Device for preventing reverse arching of prestressed beam after unloading

The utility model belongs to the technical field of civil engineering structures, and discloses a device for preventing a prestressed beam from generating inverted arching after unloading, the device is provided with a steel strand and steering blocks, the steering blocks are arranged on the two sides of the top of the existing prestressed beam, and the steel strand bypasses the existing prestressed beam on the outer side of the steering blocks; the two ends of the steel strand are connected with harness screws through connectors, and the lower ends of the harness screws are fixedly connected with the bottom plate structure. The device is used for the condition that the unloading level of an existing prestressed beam is high, downward loads can be applied in a staged mode according to the unloading process, and the downward loads are reduced in a staged mode along with construction of a newly-built structure. The steel strands are wound around the beam, the steel strands are connected with the high-strength h