Cutter How to replace the tunnel boring machine and tunnel excavation method and tunnel boring machine

摘要

PROBLEM TO BE SOLVED: To facilitate the replacement work for roller cutters within a short period of time, lighten the burden imposed on a worker to promote safety and, at the same time, to promote work efficiency in a cutter replacement method for a tunnel excavator, a tunnel excavation method, and the tunnel excavator.;SOLUTION: Movable blocks 27a-27d having roller cutters 24a-24d borne by cutter spokes 23a-23d of a cutter head 13 in a movable manner, at the same time, they are connected with connecting links 30, and while gate mechanisms 33a-33d are put on the ends of the cutter spokes 23a-23d, a roller cutter storage box 34 is selectively connected to the ends of the cutter spokes 23a-23d opposed to an excavator main body 11 at a specific rotational angle position of the cutter head 13 in a detachable manner.;COPYRIGHT: (C)2001,JPO