Deep foundation
liebherr-ccfa-cased-continuous-flight-auger-drilling-doppelkopf-vdw-vor-der-wand-bohren-stage-min

Double rotary drilling

A single-pass drilling method

Cased continuous flight auger drilling (CCFA)

Double rotary drilling combines continuous flight auger drilling with a continuous casing. Casing and auger (inside the casing) are simultaneously installed and extracted. Double rotary drilling is applied for the production of cast-in-place piles and for predrilling.

liebherr-verfahren-doppelkopfbohren-ccfa-cased-continuous-flight-auger-equipment-min
liebherr-verfahren-doppelkopfbohren-ccfa-cased-continuous-flight-auger-procedure-min

Procedure of producing a cast-in-place concrete pile with double rotary drilling:

1. Positioning at the drilling point

2. Auger drilling with simultaneous advance of the casing

3. Extraction of auger and casing while concrete is pumped in through hollow stern

4. Inserting the reinforcement

5. Finished pile

Video double rotary drilling

The video shows two jobsites with double rotary drilling for producing cast-in-place piles.

liebherr-ccfa-cased-continuous-flight-auger-drilling-doppelkopf-vdw-verrohrung-endlosschnecke-2-min

Combination of continuous flight auger and casing

This method combines continuous flight auger drilling with a casing. It is mainly applied for producing cast-in-place piles.

01/08

Machines

Results 1–6 of 15
liebherr-ccfa-cased-continuous-flight-auger-drilling-doppelkopf-vdw-vor-der-wand-bohren-job-report

LRB 18 with double rotary drive DBA 80

Pile wall must be installed for the foundation of residential and business premises in an extremely tight space.

01/04
liebherr-ccfa-drilling-tools-bohrwerkzeuge-doppelkopfbohren-vdw-min

Tools for professionals

  • Augers, auger starters, casings, cutting shoes
  • Wear parts (chisels, teeth, pilot bits, blocks)

Get in touch

If you have any further questions, please contact our local sales or service team.