西宝客运专线大跨度梁—拱组合桥梁施工监测与控制

发布时间：2018-03-05 04:20

本文选题：客运专线　切入点：梁-拱组合桥　出处：《兰州交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：连续梁-拱组合桥梁具有刚度大、造型美、跨越能力强的特点,因此是大跨铁路桥梁的理想桥型,目前该桥型已经在客运专线和城际快速轨道交通工程当中被越来越多的采用。连续梁-拱组合桥梁是连续梁桥与拱桥的结合,它不仅具备了连续梁桥和拱桥两者的优点,而且在结构受力和使用性能等方面具有一定的优越性。虽然大跨度连续梁-拱组合桥梁在我国已有几个成功的实例,但在结构力学性能、施工监控技术的研究上还是相对比较薄弱。本文主要完成了以下工作。(1)阐述了梁拱组合桥的发展及应用,介绍了梁拱组合桥的施工方法和结构特点,并分析了连续梁拱桥施工控制的研究现状。(2)以西宝客运专线跨西宝高速公路预应力混凝土连续梁-拱组合桥为例,利用有限元计算软件Midas/Civil2010建模,对桥梁在施工过程中的内力和变形进行详细的分析,对桥梁的各施工阶段进行了计算,得到了主梁、主拱、吊杆在各施工阶段的应力和应变的理论值,给出了施工预拱度。(3)通过分析施工控制的内容及其影响因素,结合本桥的特点,决定在西宝客运专线跨西宝高速公路预应力混凝土连续梁-拱组合桥中采用自适应控制法,建立了施工控制体系,介绍了施工阶段误差调整的方法。(4)通过现场的实际测量,得到了西宝客运专线跨西宝高速公路预应力混凝土连续梁-拱组合桥的在各施工阶段及成桥后的数据,经过实测值与理论值的对比,桥梁的各阶段实际状态与理论状态基本一致,竣工后桥梁结构的线形符合设计线形要求,结构的变形和内力在设计规定的误差范围之内,实现大桥精确合龙,达到了施工监控的目标和目的,取得了良好的施工监控效果。
[Abstract]:Continuous beam-arch composite bridge is the ideal bridge type for long span railway bridge because of its high stiffness, beautiful shape and strong span ability. At present, the bridge type has been used more and more in passenger dedicated lines and inter-city rapid rail transit projects. Continuous beam-arch composite bridge is a combination of continuous beam bridge and arch bridge, which not only has the advantages of continuous beam bridge and arch bridge, but also has the advantages of continuous beam bridge and arch bridge. Although there have been several successful examples of long-span continuous beam-arch composite bridges in our country, but in structural mechanical properties, The research of construction monitoring technology is still relatively weak. This paper mainly completed the following work. 1) elaborated the development and application of beam-arch composite bridge, introduced the construction method and structural characteristics of beam-arch composite bridge. The research status of construction control of continuous beam arch bridge is analyzed. (2) taking Xibao passenger dedicated line span prestressed concrete continuous beam-arch composite bridge as an example, the finite element calculation software Midas/Civil2010 is used to model the model. The internal force and deformation of the bridge in the construction process are analyzed in detail, and the theoretical values of the stress and strain of the main beam, the main arch and the suspender in each construction stage are obtained by calculating the construction stages of the bridge. By analyzing the content of construction control and its influencing factors, combining the characteristics of this bridge, it is decided to adopt adaptive control method in the prestressed concrete continuous beam-arch composite bridge of Xibao passenger dedicated line span highway of Xibao Expressway. The construction control system is established, and the method of error adjustment in construction stage is introduced. The data of the prestressed concrete continuous beam-arch composite bridge of Xibao passenger dedicated line span Xibao expressway in each construction stage and after the completion of the bridge are obtained, and the comparison between the measured value and the theoretical value is made. The actual state of each stage of the bridge is basically consistent with the theoretical state. After completion, the alignment of the bridge structure meets the requirements of the design alignment, and the deformation and internal force of the structure are within the range of errors specified in the design to realize the precise closure of the bridge. The goal and purpose of construction monitoring have been achieved, and good construction monitoring effect has been achieved.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

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