Strengthening and pulling device of hinge gap of compositional plate girder bridge

The invention relates to the technical field of building construction equipment, and relates to a strengthening and pulling device of a hinge gap of a compositional plate girder bridge. Twisted steels are formed on the middle portion of hinge joints of a joint position of a plate girder bridge precast slab beam in an up and down communicated type, the top of the twisted steels is fixed with a top steel plate, the top of the twisted steels is parallel to an upper surface of the top steel plate, a gap of the connecting part is filled with a plug welding; an epoxy mortar leveling layer is filled between the top steel plate and the precast slab beam in a mat spread type; the bottom of the twisted steels is provided with a bottom steel plate in communication, the bottom steel is fixed on the side face of the precast slab beam through a screw cap, the epoxy mortar leveling layer is filled between the bottom steel plate and the precast slab beam, and utilizing the same mat spreading method and the same material with the epoxy mortar leveling layer on the top; the top steel plate and the bottom steel plate achieve a pulling strengthening function through the rotation of the screw cap of the twisted steels; the strengthening and pulling of device of the compositional plate girder bridge hinge gap has the advantages of being simple in main body structure, convenient to prepare, quick in construction and operation, and no need to delay traffic in strengthening process.