预应力混凝土梁桥关键施工技术分析与研究

发布时间：2018-08-31 09:50

【摘要】：预应力混凝土梁桥作为交通建设中必不可少的重要组成部分,得到了迅速展。在40-200米跨径范围内,无论是从结构受力特性还是经济性角度考虑,预应力混凝土连续梁桥常常成为较理想的桥型。因此,对预应力混凝土连续梁桥的设计施工关键技术研究也显得尤为重要。本文针对预应力混凝土连续梁桥(1×12.5+5×20m)的设计和施工关键技术进行研究,在目前的施工技术和研究经验的基础上,进一步研究了预应力混凝土连续梁桥上部结构的施工技术及连续梁桥施工技术中的一些问题,并进行计算分析。主要研究工作如下:1、论述了预应力混凝土连续梁桥的国内外发展现状。从必要性和重要性两个角度论述施工控制理论的实际意义。并展现了本论文需要研究的主要内容、预应力混凝土梁桥设计计算理论及分析方法。2、从内容,方法,结构分析以及施工当中的难点关键点研究预应力混凝土连续梁施工控制理论;在众多影响施工控制效果的因素中综合考虑能使桥梁偏离理想状态设计的因素,能更好的指导施工。3、从实际施工角度详细介绍并分析了本工程的特点。主要包括:桥梁概况、主要工程数量、设计采用的技术标准、技术条件、主要材料、箱梁结构设计、施工要点等,并提出施工可能遇见的问题及相应的解决方案。详细介绍了该工程的施工组织设计,包括人员、材料、机械等具体的安排,预制箱梁及空心板的施工工艺及安全质量保证措施。4、根据现有设计规范和经验拟定预应力混凝土连续梁桥设计参数,利用有限元分析软件Midas Civil建立计算模型,计算分析全桥的内力与变形情况,包括悬臂施工阶段时各T构内力和挠度变化情况。最后通过建立有限元分析模型,进行了施工全过程仿真模拟计算分析,研究了预应力混凝土梁桥施工过程中最不利受力情形和整体受力状态。
[Abstract]:As an essential part of traffic construction, prestressed concrete beam bridge has been developed rapidly. In the span range of 40-200 meters, the prestressed concrete continuous beam bridge is often an ideal bridge type, whether from the point of view of the structural mechanical characteristics or the economy. Therefore, it is very important to study the key technology of design and construction of prestressed concrete continuous beam bridge. In this paper, the key technology of design and construction of prestressed concrete continuous beam bridge (1 脳 12.5 5 脳 20 m) is studied. The construction technology of the superstructure of the prestressed concrete continuous beam bridge and some problems in the construction technology of the continuous beam bridge are further studied, and the calculation and analysis are carried out. The main research work is as follows: 1. The development of prestressed concrete continuous beam bridge at home and abroad is discussed. This paper discusses the practical significance of construction control theory from the point of view of necessity and importance. It also shows the main contents of this paper, the design and calculation theory and analysis method of prestressed concrete beam bridge. Study on the Construction Control Theory of Prestressed concrete continuous Beam, considering the factors that can make the bridge deviate from the ideal state design among the many factors that affect the construction control effect. Can better guide the construction. 3, from the point of view of actual construction detailed introduction and analysis of the characteristics of the project. It mainly includes: general situation of bridge, quantity of main project, technical standard, technical condition, main material, structure design of box girder, construction essentials and so on, and puts forward the problems that may be encountered in construction and corresponding solutions. The construction organization design of the project is introduced in detail, including the concrete arrangement of personnel, materials, machinery and so on. The construction technology and safety quality assurance measures of prefabricated box girder and hollow slab. According to the existing design code and experience, the design parameters of prestressed concrete continuous beam bridge are worked out, and the calculation model is established by using the finite element analysis software Midas Civil. The internal force and deformation of the whole bridge are calculated and analyzed, including the changes of each T-structure internal force and deflection in the cantilever construction stage. At last, the finite element analysis model is established, and the simulation and calculation of the whole construction process are carried out, and the most disadvantageous stress situation and the whole stress state in the construction process of prestressed concrete beam bridge are studied.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.4

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