Steel pipe ring piece capable of achieving rapid freezing of stratum and machining method of steel pipe ring piece

The invention discloses a steel pipe ring piece for achieving quick freezing of a stratum and a machining method of the steel pipe ring piece, and belongs to the technical field of tunnel construction. The steel pipe ring piece comprises a plurality of arc-shaped steel pipe pieces which are sequentially connected to form the steel pipe ring piece. The rib plates are fixedly connected to the inner surfaces of the arc-shaped steel pipe pieces in the mode of being perpendicular to the inner surfaces of the arc-shaped steel pipe pieces, the length directions of the rib plates are arranged in the width directions of the arc-shaped steel pipe pieces, the multiple rib plates are arranged at intervals, and rib plate cavities are formed between the adjacent rib plates; the communication holes are formed in the rib plates in a penetrating manner and communicate the adjacent rib plate cavities; the sealing plate is used for sealing each rib plate cavity; the water inlet connector communicates with the rib plate cavity a