TUNNEL BORING MACHINE AND TUNNEL CONSTRUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a tunnel boring machine and a tunnel construction method capable of preventing the excessive uptake of refuse in an unstable natural ground and also quickly timbering the natural ground. SOLUTION: In this tunnel boring machine 1, at least a roof support 3 of the roof support 3 and a side support 4 is provided with a prescribed space from a cutter head in the rear of the cutter head 2 comprising two or more cutters 21 and a scraper 23 for collecting the excavated soil excavated by cutters 22 provided on a circumferential part 2a. At least the roof support 3 is provided to be movable up to just after a gauge cutter 22 provided on the circumferential part 2a of the cutter head 2.