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地下水渗流作用下的盾构隧道开挖面安全系数上限分析

黄阜, 潘秋景, 凌同华

黄阜, 潘秋景, 凌同华. 地下水渗流作用下的盾构隧道开挖面安全系数上限分析[J]. 岩土工程学报, 2017, 39(8): 1461-1469. DOI: 10.11779/CJGE201708013
引用本文: 黄阜, 潘秋景, 凌同华. 地下水渗流作用下的盾构隧道开挖面安全系数上限分析[J]. 岩土工程学报, 2017, 39(8): 1461-1469. DOI: 10.11779/CJGE201708013
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HUANG Fu, PAN Qiu-jing, LING Tong-hua. Upper bound analysis of factor of safety for shield tunnel face subjected to underground water seepage[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(8): 1461-1469. DOI: 10.11779/CJGE201708013
Citation: HUANG Fu, PAN Qiu-jing, LING Tong-hua. Upper bound analysis of factor of safety for shield tunnel face subjected to underground water seepage[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(8): 1461-1469. DOI: 10.11779/CJGE201708013
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地下水渗流作用下的盾构隧道开挖面安全系数上限分析  English Version

  • 1. 长沙理工大学土木工程学院,湖南 长沙 410004;
    2. 约瑟夫傅里叶大学法国国家科学研究院3SR实验室,法国 格勒诺布尔

基金项目: 国家自然科学基金项目（51308072,51678071）; 湖南省教育厅科研项目（15C0052）; 长沙理工大学土木工程优势特色重点学科创新性项目（15ZDXK13）; 国家留学基金项目（国家建设高水平大学公派研究生项目）
详细信息
    作者简介:

    黄 阜(1983- ),男,博士,副教授,主要从事隧道与地下工程稳定性研究。E-mail: hfcsu0001@163.com。

Upper bound analysis of factor of safety for shield tunnel face subjected to underground water seepage

  • 1. School of Civil Engineering, Changsha University of Science & Technology, Changsha 410004, China;
    2. Laboratory 3SR, Joseph-Fourier University, CNRS UMR 5521, Grenoble, France

摘要

    摘要
  • 摘要: 利用数值模拟技术对地下水渗流情况下盾构隧道开挖面的渗流场进行模拟,获得了隧道开挖面周边各节点的孔隙水压力。基于极限分析上限定理,利用各节点孔隙水压力计算出隧道开挖面上限破坏机制中的孔隙水压力功率,并将其视为一个外力功率代入虚功率方程中,构建出考虑渗流影响的开挖面安全系数目标函数。通过非线性序列二次规划法对该目标函数进行优化计算,得到开挖面安全系数上限解。利用强度折减法验证了该方法的有效性,并将其用于考虑地下水渗流作用的盾构隧道工程实例分析。研究表明：在考虑地下水渗流的情况下,开挖面安全系数随土体黏聚力、摩擦角、开挖面支护力的增大而增大,随地下水位的升高而减小;开挖面的破坏范围随摩擦角的增大而显著减小,但地下水位线的位置对开挖面的破坏范围影响较小。
    Abstract: Based on the numerical simulation technique, the seepage fields of shield tunnel face are simulated, and the pore water pressures of the nodes adjacent to the tunnel face are obtained. Using the pore pressures of the nodes, the work rate of the pore pressures of the upper bound failure mechanism is derived. The work rate of the pore pressures regarded as a work rate of external force is included in the equation for virtual work rate, and the objective function for factor of safety for tunnel face is established in the framework of upper bound theorem. Using the nonlinear sequential quadratic programming, the upper bound solution of the factor of safety is obtained. By comparing the solution with the results derived from strength reduction method, the validation of the proposed method is verified. Moreover, this method is applied to a shield tunnel which takes account of the effect of seepage to investigate the stability of the tunnel face. The study indicates the factor of safety for tunnel face increases with the increase of cohesion, friction angle and supporting pressure, but decreases with the increase of underground water level. The failure range of the tunnel face decreases with the increase of friction angle observably, but the underground water level has slight influence on the failure range of the tunnel face.
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    • 参考文献(14)
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出版历程
  • 收稿日期:  2016-05-16
  • 发布日期:  2017-08-24

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