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砂土盾构隧道掘进开挖面稳定理论与颗粒流模拟研究

缪林昌, 王正兴, 石文博

缪林昌, 王正兴, 石文博. 砂土盾构隧道掘进开挖面稳定理论与颗粒流模拟研究[J]. 岩土工程学报, 2015, 37(1): 98-104. DOI: 10.11779/CJGE201501011
引用本文: 缪林昌, 王正兴, 石文博. 砂土盾构隧道掘进开挖面稳定理论与颗粒流模拟研究[J]. 岩土工程学报, 2015, 37(1): 98-104. DOI: 10.11779/CJGE201501011
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MIU Lin-chang, WANG Zheng-xing, SHI Wen-bo. Theoretical and numerical simulations of face stability around shield tunnels in sand[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 98-104. DOI: 10.11779/CJGE201501011
Citation: MIU Lin-chang, WANG Zheng-xing, SHI Wen-bo. Theoretical and numerical simulations of face stability around shield tunnels in sand[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 98-104. DOI: 10.11779/CJGE201501011
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砂土盾构隧道掘进开挖面稳定理论与颗粒流模拟研究  English Version

  • 1. 东南大学交通学院岩土工程研究所,江苏 南京 210096; 2. 南通市城市建设工程管理中心,江苏 南通 226153

基金项目: 国家自然科学基金项目（11272194）; 上海市自然科学基; 金项目（13ZR1416200）
详细信息
    作者简介:

    缪林昌(1961- ),男,教授,博士生导师,主要从事盾构施工对环境影响方面的研究。E-mail: lc.miao@seu.edu.cn。

  • 中图分类号: TU43

Theoretical and numerical simulations of face stability around shield tunnels in sand

  • 1. Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China; 2. Management Center of City Construction Projects, Nantong 226153, China

摘要

    摘要
  • 摘要: 盾构法隧道施工过程中,土体密实度对开挖面极限支护力值与稳定性影响是一个非常重要的因素。基于Kirsch室内模型试验,采用颗粒流计算分析了隧道掘进过程中土体密实度对开挖面极限支护力、残余支护力以及开挖面前方土体孔隙比变化的影响,从细观角度解释了砂土中盾构隧道开挖面失稳机理,分析了砂土中盾构隧道掘进时土体破坏形态与分布范围;进而提出了计算开挖面极限支护力的改进楔形体分析模型。研究成果可为盾构隧道施工中分析开挖面的稳定提供参考。
    Abstract: The soil density is a key factor for the studies on the limit support pressure and the face stability operation during tunneling construction. Based on the Kirsch’s laboratory model tests, the PFC2D is employed to investigate the influence of soil density on the limit support pressure, residual support pressure and void ratio in the heading face. The failure mechanisms of the excavation face are investigated at the mesoscopic level. The failure behavior and arrange of the face stability of the shield tunnels in sand are analyzed. The improved wedge model is proposed as a method for calculating the limit support pressure of face. It may provide certain guidance to the stabilization of excavation face of shield tunnels.
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    • 参考文献(22)
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出版历程
  • 收稿日期:  2014-04-01
  • 发布日期:  2015-01-19

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