黄冈公铁两用长江大桥钢桁梁架设技术研究  

Research of Erection Techniques for Steel Truss Girder of Huanggang Changjiang River Rail-cum-Road Bridge

作　　者：邓永锋 周明星 

机构地区：[1]中铁大桥局黄冈长江大桥项目部,湖北黄冈438000

出　　处：《桥梁建设》2013年第2期16-22,共7页Bridge Construction

摘　　要：黄冈公铁两用长江大桥主桥为双塔双索面钢桁梁双层桥面斜拉桥,钢桁梁采用散拼法架设。桥塔至辅助墩之间的钢桁梁采用双悬臂法架设,发明了一种自平衡抗风装置用于增强钢桁梁在对称双悬臂架设过程中结构的安全性;采用架梁吊机直接架设桥塔区钢桁梁;采用专用的三维空间定位吊具吊装多角度空间倾斜腹杆;研制了整体可移动施工脚手平台来提高钢桁梁架设过程本质安全;通过敏感性分析研究了多种合龙调整措施,实现了钢桁梁中跨高精度快速合龙。实践表明,整个钢桁梁架设过程安全顺利,成桥线形流畅,各项指标完全满足设计要求。The main bridge of Huanggang Changjiang River Rail-cum-Road Bridge is a doub- le-deck steel truss girder cable-stayed bridge with double pylons and double cable planes. The steel truss girder of the bridge was erected by the piece-by-piece assembling method and the girder sections between the pylons and auxiliary piers were erected by the balanced two-side cantilever method. For the erection of the steel truss girder, a kind of the self-balanced wind-resistant de-vice was invented and was used to reinforce the structural safety of the girder in the process of the cantilever erection. The deck cranes were used to directly erect the girder sections in the areas of the pylons and the special spatial positioning riggings were used to lift and install the multi-angle and spatially inclined web members. The integrally movable construction scaffolding was devel-oped and the intrinsic safety of the erection process of the girder was hence improved. On the ba-sis of the sensitivity analysis, the different closure adjustment measures were researched and the highly accurate and rapid closure of the central span steel truss girder was achieved. Practice proves the whole erection process of the girder of the bridge is safe and favorable, the geometric shapes of the completed bridge are smooth and the various indices of the bridge can completely satisfy the design requirements.

关 键 词：斜拉桥 公路铁路两用桥 钢桁梁 散拼法架设 悬臂拼装架桥 桥梁施工 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]