]. 岩土工程学报, 2013, 35(zk1): 118-123.
引用本文: 庄妍, 崔晓艳, 刘汉龙. 桩承式路堤中土拱效应产生机理研究[J]. 岩土工程学报, 2013, 35(zk1): 118-123.
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ZHUANG Yan, CUI Xiao-yan, LIU Han-long. 3D FE analysis of arching in a piled embankment[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(zk1): 118-123.
Citation: ZHUANG Yan, CUI Xiao-yan, LIU Han-long. 3D FE analysis of arching in a piled embankment[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(zk1): 118-123.
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桩承式路堤中土拱效应产生机理研究  English Version

  • 1. 岩土力学与堤坝工程教育部重点实验室，江苏 南京 210098；2. 河海大学岩土工程科学研究所，江苏 南京 210098

基金项目: 国家自然科学基金高铁联合基金项目（U1134207）；国家自然科学基金青年项目（51108155）；江苏省“333”计划资助项目（BRA2011146）；中国博士后科学基金面上资助项目（2012M511670）
详细信息
    作者简介:

    庄 妍(1982- )，女，博士，副教授，主要从事软基处理方面的教学与科研工作。E-mail: Joanna_zhuang@163.com。

  • 中图分类号: TU470

3D FE analysis of arching in a piled embankment

  • 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Nanjing 210000, China; 2. Geotechnical Research Institute, Hohai University; Nanjing 210000, China

摘要

    摘要
  • 摘要: 土拱效应的形成条件和荷载传递机理是刚性桩复合地基桩-土协调共同作用的关键性技术问题。基于ABAQUS三维有限元数值软件，研究路堤填土性质、路堤高度、桩间距等因素对土拱效应的形成和荷载传递特性的影响规律，分析路堤以及软土中应力和应变发展规律。研究结果表明：路堤高度h与桩间距s比值对土拱效应产生具有重要影响，当h / s ≤ 0.5时，没有土拱效应产生；当0.5 ≤ h / s ≤ 1.5时，土拱效应没有完全产生；当1.5 ≤ h / s时，产生完整的土拱效应；桩承式路堤中最大拱效应发挥作用时，桩间土所受竖向极限应力与路堤填土自重比值σs,ult /γh约在0.2～0.4之间；土拱效应作用下，路堤填料中土体发生破坏的部位与桩间距和土体性质有关。
    Abstract: There is no a generally accepted approach for the design of piled embankments. A series of three-dimensional finite element analyses are presented to examine the performance of piled embankments. The analyses show that when h/ s≤ 0.5, there is virtually no effect of arching, when 0.5 ≤ h/ s≤ 1.5, there is an increasing evidence of arching, and when 1.5 ≤ h/ s, full arching is observed. The ultimate stress on the subsoil (σs,ult) at the point of maximum arching normalized by γh. ranges 20% to 40 %.
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出版历程
  • 收稿日期:  2013-02-28
  • 发布日期:  2013-07-18

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