Driving process of enlarged tunnel

Details Driving process of enlarged tunnel Driving process of enlarged tunnel

1983-12-02

1986-02-11

Taylor, Dennis L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Lining

405138, 405141, 405146, E21D 1100

Patent

active

045696160

ABSTRACT:
A driving process for enlarging a tunnel wherein a primary shield machine is driven along an ordinary diametrical tunnel to a predetermined region to be enlarged. An enlarged starting base is formed in the rear of the primary shield machine. An enlarging shield machine is assembled in the enlarged base. Thereafter, the primary shield machine and the enlarging shield machine are both driven forward along the predetermined region of enlargement to construct an enlarged tunnel.

REFERENCES:
patent: 167442 (1875-09-01), Dowd
patent: 1278932 (1918-09-01), Hughes
patent: 2743087 (1956-04-01), Layne et al.
patent: 3523426 (1970-08-01), Lauber

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