| 摘要 |
PURPOSE: To connect segments easily and in a short time without using a bolt by installing a male metal fitting on one side and a female metal fitting on the other side in a recessed part of a joint surface in parallel to a tunnel axis for tunnel lining cement and fitting with a wedge. CONSTITUTION: A recessed part 3 is installed to a joint surface in parallel to a tunnel axis of a tunnel lining segment while a female metal fitting 1 having a slanted fitting part, whose head is gradually slanted toward a cutting face, is installed to a recessed part 3 of one joint surface. A male metal fitting 2, which wedges in the female metal fitting 1, is installed to the recessed part 3 on the other side. A total space of the recessed part of the joint required to fit both male and female metal fittings 1 and 2 is found from an equation where D>=(Bm -tm )sinθ+tf +tm , wherein Bm and tm stands for the outside length and thickness of the fitting part of the male metal fitting 2 while tf for the thickness of the female metal fitting 1, andθstands for a slanted angle of the fitting part. The slanted surface of the male metal fitting 2 of a segment A' is fitted in and wedged with a slanted fitting part of the female metal fitting 2 of a segment A so that they may be connected. A succeeding segment joint is fitted in a preassembled ring segment and aligned and fixed with a through bolt.
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