Stress and Stability Analysis of Unequally Spaced Supports in Launching Construction of Curved Steel Box Girder Bridges

In view of the problems of complex stress, great difficulty in analysis and high technical requirements for safety control of unequal support structure of curved continuous steel box girder bridge across railway tunnel, the mechanical performance and structural stability of three kinds of temporary supports with different structures, different heights and different spacing in the process of launching construction are analyzed by numerical simulation method. Then, the stress and deformation of the slideway beam are studied. By comparing with the measured data, the reliability and feasibility of the temporary support system for bridge erection are verified. Combined with theoretical analysis, the research results were successfully applied to the launching construction of curved continuous steel box girder bridge to ensure the safety of unequal spacing supports during the launching construction.