悬臂浇筑预应力混凝土连续梁桥施工监控研究

发布时间：2018-05-26 18:15

本文选题：预应力混凝土 + 连续梁桥　；参考：《吉林大学》2014年硕士论文

【摘要】：预应力混凝土连续梁桥受力特点是跨中截面承受正弯矩，支点截面承受负弯矩，在建设过程中广泛采取悬臂浇筑的施工方法，由于悬臂体系与预应力连续体系梁桥有共同之处。悬臂施工中施工监控是桥梁建设的质量保证，保证已成桥的线形以及受力状态符合设计要求。文章以小清河大桥施工监控实际工程为依托，旨在研究线形控制理论、误差预测方法，结构受力安全性分析，确保施工安全，为该类型实际工程提供数据分析参考。文章首先介绍预应力梁桥的发展概况，施工监控的研究现状及意义；其次，重点阐述施工监控的原理与方法，对施工反馈、预测理论及残差精度进行研究；再次，利用有限元软件对小清河大桥进行施工模拟，分析累计挠度曲线、预拱度设定，进行挂篮试验，从而确定保证成桥合理线形的立模标高。最后，，对线形控制分析，根据灰色理论预测误差，及时调整合理线形；进行弹性模量试验，考虑收缩徐变影响，对应力控制分析，保证桥梁结构安全性。文章分析可为同类型桥梁的施工控制提供参考并推动该类型桥梁建设的发展，相信随着施工监控技术日益成熟，施工监控系统将是桥梁建设的安全保障。
[Abstract]:The stress characteristics of prestressed concrete continuous beam bridge are that the mid-span section bears the positive moment and the fulcrum section bears the negative moment. In the process of construction, the cantilever construction method is widely adopted, because the cantilever system and the prestressed continuous system beam bridge have common points. Construction monitoring in cantilever construction is the quality assurance of bridge construction, which ensures that the alignment and force state of the bridge meet the design requirements. Based on the actual construction monitoring project of Xiaoqing River Bridge, this paper aims to study the linear control theory, error prediction method, structural stress safety analysis, ensure construction safety, and provide data analysis reference for this type of practical project. Firstly, the paper introduces the development of prestressed beam bridge, the research status and significance of construction monitoring. Secondly, it focuses on the principle and method of construction monitoring, research on construction feedback, prediction theory and residual accuracy. The finite element software is used to simulate the construction of Xiaoqing River Bridge. The cumulative deflection curve is analyzed, the pre-camber is set, and the hanging basket test is carried out to determine the elevation of the vertical formwork to ensure the reasonable alignment of the bridge. Finally, the linear control analysis, according to the grey theory prediction error, timely adjustment of the reasonable linear, elastic modulus test, considering the shrinkage and creep, stress control analysis to ensure the safety of the bridge structure. This paper analyzes that it can provide reference for the construction control of the same type of bridge and promote the development of this type of bridge construction. It is believed that the construction monitoring system will be the safety guarantee of the bridge construction with the construction monitoring technology maturing day by day.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4;U448.35

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