The Fabrication Control Application Research Of Six Tower Cable-Stayed Bridge Based On Geometry Control Method

This thesis is based on Jiashao sea-crossing highway bridge as the engineering background,which focuses on the research of the fabrication control phase of geometric control method.Fabrication control stage is the foundation of the whole process of the geometric control method,however,how to determine free dimensions and free profile of each component,the fabrication error analysis method of free dimensions and free profile and the final stage affected by fabrication parameters are all need to solve in the fabrication control phase. So, the main contents of this paper are:(1)To elaborate the multi-tower cable-stayed bridge in the current development at home and abroad and the characteristics of the multi-tower cable-stayed bridge;The fabrication control development process and the fabrication control significance are detailed introduced.(2)Specifically discussed the calculation method of the non-stressed figuration of key components in cable-stayed bridges;Calculate the girder non-stressed profile,Segment of steel box girder non-stress fabrication dimensions and the non-stress angle between segments about Jiashao bridge.(3)Error analysis methods and error evaluation results are discussed in detail about steel box girder non-stress fabrication dimensions and non-stressed fabrication profile;The method of improve fabrication error impact on the final profile by correct subsequent batches fabrication non-stressed profile is proved to be effective.(4)Statistics for Jiashao bridge girder fabrication parameter error,statical error parameter including the girder weight error,segment fabrication length error and the fabrication angle error between segments,and according to the statistics of fabrication parameter error to determine two sets of values which have greater probability distribution,and then to analysis fabrication error impact on the final state.(5)As the girder weight error,segment fabrication length erro and the fabrication angle error between segments appear in the fabrication phase,the fabrication error impact on installation elevation of the construction process is analyzed and the transfer law of these three fabrication parameter error in construction process to be summarized;For the characteristics of multi-tower cable-stayed bridge,it is analysed that one of the main girder fabrication parameter error impact on the main girder final profile of the other towers.