Techniques

Permeation Grouting

Permeation grouting is a low pressure injection system used in granular soils to improve strength and/or reduce the permeability.
The method is carried out using cement or chemical based grouts and has the advantage of no spoil production.
Typical applications include dam grouting, groundwater control in tunnels.

More Information....

Microfine Grouting

Microfine cement grouting extends the application of permeation grouting and is generally carried out in fissured rock and fine sands having the ability of being able to penetrate fine voids.
Treatment results in improved materials with low permeability and compressive strengths of greater than 3MPa.
The method can be applied in restricted access locations and has the benefit of virtually zero spoil production.
Typical applications are for underpinning and shoring for basement construction below existing foundations and seepage control

More Information....

"Soilfrac" Compensation Grouting

Soilfrac Compensation Grouting uses the propagation of fractures of grout in the soil fabric to consolidate the soil and potentially carry out a controlled re-levelling of overlying structures.
Sequential injections of low volumes of cement grout develops fractures in the soil fabric up to 10mm to 20mm thick, the fractures are filled with the grout and repeated fracturing consolidates the soil.
The method allows buildings, structures and services to protected during shallow tunnelling or nearby excavation works as well as lifting structures back to pre-existing levels where settlement has occurred.

More Information....