Construction method of structure for preventing bumping at bridge head

The invention discloses a construction method of a structure for preventing bumping at a bridgehead. The construction method comprises the steps of roadbed treatment, installation of prestressed tendons, installation of a butt strap support and a butt strap rear beam, installation of a left side plate and a right side plate, installation of a water bag body, installation of a butt strap, water filling of the water bag body, stretching of the prestressed tendons and pavement construction. When settlement of a roadbed transition section is found through reading of a pressure data acquisition instrument or visual inspection in the later period, the height of the water bag body is adjusted in the mode that the water bag body is filled with water through the water filling and discharging system, the top of the water bag body is made to make contact with the bottom face of the transition slab all the time, and the water bag body provides supporting force for the transition slab; the support obtained by the transiti