Direction correcting device for shield tunnelling machine

Details Direction correcting device for shield tunnelling machine Direction correcting device for shield tunnelling machine

1990-07-18

1991-10-29

Corbin, David H.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

299 1, 405184, E21D 906

Patent

active

050611208

ABSTRACT:
A direction correcting device for a shield tunnelling machine having a shield body provided with a head portion and a tail portion following the head portion corrects the direction of the head portion relative to the tail portion. The device includes three jacks, each jack having two connecting portions relatively displaced in the axial direction of the tail portion, and a connecting body for interconnecting the head portion and the tail portion to permit the head portion and the tail portion to swing and to prevent the head portion and the tail portion from relatively displacing in the axial direction of the tail portion. Each of the jacks is connected at one connecting portion to the head portion and connected at the other connecting portion to the tail portion. The jacks and the connecting body are disposed around the axis of the tail portion at angular intervals.

REFERENCES:
patent: 3854775 (1974-12-01), Anderson
patent: 4436448 (1984-03-01), Magnus et al.
patent: 4508390 (1985-04-01), Bessac

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