Construction method for dismantling aluminum alloy pedestrian overpass

The invention relates to the technical field of construction, in particular to a construction method for dismantling an aluminum alloy pedestrian overpass, which comprises the following steps of: S1, dismantling accessory structures of a main truss and a stairway truss of the overpass; s2, a fence is vertically arranged on a road at one end of the overpass, and traffic guide and change are conducted; s3, calculating the gravity centers of the main truss and the stairway truss of the overpass; and S4, according to the gravity center of the main truss and the gravity center of the stairway truss, the lifting points of the main truss and the stairway truss are determined correspondingly, so that the main truss and the stairway truss are lifted correspondingly, and the main truss and the stairway truss are moved into the fence. According to the construction method for dismantling the aluminum alloy pedestrian overpass, the dismantling efficiency of the overpass can be improved, and the influence on traffic is red