UNDERGROUND JOINT TYPE TUNNEL EXCAVATOR AND TUNNEL JOINT METHOD

摘要

PROBLEM TO BE SOLVED: To improve the reliability in work by definitely carrying out water stop when jointing a new tunnel to an existing tunnel in an underground joint tunnel excavator and tunnel jointing method. ;SOLUTION: A cutting ring 43 comprising an outer ring 44 and an inner ring 45 which are freely movable relatively is installed to the front drum 11, the inner ring 45 is made rotatable as one body together with the cutter head 17 by using a cutter revolving motor 27, many cutter bits 50 are installed to the front end portion of the inner ring 45, first, second and third discharge hole 79, 80 and 81 are formed at the tip portion of the outer ring 44, a chemical filling passage 77 is connected to the first discharge outlet 79 and second discharge outlet 80, and the tip portion of a filler injecting path 78 is connected to a third discharge outlet 81.;COPYRIGHT: (C)2001,JPO