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引发基坑工程险情的直接原因是基坑整体失稳(滑坡和隆起)、支撑体系的强度破坏(支撑的偏心挠曲和撑点滑动)。随着社会的进步发展,城市轨道交通建设成为城市经济发展的一个重要方面,也是衡量城市经济发展的一个重要表现。在城市地铁施工中,风险最大的一个阶段是地铁深基坑开挖阶段,如果处理不好会造成重大的财产损失甚至人员伤亡。现主要针对地铁深基坑开挖中的风险类型,及其防范措施进行分析和讨论。
The direct cause of the danger of foundation pit engineering is the complete instability (landslide and uplift) of the foundation pit, the strength destruction of the support system (eccentric flexing of support and sliding of support points). With the development of society, the construction of urban rail transit has become an important aspect of urban economic development and an important measure of urban economic development. In the urban subway construction, one of the most risky phases is the deep excavation of the subway. If it is not handled well, it can cause heavy property damage or even casualties. Now mainly for the type of risk in the excavation of deep foundation pit subway and its preventive measures are analyzed and discussed.