A bored pile is a cast in-situ concrete pile where the bored pile has to be cast in the borehole on the construction site. In close proximity to buildings and similar constructions, the condition of which does not allow pile driving, a bored pile can be the most attractive solution. Bored piles can be executed as:
- CFA piles (Continuous Flight Auger)
- FDP piles (Full Displacement Piles)
- VDW piles (Vor der Wand)
- Kelly bored piles
Boring is carried out to the required depth by means of either a crawler crane-mounted rotary boring unit or a purpose-built hydraulic drilling machine. Bored pile foundations are suitable for all types of soil conditions and generate little noise and vibration during installation. Aside from building foundation piles, the bored piling method is also used to form contiguous and secant bored pile walls for earth retention.