As a space truss system,grid frame is widely used in large-span structures because of its perfect integrity,good stability,high spatial rigidity and good seismic performance.Conventional grid frame installation methods mainly include integral lifting method,high-altitude sliding method,strip hoisting method and high-altitude bulk method,etc.However,the ultra-high heavy-duty welded ball grid frame is different from the general bolted ball grid frame.It has a larger span and can carry much more load,and the corresponding construction and installation difficulties and safety risks are higher.It is difficult to efficiently and successfully achieve the structural formation using only a single conventional installation method.This paper takes the steel roof of the indoor ski resort of the Shanghai Lingang Ice and Snow Star project as the background,introducing its installation technical route of"assembly in situ with original posture and integral lifting in blocks",as well as the corresponding construction process analysis and improvement measure.Through the research on key processes such as support frame assembly,lifting control and unloading,this paper provides reference for the installation construction schemes of similar large-span steel structure roofs in the future.
关键词
重型焊接球网架/施工全过程分析/胎架拼装/分块整体提升/多类型卸载工艺
Key words
heavy-duty welded ball grid frame/analysis of the whole construction process/support frame assembly/integral lifting in blocks/multi-type unloading process
维普
万方数据