连续刚构桥施工监控分析研究

发布时间：2018-06-04 05:30

本文选题：连续刚构桥 + 施工监控　；参考：《重庆交通大学》2015年硕士论文

【摘要】：近年来,随着我国综合国力的提高和交通事业的迅速发展,相继修建了许多预应力混凝土连续刚构桥,由于施工难度的增大,许多不容忽视的问题在施工过程中也相继出现,其中在施工监控过程中挠度及应力的问题表现尤为突出。对预应力混凝土连续刚构桥梁施工过程控制,是确保施工质量和安全的重要环节,是确保成桥线形和应力状态符合设计要求的重要措施。悬臂浇筑挂篮施工的连续刚构桥,施工监控主要依据结构的挠度、应力、温度等内容进行实时观测和修正模型的结构参数,进行预测下一施工节段的挠度变形与结构应力,从而达到最终设计状态、保证桥梁结构的成桥线形及应力满足设计要求。本文结合AK4+240预应力混凝土连续刚构桥,对其进行施工监控中的应力进行研究,主要内容和结果如下:1、对连续刚构桥的特点与施工进行分析,并总结了国内外桥梁施工监控技术的发展现状,指出桥梁施工监控的重要性及必要性。2、从施工监控的目的、方法、原则等方面对施工监控理论进行概述,并对施工监控的控制原理及关键问题进行分析3、以AK4+240特大桥项目为背景,建立施工监控系统,运用桥梁博士软件对桥梁的施工过程进行模拟分析,计算大桥在施工过程中和成桥运营中的内力和应力。4、结合验算结构,对大桥的施工过程实时监控,确保施工质量和安全,保障应力、线形满足要求。
[Abstract]:In recent years, with the improvement of our country's comprehensive national strength and the rapid development of transportation, many prestressed concrete continuous rigid frame bridges have been built one after another. Due to the increase of construction difficulty, many problems that can not be ignored appear in the construction process. The problems of deflection and stress are especially prominent in the construction monitoring process. The control of the construction process of prestressed concrete continuous rigid frame bridge is an important link to ensure the construction quality and safety. It is also an important measure to ensure the alignment and stress state of the bridge to meet the design requirements. The cantilever pouring continuous rigid frame bridge constructed by hanging basket is mainly based on the real-time observation of the deflection, stress and temperature of the structure and the modification of the structural parameters of the model. The deflection deformation and the structural stress of the next construction segment are forecasted. Thus the final design state is achieved and the bridge alignment and stress meet the design requirements. In this paper, combined with AK4 240 prestressed concrete continuous rigid frame bridge, the stress in construction monitoring is studied. The main contents and results are as follows: 1. The characteristics and construction of continuous rigid frame bridge are analyzed. This paper summarizes the development status of bridge construction monitoring technology at home and abroad, points out the importance and necessity of bridge construction monitoring, summarizes the construction monitoring theory from the aspects of the purpose, method and principle of construction monitoring and control. The control principle and key problems of construction monitoring are analyzed. Based on the AK4 240 large bridge project, the construction monitoring system is established, and the bridge construction process is simulated and analyzed by using the bridge doctor software. The internal force and stress of the bridge during the construction process and the operation of the bridge are calculated. Combined with the checking calculation structure, the real-time monitoring of the construction process of the bridge is carried out to ensure the construction quality and safety, to ensure the stress and to meet the requirements of the alignment.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

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