Grout Trench Cut-off Walls
Mainmark offers grout trench cut-off walls to contain contamination
Groundwater is an important water source but it can be susceptible to pollutants like refuse leachates, gases, chemicals, oil or petrol. These substances can leach into the groundwater over time and render it dangerous for both humans and animals. It can be difficult, but not impossible, to mitigate or stop the migration of subsurface contaminants. One of the first and most important steps is to cutoff the source of the contamination and impacted water from other water sources. Mainmark’s grout trench cut-off walls (or “grout curtain”, slurry curtain”, “slurry wall”, “slurry trench wall”, “slurry cutoff wall”) are used to control and contain leachates, gases and ground water. This method of containment is a cost-effective solution with a long-term effective life. It has low maintenance costs and a very low impact on the environment. This makes it perfect for Australian conditions where environmental considerations are paramount. Mainmark is one of the few companies in Australia that has the full equipment and the expertise to construct grout cut-off walls using the slurry trench installation method. This method is fast and reliable, resulting in cut-off walls that prevent contaminated groundwater from passing through. We specialise in grout trench cut-off walls:
- at sites where contaminated groundwater needs to be contained
- at waste sites, tips and dumps to contain contaminated groundwater
- at construction sites to allow the installation of sheet piling without vibration
- at dams and levees to contain storage or contaminated water.
Solving your contamination issues:
Mining
With ageing infrastructure and mine tailings dam failures, emphasis is being placed on ensuring that clay core dam integrity is maintained. Grout trench cut-off walls represent a cost-effective remediation technology for the treatment of leaks within the dam core, body or dam toe. Where grout trench cut-off walls are used in this manner, they contain dam tailings or mine waste. The cut-off walls are normally taken down to an impermeable stratum or at least half a metre below the greatest depth of dam clay core or toe, subject to geotechnical conditions.
Site re-development
With growing urban population and ever increasing inner city development, sites previously occupied by industrial facilities are now being re-developed for residential and other community uses. Many sites come with ground contamination issues which need to be managed. Controlling contaminated groundwater and preventing it from seeping into uncontaminated sites is critical. Grout trench cut-off walls achieve fast containment and are reliable over the long term.
Dumps and landfills
With growing urban population, dumps and land fill sites are often filled to capacity, with many impacted by ageing liners, which makes them susceptible to breaches in their containment. Grout trench cut-off walls can be used to control migration of contaminated leachates from industrial dumps or landfill sites. They can be installed quickly and on slopes, and do not require temporary excavation support, making them a low-cost, effective solution.
Features |
Benefits |
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|---|---|---|
| Cost effective | The relatively low cost makes grout cut-off walls suitable for almost any situation |
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| Long lasting | Grout cut-off walls have been used as a key containment solution for more than 50 years |
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| Fast to implement | Mainmark grout cut-off walls help contain contaminated water faster; preventing and limiting spreading |
