To facilitate execution by reducing the number of divisions of a segment as much as possible and facilitate joining work and centering work of both conduits and further maintain water-cut off performance over a long period.
In a combined method of propulsion and shielding, a propulsive process is a process of mounting a propulsive force receiving ring 13 at a rear end of an assembling space 9 of a shield machine 5 and fitting the propellant pipe 20 to the rear end of the propulsive force receiving ring 13 and further adding propulsive force to the shield machine 5 from the propellant pipe 20 through the propulsive force receiving ring 13, and a shielding process comprises a step of connecting a head segment cylinder 35 with the propellant pipe 20 and a step of pushing and installing an interior pipe 40 into the segment cylinder 35 with a predetermined interval S from a vertical hole 2 and connecting the head interior pipe 40 with the propellant pipe 20, so that the steel segment 35 is easily connected with the head propellant pipe 20.
NOBE OSAMU
Higashio Masahiro
Torii Kazuhisa
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