| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint structure capable of easily and speedily connecting adjacent members to each other, a low-cost joint for segments with significantly improved executability capable of connecting segment rings to each other only by inserting the joint structures in the direction of a tunnel, segments using the joint for segments, and a shield tunnel using the segments. SOLUTION: The joint structure 6 is constituted of a male metal fixture 5 and a female metal fixture, and the male metal fixture 5 is provided with a protruded member 6 provided with an enlarged tip part 6a, a root part 6b provided with an opening 6b, and a shaft part 6c for connecting the tip part 6a to the root part 6b, a housing member 7 which rotatably houses the root part 6b and is provided with a through hole 10, an elastic member 8 with one end connected to the protruded member and the other end connected to the housing member to generate a repulsive force by the rotation of the protruded member, and a rod member 9 which fixes the protruded member and is separable from its intermediate part.
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