Remediation Technologies / Geomembrane Walls

For prevention of gas migration, particularly above the ground water table, a secondary barrier is placed in the Slurry Wall. This typically comprises a continuous geomembrane liner installed in-situ before the slurry sets.
Construction.

Construction of the wall proceeds under the temporary support of a bentonite slurry or self-hardening bentonite/cement slurry according to wall depth and excavation technique.

Dependent on the wall depth, the geomembrane is lowered into the wall as either a continuous sheet or roll, or in interlocking panels for deeper walls. To complete the composite wall self-hardening bentonite/cement slurry encapsulates the flexible liner.