Continuous flight auger drilling
A single-pass drilling method
CFA drilling (cast-in-place piles)
Continuous flight auger drilling belongs to the dry rotary drilling methods. It is suitable for predrilling as well as for the installation of cast-in-place piles. The soil (under certain conditions also rock) is loosened and conveyed continuously using a continuous flight auger. The borehole wall is supported by the auger flights filled with drill cuttings.
Procedure of producing a cast-in-place concrete pile with continuous flight auger drilling:
Video: Continuous flight auger drilling
The video shows an LRB 125 installing cast-in-place piles using the continuous flight auger drilling method.
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Drilling with continuous flight auger
Conveyance
Auger flights filled with drill cuttings
Kelly extension
