Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1983-10-12
1984-12-04
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
175 62, 405248, F16L 102
Patent
active
044861249
ABSTRACT:
A method and apparatus for laying a pipeline in the underground. First, a pilot pipeline of small diameter is laid in the underground between a departure pit and an arrival pit. A cutter head having a cutter drum mounted thereto is attached to the trailing end of the pilot pipeline. By rotating the cutter drum, earth and sand is excavated and taken in inside the cutter drum where earth and sand is converted into a slurry state by injecting therein water through a water supply pipe mounted to the pilot pipeline. The slurried earth and sand is then discharged through a slurry discharge pipe mounted to the pilot pipeline to a tank provided in the arrival pit. By actuating a propulsion jack installed in the departure pit, the cutter head is propelled into the underground and then a pipe to be laid is connected to the rear end of the cutter head. By repeating the excavation and the propulsion steps, a pipeline of a larger diameter is laid in the underground.
REFERENCES:
patent: 3589135 (1971-06-01), Ede
patent: 3608317 (1971-09-01), Landau
patent: 3845828 (1974-11-01), Taylor et al.
patent: 3916634 (1975-11-01), Woodruff
patent: 4020641 (1977-05-01), Takada
patent: 4024721 (1977-05-01), Takada
patent: 4091631 (1978-05-01), Cherrington
patent: 4226477 (1980-10-01), Capoccia
patent: 4403890 (1983-09-01), Miyanagi et al.
Saito Hiroshi
Shiotsubo Masami
Yamamuro Toshikazu
Kabushiki Kaisha Komatsu Seisakusho
Taylor Dennis L.
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