| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite segment which has a reinforcement structure formed of a steel material and a concrete and capable of transmitting a force and in which a dimensional accuracy on the end surface of the segment is secured without correcting the shape. SOLUTION: This composite segment 1 is formed by filling the inside of a steel shell with the concrete 8. The steel shell comprises two or more girders 7 extending in the circumferential direction of a tunnel and arranged parallel to each other in the axial direction of the tunnel: structural members 4a-4d of L-shape in cross section forming a corner part formed by the outer or inner peripheral surface of the segment and the axial end surface of the tunnel; and bridging members 15a fixed to the girder 7 disposed at the axial outermost position of the tunnel and the structural members 4a-4d positioned on the outside of the main girder 7 through an elastic body washer with bolts or a drill screw, and connecting the girder 7 to the structural members 4a-4d. COPYRIGHT: (C)2008,JPO&INPIT
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