Excavation method and apparatus for accessing underground pipes

Details Excavation method and apparatus for accessing underground pipes Excavation method and apparatus for accessing underground pipes

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

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