上海交通大学学报

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (01): 36-41.

• 交通运输 • 上一篇    下一篇

地下空间开发与地铁共建中坑中坑的安全稳定性分析

郑俊星，贾坚   

  1. （同济大学 岩土及地下工程教育部重点实验室， 地下建筑与工程系， 上海 200092）
  • 收稿日期:2011-06-12 出版日期:2012-01-30 发布日期:2012-01-30

Stability Evaluation for the Nested Excavations of Co-Construction in Urban Underground Space Developments

 ZHENG  Jun-Xing, JIA  Jian   

  1. (Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China)
  • Received:2011-06-12 Online:2012-01-30 Published:2012-01-30

摘要： 结合上海市自然博物馆地下室与地铁共建坑中坑开挖的工程实践，探讨了坑中坑抗隆起安全稳定性的分析方法，并在单一基坑抗隆起安全稳定性系数计算公式的基础上，提出了坑中坑抗隆起安全稳定性系数的计算公式，同时，经过工程实践加以检验.结果表明，所提出的计算公式能够合理评估坑中坑的抗隆起安全稳定性.

关键词: 地下空间, 共建, 坑中坑, 安全稳定性

Abstract: An approach was presented to assess the basal heave stability of a kind of distinctive excavations——nested excavations which means that a comparatively smallscale excavation must be located in a large-scale one in some special projects. A new formula targeting on calculating the factor of safety against basal heave of nested excavations was developed in this research, grounding on the widely used conventional computing method for the single excavation. The achievement in this paper has been applied in a typical case in which the structure of a metro station of Line 13 lies beneath basement of the Shanghai Natural History Museum and thus they are co-constructed and form the nested excavations. The results demonstrate that the new formula of this paper could reasonably compute the factor of safety against basal heave of the nested excavations.

Key words: underground space, co-construction, nested excavations, stability

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