Hydroinsulation Clay Barriers

Low pressure polymineral clay injection system animation.

Low Pressure Polymineral clay injection system
Ecomesh offer a low pressure polymineral clay injection system which is very effective in creating vertical and horizontal hydraulic barriers at several hundred metres depth on problematic sites.

The low pressure pumping of the naturally occurring clay using a track-mounted rig is non-obtrusive and obviates the need to excavate in contaminated ground, therefore insuring low environmental impact and hydraulic barrier installation costs.

The properties of the strata encountered in the initial drilling operation are taken into consideration in the selection of clay consistency and set times and allow flow rates, pumping pressure and flow paths to be predetermined prior to clay injection which is monitored by sophisticated computer software packages.

The polymineral clay is volume stable and fills all available void space in the strata encountered at the drill head. The drill head is removed upwards at 0.5 metre intervals to provide a continuous hydraulic clay barrier which extends to the surface.

This system of hydraulic clay barrier installation overcomes the depth limitations of current bentonite slurry walls and makes it possible to totally encapsulate landfill sites where leachate migration poses a risk to groundwater and surface water resources, for example.

The latest drilling technology is utilised and makes it possible to drill through a landfill mass of several hundred metres depth at a rate of 300mm per second to facilitate injection of the clay and installation of a hydraulic clay barrier beneath the landfill site.

This unique clay injection system has been successfully used to arrest leakage of water from canals and reservoirs avoiding excavation and disruption on the ground surface.

click here to see clay injection system animation.

Hydroinsulation Barrier

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Outflow of solution during grouting process

Site conditions after barrier creation