| 摘要 |
PROBLEM TO BE SOLVED: To provide RC segments for a sharply curved tunnel, which contribute to improvement in workability of the shield tunneling method and to reduction in construction cost. SOLUTION: In formation of a tunnel wall, the RC segments 10 for the sharply curved tunnel are circumferentially and axially combined with each other, and the adjacent segments 10 are connected to each other by bolts and nuts. Although a jack pressing force of a shield machine is applied to the tunnel wall at a sharply curved portion as a shearing force, anchors 26, 28 for fixing a joint main body 22 extend from the joint main body 22 in a radial direction of a segment main body 16, and further a front surface of the segment main body 16 is reinforced by reinforcing members 20a to 20e, whereby the RC segments 10 do not undergo breakage by the shearing force.
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