Auxiliary dismantling device for upper and lower overlapped concrete supporting beams and construction method

The invention relates to the technical field of auxiliary dismantling devices, and provides an upper and lower overlapped concrete supporting beam auxiliary dismantling device which comprises a base, a support and a jacking assembly. A plurality of universal wheels are mounted at the bottom of the base; the bottom of the support is connected to the base through a connecting piece. The jacking assembly comprises a plurality of jacking jacks, the jacking jacks are vertically arranged upwards, and the bottoms of the jacking jacks are connected to the top of the support through connecting assemblies. The jacking assembly further comprises a supporting plate, the supporting plate is located above the multiple jacking jacks, and piston rods of the jacking jacks are detachably connected to the bottom side of the supporting plate. The device has the advantages that when a forklift cannot enter a site for operation, the detached lower-layer concrete supporting beam can be conveniently moved out of the bottom of the up