Reinforcing device and reinforcing construction method for prestressed hollow slab bridge

The invention relates to the technical field of bridge construction, and provides a prestressed hollow slab bridge reinforcing device which comprises a first steel structure plate and a second steel structure plate which are fixed to the belly portions of the two sides of a hollow slab, a plurality of first abutting pieces are arranged on the side face of the first steel structure plate, and the outer side faces of the first abutting pieces are arranged in an arc shape. A second abutting piece is arranged on the side face of the second steel structure plate, and the outer side face of the second abutting piece is in an arc shape. In the fixed state, the first abutting pieces and the second abutting pieces are alternately arranged in the vertical direction to jointly form a reinforcing structure, and the arc faces of the first abutting pieces on the hollow slabs and the arc faces of the second abutting pieces on the adjacent hollow slabs abut against each other for limiting. The reinforcing device further comp