Research on the Design Scheme of the Mainline-to-Ramp Widened Bridge Node for the Expressway Upgrade Project of Beichen Avenue (North Second Ring Road - Qinhan Avenue)

The width of the prestressed concrete beam is integrated with the width-split width. The existing prestressed concrete beam and the width-split beam are connected by cantilevers. The horizontal steel bars are implanted in the existing bridge cantilevers and the horizontal steel bars are connected with the cantilevers of the wide beam cantilevers. The longitudinal steel bars are arranged. The cast-in-place wet joints are UHPC (ultra-high performance concrete). In the study of the design plan for the main line connection ramp wide-split bridge of Beichen Avenue (North Second Ring Road - Qinhan Avenue) rapid transformation project, the wide-split bridge was mainly studied and analyzed from two plans. Plan 1, the bridge deck was not widened, and the superstructure was hinged. The plan focused on the impact on the current bridge traffic during the construction period. The bridge deck was widened. The bridge deck was built on the outside of the current bridge. The new and old bridge deck was connected with wet joints; Plan 2, the bridge deck was widened, and the superstructure was semi-rigid. The plan focused on the impact on the current bridge traffic during the construction period. The bridge deck was widened, and the new and old bridge decks were connected with wet joints.