Plate girder jacking and supporting structure for bridge

The plate girder jacking and supporting structure for the bridge comprises a mechanism body and an operation controller used for controlling the mechanism body to ascend and descend, and the mechanism body comprises a reinforcing base and a jacking frame body; the reinforcing base sequentially comprises a lower protection frame and an upper protection frame from bottom to top, the lower end of the lower protection frame is fixedly connected with a positioning base, the front and rear sides of the lower protection frame and the upper protection frame are each provided with a plurality of supporting staggered frames, and the left and right sides of the lower protection frame and the upper protection frame are each provided with a plurality of supporting columns; the multiple jacking frame bodies are evenly distributed on the left side and the right side of the interior of the upper protection frame. The bearing strength of the supporting steel pipe is enhanced, it is guaranteed that when the height of the suppo