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JETGROUTING

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JETGROUTING is a foundation process that consists in injecting cement slurry at very high pressures into the ground through nozzles that create a jet effect. The jet effect is used to break up the ground and to mix the injected slurry with the soil in situ. There are three Jetgrouting methods that are identified by the number of fluids injected simultaneously.
The mono-jet is a cement slurry injection; the bi-jet is a cement slurry + air injection and the tri-jet is a cement slurry + air + water injection.



TYPES OF MEASUREMENT

The instrumentation on the job site simply, reliably and accurately controls, measures and records :

  • Depth.
  • Penetration rate.
  • Drilling rate.
  • Station time.
  • Rotation speed.
  • Treatment angle (sector).
  • Torque.
  • Thrust pressure.
  • Slurry pressure and flow rate.
  • Water pressure and flow rate.
  • Air pressure and flow rate
  • X and Y inclination.
  • Column deviation.
     


THE INSTRUMENTS

The  LT3 and the CL88 are instruments for use in the Jetgrouting process; they are constructed of particularly robust materials and protected by rustproof metal housings
 
 


THE SENSORS

Specific sensors are used to record the different parameters : the  F82  and the   D907 for depth, the VR28N for rotation speed, the IA1620 for inclination, the C16400 for thrust pressure, the C16M for water pressure and flow rate, the C16M50 and the SP100H for slurry pressure, flow rate and volume, the AT50 for air flow rate and pressure and the TIGOR for column deviation.


THE SOFTWARE

The EXJTC software is used for data application purposes; it generates and provides a simple display of the various Jetgrouting parameters.

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