天津某地铁盾构穿越既有铁路工程变形规律及施工控制研究

发布时间：2018-02-15 14:47

本文关键词： 盾构穿越城际铁路直径线变形规律　出处：《北京交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：摘要：社会的发展使得城市规模越来越大,人口越来越密集,进而造成严重交通拥挤、环境恶化和资源的超前消耗。在解决城市问题的过程中,轨道交通以其运量大、速度快、安全、准点、保护环境、节约能源和用地等特点得到世界各国的认可。高速铁路与普速铁路组成了城市之间的轨道交通体系；地铁和直径线等则组成了城市内部轨道交通的体系。为满足人们出行方便,地铁与铁路无缝化换乘已成为必然。在无缝化换乘中,地铁穿越既有线将难以避免。地铁施工对既有线的安全运营带来了影响。因此,分析地铁盾构穿越对既有线的影响,了解影响特点及变形规律,总结施工中的成功经验,可以为类似工程提供参考依据。本文以某天津新建地铁区间盾构穿越京津城际铁路及地下直径线工程为例,运用数值模拟方法,结合监测数据,分析并总结京津城际客运专线及直径线在盾构穿越下的变形特点；总结施工经验；通过对比分析在不同施工参数及施工方案下既有线的变形特点,给出施工控制建议,为类似工程施工提供参照依据。本文主要开展的研究工作如下： (1)运用ANSYS有限元数值分析软件,建立地层—结构三维实体模型,计算盾构穿越施工对京津城际铁路及地下直径线的影响,给出施工期间的变形控制指标。结合监测数据,研究既有线的变形规律,总结施工经验。 (2)对比分析不同施工方案、不同盾构参数对既有线轨道和结构的影响情况,为工程受条件限制时选择最合理的施工方案提供参考依据,指导类似工程施工。
[Abstract]:Absrtact: with the development of society, the urban scale is becoming larger and larger and the population is more and more dense, thus causing serious traffic congestion, environmental deterioration and advanced consumption of resources. In the process of solving the urban problems, rail transit has a large volume and a fast speed. The characteristics of safety, punctuality, environmental protection, energy conservation and land use are recognized by all over the world. Subway and diameter line constitute the system of urban rail transit. In order to meet the convenience of people, seamless transfer between subway and railway has become inevitable. It is difficult to avoid subway crossing existing lines. Subway construction has an impact on the safe operation of existing lines. Therefore, this paper analyzes the influence of shield tunneling on existing lines, understands the influence characteristics and deformation rules, and summarizes the successful experience in construction. It can provide reference for similar projects. In this paper, taking the shield tunneling project of a newly built subway section in Tianjin as an example, a numerical simulation method is used to combine the monitoring data with the construction of the Beijing-Tianjin Intercity Railway and the underground diameter line. This paper analyzes and summarizes the deformation characteristics of Beijing-Tianjin intercity passenger dedicated line and diameter line under shield tunneling, summarizes the construction experience, compares and analyzes the deformation characteristics of existing lines under different construction parameters and construction schemes, and gives some suggestions for construction control. The main research work of this paper is as follows:. 1) using ANSYS finite element numerical analysis software, the three-dimensional solid model of stratum structure is established, the influence of shield tunneling construction on Beijing-Tianjin inter-city railway and underground diameter line is calculated, and the deformation control index during construction is given, and the monitoring data are combined. The deformation law of existing railway line is studied and construction experience is summarized. 2) the influence of different construction schemes and shield parameters on the track and structure of the existing railway line is comparatively analyzed, which provides a reference basis for selecting the most reasonable construction scheme when the project is restricted by the conditions, and guides the construction of similar projects.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U231.3;U455.43

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