土工基础

›› 2015, Vol. 29 ›› Issue (3): 48-52.

• 工程实录 • 上一篇    下一篇

地铁保护区内深基坑支护设计研究

刘 动1,2   

  1. （1.深圳市岩土综合勘察设计有限公司, 广东深圳 518172；2.深圳市龙岗地质勘查局, 广东深圳 518172）
  • 收稿日期:2015-02-24 出版日期:2015-06-20 发布日期:2015-06-26
  • 作者简介:刘 动（1986-），男，博士，工程师，研究方向为岩土工程。

Support Design of Deep Excavation in the Metro Protective Zone

LIU Dong1, 2   

  1. (1.Shenzhen Integrated Geological Exploration & Design Co. Ltd, Shenzhen 518172；
    2.Shenzhen Longgang Geological Survey Bureau, Shenzhen 518172)
  • Received:2015-02-24 Online:2015-06-20 Published:2015-06-26

摘要： 地铁保护区内的深基坑工程必须采取稳妥的支护方案来保证基坑和地铁结构的安全。以深圳地铁保护区内某深基坑支护工程为例，分析了此基坑支护工程的难点和要点，并提出了应对措施，在此基础上提出了深基坑工程的支护方案，详细介绍了此方案的选型和优势，并采用有限元软件对此基坑工程的开挖过程进行了数值模拟。数值分析的结果表明，采用此支护方案，地铁出入口结构变形满足规定要求，工程施工过程中地铁结构安全稳定。

关键词: 地铁保护区, 深基坑, 支护设计方案, 数值模拟

Abstract: The deep excavation activities in the metro protective zone demand a safe excavation support design and construction in order to maintain the safe operation of the metro system. This paper presents a case history of the deep excavation in the metro protective zone in Shenzhen. The potential main and difficult aspects of the construction of supporting system and their mitigation measures are evaluated in the paper. The proposed supporting system is recommended and the selection process are also discussed. Numerical analyses on the construction progress using the selected supporting system are performed. The results indicate that the deformation at both the entrance and exit of the tunnel are met the requirements.

Key words: Metro Protective Zone, Deep Excavation, Supporting System Design, Numerical Analysis