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明挖地铁车站围护结构内支撑力学参数研究

张明聚, 李云刚, 李方, 王成

张明聚, 李云刚, 李方, 王成. 明挖地铁车站围护结构内支撑力学参数研究[J]. 北京工业大学学报, 2014, 40(10): 1512-1517.
引用本文: 张明聚, 李云刚, 李方, 王成. 明挖地铁车站围护结构内支撑力学参数研究[J]. 北京工业大学学报, 2014, 40(10): 1512-1517.
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ZHANG Ming-ju, LI Yun-gang, LI Fang, WANG Cheng. Inner Support Mechanical Parameters Study of Open-cut Subway Station Supporting Structure[J]. Journal of Beijing University of Technology, 2014, 40(10): 1512-1517.
Citation: ZHANG Ming-ju, LI Yun-gang, LI Fang, WANG Cheng. Inner Support Mechanical Parameters Study of Open-cut Subway Station Supporting Structure[J]. Journal of Beijing University of Technology, 2014, 40(10): 1512-1517.
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明挖地铁车站围护结构内支撑力学参数研究

  • 北京工业大学城市与工程安全减灾省部共建教育部重点实验室, 100124 北京

基金项目: 

城市与工程安全减灾教育部重点实验室重点项目 (ZD201304)

详细信息
    作者简介:

    张明聚 (1962—) , 男, 教授, 主要从事岩土工程、隧道及地下工程方面的研究, E-mail:zhangmj@bjut.edu.cn

  • 中图分类号: TU94+1

Inner Support Mechanical Parameters Study of Open-cut Subway Station Supporting Structure

  • The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education Beijing University of Technology, Beijing 100124, China

摘要

    摘要
  • 摘要: 以北京某地铁车站深基坑工程为研究对象, 结合现场监测数据, 分析基坑开挖过程中围护结构的水平位移随开挖深度和时间的变化规律, 同时, 运用FLAC3D进行有限差分法数值模拟, 对比分析围护结构水平位移的监测值与模拟值, 并对钢支撑在不同预加轴力及刚度作用下的桩体水平位移及弯矩进行量化分析.主要结论有:1) 实测值和模拟值的桩体水平位移曲线变化趋势大体相似, 都表现出两头小、中间大的括弧状, 最大变形都发生在基坑侧壁中部上下;2) 预加轴力的大小对桩体位移变化有一定影响, 因此在基坑施工中应合理地选择钢支撑的预加轴力来限制围护结构变形;3) 在基坑施工中, 对变形要求严格的工程, 可通过加大钢支撑的刚度来减小桩体的水平位移.
    Abstract: Through the combined monitoring and analysis of construction site data of a subway station deep foundation pit project in Beijing, the horizontal displacement of the retaining structure in relation to the depth and time of construction was studied. At the same time, a comparative analysis of calculation and monitoring results of the retaining structure was carried out using FLAC3D finite element simulation. A quantitative analysis on the effects of the steel support under different pre-axial force and stiffness on the horizontal displacement and bending moment of the pile was conducted. The conclusions are as follows;1) pile measured and simulated values of the horizontal displacement curve trend are generally similar, exhibiting bracket shapes big in the middle and small at both ends, with maximum deformation occuring around the mid-depth of the pit at the right side; 2) pre-axial force has significant influence on the displacement of the pile, therefore, the pre-applied force of steel support should be reasonably chosen to limit deformation of retaining structure in the construction of foundation pit; 3) during excavation of deep foundation pit, pile top horizontal displacement can be reduced by increasing the rigidity of the steel support, in cases where requirement for deformation are high.
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    • 参考文献(9)
  • [1] 丁勇春, 戴斌, 王建华, 等.某邻近地铁隧道深基坑施工监测分析[J].北京工业大学学报, 2008, 34 (5) :492-497.DING Yong-chun, DAI Bin, WANG Jian-hua, et al.Field observation of a deep excavation adjacent to subway tunnels[J].Journal of Beijing University of Technology, 2008, 34 (5) :492-497. (in Chinese)
    [2] 郑刚, 颜志雄, 雷华阳, 等.基坑开挖对临近桩基影响的实测及有限元数值模拟分析[J].岩土工程学报, 2007, 29 (5) :638-643.ZHENG Gang, YAN Zhi-xiong, LEI Hua-yang, et al.Field observation and finite element numerical simulation analysis of effect on adjacent piles due to excavation[J].Chinese Journal of Geotechnical Engineering, 2007, 29 (5) :638-643. (in Chinese)
    [3] 张明聚, 由海亮, 杜修力, 等.北京地铁某车站明挖基坑施工监测分析[J].北京工业大学学报, 2006, 32 (10) :874-878.ZHANG Ming-ju, YOU Hai-liang, DU Xiu-li, et al.Construction monitoring analysis for an open excavated foundation-pit of a subway station in Beijing[J].Journal of Beijing University of Technology, 2006, 32 (10) :874-878. (in Chinese)
    [4] 张明聚, 司峰军, 叶新丰, 等.深基坑围护混合支撑体系内力与变形监测分析[J].北京工业大学学报, 2010, 36 (11) :1496-1503.ZHANG Ming-ju, SI Feng-jun, YE Xin-feng, et al.Internal force and deformation monitoring analysis on mixed-supporting system for supporting structure of some deep foundation pit[J].Journal of Beijing University of Technology, 2010, 36 (11) :1496-1503. (in Chinese)
    [5] 姜忻良, 宗金辉, 孙良涛.天津某深基坑工程施工监测及数值模拟分析[J].土木工程学报, 2007, 40 (2) :79-84.JIANG Xin-liang, ZONG Jin-hui, SUN Liang-tao.Construction monitoring and numerical simulation for some deep excavation in Tianjin[J].China Civil Engineering Journal, 2007, 40 (2) :79-84. (in Chinese)
    [6] 江刚.深基坑施工过程的三维数值分析[J].贵州工业大学学报:自然科学版, 2008, 37 (1) :109-111.JIANG Gang.Three-dimensional numerical analysis of deep foundation pit excavation[J].Journal of Guizhou University of Technology:Natural Science Edition, 2008, 37 (1) :109-111. (in Chinese)
    [7] 张新东, 姚爱军.某深基坑围护桩结构性态监测与数值模拟研究[J].地下空间与工程学报, 2011, 7 (6) :1139-1142.ZHANG Xin-dong, YAO Ai-jun.Monitoring and numerical simulation of structure behaviour of supporting a deep piles in foundation pit[J].Chinese Journal of Underground Space and Engineering, 2011, 7 (6) :1139-1142. (in Chinese)
    [8] 胡仲春, 任高峰, 胡逢春.基于有限元数值模拟的基坑联合支护系统分析[J].地下空间与工程学报, 2011, 7 (增刊2) :1648-1652.HU Zhong-chun, REN Gao-feng, HU Feng-chun.Analysis of excavation combined support system based on finite element numerical siulation[J].Chinese Journal of Underground Space and Engineering, 2011, 7 (Suppl 2) :1648-1652. (in Chinese)
    [9] 张钦喜, 韩银山, 张明聚.明挖车站深基坑支护结构受力变形分析[J].岩土工程技术, 2010, 24 (3) :151-154.ZHANG Qin-xi, HAN Yin-shan, ZHANG Ming-ju.Research and analysis of axial force and deformation in retaining structures of deep foundation engineering[J].Geotechnical Engineering Technique, 2010, 24 (3) :151-154. (in Chinese)
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出版历程
  • 收稿日期:  2013-10-16
  • 网络出版日期:  2023-01-10

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