TUNNEL BORING MACHINE AND TUNNEL BORING METHOD

摘要

PROBLEM TO BE SOLVED: To stabilize a cutting face by equalizing earth pressure in a chamber.SOLUTION: Cutter bits 53 and 54 are provided in an outward protruded state at a predetermined interval in an axial direction of a horizontal rotating shaft on the periphery of the horizontal rotating shaft; excavating cutters 5, which is disposed in such a manner that an axial direction is directed in a width direction of a tunnel, are provided in a plurality of tires in a vertical direction along the front of an boring machine body 2; a spout for a mud making material for plastically fluidizing excavated sediment is provided near the excavating cutter 5; and a puddle screw 7 for plastically fluidizing the excavated sediment by agitating the excavated sediment is provided in the chamber R1 in the rear of the excavating cutter 5 in such a manner that a screw rotating shaft (the central axis O2 of the screw) of the puddle screw is brought in parallel with a rotating shaft (the central axis O1 of the cutter) of the excavating cutter 5.