Duplex Jet Grouting Systems D 76.1 - D 114.3 with rotary head and hydraulic chuck
These drilling systems are especially used for grout injection to improve the ground conditions by i.e. consolidation, vertical shoring or lining slicing the soil structure by means of a jet of grout at pressures of 100 to 600 bar.
This drilling process is normally carried out using a rotary head and external flushing. The drilling tools are adapted for the extreme pressures used. Having reached the final depth, the rods will be pulled up with slow pull back, allowing a jet of cement suspension to cut the surrounding ground. The depth of penetration of the jet can be increased by air via a separate nozzle. The borings are partly discharged with the flushing return movement, partly homogenized with cement.
There are complete systems of D76.1 – D114.3 with different nozzle diameters and types of drill bits available. They are suitable for boulders and loamy grounds.
Product information sheet:
Duplex Jet Grouting Systems with rotary head and hydraulic chuck (278KB)
more informationen in PDF
Examples of application: