Jet Grouting System Jet Grouting or High Pressure Injection is a ground stabilization technique as well as a sealing method used in soil conditions ranging from loose sediment up to soft rock structures.
In the Jet Grouting process a cement suspension is injected at pressures of 100-600 bar (1,450-8,700 psi) through the jet grouting tooling and into the soil in the drilled hole. The cement suspension mixes with the surrounding soil as the Jet Grouting tool string is slowly rotated and retracted from the hole. The result is a subsurface grout column.
Jet Grouting tools are designed to withstand high injection pressures using proper materials as well as specialized seals between the rod joints. Above the drill bit is the drill string monitor which houses the injection nozzles as well as the automatic valve which controls flushing and injection. The automatic valve allows regular low pressure flushing through the drill bit while the hole is being drilled. Once high pressure fluids are injected into the drill string the automatic valve closes directing the high pressure flow out through special injection nozzles.
Jet grouting is performed with either single, double or triple tube jet grouting systems.
 | Jet Grouting Systems
Both Single and double tube jet grouting systems are available. Among other benefits, the double tube system allows for increased penetration and larger diameters. |  | Jet Grouting Flushing Heads
Jet grouting flushing heads are designed for long and reliable service under extremely difficult operating conditions. | | | | | |  | Jet Grouting Rods
Jet grouting rods are specifically designed, as are their components to withstand the damage from the abrasive grouts and harsh operating conditions. |  | Jet Grouting Bits
Boart LongyearTM offers a wide selection of rotary bits to work in a variety of ground conditions. All feature tungsten carbide tipped cutting wings to efficiently drill to depth. | | | | | |  | | | |
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