运营隧道结构健康安全评价

发布时间：2019-03-26 20:25

【摘要】：城市地铁隧道的一般位于地底,随着地铁的运营和周边环境的影响,隧道结构会受到损伤其使用功能也将逐渐衰退,隧道由于结构的原因而发生的安全性事故越来越多。因此,明确影响结构健康安全的关键因素,综合评价运营隧道结构健康安全,从而为地铁隧道的安全运营与管理提供决策支持,具有重要的理论意义和工程应用价值。论文基于隧道运营过程中结构安全风险的相关文献,结合现有工程实践经验,从外荷载作用、隧道结构应力变形、材质劣化和渗漏水平四个方面识别影响运营隧道结构健康安全的主要因素。通过构建运营隧道结构健康安全评价体系,将各影响因素的划分归类,挖掘出关键因素,最后确立了19个评价指标及其融合权重。与此同时,运用光纤传感技术获取这19个指标的监测数据,并采用蒙特卡洛方法综合评价运营隧道结构健康安全状况。以武汉市已经开通运营的四条地铁隧道为例,运用蒙特卡洛方法评估出这些工程中结构健康安全的等级,并运用敏感性分析得出关键影响因素,在此基础上提出对应的安全维护措施,为地铁隧道的运营与管理提供了新的思路。
[Abstract]:Urban subway tunnel is usually located under the ground. With the operation of subway and the influence of surrounding environment, the tunnel structure will be damaged and its service function will gradually decline, and more safety accidents will occur because of the structure of the tunnel. Therefore, it is of great theoretical significance and engineering application value to make clear the key factors that affect the structural health and safety, and to evaluate the structural health and safety of the tunnel comprehensively, so as to provide the decision support for the safe operation and management of the subway tunnel. Based on the relevant literature on structural safety risk in tunnel operation, combined with existing engineering experience, this paper analyzes the stress and deformation of tunnel structure under external load. Material deterioration and leakage level identify the main factors affecting the health and safety of the tunnel structure. By constructing the health and safety evaluation system of the operation tunnel structure, the influence factors are classified and the key factors are excavated. At last, 19 evaluation indexes and their fusion weights are established. At the same time, the monitoring data of these 19 indexes are obtained by using optical fiber sensing technology, and the health and safety status of the tunnel structure is evaluated comprehensively by Monte Carlo method. Taking the four subway tunnels that have been opened and operated in Wuhan as an example, the grade of structural health and safety in these projects is evaluated by Monte Carlo method, and the key influencing factors are obtained by sensitivity analysis. On this basis, the corresponding safety maintenance measures are put forward, which provides a new train of thought for the operation and management of subway tunnel.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U456.3;U231

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