盾构隧道连续性倒塌特征分析  

Characteristics Analysis on Progressive Collapse of Shield Tunnel

作　　者：柳献[1] 孙齐昊 LIU Xian;SUN Qihao(Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《隧道建设（中英文）》2021年第6期913-922,共10页Tunnel Construction

基　　金：国家自然科学基金资助项目(52078376)。

摘　　要：为解决对盾构隧道连续倒塌的力学原理和破坏特征认识不足的问题,通过单个案例分析、事故树分析和事件树分析3种方法对盾构隧道在出现连续性倒塌时的特征进行分析。对国内外5起重大盾构隧道倒塌事故案例进行分析,结果表明:盾构隧道结构破坏过程中具有明显的非比例性和连续性特征,具有连续性倒塌的本质。通过多起典型倒塌事故案例的事故树分析表明:盾构隧道连续性倒塌往往是位于特定地层条件下的衬砌结构发生渗漏水的结果。最后,通过事件树分析法,将盾构隧道连续倒塌的过程分为四级事件,对隧道结构倒塌过程中水土流失与结构相互作用的机制进行讨论。The mechanical principle and failure characteristics of progressive collapse of the shield tunnel are important.Thus,three methods of single-case analysis,fault tree analysis(FTA),and event tree analysis(ETA)are used to analyze the characteristics of progressive collapse of shield tunnel.The analysis of five major shield tunnel collapse cases in China and abroad show that the failure process of shield tunnel structure has obvious non-proportionality and continuity characteristics,with the nature of the progressive collapse.The FTA results of cases show that the progressive collapse of the shield tunnel is usually due to the leakage of lining structure under specific stratum conditions.Finally,the process of shield tunnel collapse is divided into four events by ETA,and the interaction mechanism between soil erosion and structure in the collapse process of tunnel structure is discussed.

关 键 词：盾构隧道 连续性倒塌 案例分析 事故树分析法 事件树分析法 

分 类 号：U45[建筑科学—桥梁与隧道工程]