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    • 24. 发明专利
    • SIDE FACE SEALING TYPE JOINT STRUCTURE AND SEGMENT
    • JPH11350886A
    • 1999-12-21
    • JP16363598
    • 1998-06-11
    • KUMAGAI GUMI CO LTD
    • KIDO YOSHIKAZUOKAMOTO TATSUYATASHIRO NOBORU
    • E21D11/04E21D11/08
    • PROBLEM TO BE SOLVED: To provide a joint structure requiring no anticorrosive treatment and secondary lining by suppressing a gap and an irregularity of joints on the working face side of a segment using a locking metal fitting on the working face side in a tunnel in which sections between segments in the circumferential direction are abutted only. SOLUTION: A concrete segment 1 having a predetermined wall thickness is on a side face 6 on the working face side in the axial direction of a tunnel of the segment 1 and on a central line in the direction of its thickness, and an engaging hole 4 is provided at a position retracted from an abutment end face 3 in the circumferential direction of the tunnel of both segments 1, 1. An engaging projection 8 provided in a main body part of a locking metal fitting 7 on the working face side is engaged with an engaging recessed part of the segment 1, the main body part of the locking metal fitting 7 on the working face side is fitted in a fitting recessed part provided on a side face of the working face side in the axial direction of the tunnel of each segment 1, 1 in such a way that it does not protrude from the side face, and the segments 1 are connected by the locking metal fitting on the working face side 7 positioned on the central line in the direction of its thickness.