Auxiliary supporting device for bridge erection

The utility model discloses an auxiliary supporting device for bridge erection, which comprises a base, cushion blocks and a top seat, two detachable screw rods are arranged at the upper end of the base in bilateral symmetry, two connecting lugs are arranged at the left end and the right end of each cushion block, a plurality of cushion blocks are stacked on the base, the two connecting lugs are sleeved on the screw rods, and the lower end of the top seat abuts against the cushion block at the uppermost end. A connecting flange is arranged at the lower end of the top seat, the connecting flange is sleeved on the screw and then locked by double nuts, and the distance between the lower end face of the base and the upper end face of the top seat is 657 mm. According to the temporary span box girder erected in advance through the auxiliary supporting device, the problem that the closure period of the cast-in-place steel arch bridge conflicts with the construction period of a ballastless track bed of a simply-supp