Deformation of Shenzhen subway aroused by deep excavations andits risk control technology
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摘要: 地铁是城市重要基础设施，周边基坑工程必须采取措施保护地铁，并按照地下工程特点控制工程风险。本文通过工程实例和监测数据分析与地铁不同位置关系的基坑工程对深圳地铁结构的变形影响。结合地区特点和经验，提出地铁附近基坑施工引起地铁变形的风险控制技术，风险控制技术包括采用有安全冗余的地铁结构变形控制标准、按照基坑可能影响地铁结构安全的危害程度将基坑分级并有区别管理、监控量测和过程监管、事后评估等方面。实践显示所有基坑未对地铁运营造成影响。Abstract: Because the subway is the most important infastructure in a city, effective design and construction measures of neerby deep excavations must be adopted to protect it. The rules of deformation aroused by deep excavations near the subway are gained according to case studies and practical deformation data. Based on the regional experience, the risk control technologies for deep excavations include deformation control standards of subway structure with proper safety redundancy, risk classification of deep excavations according to the possible influence level on subway, defferent technical demands according to the classification, survey technology, supervision during the construction process and the back-evaluation after the completion of excavation. The results indicate that all the nearby excavations do not disturbe the normal operation of subway.
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Keywords:
- excavation /
- subway protection /
- deformation /
- control
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