人民日报社报刊综合业务楼屋顶大跨度双曲面拱形钢桁架安装技术.pdf

2014年3月下 施工技术 第43卷第6期 CONSTRUCTION TECHNOLOGY 33 D0I:10.7672/5js2014060033 人民日报社报刊综合业务楼屋顶大跨度双曲面 拱形钢桁架安装技术* 王宪璋，李铁良，杜小红 (中国新兴建设开发总公司，北京100039) [摘要]结合人民日报社报刊综合业务楼屋顶塔冠大跨度双曲面拱形钢桁架散件运输、现场组拼分段吊装合龙过 程，介绍了分段钢桁架的地面组拼胎架制作、三维坐标控制卧式组拼过程.钢桁架安装采用钢支撑代替承重脚手 架，介绍了钢支撑的设计以及分段钢桁架的就位姿态调整、吊装合龙、卸载等技术要点，并对钢支撑形式和卸载后 的变形进行验算，解决了架空层难以搭设承重脚手架的难题，保证了桁架的安装质量，取得了很好的效果. [关键词]钢结构；安装；钢桁架；组拼胎架；卸载 [中图分类号]TU398.3 [文献标识码]A [文章编号]1002-8498(2014)06-0033-03 Installation of Large-span Hyperboloid Steel Arch Truss for the People's Daily Project Wang Xianzhang Li Tieliang Du Xiaohong China Xinxing Construction Derelopment General Co.Beijing 100039 China) Abstract:Large-span hyperboloid tower crown of the main building of People's Daily project is made of arched truss parts.Detailed description of steel support designing adjustment of pose placement of steel truss segments lifting closure unloading and other points is made by using procedure of segments transportation in-site assembling segments lifting closure process.Furthermore a specialized software is used to check the form of steel structure support and deflections after unloading.This carries out a solution to ensure that overhead layer supports the scaffold.It also ensures installation quality of trusses therefore achieves good results. Key words:steel structures;installation steel truss;assembly jig;unloading 1工程概况 在主桁架弦杆上的牛腿与主桁架相连，弦杆为 人民日报社报刊综合业务楼工程（以下简称日325×10，腹杆为168x×6.其余杆件为219x8. 报社)屋顶塔冠为大跨度双曲面拱形钢桁架.屋顶 桁架生根标高为148.3m 最高点标高为180m.整 钢结构为3主桁架和22平面次桁架及400余 个屋顶钢结...