地铁基坑工程的风险特点及其控制措施

Risk characteristics and control measures of foundation pit engineering for subways

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 open-cut excavation of foundation pits is one of the main components for the subway construction methods. With the development of urban rail transport projects in recent years,the foundation pits have been pxcavated deeper and deeper,the surrounding environment was become more and more complicated,and the construction risk has also grown,Based on many years of investigation,design,construction experience,the risk characteristics for subways were discussed from the risk factors,risk symptoms,risk-prone areas.At the same time,some control measures were also put forward.