• Soil Stabilization
• Excavation Support Systems
• Structural Underpinning
• Seepage Barrier/Cutoff Walls
• Environmental Remediation

• Predetermined quantity of stabilizer to be injected per unit volume of in-situ soil.
• Final strength of the stabilized soil can be predetermined.
• Permeability of the stabilized soil can be predetermined.
• Estimated as a lump sum vs. unit price and contingency for other grouting methods.

JET GROUTING PROCESS

Jet I-Single Fluid:  This system is the most simple, as well as the preferred method of most qualified specialty contractors for projects involving critical or sensitive structures. The single fluid referred to in this method is neat cement grout. The neat cement grout is injected through a small nozzle at high pressure and mixes with the in-situ soil. This method produces the most homogeneous soil-cement element with the highest strength and the least amount of grout spoil return.

Jet 2-Double Fluid:  The two fluids referred to in this method are neat cement grout and air. The neat cement grout is injected at high pressure and is aided by a cone of compressed air, which shrouds the grout injection. The air reduces the friction loss allowing the cement grout to travel further from the injection point thereby producing greater column diameters. However, the presence of the air reduces the strength of the column as compared to the single fluid method, and produces more spoil return.

Jet 3-Triple Fluid:  The three fluids referred to in this method are neat cement grout, air and water. Unlike Jet 1 and Jet 2, water is injected at high pressure and is aided by a cone of compressed air, which shrouds the water injection. This process produces an air lifting effect which evacuates the soil from within the intended column diameter. The grout is injected at a lower pressure through a separate nozzle below the water and air nozzles to fill the void created by the air lifting process. Jet 3 is a soil replacement method, not an in-situ mixing method. It produces substantially more spoil return than the Jet 1 and Jet 2 methods.