坝陵河大桥桥面吊机过铰监控技术  

Monitoring and Control Technique for Deck Cranes Traveling over Hinges of Baling River Bridge

作　　者：何雨[1] 陶路[1] 彭旭民[1] 

机构地区：[1]中铁大桥局集团桥科院有限公司,湖北武汉430034

出　　处：《世界桥梁》2011年第1期27-30,共4页World Bridges

摘　　要：坝陵河大桥钢桁梁采用桥面吊机由桥塔向跨中进行有铰逐次刚结法架设,在临时铰安装阶段,铰前、后梁段相对坡度较大,桥面吊机通过此处时可能存在爬坡困难、稳定性差,甚至有倾覆的危险。采用有限元软件对桥面吊机过铰全过程及铰部下弦开口量的参数敏感性进行分析,并进行实桥加载试验。据此提出吊机过铰的控制重点及解决方法。实施结果表明,通过对吊机过铰梁段最大坡度控制在5%以内及过铰过程中铰部下弦开口量的变化量控制在150 mm以内,可较好地保证过铰梁段的平顺性和吊机过铰的平稳性及安全性。The steel truss girder of Baling River Bridge is erected by deck cranes by the hinged step-by-step rigid connection method from the towers towards the midspan.At the stage of installation of the temporary hinges,the relative gradient of the girder blocks in front of and in rear of a hinge is rather great and there may exist the problems of difficulty,poor stability and even overturning risk when the cranes travel over the hinge.The whole process of the cranes traveling over the hinges and the parameter sensitivity of the opening amount at lower chords of the hinges are analyzed by the finite element software and the loading tests are made for the practical bridge,according to which the key control points and solution to the safe traveling of the cranes are proposed.The results of implementation of the proposal show that the control of the maximum gradient of the girder blocks within 5% and the variation of the opening amount at the lower chords within 150 mm at the time the cranes travel over the hinges can effectively ensure the smoothness of the girder blocks and the stability and safety of the cranes.

关 键 词：悬索桥 钢桁梁 有铰逐次刚结法 桥面吊机 临时铰 施工监控 

分 类 号：U445.3[建筑科学—桥梁与隧道工程]