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基坑开挖对既有地铁隧道影响的实测及数值分析

胡海英, 张玉成, 杨光华, 钟志辉, 陈富强

胡海英, 张玉成, 杨光华, 钟志辉, 陈富强. 基坑开挖对既有地铁隧道影响的实测及数值分析[J]. 岩土工程学报, 2014, 36(zk2): 431-439. DOI: 10.11779/CJGE2014S2075
引用本文: 胡海英, 张玉成, 杨光华, 钟志辉, 陈富强. 基坑开挖对既有地铁隧道影响的实测及数值分析[J]. 岩土工程学报, 2014, 36(zk2): 431-439. DOI: 10.11779/CJGE2014S2075
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HU Hai-ying, ZHANG Yu-cheng, YANG Guang-hua, ZHONG Zhi-hui, CHEN Fu-qiang. Measurement and numerical analysis of effect of excavation of foundation pits on metro tunnels[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(zk2): 431-439. DOI: 10.11779/CJGE2014S2075
Citation: HU Hai-ying, ZHANG Yu-cheng, YANG Guang-hua, ZHONG Zhi-hui, CHEN Fu-qiang. Measurement and numerical analysis of effect of excavation of foundation pits on metro tunnels[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(zk2): 431-439. DOI: 10.11779/CJGE2014S2075
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基坑开挖对既有地铁隧道影响的实测及数值分析  English Version

  • 1. 华南农业大学水利与土木工程学院,广东 广州 510642;
    2. 广东省水利水电科学研究院,广东 广州 510610;
    3. 广东省岩土工程技术研究中心,广东 广州 510610;
    4. 广东省突发公共事件应急技术研究中心,广东 广州 510610;
    5. 武汉大学土木建筑工程学院,湖北 武汉 430072

基金项目: 国家自然科学基金项目（51378131）; 广东省水利科技创新基金项目（2009-25）; 广东省公路管理局科技基金项目（2012-09）
详细信息
    作者简介:

    胡海英(1976- ),女,辽宁省营口人,高级工程师,从事岩土工程方面教学和研究工作。E-mail: 282392530@qq.com。

Measurement and numerical analysis of effect of excavation of foundation pits on metro tunnels

  • 1. College of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642;
    2. Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, China;
    3. The Geotechnical Engineering Technology Center of Guangdong Province, Guangzhou 510610, China;
    4. The Emergency Technology Research Center of Guangdong Province for Public Events Guangzhou 510610, China;
    5. School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China

摘要

    摘要
  • 摘要: 近几年随着大城市地下空间的快速开发,对中心城区地下空间的基坑设计不仅要关注基坑本身的安全问题,更需要关注基坑工程对周围建（构）筑物的影响问题。因此,需将基坑工程和环境作为一个整体来考虑设计。在总结地铁工程控制标准与保护技术的基础上,以广州某临近既有地铁隧道的深基坑开挖为案例,通过数值模拟和隧道实测手段综合分析了基坑开挖对地铁隧道的影响。实测结果表明,基坑开挖期间对于隧道不一定是卸荷影响,有时也会增加隧道围压,这与基坑开挖深度以及隧道与基坑的位置关系有关,也与基坑支护结构施工方法有关,应结合具体力学传递路径来确定是卸荷还是加荷影响。数值计算结果与隧道实测结果比较接近,说明数值建模的边界条件和参数选择是比较符合实际工况,本文成果可为类似工程优化设计和施工提供有益的参考和借鉴。
    Abstract: With the rapid development of underground space in large cities in recent years, the design of foundation pits of underground space in urban areas should focus on their safety, especially on their influence on the adjacent buildings. Therefore, it needs to consider the foundation pit and the environment as a whole during design. On the basis of the summary of control standards and protection techniques of metro engineering, taking a deep foundation pit near the metro tunnel in Guangzhou as an example, the effect of its excavation on the metro tunnel is synthetically analyzed through numerical simulation and measurement. The measured results show that excavation doses not always have unloading effect on the tunnel, sometimes, it will increase the confining pressure on the tunnel. The influence relates to the depth of excavation and the site of the tunnel as well as the construction method of supporting structure for the foundation pit. Thus, the actual mechanical transmission path should be considered to determine the unloading or loading influence. The numerical results are close to the measured ones, indicating that the boundary conditions and computational parameters of the numerical model are compared with the actual working conditions. The achievements may provide beneficial reference for the optimal design, construction and similar projects.
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    • 参考文献(16)
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出版历程
  • 收稿日期:  2014-07-27
  • 发布日期:  2014-07-27

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