Vulnerability.

In recent years, China ‘s major cities set off a climax of subway construction, but also brought an endless stream of safety accidents. In order to analyze the impact of the evolution process of urban subway construction collapse disaster on residents ‘ life and social economy, by collecting typical cases of subway construction collapse disaster, combined with disaster chain and complex network theory, the network model of subway construction collapse disaster chain is constructed, and the key node events and key propagation paths are analyzed. Based on this, targeted chain-breaking disaster reduction measures are proposed. The results show: the collapse disaster chain of urban subway construction can be divided into early, middle and late stages of disaster evolution. Through the destruction of collapse, underground pipeline rupture, road damage, affecting the lives of residents and building damage and other key nodes or cut off the collapse →  underground pipeline rupture, road damage →  traffic paralysis, collapse →  building damage, construction technology is not standardized →  collapse, construction equipment failure →  collapse and other key effects are significant. The relevant research results can provide a knowledge map for effectively coping with the collapse disaster chain of urban subway construction, identify key nodes and propagation paths, and establish strategies for emergency response and chain-breaking disaster reduction.

近年来，我国各大城市掀起地铁建设热潮，与此同时也衍生出层出不穷的安全事故。为探析城市地铁施工坍塌灾害演化过程对居民生活及社会经济造成的影响，本研究通过收集地铁施工坍塌灾害典型案例，结合灾害链与复杂网络理论，构建了地铁施工坍塌灾害链网络模型，并对关键节点事件与关键传播路径展开分析。在此基础上，本研究提出针对性的断链减灾措施。研究结果表明：城市地铁施工坍塌灾害链可划分为灾害演化的早期、中期与晚期三个阶段。其中，坍塌破坏、地下管线破裂、道路损毁、影响居民生活、建筑受损等均为关键节点；而坍塌→地下管线破裂、道路损毁→交通瘫痪，坍塌→建筑受损，施工工艺不规范→坍塌，施工设备故障→坍塌等关键传播路径的影响效应显著。本研究相关成果可为有效应对城市地铁施工坍塌灾害链、识别关键节点与传播路径、制定应急响应与断链减灾策略提供知识图谱支撑。