T型刚构桥转体施工技术与施工过程控制

发布时间：2018-02-19 17:46

本文关键词： T型刚构桥转体施工施工控制有限元　出处：《重庆大学》2015年硕士论文　论文类型：学位论文

【摘要】：转体施工法是借助动力设备将在非设计位置完成主体浇筑的桥梁转体就位的一种施工方法。刚构桥是近年来比较常见的一种桥梁形式,施工中多采用满堂支架法、悬臂施工法以及转体施工法。本文主要针对转体施工法在T型刚构桥中的运用展开研究,转体施工过程时间短,要求精度高,是整个桥梁建设的重点和难点,因此,对其进行施工控制更为重要。本论文以津保正线跨既有京广铁路T型刚构桥为工程背景,主要研究内容包括以下几个方面:①对转体系统在制作和安装过程中需要考虑的控制因素进行了探讨,运用球铰转动方法进行了称重试验,计算得出了相应的配重方案。通过对转体施工技术的研究,明确了T型刚构桥转体施工技术及控制的要点。②依据桥梁结构有限元分析原理,运用有限元分析软件CSB对该刚构桥进行仿真分析,得出施工过程中每个阶段的理论计算结果,并运用MIDAS/Civil对计算结果进行复核,确保了计算结果的准确性。③针对满堂支架施工方法,给出了该T构桥预拱度的考虑因素和设置方法。依据桥梁施工监控理论及分析原理,对桥梁施工状态参数进行了识别和调整。现场监测得出桥梁各施工阶段的施工状态,将实测结果与理论结果进行对比,及时通过现场措施调整桥梁施工状态,确保桥梁结构的线形和应力状态始终处于控制范围内。④由于球铰在转体施工桥梁中的重要性,本文运用有限元分析软件MIDAS/FEA对其建立实体模型,可以查看局部构件的位移结果和应力结果。同时在球铰下转盘设置应变计,分阶段监测球铰下应力变化,并与理论值进行对比,确保球铰下应力在控制范围内,同时,也保证了上部结构的稳定性。
[Abstract]:Swivel construction method is a kind of construction method with power equipment will be completed in the main position of the bridge design pouring non twist in place. The bridge is a bridge in recent years, the more common form, full framing method used in the construction of the cantilever construction method and swivel construction method in this paper. The swivel construction method used in the T type rigid frame bridge in the study, the rotating construction process of short time, high accuracy, is the key and difficult points, the whole bridge construction so the construction control is more important. In this paper, Tianjin line across the existing Beijing Guangzhou railway T rigid frame bridge as the engineering background, the main research contents include the following aspects: 1. Study on control factors of rotor system need to be considered in the process of manufacturing and installation, the use of a rotating ball hinge weighing test method, the allocation of the corresponding calculation. Through the rotation Study on construction technology, the key points of T type rigid frame bridge Swivel Construction Technology and control. According to the finite element analysis of bridge structure principle, using finite element analysis software CSB to simulate the bridge, the calculation results of each stage of the construction process theory, and the use of MIDAS/Civil to conduct a review of the results, to ensure the accuracy of calculation results. The construction method of full space support, given the T constitutive factors and setting method of bridge arch. According to the principle of control theory and analysis of bridge construction, bridge construction parameters were identified and adjusted. The construction site monitoring state of the bridge in different construction stages, the experimental results and theoretical results by contrast, through on-site adjustment measures of bridge construction time, ensure the linear bridge structure and the stress state is always in control. Because of the spherical hinge The importance of bridge rotation construction in this paper, using the finite element analysis software MIDAS/FEA to build the solid model of the displacement results can view the local members and stress results. At the same time dial strain gauge in ball joint, stress change stage monitoring ball joint, and the theoretical values are compared to ensure the ball hinge the stress in the control range, at the same time, also to ensure the stability of the upper structure.

【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.465;U448.23

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