独塔稀索单索面非对称跨钢桁梁斜拉桥施工控制研究
发布时间：2019-06-21 09:19
【摘要】：本文以千厮门嘉陵江大桥为工程依托，研究了复杂施工过程中独塔单索面非对称钢桁梁结构斜拉桥的施工控制理论和方法，对类似工程的设计、施工具有重要的指导意义。 千厮门嘉陵江大桥为一座独塔单索面非对称钢桁梁结构斜拉桥，在施工过程中借助临时斜拉索和临时墩，采用桁架杆件散件悬臂拼装及其合龙施工成桥，，使得施工过程中桥梁主梁线型及其空间形态、索塔位移、索力大小等控制技术、合龙施工控制技术极其复杂。本文在分析了该桥施工控制的重点难点，并对悬臂施工过程控制以及合龙段施工控制等问题进行了研究的基础上，利用结构工程软件Midas/Civil对该桥建立了计算分析模型，对各施工步骤包括临时斜拉索、临时墩的安装与撤除进行了正装计算和倒装计算，得到了各节段的制造线型和杆件安装标高、斜拉索初张索力，拟定了合龙节段各杆件合龙标高；此外还对合龙方案中影响合龙的因素及其敏感性进行了计算分析，为合龙调整制定了实施办法；通过现场实时监测的梁体线型（标高）、索力和索塔位移与相应理论值的对比分析，检验了施工过程中各个施工步骤的计算正确性和适应性，最后给出成桥线型、索力和主梁应力与设计值的对比分析，它们的一致性表明了本文的施工控制方法和计算分析是正确的。
[Abstract]:Based on the project of Qiantangmen Jialing River Bridge, this paper studies the construction control theory and method of asymmetrical steel truss structure cable-stayed bridge with single tower and single cable surface in the complex construction process, which is of great guiding significance for the design and construction of similar projects. Qianshuimen Jialing River Bridge is a single tower single cable plane asymmetrical steel truss structure cable-stayed bridge. With the help of temporary cable-stayed cables and temporary piers, the bridge is constructed with the help of temporary cable-stayed cables and temporary piers, which makes the bridge main beam line type and its spatial shape, cable tower displacement, cable force size and other control technology extremely complex in the construction process. Based on the analysis of the key and difficult points of the construction control of the bridge, and on the basis of studying the cantilever construction process control and the construction control of the closure section, the calculation and analysis model of the bridge is established by using the structural engineering software Midas/Civil. The formal calculation and reverse calculation are carried out for each construction step, including the temporary cable-stayed cable, the installation and removal of the temporary pier, and the manufacturing line and the installation elevation of the members of each segment are obtained. At the beginning of the cable-stayed cable tension, the closure elevation of each member of the closure section is worked out. In addition, the factors affecting the closure and their sensitivity in the closure scheme are calculated and analyzed, and the implementation methods for the closure adjustment are worked out. Through the comparative analysis of beam line type (elevation), cable force and cable tower displacement and corresponding theoretical values monitored in real time, the correctness and adaptability of each construction step in the construction process are tested. Finally, the comparative analysis of bridge line type, cable force and main beam stress and design value is given. Their consistency shows that the construction control method and calculation analysis in this paper are correct.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27;U445
本文编号：2503963
[Abstract]:Based on the project of Qiantangmen Jialing River Bridge, this paper studies the construction control theory and method of asymmetrical steel truss structure cable-stayed bridge with single tower and single cable surface in the complex construction process, which is of great guiding significance for the design and construction of similar projects. Qianshuimen Jialing River Bridge is a single tower single cable plane asymmetrical steel truss structure cable-stayed bridge. With the help of temporary cable-stayed cables and temporary piers, the bridge is constructed with the help of temporary cable-stayed cables and temporary piers, which makes the bridge main beam line type and its spatial shape, cable tower displacement, cable force size and other control technology extremely complex in the construction process. Based on the analysis of the key and difficult points of the construction control of the bridge, and on the basis of studying the cantilever construction process control and the construction control of the closure section, the calculation and analysis model of the bridge is established by using the structural engineering software Midas/Civil. The formal calculation and reverse calculation are carried out for each construction step, including the temporary cable-stayed cable, the installation and removal of the temporary pier, and the manufacturing line and the installation elevation of the members of each segment are obtained. At the beginning of the cable-stayed cable tension, the closure elevation of each member of the closure section is worked out. In addition, the factors affecting the closure and their sensitivity in the closure scheme are calculated and analyzed, and the implementation methods for the closure adjustment are worked out. Through the comparative analysis of beam line type (elevation), cable force and cable tower displacement and corresponding theoretical values monitored in real time, the correctness and adaptability of each construction step in the construction process are tested. Finally, the comparative analysis of bridge line type, cable force and main beam stress and design value is given. Their consistency shows that the construction control method and calculation analysis in this paper are correct.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27;U445
【共引文献】
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