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明挖基坑工程是地铁建设三大施工方法的主要组成之一。近年来,随着城市轨道交通工程的迅猛发展,地铁基坑工程开挖深度愈来愈深,基坑周边环境越来越复杂,其施工风险也越来越大。结合勘察、设计、施工经验,从风险因素、风险征兆、风险易发部位等方面阐述了地铁基坑工程的风险特点,同时分事前、事中、事后提出了控制措施。
The foundation pit excavation project is one of the main components of the three major construction methods for the subway construction. In recent years, along with the rapid development of urban rail transit project, the excavation depth of the foundation pit project is getting deeper and deeper, the surrounding environment of the pit is more and more complex, and the construction risk is also increasing. Combined with the investigation, design and construction experience, this paper expounds the risk characteristics of the foundation pit engineering from the aspects of risk factors, risk signs and risks, and puts forward the control measures before, during, and after the events.