Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,...
Patent
1995-04-04
1997-02-11
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
405173, 405161, 37364, F16L 100
Patent
active
056013833
ABSTRACT:
A method consisting in forming a preliminary excavation along the pipe and in then digging, starting from the bottom of the preliminary excavation, two lateral trenches that are adjacent to the sides of the pipe, converge downwardly, and go deeper than the level set for the final excavation bed that lies below the pipe, so as to form respective lateral collection channels; and in removing, by cutting, the wall that separates the trenches in the region below the pipe, dumping the corresponding residual material into the lateral collection channels. The invention also relates to an apparatus, of the integral type or composed of dedicated units, for digging the lateral trenches and/or for cutting away the wall that lies below the pipe.
REFERENCES:
patent: 3238734 (1966-03-01), Rhodes
patent: 3429132 (1969-02-01), Martin
patent: 3857250 (1974-12-01), Di Tella et al.
patent: 4395158 (1983-07-01), Brooks
patent: 4409747 (1983-10-01), Kaldenbach
patent: 4643613 (1987-02-01), Durner
Goriziane S.p.A.
Josif Albert
Modiano Guido
Taylor Dennis L.
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