Earthen liner with clay seam cover

Details Earthen liner with clay seam cover Earthen liner with clay seam cover

E - Fixed Constructions

02

D

E02D 31/00 (2006.01) D06H 5/00 (2006.01)

Patent

CA 2394628

A geosynthetic liner (10) may be formed of sheets (12) of substantially liquid impermeable synthetic material such as high density polyethylene. The adjacent edges (27, 29) of adjacent sheets (12) may be lapped over one another to form a lapped joint (28). The lapped joint (28) may be covered by a relatively narrow seam cover (22) which seals the region between the two sheets (12). The cover (22) may be formed of a geomembrane layer (26) over a clay layer (24). The clay layer (24) may be formed of particles of bentonite which are adhesively secured to the geomembrane layer (26). Thus, the geomembrane liner seam may be sealed by simply unrolling the cover (22) over the lapped joint (28) and covering the sheets (12) and the cover (22) with a layer of overburden (14).

La présente invention concerne une garniture en géosynthétique (10) qui peut être formée de feuilles (12) d'un matériau sensiblement imperméable aux liquides tel que le polyéthylène haute densité. Les bords voisins (27, 29) de deux feuilles voisines (12) peuvent se chevaucher de façon à former un joint couvrant (28) qui peut être couvert d'une bande de couverture relativement étroite (22) créant l'étanchéité de la zone intermédiaire entre les deux feuilles. Cette bande de couverture peut être réalisée à base d'une couche de membrane géotextile (26) recouvrant une couche d'argile (24). Cette couche d'argile (24) peut être faite de particules de bentonite adhérant à la couche de membrane géotextile (26). Ainsi, pour l'étanchéité de la couche de garniture en membrane géotextile, il suffit simplement de dérouler la bande de couverture (22) au-dessus du joint couvrant (28), puis de recouvrir les feuilles (12) et la bande de couverture (22) d'une couche de terre de couverture (14).

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