Tunnel constructing

Details Tunnel constructing Tunnel constructing

1982-09-28

1985-05-14

Husar, Cornelius J.

Hydraulic and earth engineering

Temperature modification or control of earthen formation

405132, 405138, 175 17, 175 53, 175 62, E02D 1914, E21D 106, E21D 900

Patent

active

045168784

ABSTRACT:
Tunnels are constructed by freezing soil and removing frozen soil between starting and end shafts of the tunnels. Tunnels are driven in an uncomplicated manner in rapidly changing soils without auxiliary construction means. A hole is bored in or near the planned axis of the intended tunnel between starting and end shafts. A soil freezing work pipe is inserted into the hole. The pipe is cooled by a cooling agent. The soil freezing work pipe continues to be cooled until an ice and frozen soil mass has formed around the work pipe, which frozen mass has a diameter which is larger than that of the planned tunnel. Frozen soil is subsequently excavated, leaving a frozen soil lining, which is immediately supported by a primary support lining or a permanent lining.

REFERENCES:
patent: 340162 (1886-04-01), Sooysmith
patent: 713519 (1902-11-01), Sooysmith
patent: 713521 (1902-11-01), Sooysmith
patent: 736308 (1903-08-01), Sooysmith
patent: 2154233 (1939-04-01), Donaldson
patent: 3183675 (1965-05-01), Schroeder
patent: 3491843 (1970-01-01), Rodriguez
patent: 3528252 (1970-09-01), Gail
patent: 3720065 (1973-03-01), Sherard
patent: 3726095 (1973-04-01), Ross

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