金华体育中心体育场看台罩棚前端大拱管桁架施工技术

Construction Technology of Front Arch Pipe Truss of the Grandstand Awning in Jinhua Sports Center Stadium

金华市体育中心体育场月牙形看台罩棚钢结构为双层曲面螺栓球网架与前端大拱相结合的形式,前端大拱和落地处局部采用管桁架,跨度大,高度高,工期紧,需要直接在现场拼装,精度控制要求高,施工困难。管桁架通过设置临时支撑架作为支撑点进行分段吊装、高空拼装、整体卸载等施工技术,圆满地完成了安装任务。

Steel structure of the crescent grandstand awning in Jinhua sports center stadium is combination shape of double-layer curved bolt-ball net frame and the front arch.The front arch uses pipe truss.The truss has characteristics of large span,high and short construction period to need be assembled on-site.So the truss construction precision is high and difficult.By setting out temporary support as support point and using construction technology of being hoisted by segment,assembled in high-sky and whole unloaded,the pipe truss is installed successfully.