Inner supporting device of heavy caliber non-reinforcing-rib thin-wall steel pipe

The utility model discloses an inner supporting device of a heavy caliber non-reinforcing-rib thin-wall steel pipe. The structure of the inner supporting device of the heavy caliber non-reinforcing-rib thin-wall steel pipe is mainly formed by at least two pieces of arc U-steel, U-steel end plates, bolts and adjusting cushion plates. The U-steel end plates are welded at two ends of the arc U-steel, bolt holes are formed in the side edges of the U-steel end plates, the arc U-steel is radially attached to the inner wall of a thin-wall steel pipe, adjacent arc U-steel is connected into a ring through the bolt holes of the U-steel end plates by using the bolts, and the adjusting cushion plates are inserted between adjacent U-steel end plates. The inner supporting device of the heavy caliber non-reinforcing-rib thin-wall steel pipe can be rapidly attached to the inner wall of the thin-wall steel pipe, and facilitates outdoor construction. The inner supporting device of the heavy caliber non-reinforcing-rib thin-wal