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深埋盾构隧道同步注浆施工扰动力学问题研究

叶飞, 郭华伟, 段智军, 梁兴, 王思宇, 王斌

叶飞, 郭华伟, 段智军, 梁兴, 王思宇, 王斌. 深埋盾构隧道同步注浆施工扰动力学问题研究[J]. 岩土工程学报, 2019, 41(5): 855-863. DOI: 10.11779/CJGE201905008
引用本文: 叶飞, 郭华伟, 段智军, 梁兴, 王思宇, 王斌. 深埋盾构隧道同步注浆施工扰动力学问题研究[J]. 岩土工程学报, 2019, 41(5): 855-863. DOI: 10.11779/CJGE201905008
shu
YE Fei, GUO Hua-wei, DUAN Zhi-jun, LIANG Xing, WANG Si-yu, WANG Bin. Disturbance mechanical problems induced by synchronous grouting in deep shield tunnels[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(5): 855-863. DOI: 10.11779/CJGE201905008
Citation: YE Fei, GUO Hua-wei, DUAN Zhi-jun, LIANG Xing, WANG Si-yu, WANG Bin. Disturbance mechanical problems induced by synchronous grouting in deep shield tunnels[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(5): 855-863. DOI: 10.11779/CJGE201905008
shu

深埋盾构隧道同步注浆施工扰动力学问题研究  English Version

  • 长安大学公路学院,陕西 西安 710064

基金项目: 国家自然科学基金面上项目（51678062,51878060）
详细信息
    作者简介:

    叶飞(1977— ),男,教授,博士生导师,主要从事隧道及地下工程方面的研究工作; E-mail: xianyefei@126.com

  • 中图分类号: TU45

Disturbance mechanical problems induced by synchronous grouting in deep shield tunnels

  • School of Highway, Chang'an University, Xi'an 710064, China

摘要

    摘要
  • 摘要: 为研究深埋盾构隧道施工过程中同步注浆对周边土体及既有连拱隧道的扰动影响,将同步注浆浆液对土体的作用简化为无限空间土体中的柱孔扩张问题,基于柱形扩孔理论和统一强度理论,考虑同步注浆时浆液渗流对土体的作用,建立了同步注浆施工扰动力学模型,推导了同步注浆扰动下周围土体弹塑性区内应力场、应变场及位移场的理论计算公式。并以西安地铁四号线航—航区间盾构隧道为例进行了算例分析,研究表明：①注浆渗透压力对塑性区范围的影响显著大于注浆压力对塑性区范围的影响,可通过控制注浆渗透压力来减少注浆扰动范围;②新建盾构隧道在近距离侧穿既有连拱隧道时,同步注浆产生的施工扰动影响显著,可实时调整同步注浆的注浆压力、注浆量及采取隔离加固措施,确保安全通过。
    Abstract: In order to study the disturbance influences of the surrounding soils and the existing double-arch tunnels induced by the synchronous grouting during the construction of deep shield tunnels, the effect of grouting on soils during the synchronous grouting is simplified as the problem of cylindrical cavity expansion in the infinite space. Considering the seepage effect of grouting on soils during the synchronous grouting, the construction disturbance mechanical model of synchronous grouting is established on the basis of the cylindrical cavity expansion theory and unified strength theory. The theoretical formulas for stress field, strain field and displacement field in the elastic-plastic zone under the influence of the synchronous grouting disturbance are deduced. The Hang to Hang zone shield tunnel of Xi’an subway No. 4 line is taken as an example. The results show that: (1) The influence of the grouting penetration pressure on the plastic zone is significantly greater than that of the grouting pressure on the plastic zone, which indicates the grouting disturbance zone can be reduced by controlling the grouting penetration pressure. (2) The significantly apparent disturbance influence of the existing tunnel under the action of the synchronous grouting when the adjacent double-arch tunnel is passed by newly-bulit shield tunnel, the grouting pressure and grouting capacity can be adjusted in real time, and the isolation and reinforcement measures are adopted to ensure the passing safety.
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    • 参考文献(15)
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  • 收稿日期:  2018-09-08
  • 发布日期:  2019-05-24

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