黄家村铁路桥施工监控技术研究

发布时间：2018-06-15 12:27

本文选题：预应力连续梁桥 + 悬臂施工　；参考：《湖北工业大学》2015年硕士论文

【摘要】：“十一五”规划以来,我国高速铁路进入黄金发展期,高速铁路网不断扩容,越来越多的高铁、城际铁路兴建,带动大跨度桥梁进入繁荣发展阶段。为保证桥梁结构运营的安全性、可靠性、耐久性、行车舒适性等,对特大桥梁施工全过程进行监测监控,已成为大型桥梁建设必不可少的重要环节。懫用悬臂浇筑法施工的预应力连续梁桥,在施工过程中必然会引起复杂的内力和位移变化,为了确保大桥的施工质量和安全,必须进行桥梁施工监控。以黄家村铁路桥为工程背景,懫用自适应的施工控制方法,对黄家村铁路桥施工监控进行研究,主要进行了如下工作:1、根据黄家村铁路桥设计及结构特点,按照桥梁施工及监控要求,编制了该桥的施工阶段监控方案。2、利用Midas/Civil建立黄家村铁路桥的计算机三维仿真模型,进行铁路桥施工阶段的仿真模拟,分析了桥梁在施工阶段及大桥合拢后的箱梁受力和线形变化情况。并用了参数敏感性分析法,对影响桥梁结构受力和线形的设计参数进行分析,以便获得关键设计参数对主梁线形和应力影响的规律。3、依据监控方案对黄家村铁路桥主桥进行了桥梁结构线形监控。主要监控了桥梁关键断面的温度及应力变化情况,各节段的标高和全桥的线形。根据桥梁现场监测结果对理论计算参数进行修正,使理论计算参数和现场实际情况相吻合,从而指导桥梁现场施工,确保了桥梁整个施工过程的质量和安全。4、分析主梁应力及线形监测数据,通过实测值与理论值对比可知:黄家村铁路桥主桥理论线形计算结果和实测线形结果基本吻合,黄家村铁路桥主桥顺利合龙,线形平顺,各项指标满足规范要求;黄家村铁路桥主桥施工过程中各控制截面的实测应力结果和理论应力计算结果基本吻合,桥梁施工过程中结构始终处于安全状态。
[Abstract]:Since the 11th Five-Year Plan, China's high-speed railway has entered the golden period of development, the high-speed railway network has been continuously expanded, more and more high-speed rail, inter-city railway construction, driving long-span bridges into the stage of prosperity and development. In order to ensure the safety, reliability, durability and driving comfort of the bridge structure, monitoring and monitoring of the whole process of the construction of the large bridge has become an indispensable and important link in the construction of the large bridge. In order to ensure the construction quality and safety of the bridge, the prestressed continuous beam bridge constructed by cantilever pouring method will inevitably cause complex internal force and displacement changes during the construction process. In order to ensure the construction quality and safety of the bridge, it is necessary to carry out the bridge construction monitoring and control. Taking the Huangjia village railway bridge as the engineering background and using the adaptive construction control method, the construction monitoring and control of the Huangjiacun railway bridge is studied. The main work is as follows: 1. According to the design and structure characteristics of the Huangjiacun railway bridge, According to the requirements of bridge construction and monitoring, the monitoring scheme of the bridge in construction phase. 2. The computer 3D simulation model of Huangjiacun railway bridge is established by Midas / Civil, and the simulation of the construction stage of the bridge is carried out. The stress and linear changes of the bridge box girder during the construction stage and after the bridge closure are analyzed. The parameter sensitivity analysis method is used to analyze the design parameters which affect the force and the line shape of the bridge structure. In order to obtain the influence of key design parameters on the shape and stress of the main beam, the main bridge of Huangjiacun railway bridge was monitored according to the monitoring scheme. The temperature and stress of the key section of the bridge, the elevation of each section and the alignment of the whole bridge are monitored. According to the monitoring results of the bridge, the theoretical calculation parameters are modified to make the theoretical calculation parameters coincide with the actual situation on the spot, thus guiding the bridge construction on the spot. The quality and safety of the whole construction process of the bridge are ensured. The stress and linear monitoring data of the main girder are analyzed. By comparing the measured values with the theoretical values, it can be seen that the calculated results of the theoretical alignment of the main bridge of Huangjiacun Railway Bridge are basically consistent with the measured results. The main bridge of Huangjiacun railway bridge is closed smoothly, the alignment is smooth, the indexes meet the requirements of the code, the measured stress results of each control section in the construction process of the main bridge of Huangjiacun railway bridge are basically consistent with the theoretical stress calculation results. The structure of the bridge is always in a safe state during the process of construction.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

【共引文献】