In the recovery mannered null shielded tunnelling machine of the shielded

摘要

PROBLEM TO BE SOLVED: To provide a shield machine with the structure capable of easily recovering a screw conveyor.;SOLUTION: In this shield machine 1, a bulk head 12 is provided with a cylinder part 15 wherein the screw conveyor 2 is inserted freely to be drawn, and the cylinder part 15 is provided with a valve 17 for sealing an insert hole 16 after drawing the screw conveyor 2.;COPYRIGHT: (C)2004,JPO