Construction Control Research Of Long Span Concrete Filled Steel Tubular Arch Bridge

In recent years, as a new-type arch bridge, concrete-filled steel tubular(CFST) arch bridge has been growing up rapidly in our country with its excellent performance, and it adapted to bridge construction's factual situation.Taking the Shuyuan River Bridge that is under construction in Handan City, Hebei Province, as an example, some technical problems about CFST arch bridge's construction control discussed and studied, among which are construction technology of CFST arch bridge, the stability of structure, sectional stress and structural deformation's monitorization and control.In this thesis, a brief summarization of the main construction methods of CFST arch bridge, and it is analyzed briefly that which kind of construction methods will be used in different types. The influence on the structural behavior due to temperature and concrete creep, in CFST arch bridge, are also discussed. The analysis result indicates that temperature variation and concrete creep are important factors in the construction and operation of CFST arch bridge, and it deserves much concern.The analytical method and model of structure during the construction of CFST arch bridge with the aid of parameter identification in the paper. It put forward the emphasis of construction control and the stage of parameter identification. It is applied to Shuyuan river bridge as so. The method of gray system is introduced into the construction control of CFST arch bridge. The error of the construction process is analysis with this method, and the forecast list of the prearranged deflection is adjust according to the analysis results.The research of the thesis can be referred to the construction control of the long span CFST arch bridge.