The invention discloses a novel reinforcement method for a two-way curved
arch bridge comprising the following steps: (1) closing to traffic on a
bridge deck, dismantling the
bridge deck and auxiliary facilities of the
bridge deck and removing fillings on arches; (2)
cutting rectangular grooves along the two-way curved
arch bridge on the top of an extrados corresponding to an original arch rib; (3) chipping the bottom of the rectangular grooves, planting anti-
shear reinforcement bars, erecting a formwork on the extrados on the top of the rectangular grooves, assembling the anti-
shear reinforcement bars and pouring concrete to form new arch ribs, of which the height is same relative to the extrados, protruding from the extrados; (4) repairing transverse walls, chipping the sections, which are at the outer side of the transverse walls along the two-way curved
arch bridge, of the extrados and the new arch ribs, planting reinforcement bars on the extrados and the new arch ribs which are chipped, erecting the formwork and pouring the concrete; (5) chipping the top of the transverse walls, planting vertical reinforcement bars and erecting new columns for supporting the bridge
deck; (6) newly building the bridge
deck. The novel reinforcement method for the two-way curved arch bridge has the advantages of being small in
dead weight of a bridge structure, good in unity of an old structure and a new structure, low in reinforcement cost, good in adaptability, not restricted by surroundings under the two-way curved arch bridge, unchanged about the original appearance of the two-way curved arch bridge, good in
operability and good in application prospect.