预应力混凝土连续梁悬臂施工与监控技术研究

发布时间：2018-04-22 15:05

本文选题：连续梁桥 + 悬臂施工　；参考：《华东交通大学》2014年硕士论文

【摘要】：随着我国交通事业的大力发展，桥梁作为重要的交通枢纽工程，需要大量的建设，预应力混凝土连续梁桥以其显著的优势，在桥梁施工建设中，得到广泛的应用。近几年来，在众多的桥梁施工方法中，悬臂施工方法凭借施工成本低、有利于通航等优点，，成为预应力混凝土连续梁桥施工中的首选方案。随着桥梁跨径的不断增大，对施工的要求也越来越高，因此，探究悬臂施工方法可以有效地指导现场施工。同时，为保证施工过程质量安全以及成桥符合设计要求，对施工全过程进行监控就显得至关重要。本文在参阅了大量有关悬臂施工以及施工控制资料的基础上，结合上甘店大桥悬臂施工工程项目，对预应力混凝土连续梁桥悬臂施工及监控技术进行研究。主要研究的内容有以下3个方面： 1、介绍了预应力混凝土连续梁桥悬臂浇注施工特点和施工工艺，详细叙述了悬臂浇注施工过程中挂篮施工、预应力束张拉和合拢段施工及体系转换等关键技术，并结合工程实例，进行详细的分析论证，确实施工方案。 2、阐述了施工监控的内容和方法，以及施工误差分析与调整，确定上甘店大桥监控方案。分析处理立模标高影响因素，对设计参数进行了识别和修正。 3、分析灰色系统理论在连续梁桥悬臂施工监控中的应用。在主梁线形监控过程中运用灰色系统理论错误！未找到引用源。模型预测节段立模标高，将施工监控的结果进行分析对比，得出结论表明线形符合规范，应力符合设计要求。
[Abstract]:With the development of transportation in our country, bridge, as an important transportation hub project, needs a lot of construction. Prestressed concrete continuous beam bridge has been widely used in bridge construction with its remarkable advantages. In recent years, among the many bridge construction methods, the cantilever construction method has become the first choice in the construction of prestressed concrete continuous beam bridge with the advantages of low construction cost and favorable navigation. With the increasing span of the bridge, the construction requirements are higher and higher. Therefore, exploring the cantilever construction method can effectively guide the field construction. At the same time, in order to ensure the quality and safety of the construction process and to meet the design requirements, it is very important to monitor the whole construction process. On the basis of consulting a lot of information about cantilever construction and construction control, combined with the cantilever construction project of Shanggandian Bridge, this paper studies the cantilever construction and monitoring technology of prestressed concrete continuous beam bridge. The main contents of the study are as follows: 1. The construction characteristics and construction technology of cantilever pouring of prestressed concrete continuous beam bridge are introduced, and the key technologies, such as hanging basket construction, construction of prestressing tensioning and closing section and system transformation, are described in detail. And combined with engineering examples, detailed analysis and demonstration, the construction scheme. 2. The contents and methods of construction monitoring are expounded, and the construction error is analyzed and adjusted, and the monitoring scheme of Shanggandian Bridge is determined. The influencing factors of vertical die elevation are analyzed and the design parameters are identified and corrected. 3. The application of grey system theory in cantilever construction monitoring of continuous beam bridge is analyzed. In the main beam linear monitoring process the use of grey system theory error! No reference source was found. The model is used to predict the elevation of the section and the results of construction monitoring are analyzed and compared. It is concluded that the linear shape is in line with the specification and the stress is in line with the design requirements.
【学位授予单位】：华东交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4

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