Apparatus for and a method of constructing a tunnel

Details Apparatus for and a method of constructing a tunnel Apparatus for and a method of constructing a tunnel

1975-07-02

1977-08-23

Shapiro, Jacob

Mining or in situ disintegration of hard material

Processes

Forming blocks

61 45D, 299 31, E01G 302

Patent

active

040431371

ABSTRACT:
Apparatus for constructing an underground tunnel employs a drive shield composed of elongate drifting cutters disposed side-by-side in a circular configuration around a support frame. Hydraulic rams serve to advance the cutters and to shift up the frame when all the cutters have been advanced. The cutters have rear end portions which engage on a follow-up ring behind the drive shield.
A platform is supported by the frame within the shield and carries some form of working appliance for detaching and removing the debris material. The platform also carries a rotatable concrete spraying device which serves to seal and secure the tunnel wall exposed when the follow-up ring is shifted up to the shield.

REFERENCES:
patent: 3381479 (1968-05-01), Curzio
patent: 3404920 (1968-10-01), Tabor
patent: 3650116 (1972-03-01), Cunningham
patent: 3870368 (1975-03-01), Winberg et al.
patent: 3950956 (1976-04-01), Lobbe

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