Road-rail layered bridge pier and beam combination structure suitable for multi-span long coupling and large expansion and contraction quantity beams on both sides

The invention relate to the technical field of bridge structures, in particular to a road-rail layered bridge pier and beam combination structure suitable for multi-span long coupling and large expansion and contraction quantity beams on both sides. The road-rail layered bridge pier and beam combination structure suitable for the multi-span long coupling and large expansion and contraction quantity beams on both sides comprises a bearing platform and a bridge pier positioned on the bearing platform, and further comprises a pier-beam combination section and a beam part. The pier-beam combination section is of a reinforced concrete structure cast and fixed at the upper end of the bridge pier, and comprises beam section supporting parts for supporting the multi-span long coupling and large expansion and contraction quantity beams on both sides at two ends in the bridge direction and a beam part supporting part for bearing the beam part in the middle. The beam part is fixed to the beam part supporting part for connecting the multi-span long coupling and large expansion and contraction quantity beams on both sides, an expansion and contraction joint is reserved between the two ends of the beam part in the bridge direction and the multi-span long coupling and large expansion and contraction quantity beams on both sides, and the beam part comprises an upper deck and a lower deck. Thepier and beam combination structure skillfully solves a series of difficult problems caused by the continuous arrangement of multi-span long coupling and long-span bridges through a series of measures, effectively improves the overall arrangement of the bridge hole span, and has reasonable and safe structural stress and good economic benefits.