TUNNEL BORING MACHINE, AND METHOD FOR PREVENTING OR REDUCING DISABLEMENT OF TUNNEL BORING MACHINE

摘要

The purpose of the invention is to inhibit obstruction of the smooth progress of a tunneling machine by way of ground improvement material entering and solidifying in a gap formed between the tunneling machine and the ground in the outer circumference of the tunneling machine. A tunneling machine includes: a cutter head portion having a ground improvement material injection nozzle for injecting ground improvement material, the cutter head being rotatably provided on the distal end in the direction of tunneling; and a pack material supplying unit for supplying pack material to the exterior of the tunneling machine in the radially outward direction.