Shield tunneling with optional section and machine

Details Shield tunneling with optional section and machine Shield tunneling with optional section and machine

1989-09-29

1991-03-12

Britts, Ramon S.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Rotary cutter head with advance direction coincident or...

299 61, 405138, E21D 910

Patent

active

049987763

ABSTRACT:
A shield tunneling method of excavating a tunnel with an optional cross section by rotating a center cutter about an axis extending in the direction of propulsion and revolving a planetary cutter around the axis so as to excavate the region between the profile of excavation by the center cutter and the desired profile of excavation. A machine for practicing the method includes a center cutter supported by the body of the machine so as to be rotatable about an axis extending in the direction of propulsion of the body, a rotary body rotatable about the same axis as the center cutter, a planetary cutter supported by the rotary body so as to be movable radially of the rotary body, and operating device for moving the planetary cutter in the radial direction to permit the planetary cutter to revolve along a locus during the rotation of the rotary body so that the planetary cutter excavates the above-mentioned region.

REFERENCES:
patent: 4400036 (1983-08-01), Bradley
patent: 4844656 (1989-07-01), Babendererde et al.

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