Deep foundation
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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.

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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.

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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
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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
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Tools for professionals

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

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