非对称外倾式钢拱桥原位拼装施工定位技术

发布时间：2018-04-21 06:34

  本文选题：外倾式拱肋 + 定位方法　； 参考：《铁道科学与工程学报》2017年11期

【摘要】：外倾式箱型拱肋的定位,采用控制点的绝对误差为准则,往往会隐藏定位节段的偏转误差,影响安装节段与整体的控制精度。以总跨径231 m的外倾式非对称吊杆拱桥为研究对象,建立有限元分析模型,分析非对称外倾式桥梁钢拱肋、钢箱梁的安装控制过程,提出采用轴线和偏角双控的定位方法,可靠地控制外倾式拱肋、非对称受力的箱梁节段的安装与施工精度。通过该方法在建工程外倾式拱肋节段的空间定位过程中的应用,验证了方法的实用性,可靠地减小拱肋、箱梁在安装过程中的施工误差,为外倾式拱桥等类似工程的拼装施工提供借鉴。
[Abstract]:When the absolute error of the control point is used as the criterion, the deflection error of the positioning section is often hidden, which affects the control accuracy of the installation segment and the whole. Taking the external tilted asymmetric suspension arch bridge with total span of 231 m as the research object, the finite element analysis model is established, and the installation control process of the steel arch rib and steel box girder of the asymmetric external tilting bridge is analyzed. The positioning method of double control of axis and deflection angle is put forward. The installation and construction accuracy of the section of the box girder subjected to asymmetrical force is controlled reliably. Through the application of this method in the spatial positioning process of the extraversion arch rib section of the construction project, the practicability of the method is verified, and the construction error of the arch rib and the box girder in the installation process is reduced reliably. It can be used for reference in assembling construction of similar projects such as extroverted arch bridges.
【作者单位】： 华南理工大学土木与交通学院;
【基金】：国家自然科学基金资助项目(51478193) 中央高校基本科研业务费专项资金资助项目(2015ZM114) 中国博士后科学基金资助项目(2016M592490)
【分类号】：U445.4
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本文编号：1781317