| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint structure of a segment ring which enables a plurality of the segment rings to be installed along a curved shape of a curved section of a tunnel when installed in the curved section of the tunnel while being joined to one another, and enables the meandering of the segment rings to be corrected with ease. SOLUTION: The plurality of segment rings 1 are installed in the curved section of the tunnel in such a manner as to be adjacent to one another in the axial direction of the tunnel. The segment ring 1 is assembled by installing a plurality of segments 2 while joining them to one another in the circumferential direction of the tunnel. A taper 1a which is inclined in a direction crossing the axial direction of the tunnel is formed on the pit mouth-side jointing surface of each of the segment rings 1. A plurality of male joints 3 and a plurality of female joints 4 which are fitted to each other are provided at predetermined intervals in the circumferential direction of the segment ring 1 on pit mouth-side and face-side jointing surfaces of each of the segment rings 1, respectively. The number of the provided female joints 4 is larger than that of the provided male joints 3. The male joint 3 and the female joint 4 are fitted to each other. COPYRIGHT: (C)2008,JPO&INPIT
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