JOINT STRUCTURE OF SEGMENTS

PROBLEM TO BE SOLVED: To provide a joint structure of segments in which C-shaped hardware can be designed economically without uselessness by reducing an eccentric moment caused by a tensile force acting on a joint body of the C-shaped hardware.SOLUTION: Segments 1, 2 for a tunnel lining segment ring are joined rigidly via a pair of C-shaped hardware 6, 6 including a joint body 8 and a horizontal cotter 10 which links the C-shaped hardware 6, 6. The joint body 8 is formed from a front end flange 8a, a rear end flange 8b and a web 8c which is positioned in a terminal portion between the flanges 8a, 8b, to be recess-shaped in a side surface view, which opens in a diameter direction of the segment ring. The C-shaped hardware 6 is installed in each of joint surfaces of both the segments 1, 2 to be joined, respectively. Joint bodies 8, 8 are engaged with each other. The horizontal cotter 10 is inserted between the front end flanges 8a, 8a of the joint body 8. On a surface of the horizontal cotter 10 confronted with the front end flange 8a, a projection 11 is provided in contact with the front end flange 8a. The projection 11 is provided closer to the side of the web 8c than a position passing the center of cross sections of the joint body 8 and the cotter 10.