Transversely-widening splicing structure of three-dimensional prestress concrete continuous box girder bridge

• Main Authors: ZHAI JIANXUN, WU WENQING
• Format: Patent
• Language: English
• Published: 20.05.2015
• Subjects: ASSEMBLY OF BRIDGES; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS; OR VIADUCTS

The invention discloses a transversely-widening splicing structure of a three-dimensional prestress concrete continuous box girder bridge. While flange plates of a new box girder and an old box girder are kept separated, the new box girder and the old box girder are connected by adding transverse reinforcing ribs which are longitudinally arranged at intervals. The whole transversely-widening splicing structure comprises the old box girder, the new box girder, the transverse splicing reinforcing ribs, longitudinal splicing seams, rubber belts, anchoring bolts and bridge surface laying layer, wherein the rubber belts, the anchoring bolts and the bridge surface laying layer are arranged on the longitudinal splicing seams. The transversely-widening splicing structure is characterized in that the transverse splicing reinforcing ribs are arranged between webs of the new box girder and the old box girder at certain intervals so that a new main beam and an old main beam can be connected together; meanwhile, the flange plates of the new box girder and the old box girder are separated, and the plate type rubber belts are laid on the separation seams. The plate type rubber belts are fixed to the flange plates through the bolts, and the top faces of the rubber belts are flush with the bridge surface laying layer. By means of the transverse splicing method, the defect that three-dimensional prestress concrete box girder flange plates can not be removed is overcome, the problem caused when the ribs are transversely planted at the ends of the flange plates is solved, and the purpose of transverse splicing of the three-dimensional prestress concrete continuous box girder bridge is well achieved.