Construction Technology of Steel Roof for Ultra-high Heavy-Duty and Large-Span Indoor Ski Resorts
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.
heavy-duty welded ball grid frameanalysis of the whole construction processsupport frame assemblyintegral lifting in blocksmulti-type unloading process
万方数据
维普
