【摘要】 二一工程大跨度钢桁架数量多、分布广，通过采用临时格构式支撑，屋面桁架支撑顶部设置横梁，桁架分段通过定位模板与支撑顶部横梁连接，吊装单元之间的嵌补杆采用高空散拼方式进行安装，实现对大跨度钢桁架精确安装，为类似项目钢结构施工提供参考。更多还原

【Abstract】 The 21 project has a large number of and widely distributed wide-span steel trusses.Accurate installation of wide-span steel truss was realized through application of temporary lattice support, setting beam on the roof truss support top, using positioning formwork to connect divided truss with support top beam and aerial assembly of compensation rod among units. It provided references for similar steel structure construction projects.更多还原