大跨度平板混合网架施工技术

Construction Technology of Large-span Flat Plate Mixed Grid Frame

以南京青奥体育公园室内田径馆、游泳馆工程项目为例,对大跨度平板混合网架的钢结构屋面施工的重、难点进行了分析。在此基础上,从脚手架施工、网架支撑设置及起拱、工期及质量控制等方面,介绍了应用高空散装法进行钢网架结构施工的关键技术。经实践,网架安装完成后的挠度符合设计要求,取得了良好的效果。

Taking the indoor track and field stadium and natatorium project of Nanjing Youth Olympic Sports Park as an example,this paper analyzes the key points and difficulties in the construction of steel structure roof with large-span flat plate mixed grid frame.On this basis,the key tech no logies of steel grid structure con structi on using high-altitude bulk assembly method were introduced from the aspects of scaffold construction,grid support setting,arching,construction period and quality control.According to practice,the deflection of the grid frame after installation meets the design requirements and achieves good results.