Bridge widening split joint structure

The utility model relates to a bridge widening split joint structure. According to the bridge widening split joint structure, a design principle of 'connection on the upper part and disconnection on the lower part' is adopted, namely hollow core slabs on upper parts of new and old bridges are subjected to cast-in-place concrete wet connection, bridge floors are continuous, and abutments and foundations on lower parts of the new and old bridges are not connected and are stressed independently to adapt to differential settlement between the new bridges and the old bridges; edge slabs on the outer sides of the old bridges are replaced, only anti-collision guardrails of the old bridges are removed without remove of an abutment capping beam, and after beam slabs of the old bridges are replaced, the edges of rear beam slabs adjacent to the replaced beam slabs of the old bridges are connected with beam slabs erected on the new bridges in a bar planting mode, so that the new bridges and the old bridges are integrated firmly. The utility model has the advantages that the bridge widening split joint structure has simple construction and short constructional period, manufacturing cost is low and the new bridges and the old bridges are stressed commonly after being integrated and the like; the replaced hollow core slabs can be subjected to concentrated precast and constructed in a factory method, are suitable for widening bridges of each grade of road, meet the requirements of energy conservation of buildings, building resource conservation and environment-friendly society, and have good economic benefit and social value after being popularized.