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隧道建设(中英文) ›› 2016, Vol. 36 ›› Issue (7): 844-850.DOI: 10.3973/j.issn.1672-741X.2016.07.012

• 研究与探索 • 上一篇    下一篇

共用地下连续墙深基坑影响下地铁车站与隧道节点变形分析

冉岸绿1, 李明广1, 陈锦剑1,2,*, 王建华1,2   

  1. (1. 上海交通大学土木工程系, 上海 200240; 2. 海洋工程国家重点实验室, 上海 200240)
  • 收稿日期:2015-12-15 修回日期:2016-03-07 出版日期:2016-07-20 发布日期:2016-07-27
  • 作者简介:冉岸绿(1992—),男,贵州铜仁人,2016年毕业于上海交通大学,土木工程专业,硕士,从事岩土工程相关研究工作。Email: rananlv@〖JP〗163.com。 *通讯作者: 陈锦剑,Email: chenjj29@sjtu.edu.cn。
  • 基金资助:

    国家自然科学基金重点项目(41330633); 上海市科学技术委员会科研项目(13231200402)

Deformation Behaviors of Joint between Shield Tunnel and Underground Station Impacted by Connected Deep Foundation Pit

RAN Anlyu1, LI Mingguang1, CHEN Jinjian1, 2, *, WANG Jianhua1, 2   

  1. (1. Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. State Key Laboratory of Ocean Engineering, Shanghai 200240, China)
  • Received:2015-12-15 Revised:2016-03-07 Online:2016-07-20 Published:2016-07-27

摘要:

为了分析深基坑与地铁车站共用地下连续墙影响下车站和隧道连接节点的变形特性,保护地铁线路运营的整体安全,通过现场测试和数值模拟展开研究。根据上海地区深基坑与地铁车站共用地下连续墙工程实例的现场测试数据,分析了开挖施工过程中车站与地铁盾构隧道的竖向位移分布特征,并采用三维数值模型研究了共用地下连续墙深基坑开挖深度、相对位置对车站与隧道节点变形的影响,探讨了车站与隧道节点的曲率半径、相对弯曲的发展变化规律,并判断其安全状态。测试结果与数值分析均表明,车站与隧道节点变形比隧道最大沉降处更加不利;节点的曲率半径随基坑开挖深度的增加而减小,相对弯曲随基坑开挖深度的增加而增加;基坑与车站完全共用地下连续墙或远离隧道时,节点处的曲率半径相对较大。

关键词: 共用地下连续墙, 深基坑, 地铁车站, 盾构隧道, 节点, 曲率半径, 安全性态

Abstract:

Study is made on site testing and numerical simulation, so as to guarantee the safety of the running Metro line and to analyze the deformation behaviors of Metro station and joint between shield tunnel and Metro station under the condition of communal underground diaphragm wall between deep foundation pit and Metro station in Shanghai area. The vertical displacements of Metro station and shield tunnel are analyzed. The influence of excavation depth and relative position of foundation pit on Metro station and joint between shield tunnel and Metro station are analyzed by means of 3D numerical model. The behaviors of curvature radius and relative bending of joint between shield tunnel and Metro station are discussed; and the safety of the joint between shield tunnel and Metro station is estimated. The testing results and numerical simulation results show that: 1) The deformation of joint between shield tunnel and Metro station is serious. 2) The curvature radius of joint between shield tunnel and Metro station decreases with the excavation depth of foundation pit increases; and the relative bending increases with the excavation depth of foundation pit increases. 3) The curvature radius of joint between shield tunnel and Metro station at the total connection section between Metro station and foundation pit is large.

Key words: communal underground diaphragm wall, deep foundation pit, Metro station, shield tunnel, connection point, curvature radius, safety state

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