Forming a passageway through the ground

Details Forming a passageway through the ground Forming a passageway through the ground

1990-11-29

1992-07-14

Reese, Randolph A.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

405149, E21D 904

Patent

active

051297604

ABSTRACT:
A method of forming a passageway (P) through the ground by inserting into the ground a structure (1) comprising a superstructure (3) and a substructure (2). The superstructure (3) is inserted into position in the ground, and the substructure (2) is urged into the ground beneath the superstructure (3), the ground being excavated as the substructure is inserted so as to form the passageway (P) bounded by the superstructure and the substructure.

REFERENCES:
patent: 440576 (1890-11-01), Radcliffe
patent: 902973 (1908-11-01), Knudsen
patent: 2021313 (1935-11-01), Kotrbaty
patent: 3833960 (1974-09-01), Herth et al.
patent: 3999394 (1976-12-01), Eberhardt
patent: 4009579 (1977-03-01), Patzner
patent: 4365913 (1982-12-01), Bonvoisin
patent: 4929123 (1990-05-01), Lunardi

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