UNDERGROUND STRUCTURE ENCLOSURE

摘要

PROBLEM TO BE SOLVED: To provide an underground structure enclosure capable of preventing the shakiness of an inside cylindrical body to an outside cylindrical body to stably support the inside cylindrical body. SOLUTION: The underground structure enclosure includes the outside cylindrical body 12 forming female screw sections 12a on the inside circumference and the inside cylindrical body 11 forming male screw sections 11a capable of screwing on the female screw sections 12a of the outside cylindrical body put on the outside cylindrical body 12 on the circumference, and since projections 13 are arranged to three positions among faces abutting the female screw sections 12a on the male screw sections 11a at approximately 120 degrees intervals in a plane view, the inside cylindrical body 11 can be stably supported because the shakiness thereof to the outside cylindrical body can be prevented.