Shield tunneling machine

Details Shield tunneling machine Shield tunneling machine

E - Fixed Constructions

02

F

262/54

E02F 3/24 (2006.01) E21D 9/06 (2006.01) E21D 9/08 (2006.01)

Patent

CA 1234587

ABSTRACT OF DISCLOSURE A shield tunneling machine comprises a shield body provided with a tubular head portion and a tubular tail portion disposed behind the head portion. The head portion and tail portion are interconnected by a plurality of thrusting jacks for moving both portions to and away from each other. In the shield body are arranged a cutter head for excavating the face, a mechanism for rotating the cutter head and a plurality of position-maintaining mechanisms making the natural ground a reaction body to advance the shield body and having press bodies capable of projecting outward of the shield body. The machine, during the excavation has the head portion advanced relative to the tail portion by the thrusting jack and the tail portion next attracted to the head portion by the thrusting jack.

498907

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