大跨度变截面弧拱钢箱梁制作技术
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摘要
南京禄口机场新建南指廊的钢屋盖主梁,跨度达33 m,为变截面弧形、拱高变化的钢箱梁,节点全部采用栓焊连接。该钢箱梁制作线形复杂、对接孔位精度高、焊接易变形。通过钢箱梁拼装的控制点预设、牛腿组装三维坐标定位、焊接变形控制以及螺栓精准制孔等关键技术工艺措施,使箱梁制作质量既满足设计要求,又方便现场施工,取得了良好的效益,可供同类型钢构件制作参考。
The main girder of steel roof of Nanjing Lukou Airport's newly built South Finger Gallery has a span of 33 m.It is a steel box girder with variable cross-section and arch height and all nodes are connected by bolting and welding.The fabrication of the steel box girder is characterized by complicated alignment,high accuracy of butt hole position and easy deformation during welding.The key technological measures,such as preset control points of steel box girder assembly,three-dimensional coordinate positioning of bracket assembly,welding deformation control and precision bolt hole-making,make the box girder fabrication quality not only meet the design requirements,but also facilitate on-site construction,which has achieved good benefits and can provide reference for the fabrication of similar steel components.
The main girder of steel roof of Nanjing Lukou Airport's newly built South Finger Gallery has a span of 33 m.It is a steel box girder with variable cross-section and arch height and all nodes are connected by bolting and welding.The fabrication of the steel box girder is characterized by complicated alignment,high accuracy of butt hole position and easy deformation during welding.The key technological measures,such as preset control points of steel box girder assembly,three-dimensional coordinate positioning of bracket assembly,welding deformation control and precision bolt hole-making,make the box girder fabrication quality not only meet the design requirements,but also facilitate on-site construction,which has achieved good benefits and can provide reference for the fabrication of similar steel components.
引文
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[2]严德洪.钢箱梁制作工艺及现场拼接控制[J].钢结构,2006(2):64-68.
[3]赵巧良,祝良荣,孙立中,等.高层箱型柱内隔板的组合焊[J].热加工工艺,2017(15):264-266;268.
[4]傅乐平,张子煜.钢箱梁板单元焊接变形控制措施[J].港工技术,2018(12):64-66.
[5]柴磊.钢箱梁制造变形控制方法[J].施工技术,2015,44(12):195-198.
[6]李翠光,钱志忠,苏中海,等.无锡金匮大桥钢结构工程下承式钢桁梁+钢箱梁结构体系加工制作技术[C]//中国建筑金属结构协会钢结构专家委员会组.大型复杂钢结构建筑工程施工新技术与应用.北京:中国建筑工业出版社,2012.
[7]满新杰,李洪珍,李靖良.大跨度钢箱梁板单元制造工艺简介[J].市政技术,2009,27(4):363-364.
[8]陈友明,王恒,王正华,等.大跨度变截面多轴线巨型钢箱梁安装技术[J].建筑技术,2004,35(6):454-455.