Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – By means advancing along terrain and guiding pipe or cable...
Patent
1984-11-07
1987-05-19
Corbin, David H.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
By means advancing along terrain and guiding pipe or cable...
405 38, 405179, E02B 1300, E02F 510
Patent
active
046663371
ABSTRACT:
There is provided a method for subterranean insulation of an area of the ground against water seepage therethrough. The method comprises the steps of forming a first trench of a predetermined depth from the surface of the ground and widening the trench by sequentially forming additional trenches along one side of the previously formed trench while simultaneously applying a water repellent layer substantially along the bottom surface of the previous formed trench and while at least partly covering the layer with earth removed from the additional trench being formed until the entire area of the ground is insulated. The invention also provided a device for carrying out this method.
REFERENCES:
patent: 1803838 (1931-05-01), Carpenter
patent: 2158952 (1939-05-01), Timberlake
patent: 3405528 (1968-10-01), Hansen et al.
patent: 3590588 (1971-07-01), Draper
patent: 3618329 (1971-11-01), Hanson
patent: 3874182 (1975-04-01), Potter et al.
patent: 4073152 (1978-02-01), Kishitani et al.
patent: 4379655 (1983-04-01), Brost et al.
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