| 摘要 |
PROBLEM TO BE SOLVED: To provide an arch center, performing efficient secondary lining work, not requiring alteration of a moving mechanism whether the primary lining is a concrete segment or a steel segment. SOLUTION: This arch center 1 for a tunnel includes: a gantry 2 extending in the axial direction in the tunnel T and supported on an inner peripheral wall T2 of the tunnel T to be movable in the axial direction; and a form 3 supported by the gantry 2 to form an injection space S for lining concrete in a space up to the inner peripheral wall T1. Moving mechanisms 5, 6 movably supporting the gantry 2 on the inner peripheral wall T2 are provided only on the one half part of the gantry 2 outside the form 3. COPYRIGHT: (C)2011,JPO&INPIT
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