Boart Longyear

Jet Grouting Systems

Jet grouting is performed with either single, double or triple tube jet grouting systems.  All components of the system are designed to withstand high injection pressures.  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.