Specification requirements and engineering practices before composite geomembrane laying

   I. Material preparation: The performance indicators of the purchased composite geomembrane meet the technical standard of composite geomembrane: GB/T17642-2008.

  2. Basic construction conditions: Check and confirm the foundation support layer has laid the condition of composite geomembrane, the base surface should be dry (moisture content should be controlled below fifteen percent) compaction (dense uniform compaction coefficient 0.95 or higher) surface smooth, no cracks, no mud, no sub-sag, slope is uniform, the straightness should be gradual changes inside the membrane, Yin and Yang Angle of smooth, Sweep the geomembrane laying surface without sharp objects, stones, wire, wood sticks, etc., the sod within the impermeable range, the roots to clean, and spray the weeds.