Long Span Curved Continuous Rigid Frame Bridge Pier Deflection And The Torsion Angle Control Research

With the development of bridge construction technology in China continue to mature,more and more long-span bridges, for monitoring problems in construction are more and more attention. This paper takes the Yanru high speed 33 tenders Heilong Bridge as an example,research and analysis to the attention problems in construction monitoring.This paper first describes the present status of the development situation and the bridge construction ability, as well as the basic principle of construction control emphasis on the former law and regression method. Then through the analysis of the various load cases, closed at both ends of the pier in the direction of Y axis displacement and torsion angle, draw the curve bridge cannot consider the impact of the torsion angle, draw the curve bridge cannot consider the impact of the torsion angle. The whole process of the project to the implementation of the bridge monitoring, by establishing the finite element model, the change trend of deformation, calculate the pre camber, the stress and strain of the theoretical value, to guide the construction. The closure error and stress error in a reasonable range, the continuous rigid frame bridge can safely smooth closure.Through the study of detailed on both ends of bridge pier and span closure segment in bridge pier, calculate the deflection and torsion angle, can better linear control and stress monitoring, the bridge for the future as a reference.