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浅埋松散围岩中有限元方法应用的进一步研究

李宁, 曲星, 姚显春, 刘乃飞

李宁, 曲星, 姚显春, 刘乃飞. 浅埋松散围岩中有限元方法应用的进一步研究[J]. 岩土工程学报, 2012, 34(8): 1475-1482.
引用本文: 李宁, 曲星, 姚显春, 刘乃飞. 浅埋松散围岩中有限元方法应用的进一步研究[J]. 岩土工程学报, 2012, 34(8): 1475-1482.
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LI Ning, QU Xing, YAO Xian-chun, LIU Nai-fei. Further researches on finite element method in tunnels with shallow overburden and loosen rock mass[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(8): 1475-1482.
Citation: LI Ning, QU Xing, YAO Xian-chun, LIU Nai-fei. Further researches on finite element method in tunnels with shallow overburden and loosen rock mass[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(8): 1475-1482.
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浅埋松散围岩中有限元方法应用的进一步研究  English Version

  • 西安理工大学岩土工程研究所，陕西 西安 710048

基金项目: 国家自然科学基金项目（50879068）
详细信息
    作者简介:

    李 宁(1959– )，男，博士，教授，博士生导师，主要从事岩体动力学、地下洞室、边坡稳定性分析与冻土工程等方面的教学与研究工作。

  • 中图分类号: TU47

Further researches on finite element method in tunnels with shallow overburden and loosen rock mass

  • (Institute of Geotechnical Engineering，Xi'an University of Technology, Xi'an 710048, China)

摘要

    摘要
  • 摘要: 对已提出的基于浅埋松散围岩的拟塌落拱离散化有限元稳定性分析方法做了进一步研究。与其它数值仿真分析方法进行了对比，提出了该方法的明确定义及适用范围；通过与常规有限元方法计算结果的对比，进一步证明了该方法计算结果的合理性，能够更真实的反映浅埋松散围岩在近地表、滑裂面与地表相交部位、洞室顶部以及拱脚、边墙底部等部位的围岩受拉情况及松散破碎围岩内部的屈服破坏以及岩体向洞内塌落的趋势，从而真实揭露出围岩发生拉裂、压坏并掉块的现象；以洞顶位移是否收敛为判断依据，初步探讨了离散界面参数以及离散块体大小对计算结果的影响，证明了塌落拱离散化有限元法在技术及工程上应用的可行性。
    Abstract: Further researches on discretization finite element simulation of collapsing arch based on loose surrounding rock in shallow-buried tunnels are performed. First of all, they are compared with other numerical simulation methods and the definition and the applicable scope are put forward. Compared with the results of the common finite element methods, it is further proved that the proposed method is reasonable and can more realistically reflect the tensile state of the surrounding rock in the near-surface, the intersecting site of slip surface with surface, the arch crown, the arch and the sidewall bottom, the yield damage of loose rock and the collapse trend of rock mass tunnel, so as to reveal the tensile breaking, fracturing and sloughing of rock. By regarding whether or not the displacement of the arch crown is convergent as the judgement basis, the influences of discrete interface parameters and block sizes on the results are preliminarily discussed, showing that the discrete DFEM is feasible in technical and project application.
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    • 参考文献(31)
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出版历程
  • 收稿日期:  2011-05-12
  • 发布日期:  2012-08-19

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