Jacking Construction Technology of Curved Steel Box Girder and Analysis of Its Mechanical Characteristics

In this paper, taking Lasuo No. 2 Bridge as the construction background, the walking push construction method is selected, and the existing piers and temporary supports are used as the support platform for push construction to carry out push construction and high beam falling construction. The finite element analysis software is used to establish the simulation analysis program of the pushing process. The overall simulation analysis is made for each stage of the bridge's push construction, the deflection change of the beam end and the change of the push force are obtained, and the most unfavorable working conditions are determined for local analysis. In view of the characteristics of this project, a detailed comparative analysis was made on the mechanical parameters affecting the steel box girder, and the special requirements and relevant measures for launching were studied. It is proved theoretically that the construction method is safe and reliable, and meets the structural strength and local stability requirements during the jacking construction.