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Jet grouting

TRACK JG

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The TRACK JG device monitors the drilling as well as the grouting phase in jet grouting.

Retrieving the monitor with jets is controlled in steps or proportional pull-out; jet grouting can be done on ascent or descent.

Metered drilling parameters:

  • Depth / drill advance
  • Drill bit revolutions
  • Drill torque
  • Pull / thrust
  • Drilling fluid pressure – max. 3 media
  • Flow / volume of drilling fluid – max. 3 media

Counted drilling parameters:

  • Drilling energy

Jet grouting metered parameters:

  • Depth / drill advance
  • Drill bit revolutions
  • Drill torque
  • Pull / thrust
  • Drilling fluid pressure – max. 3 media
  • Flow / volume of drilling fluid – max. 3 media
  • Batching grouting media per 1 meter of depth drilled
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Special metered parameters:

  • Drilling rigs / rod’s tilt
  • Vibrations / gravitational speed-up
  • GPS coordinates

Program TEC2 – parameters counted, e.g.:

  • Drillability
  • Local changes coefficient

Status indicators:

  • Clamping / drill rods’ replacement
  • Cleaning out the drill hole
  • Number of rods in drill hole
  • Jet’s position in drill hole

Data recording:

Data is recorded based on change of depth, which in practice is every 10 – 40 mm, or based on real time – each 2 – 5 s.

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Controlled retrieval:

Controlled retrieval for stepping is set by the step height – 30 – 50 mm and the necessary advance speed of 5 – 100 cm / min. In case of proportional retrieval, only the necessary advance speed is pre-set. The TRACK device can be pre-set to 3 advance speeds that can be changed during the retrieval stage, depending on the project’s operational necessity.

Operating the TRACK JG device:

Operation of this device is not complicated and training of the drill operator can be finished in 3 – 5 drillings. The head driller is helped in operation only by the individual monitors that start automatically, according to the current activity and it is also possible to change the functions, so that it is compatible with the equipment’s needs. The TRACK JG device program is further equipped by additional information functions, such as status identification, when the clamps are almost shut (the depth meter is blocked by pressure from clamps), but despite that, it is still possible to continue drilling.

Displaying metered parameters:

Metered parameters are displayed in the TRACK JG device in numeric format, in graph depth (time x metered parameter). In practice, it is possible to indicate on the drill’s graph during drilling, each individual geological layer (the quarry substrate, foundation’s level, among others) and control a perfect finish of the grouting process during the jet grouting segment, followed during the drilling rods’ replacement, the drill hole rinse / blow-out and so on.

Other technologies:

Depth and angle

Drilling

CFA

Deep Soil Mixing

Grouting Track

Grouting Monitoring MB

Vibroflotation

Anchor Prestressing

Pile load tests