Method and apparatus for tunnelling

Details Method and apparatus for tunnelling Method and apparatus for tunnelling

1990-04-16

1992-04-14

Corbin, David H.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

37191A, 299 82, 405140, E21D 910, E21D 1110

Patent

active

051042606

ABSTRACT:
The method for boring a tunnel consists in placing an excavation tool at a point of the extrados of the tunnel and in excavating a cavity by imparting the tool an advancement movement having divergent direction with respect to the axis of the tunnel. While the cavity is being filled with concrete, a further cavity is excavated in another point of the extrados and is then also filled with concrete. These operations are repeated until a plurality of voussoirs is obtained which are arranged adjacent to one another along the extrados and give rise to a frustum-shaped vault. The soil inside the vault is then excavated for a depth which is smaller than the axial extension of the vault itself, and a subsequent vault is formed having a narrower initial portion internal to the wider terminal portion of the previously executed vault.

REFERENCES:
patent: 839856 (1907-01-01), Keays
patent: 1242217 (1917-10-01), McAlpine
patent: 1777439 (1930-10-01), Lamont
patent: 2182477 (1939-12-01), Hollingsworth
patent: 2939692 (1960-06-01), Russell et al.
patent: 3597929 (1971-08-01), Bodine
patent: 4666336 (1987-05-01), Murakami et al.

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