Jet Grouting uses ultra-high pressure (~6,000 psi) injection of cement grout to cut and mix soil in-situ. Grout is fed, by a specialized high pressure jet pump, through a rotating drill pipe and forced out laterally through small jet ports at the bottom of the drill pipe. Jet Grout columns are typically formed from the bottom up providing a column of fully mixed soil.
Jet Grouting is commonly used in conjunction with Soil Mixing or Vertical Barrier walls to provide a continuous barrier or homogeneous soil-mixed monolith in areas with difficult or limited surface access, subsurface obstructions, or sensitive utility locations. Jet Grouting is also particularly effective in structural underpinning and foundation rehabilitation.