Backfilled Vent Detail

In certain circumstances gases can accumulate under a geomembrane and cause uplift. A gas venting system can prevent damage to the liner when uplift is predicted. A geo-net or geotextile vent layer is provided under the liner and up the slopes. At the top of the slopes a vent is provided to allow the gas to escape to atmosphere. The detail in this drawing shows a typical gas vent at the top of a slope in a backfilled geomembrane. A drawing for an exposed geomembrane vent is also available.

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Backfilled Vent Detail

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Backfilled Vent Detail

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