E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
262/54
E21D 9/10 (2006.01) E21D 9/08 (2006.01)
Patent
CA 1331025
ABSTRACT OF THE DISCLOSURE 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 comprises 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 means 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.
613988
Asahi Toshinori
Chida Shohei
Fukunaga Taizou
Iwasa Seiji
Kozaki Masami
Kabushiki Kaisha Kobe Seiko Sho
Nippon Hyumukan Kabushiki Kaisha
Nittoku Kensetsu Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
Zaidan Hohjin Doboku Kenkyu Center
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