Permeation Grouting is a low pressure injection system used to improve the strength and reduce the permeability of granular soils.
Permeation Grouting is typically used for dam grouting applications and for groundwater control on tunneling projects. The method uses cement or chemical-based grouts and has the advantage that it produces no spoil.
Microfine cement grouting is an extension of permeation grouting, using finer grout capable of penetrating small voids in fissured rock and fine sands. The GIN method (grouting intensity number) is commonly used for Dam Grout Curtains to prevent under seepage below the dam alignment.