Simplex Jet Grouting Drilling System
D 76,1 – 114,3 (3”– 4-1/2”)

with hydraulic drifter

This drilling system is an erosion based system that creates in situ engineered geometries, such as columns, of mixed soil-cement in the subsoil. The aim is to improve the ground conditions by i. e. consolidation, vertical shoring or slicing the soil structure by means of a high velocity jet of grout at pressures of 100 bar (1450 psi) to 600 bar (8700 psi). The drill tools have been specifically designed to withstand these high pressures.

The drilling process is primarily performed with a hydraulic drifter and external flushing.

Having reached the final depth, the rods will be retracted slowly, allowing a jet of cement suspension to cut through the surrounding ground. The corresponding nozzles are mounted within the monitor. The drilled cuttings are partly discharged with the return movement of the flushing medium, partly homogenised with cement.

There are complete systems with D 76,1 (3”) up to 114,3 (4-1/2”) with different nozzle diameters and percussion drill bit types available that are suitable for soils with rocky enclaves and rocky strata.

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Product information sheet

DIAMETER OF
76,1 TO 114,3 (3” TO 4-1/2”)

COMPLETE FLEXIBIITY

Each of our drilling systems are custom-made – 100 % adapted to the project needs and the ground conditions encountered at the construction site.

All drill bits are available in a plethora of designs and borehole diameters, project and / or customer specific

Einfach HDI-BOHRSYSTEM D 76,1 – 114,3 Imagemap
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Einfach HDI-BOHRSYSTEM D 76,1 – 114,3 Imagemap
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  1. Shank adapter to suit hydraulic drifter brand and model
  2. Flushing ring holder taylor-made to integrate seamlessly with brand and model of hydraulic drifter as well as drill mast characteristics
  3. Simplex jet grouting flushing head (swivel) to suit shank adapter and jet grouting tubes
  4. U seals (1 set of 2)
  5. Simplex jet grouting tubes – in lengths of 500 mm (approx. 1-5/8’) to 6000 mm (approx. 20’)
  6. Starter rod with box threads at both ends – connected to a percussion drill bit with incorporated nozzle seat
  7. Simplex jet grouting monitor with nozzle seats
  8. Jet grouting nozzles in diameters of 2 mm (5/64”) to 8.5 mm (21/64”)
  9. Jet grouting automatic valve with matching springs (blanche, green, copper, red and blue) Each colour has a certain spring force. More information available upon request.
  10. Percussion drill bit
  11. Steel ball (to be used with the drop ball method if preferred)
  12. Jet grouting nozzles in diameters of 2 mm (5/64”) to 8.5 mm (21/64”)
  13. Percussion drill bit with nozzle seats and steel ball seat (drop-ball method)

The thread profiles are available in right-hand (RHT) and left-hand (LHT), as well as conical and cylindrical versions.