运营期地铁隧道常见结构病害成因及治理方法研究

发布时间：2018-05-23 21:31

本文选题：地铁隧道 + 结构病害　；参考：《南京大学》2014年硕士论文

【摘要】：地铁运营过程中隧道结构将会不可避免的产生一系列病害情况,影响到地铁运营的经济效益、乘客的舒适度、隧道的安全性和耐久性。本文以南京地铁建成运营的一号线和二号线为例,分析了一些常见病害及治理措施。总的来说隧道病害主要有不均匀沉降、渗漏水、裂缝以及道床隆起等。本文分析了西延线隧道病害现状,在采集分析大量数据的基础上,运用结构力学计算方法对隧道结构进行了安全性验算。介绍了由外部堆载造成的金马区间隧道沉降和管片开裂等病害,详细叙述了其治理措施。金马区间隧道加固是一次大型治理工程,时间紧迫,运营影响很大,技术要求很高,对南京地铁来说是宝贵的工程经验。此次成功实践,为今后地铁隧道结构同类病害的治理提供了重要参考资料。对雨润-元通区间的各种病害进行了监测和原因分析,认为其所处地质环境和外部工程施工是这些病害产生的主要原因,并且介绍了其治理措施。针对多种隧道结构常见病害,考虑了周边环境条件等因素,分析了病害产生原因,总结了治理经验。在此基础上结合自己的工作实践,从安全性角度和工作效率出发,比较了一些隧道加固治理方案,提出了一些合理的建议。在大弯道、下穿河道等曲率半径小的地方,由于支护不便等原因常常导致管片安装质量不高,致使隧道抵御外力能力降低,结构安全性能相对较薄弱。对于这些敏感区段的管片等建议设计时适当加大强度,加大安全余量。对穿越铁道线路、高速公路等地面动载大的隧道结构要重点加强变形监测,争取及时发现问题,及时采取科学合理的治理措施。
[Abstract]:In the course of subway operation, a series of diseases will inevitably occur in the tunnel structure, which will affect the economic benefits of subway operation, the comfort of passengers, the safety and durability of the tunnel. Taking Nanjing Metro Line 1 and Line 2 as examples, this paper analyzes some common diseases and treatment measures. Generally speaking, tunnel diseases mainly include uneven settlement, leakage, cracks and roadbed uplift. In this paper, the present situation of tunnel diseases in the west extension is analyzed. On the basis of collecting and analyzing a large number of data, the structural mechanics calculation method is used to calculate the safety of the tunnel structure. This paper introduces the defects of tunnel settlement and segment cracking caused by external heaps, and describes in detail the treatment measures. The reinforcement of Jinma section tunnel is a large treatment project, which is a precious engineering experience for Nanjing subway, because of its urgent time, great influence on operation and high technical requirements. This successful practice provides an important reference for the treatment of similar diseases of subway tunnel structure in the future. Based on the monitoring and cause analysis of various diseases in Yurun-Yuantong section, it is considered that the geological environment and external engineering construction are the main causes of these diseases, and the treatment measures are also introduced. In view of the common diseases of tunnel structure, considering the surrounding environmental conditions, the causes of the disease are analyzed, and the treatment experience is summarized. On the basis of this, some tunnel reinforcement and treatment schemes are compared from the point of view of safety and working efficiency, and some reasonable suggestions are put forward. Where the curvature radius of the channel is small in the big bend, because of the inconvenient support, the installation quality of the segment is not high, the ability of resisting the external force of the tunnel is reduced, and the safety performance of the structure is relatively weak. It is suggested that the design of these sensitive segments should increase the strength and increase the safety margin. It is necessary to strengthen deformation monitoring for tunnel structures with large ground dynamic loads such as railway lines and expressways so as to find problems in time and take scientific and reasonable treatment measures in time.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U231.3;U457.2

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