Shield tunneling apparatus

Details Shield tunneling apparatus Shield tunneling apparatus

1984-03-30

1986-11-25

Husar, Cornelius J.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

405141, 405184, 175 55, 299 56, E21D 906, E02F 510

Patent

active

046246053

ABSTRACT:
Method for thrusting a shield for use in tunneling includes the steps of causing a rotary head, provided at the front portion of a shield body, an eccentric motion so that earth, soil or sand covering the front of the shield is pressed away radially of the shield, and exerting a thrust on the shield body during the eccentric motion of said rotary head. Apparatus for carrying out the method includes a driven crank shaft or a driven eccentric straight shaft, a conical or frustoconical rotary head supported rotatably by the crank or eccentric straight shaft, conveyor for discharging mined material backwardly, and hydraulic jacks for imparting a thrust to the shield body.

REFERENCES:
patent: 347813 (1986-08-01), Legg
patent: 1001903 (1911-08-01), Temple
patent: 1179342 (1916-04-01), Wittich
patent: 2874936 (1959-02-01), Gonzales
patent: 3429390 (1969-02-01), Bennett
patent: 3830545 (1974-08-01), Sugden
patent: 3926267 (1975-12-01), Svirchevsky et al.
patent: 4311411 (1982-01-01), Akesaka et al.
patent: 4403890 (1983-09-01), Miyanagi et al.
patent: 4406498 (1983-09-01), Akasaka
patent: 4494799 (1985-01-01), Snyder

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