Tail water tunnel excavation supporting structure

The utility model discloses a tailrace tunnel excavation supporting structure, which relates to the technical field of supporting structures, and is characterized in that the tailrace tunnel excavation supporting structure comprises a bottom plate, the top surface of the bottom plate is fixedly connected with a supporting seat, a telescopic rod is arranged in the supporting seat, and a supporting arc-shaped frame is arranged on the top surface of the telescopic rod; the reinforcing block is installed on the top face of the supporting arc-shaped frame, arc-shaped plates are fixedly connected to the left side and the right side of the reinforcing block, and the arc-shaped plates are attached to the top face of the supporting arc-shaped frame; the supporting device has the advantages that the supporting arc-shaped frame can be stably supported through the reinforcing blocks and the arc-shaped plates, the supporting effect is enhanced, meanwhile, the supporting device can be pulled in the supporting arc-shaped fr