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地铁隧道下穿历史风貌建筑影响的实测与分析

徐泽民, 韩庆华, 郑刚, 张立明

徐泽民, 韩庆华, 郑刚, 张立明. 地铁隧道下穿历史风貌建筑影响的实测与分析[J]. 岩土工程学报, 2013, 35(2): 364-374.
引用本文: 徐泽民, 韩庆华, 郑刚, 张立明. 地铁隧道下穿历史风貌建筑影响的实测与分析[J]. 岩土工程学报, 2013, 35(2): 364-374.
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XU Ze-min, HAN Qing-hua, ZHENG Gang, ZHANG Li-ming. Field monitoring and analysis of effects of metro tunnels under historic buildings[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(2): 364-374.
Citation: XU Ze-min, HAN Qing-hua, ZHENG Gang, ZHANG Li-ming. Field monitoring and analysis of effects of metro tunnels under historic buildings[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(2): 364-374.
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地铁隧道下穿历史风貌建筑影响的实测与分析  English Version

  • 1. 天津大学建筑工程学院，天津 300072; 2. 天津市地下铁道集团有限公司，天津 300051

基金项目: 国家重点基础研究发展计划（973计划）项目（2010CB732106）；住房与城乡建设部研究开发项目（2012-k5-14）；天津市建交委科学技术计划项目（2010-6）
详细信息
    作者简介:

    徐泽民(1980– )，男，博士，主要从事隧道及地下工程等方面的研究工作。E-mail: tianjinmetro1@163.com

Field monitoring and analysis of effects of metro tunnels under historic buildings

  • 1. School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2. Tianjin Metro Group Co., Ltd., Tianjin 300051, China

摘要

    摘要
  • 摘要: 两座历史风貌建筑物紧邻地铁车站，并且盾构在其下方穿越，需对建筑物的变形进行严格控制。对建筑物的保护，针对性提出地面袖阀管注浆加固、车站基坑盖挖逆作法、地连墙截断承压水、冻结、车站内水平注浆加固、优化盾构机掘进参数等施工方案及措施。通过对基坑开挖与降水、端头加固、盾构掘进等阶段的监测数据进行分析，研究了不同施工阶段对建筑物变形影响的规律及特点，实测结果表明：合理的盾构掘进参数能够将建筑物的沉降控制在较小范围内；冻结孔施工、地下水通过冻结区盾尾间隙进入刀盘前方等均可引起建筑物的显著沉降；建筑物基础与隧道之间存在淤泥质土层时，在淤泥质土层下方进行注浆不能对自重较大的建筑物进行有效抬升，但对自重较小建筑物的抬升则有一定的效果，但注浆在淤泥质土层中引起孔压的消散可导致建筑物在后期产生沉降；盾构机进入冻结体前应做好全断面注浆止水，切断前后水力联系，盾构机掘进困难时，不应随意增大盾构推力。
    Abstract: Two historic buildings are subjected to the impact of nearby excavation and underlying tunneling, which has to be strictly controlled. Countermeasures include ground sleeve valve pipe grouting, top-down method of metro station excavation, diaphragm cut-off wall of confined water, freezing method outside the end well, and optimized parameters of shield tunneling. The settlements of the historic buildings induced by underlying tunneling, dewatering and excavation of nearby underground metro station , freezing and grouting outside end well are measured and analyzed. The field measured data show that the settlements of buildings can be minimized by applying the optimized shield tunneling parameters. Leakage during the construction of horizontal freezing hole and tunneling may cause significant settlement of overlying buildings. The building with large weight can hardly be lifted by grouting when there is soft clayey soil layer between building foundation and grouting. While the building with small weight can be lifted under such conditions. However, the rise of the building can be part offset by the consolidation of soft clayey soil due to the dissipation of the excessive pore water pressure generated during grouting. Freezing zone is vital to leakage prevention during tunneling in the freezing zone before the shield enters the end well. The effect must be evaluated, especially before the large jack force is adopted to advance the shield.
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    • 参考文献(12)
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出版历程
  • 收稿日期:  2012-05-02
  • 发布日期:  2013-03-06

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