Drainage method and strap draining materials therefor

E - Fixed Constructions – 02 – B

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E02B 11/00 (2006.01) E02D 31/02 (2006.01)

Patent

CA 2229758

A drainage method comprises the step of absorbing liquid from soil, by capillary action, into a plurality of drain-collecting slots provided on at least one surface of a strap-like drain material embedded in the soil. The slots include a plurality of notches in the surface of the drain material that are sufficiently small to create a capillary effect and that extend to the slots which are larger than the notches. The slots are arranged in a spaced-apart fashion across a width of the drain material and extend along its length. The notches correspond to the plurality of slots; the notches extending from the slots to a surface of the drain material. Each notch is sized such that the notch is capable of creating a capillary action and is adapted to draw liquid from outside into the slot corresponding to the notch.

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