Bridge supporting structure suitable for rapid construction of multi-header box girder

The invention relates to a bridge supporting structure suitable for rapid construction of multiple header box girders, two header box girders are arranged at the top of a pier column top bearing beam, and a supporting mechanism between a pier column and the box girders comprises a plurality of fixed supports and detachable temporary supports; the temporary support comprises a middle support and side supports located on the two sides of the middle support, each of the middle support and the side supports comprises a top plate and a bottom plate, lifting mechanisms are arranged between the top plates and the bottom plates, and a plurality of lifting mechanisms located in the middle support are symmetrically arranged; a driving assembly for driving the movable sliding block to move is arranged between the top plate and the bottom plate in the middle support; according to the structure, through lifting of the temporary support, the stress section of the box girder in the simultaneous construction process is enlar