CONNECTION STRUCTURE FOR SEGMENT

摘要

PROBLEM TO BE SOLVED: To provide a connection structure capable of forcibly restraining two segments from shifting from each other by using a joint having a compact and simple structure and a strong coupling force for mutually connecting both segments. SOLUTION: In this connection structure 1, a male joint 4 disposed at a position where the tabular basal part 5 is separated by two sheets to form a roughly C-shaped section and a female joint 3 disposed at a position where the tabular basal part 5 is put close to each other by two sheets to form a roughly T-shaped section, are used. The basal part 5 of the two sheets of the male joint 3 is inserted in the slit 10 of the roughly C-shaped female joint 4. The engaging parts 6 of both joints 3, 4 are engaged with each other to firmly connect both segments 2. A line extending in the axial direction of a tunnel at the basal part 5 is stretched on a plane parallel to a plane extending in the axial direction of the tunnel at the folding position of an exposed end forming the engaging part 6 in the basal part 5 of both joints 3, 4 to firmly connect the segments by only sliding the segments 2 in the axial direction of the tunnel and restrain the segments from shifting in radial direction of the tunnel.