Research On The Technology Of Large Tonnage Steel Truss Girder Erection By The Push Method

Based on Taizhou-Rugao canal bridge 80 m steel truss girder erection of Qidong-Nanjing double track railway as the background, Study on the method of floating incremental launching large-tonnage steel truss girder construction technology. In this paper, according to large span,large tonnage, cross channel, close to buildings, and poor geological conditions, narrow waterways and other bad construction conditions, further expounds the steel girder construction overall plan, construction process, construction technology and quality control, etc. Combining with the characteristics of engineering, design and check slide system, floating system, incremental launching system and direction control system.And introduces how to use rail and large tonnage rolling device compose slipway, combat readiness equipment spellers large size overall floating pier, using hydraulic self-locking creep pushing device as power equipment such as process method, structural design and construction technology.Floating incremental launching method has been used in the construction of large and medium span medium tonnage steel girder, but during the construction of long-span, large-tonnage steel truss girder does not use more, also does not have a systematic study. Through the engineering example, this paper provides a systematic theoretical basis,also provide a reference for similar projects.Practice has proved,floating incremental launching method of erection large-tonnage steel truss girder technology is advanced, safe and reliable, low cost, high efficiency, to create a good social benefit and economic benefit.