CONSTRUCTING METHOD OF TEMPORARY TRACK FOR TUNNELING WORK, AND SLEEPERS FOR TEMPORARY TRACK USED THEREFOR

摘要

PROBLEM TO BE SOLVED: To enlarge an inner space height so that a worker can walk through easily and that a drain of a large diameter can be brought in immediately after primary lining and thereby to make working efficient. ;SOLUTION: In parallel with excavation of a tunnel by a shield machine S, sleepers 3 to be used on the occasion of primary lining are provided inside primary lining segments installed completely, at height positions enabling parallel running of following trucks 6 brought to the rear side of the shield machine S and of a carrying vehicle running in the tunnel, while rails 1 whereon the following trucks 6 and the carrying vehicle run are laid therein. On the other hand, the sleepers 3 used on the occasion of the primary lining are removed sequentially from places where the following trucks 6 advancing with the shield machine S have ended passing, on the rear side of the laid rails, and sleepers 5 to be used on the occasion of secondary lining are provided at height positions lower relatively than the sleepers 3, while the rails 1 whereon the carrying vehicle runs are relaid.;COPYRIGHT: (C)1999,JPO