The Task
To supply and install a synthetic capping geomembrane including a
temporary ballast of waste tyres for protect against wind uplift. Also
the supply and installation of a base liner for a surface water
collection lagoon.
The Solution
F.L.I. Environmental proposed the use of a 1.0mm thickness Linear Low
Density Polyethylene (LLDPE) geomembrane for its durability, chemical
resistance and flexibility to accommodate future subgrade movements
that occur as a result of the landfill settlement.
The cap geomembrane was fully welded and tested to allow for under
liner gas collection and over liner surface water control. A 2.0mm
thickness HDPE liner was selected for the surface water collection
lagoon to provide general long-term durability.
General
A synthetic lining material is generally deployed onto a smooth and
firm prepared subgrade free from sudden change of grade or any sharp
material that could cause damage. A spreader beam is used to lift and
deploy the rolls of liner and this beam is usually slung from a
suitable excavator or loader. Individual panels of material are either
installed with the necessary overlap or, as is the case with most
plastic geomembranes, welded together. |
Bench Installation
Geomembrane Capping
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