Patent
1976-06-09
1977-09-13
Shapiro, Jacob
61 63, 61 722, E02B 1300
Patent
active
040473872
ABSTRACT:
A method of forming a plurality of horizontal barriers in situ at a preselected depth beneath the soil surface and in a plane substantially parallel to the soil surface so as to be coextensive with a desired area, the barriers being made of a thermoplastic material such as asphalt for example, and forming further barriers joined to the horizontal barriers and extending vertically or obliquely toward the soil surface in order to surround the above-mentioned area, thereby improving soil having a poor water retention property. The method further comprises the steps of filling up chambers in a plow moving in the soil with the barrier forming material in the liquid form, leaking the material out of the chambers through passages of a given gap, and spreading the formed film laterally uniform by an ironing portion connected with the plow near the passages so as to render the formed water barrier uniform in thickness and free from apertures.
REFERENCES:
patent: 3585804 (1971-06-01), Sramek
patent: 3917174 (1975-11-01), Hildebrandt et al.
Hirosawa Katsu
Ogaki Koji
Tamura Yukio
Kabushiki Kaisha Komatsu Seisakusho
Shapiro Jacob
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