Bellevue, Perth, Western Australia
Environmental barriers in soils are used to intercept ground water flows: to inhibit the transmission of water and pollutants, to stabilise soil against erosion, to treat contaminated ground water or to collect and discharge ground water.
Barrier installation involves the removal of in-situ material to form a trench supported by a stabilising fluid, typically bentonite, polymer or bentonite cement. This supporting fluid is replaced in the backfilling operation, as with bentonite or polymer, or may be self hardening, eliminating the need for backfilling. To create a Soil Bentonite barrier the excavated soil is modified to create a suitable backfill. A Bentonite Cement barrier is created by the setting of the excavation fluid. Very low permeability barriers are created by both methods. Trench support by polymer is used when permeable backfills are required to create collector drains or reactive barriers.
A barrier created from interlocking Jet Grouted Columns offers a further installation technique and is particularly suited to the elimination of erosion of soils in tidal situations.
The range of methods offered by Menard Bachy:
Objectives:
Slurry Cut-off Barrier, Tempe Tip, Sydney, New South Wales
Port Bonython, South Australia
