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隧道建设(中英文) ›› 2020, Vol. 40 ›› Issue (S2): 196-203.DOI: 10.3973/j.issn.2096-4498.2020.S2.025

• 规划与设计 • 上一篇    下一篇

复杂环境下基坑上跨运营地铁隧道的保护方案研究

田帅   

  1. (广州地铁设计研究院股份有限公司, 广东 广州 510000
  • 出版日期:2020-12-31 发布日期:2021-03-22
  • 作者简介:田帅(1988—),男,河南郑州人,2014年毕业于中国矿业大学,建筑与土木工程专业,硕士,工程师,现从事城市轨道交通及市政隧道设计方面工作。E-mail: shuaitiants@163.com。

Protection Scheme for Running Metro Tunnels under Disturbance of Upper Foundation Pit in Complex Environment

TIAN Shuai   

  1. (Guangzhou Metro Design & Research Institute Co., Ltd., Guangzhou 510000, Guangdong, China)
  • Online:2020-12-31 Published:2021-03-22

摘要: 为解决复杂环境下基坑开挖时下方地铁隧道正常运营的难题,依托郑州某市政管廊上跨地铁区间隧道项目,采用三维数值模拟计算及施工监测数据分析的方法。得出如下结论: 1)通过选取合理的基坑围护方案,可减小基坑围护结构施工对地铁区间隧道的扰动影响; 2)对于工程地质情况较好的地区通过细化上跨基坑开挖方式,采用基底加固+抽条施工的方案可保证地铁区间隧道的正常运营。

关键词: 复杂环境, 盾构隧道, 地铁, 上跨基坑, 开挖卸载

Abstract: The daily running of metro tunnel under complex environment during the excavation of upper foundation pit should be guaranteed. Accordingly, the threedimensional numerical simulation calculation and construction monitoring data analysis methods are adopted for a municipal utility tunnel above a metro tunnel section in Zhengzhou. Conclusions are drawn as follows. (1) By selecting a rational foundation pit retaining plan, the disturbance on metro tunnel induced by foundation pit retaining structure construction can be reduced. (2) For areas with good engineering geology, by refining the excavation method of the upper foundation pit and adopting the plan of base reinforcement + drawing construction, the normal operation of the metro tunnel can be guaranteed.

Key words: complex environment, shield tunnel, metro, upper foundation pit, excavation unloading