Tunnel driving apparatus

Details Tunnel driving apparatus Tunnel driving apparatus

1981-08-28

1984-02-21

Purser, Ernest R.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

299 31, E21D 900

Patent

active

044326653

ABSTRACT:
Apparatus for use in driving tunnels or the like comprises a front drive shield composed, for example, of elongate cutter knives supported for longitudinal displacement on a frame. In order to control turning motion of the shield the shield is connected via hydraulic control rams to a rear abutment such as a follow-up ring structure. The rams are all inclined relative to the longitudinal axis of the apparatus. The rams are divided into two groups inclined in opposite directions and the rams of each group can be subjected collectively to pressure fluid to impart a corrective torque to the frame.

REFERENCES:
patent: 1355290 (1920-10-01), Updegraff
patent: 3301598 (1967-01-01), Pirrie et al.
patent: 3763657 (1973-10-01), Colson
patent: 3784257 (1974-01-01), Lauber et al.
patent: 3919851 (1975-11-01), Plourde
patent: 4118938 (1978-10-01), Unger et al.
patent: 4265565 (1981-05-01), Stuckmann et al.
patent: 4355924 (1982-10-01), Husemann et al.

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