矿山法与盾构组合施工地铁隧道管片的受力及变形研究

发布时间：2018-01-05 17:23

本文关键词：矿山法与盾构组合施工地铁隧道管片的受力及变形研究　出处：《武汉工程大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来,我国经济与现代化建设快速发展,城市轨道交通的发展步伐也不断加快,且城市轨道交通在很多城市的建设中被重视,并纳入城市规划和建设中。伴随我国城市轨道交通隧道的工程建设步伐不断加快,由于地铁隧道的施工地质条件也越来越复杂,所以施工中常常需要对两种施工工法进行组合使用,才能更好地解决施工中会遇到的各种困难,比如,可以额解决硬岩段的掘进困难,同时在软岩段施工的风险大大降低。盾构机的拆卸、吊出以及再始发等工作不需要在硬岩段中设置,大大降低了施工场地的局限性,大大方便施工组织。但是两种工法的结合也会随之出现一些问题,如管片纵向压紧力不足,出现渗漏水,管片错台;管片会在回填后产生上浮,降低盾构机姿态控制发生的性能等问题。为解决盾构通过矿山法施工带来的问题,本文以武汉地铁三号线由王家湾到宗关的区间段为背景,通过ANSYS有限元的计算软件,对管片在盾构机空推矿山后形成的隧道进行模拟分析,分析管片纵向应力的变化规律以及管片竖向受力情况。并且结合理论计算,运用数学与力学知识分析管片上浮及错台规律。通过理论计算与有限元软件的模拟分析,得到了管片在盾构通过矿上法隧道中的纵向应力与据盾尾距离的变化规律,同时得出管片竖向受力与上浮关系以及管片上浮与错台据盾尾距离的关系。将理论计算结果与有限元软件得到的结果比较,相互验证提高研究结果的可信度。本文得到的结论对盾构通过矿上法隧道施工具有一定指导意义。
[Abstract]:In recent years, with the rapid development of economy and modernization in China, the development of urban rail transit has been accelerated, and urban rail transit has been attached importance to in the construction of many cities. And into urban planning and construction. With the rapid pace of construction of urban rail transit tunnels in China, the construction geological conditions of subway tunnels are becoming more and more complex. Therefore, it is often necessary to combine the two construction methods in order to better solve the difficulties encountered in construction, for example, can solve the hard rock excavation difficulties. At the same time, the risk of construction in soft rock segment is greatly reduced. The disassembly, lifting and re-starting of shield machine do not need to be set in the hard rock section, which greatly reduces the limitation of construction site. But the combination of the two methods will lead to some problems, such as insufficient longitudinal compression force, leakage water, staggered pipe; The segment will rise after backfilling and reduce the performance of shield machine attitude control. In order to solve the problems caused by shield tunneling through mine construction. Based on the section of Wuhan Metro Line 3 from Wangjiawan to Zongguan, this paper simulates and analyzes the tunnel formed after the shield machine pushes the mine through ANSYS finite element calculation software. The variation law of longitudinal stress of segment and the vertical force of segment are analyzed, and the theoretical calculation is carried out. Mathematical and mechanical knowledge is used to analyze the rule of segment floating and stagger. Theoretical calculation and finite element software simulation analysis are carried out. The variation law of longitudinal stress and shield tail distance in shield tunneling is obtained. At the same time, the relationship between vertical force and floating and the distance between segment floating and staggered shield tail are obtained. The theoretical results are compared with the results obtained by finite element software. Mutual verification improves the reliability of the research results. The conclusions obtained in this paper have a certain guiding significance for shield tunneling construction.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.4;U231.3

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