Jet grouting is a foundation process injecting cement grout under very high pressure into the soil through nozzles that create a jet effect. The jet effect is used to disrupt the soil and mix the injected grout with the soil in place. There are three Jet grouting methods that differ in the number of fluids injected simultaneously.
The monojet is an injection of cement grout, the double jet is an injection of cement grout and air and the tri-jet is an injection of grout cement, air and water.
Parameters
On-site instrumentation measures and records in a simple, reliable and precise way:
- Depth
- Moving speed
- Distance of the step
- Station time
- Rotation speed
- Angle (sector) of treatment
- Rotation torque
- Pressure on the tool
- Pressure and flow of the grout
- Pressure and flow of the water
- Pressure and flow of the air
- Inclination X and Y
- Deviation of the column
Devices
Device suitable for measuring and recording parameters for jet grouting:
- DIALOG MX4
Sensors
The recording of various parameters and control is ensured by specific sensors:
- P82 for depth
- VR28I for rotation speed
- C16 400 for thrust, restraint and torque
- C16 400 associated with RHTC16 for pump blow
- C16 M associated with SP 100H for grout pressure, flow rate and calculated grout volume
- AT50 C for flow and air pressure
- TIGOR for deviation
- ANTOISE for centimeter GPS positioning
Controls
Lifting
Rotation (option)
Technical diagram and results layout
Hover the diagram for more details