Reinforcing method for additionally arranging beam-slab structure on old stone arch bridge

The invention discloses a reinforcing method for additionally arranging a beam-slab structure on an old stone arch bridge. The method specifically comprises the following steps of rechecking the bearing capacity of a foundation structure, dismantling an original bridge deck system, treating diseases of the stone arch bridge, newly building a beam-slab bridge lower structure, hoisting a form, newlybuilding a beam slab, newly building a bridge deck system and additionally arranging a decorative plate. According to the reinforcing method, the beam slab is additionally arranged on the old stone arch bridge, necessary construction measures are adopted, the newly-built beam slab and an original arch ring do not work together, and the beam slab is the main stress component, so that the bearing capacity of the bridge is improved, and the use safety of the bridge is ensured; and compared with dismantling and reconstruction, the engineering scale is effectively reduced, the construction speed is high, the construction