bridge top lifting and limiting device and construction method thereof

The invention relates to a bridge top lifting and limiting device, comprising bolts, tension bolts, reaction brackets, jacks, bolt holes and reinforcing ribs; Two reaction brackets are respectively arranged on the decks on both sides of the beam joints, and the two reaction brackets form a pair of reaction brackets, the reaction brackets are arranged obliquely with the beam joints, the adjacent two reaction brackets are arranged in the shape of an eight, and the reaction brackets are evenly arranged along the beam joints; The bottom plate of the reaction bracket is vertically connected with the top plate in an L-shaped structure, the bottom plate of the reaction bracket is provided with bolt holes arranged in a matrix, bolts are arranged in the bolt holes to be fixed on the bridge deck, opposite tension holes are symmetrically arranged on the top plate of the reaction bracket, and opposite tension bolts are arranged in the opposite tension holes to connect and fasten the two reaction brackets. The invention h