| 摘要 |
PROBLEM TO BE SOLVED: To provide a tunnel segment which has a water cutoff groove formed therein without damaging the cross sectional performance of a segment body, is good in accuracy of form, low in manufacturing cost, and high in load bearing ability. SOLUTION: The tunnel segments 10 each have a pair of axial connection faces 12E orthogonal to a tunnel axial direction, and a pair of circumferential connection faces orthogonal to a tunnel circumferential direction. The tunnel segments 10 are arranged in the tunnel circumferential direction and axial direction, and connected to each other via the axial connection faces 12E and the circumferential connection faces, to thereby form a tunnel lining body. Herein the segment has a plurality of circumferential water cutoff groove forming plates 20, 22 arranged on the axial connection faces 12E across a predetermined interval in a radial direction, and therefore the circumferential water cutoff groove 30 extending along the tunnel circumferential direction is formed. COPYRIGHT: (C)2009,JPO&INPIT
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