四跨预应力混凝土连续刚构桥的施工控制研究

发布时间：2018-01-06 20:23

本文关键词：四跨预应力混凝土连续刚构桥的施工控制研究　出处：《西南交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着交通事业的迅猛发展,桥梁工程建设的需求越来越大。连续刚构桥凭借着其较强的跨越能力、施工便利、养护简单等优点成为了较为常见的桥型。目前,大跨径预应力混凝土连续刚构桥一般采用悬臂施工法进行施工,在施工过程中由于许许多多因素的影响,很难使桥梁的线形与内力达到设计目标状态。为了使桥梁能够顺利、安全的进行施工,并使最终实际状态能够满足设计要求,有必要对其进行施工控制。本文首先对连续刚构桥施工控制的理论以及结构分析方法进行了概述,以蓬安嘉陵江二桥为背景,通过使用桥梁专业设计软件Midas Civil建立有限元模型对桥梁的各个施工阶段进行模拟分析,得出挠度以及内力的理论数据用以配合施工监控的工作。并对本桥施工控制的具体工作内容进行了详细的介绍,简要地叙述了预拱度的计算方法以及立模标高的优化方法。随后本文对蓬安嘉陵江二桥的施工控制中的部分设计参数进行了敏感性分析,研究了结构自重、混凝土弹性模量、预应力相关参数、混凝土收缩徐变以及温度对桥梁结构挠度、内力以及应力的影响。最后考虑到在用有限元法对顶推力进行计算时,为便于计算,连续刚构桥的仿真模型分析都是忽略了桩基础的影响,于是本文在模型中模拟了桩基础并研究了桩基础对顶推力计算结果的影响,然后对合龙顶推效应进行了研究讨论。
[Abstract]:With the rapid development of transportation, bridge construction demand more and more. The continuous rigid frame bridge by virtue of its strong spanning capacity, convenient construction, simple maintenance advantages have become the common bridge. At present, the large span prestressed concrete continuous rigid frame bridge is generally adopted constructed by cantilever construction method in the construction process, due to the influence of Xu many factors, it is difficult to make the linear and internal force of the bridge meet the design goals. In order to make the bridge to smooth, construction safety, and the final actual state can meet the design requirements, it is necessary to control the construction. This paper provides an overview of the continuous rigid frame bridge construction control theory and structure analysis method. Pengan Jialing River Bridge as the background, through the use of the bridge design software Midas Civil to establish the finite element model of each construction stage of the bridge Simulation analysis and theoretical data of internal force deflection is obtained with the construction monitoring work. And the specific content of the construction control of the bridge are introduced in detail, briefly describes the optimization method of pre arch degree calculation method and the elevation of formwork. Then the design parameters of the construction control of the Pengan Jialing River Bridge in a sensitivity analysis of the weight of the structure, the elastic modulus of concrete, prestress parameter, concrete shrinkage and creep and temperature effect of the bridge structure deflection, internal force and stress. Finally, considering the finite element method is used to calculate the thrust force, for the convenience of calculation, simulation analysis of continuous rigid frame bridge are is to ignore the influence of the pile foundation, so this paper in the model to simulate the pile foundation and the effects of the pile foundation of jacking force calculation results, then the closure jacking effect Research and discussion should be carried out.

【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4;U448.23

【相似文献】