上海世博会演艺中心屋顶钢结构吊装技术

Hoisting Technology on Roof Steel Structure of Performance Center in Expo 2010 Shanghai China

上海世博会演艺中心屋盖结构为巨型悬臂桁架和组合桁架形成的钢屋盖,中心区域屋面钢结构由36榀径向桁架和4道环向桁架组成。结合桁架吊装施工场地狭小、桁架跨度大、构件数量多等特点,提出总体吊装技术路线:场内布置4部塔吊分区吊装,先吊装6榀南北向、东西向主桁架,后吊装扇形桁架,由外到内对称节间综合安装,总体分步有序卸载。指出安装桁架时设置临时支撑,主要采用609支撑钢管和塔身支架,并给出临时支撑的具体安装措施。通过对楼板以及主梁的验算分析得出,该支撑体系符合规范和施工要求。

The roof structure for Perfomanco Center of Expo 2010 is composed of large cantilever truss and composite truss, whose steel roof of center area is composed of thirty six radial trusses and four ring trusses. Combining with the hoisting characteristic of narrow site, large span truss and many components, the general hoisting technology is put forward, which is that setting four tower cranes to hoist six noith-south and west-east main trusses firstly, hoisting sector trusses secondly, making comprehensive symmetric intemode hoisting from outside to inside and doing orderly unloading. It is also pointed out that temporary support should be set during installing trusses, which mainly are 609-type steel pipe and tower body support, and the detail instaUation methods for temporary support are introduced. By checking and analyzing the stresses of floor and main beam, the results show that the support system can meet requirements.