The invention relates to an adjustable prestressed steel structure bridge
expansion joint device which comprises an
expansion joint main body mechanism, and the
expansion joint main body mechanism comprises edge beams, channel steel frames, supporting vertical plates, fixing ribs, rubber strip grooves, middle beams, a
displacement control box, cross beams, rubber supports, sliding supports, lateral fixing foot ribs and bottom fixing foot ribs. The two sets of edge beams are symmetrically arranged on the two sides of the bridge expansion joint, each edge beam is composed of a channel
steel frame, a plurality of sets of supporting vertical plates and fixing ribs, the supporting vertical plates are evenly distributed on the outer sides of the two sets of edge beams, and the fixing ribs are fixedly arranged at the outward extending ends of the supporting vertical plates.
Adhesive tape grooves are formed in the channel steel frames on the sides, close to each other, of the two side beams, the middle beam is movably arranged between the two side beams, the
crack resistance and rigidity of the structure can be effectively improved, cracks on the periphery of the expansion joint are reduced, and durability is improved; real-time adjustment of the preload between the expansion joints is achieved, and the stability of the expansion joint structure is improved.