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CFA - CONTINUOUS FLIGHT AUGER PILES


CFA piles are cast-in-situ piles, where a hollow-stem continuous flight auger is rotated and driven into the ground at a controlled speed to the specified pile depth. Concrete is then pumped under continuous positive pressure through the hollow stem of the auger to fill the borehole as the auger is withdrawn.
Once auger is completely out of borehole a reinforcing cage can be inserted and driven into the fresh concrete to the designed depth.

Following the development of drilling rigs with extended masts and extraction forces, the range of diameters and depths for CFA piles has increased significantly and it is possible to install CFA piles through a wide variety of soils including clays, silts, peat, sand and sandy gravel. It is possible to install CFA piles through stiff soil layers and to socket them into rock. 

Baltpile can drill piles of folowing diameters 400 mm; 550 mm; 630 mm and 880 mm, length – up to 19.5 m.


ADVANTAGES:    
  • The drilling system is suitable for all soil types;
  • High daily production outputs;
  • High construction quality​​;
  • There is no vibration during their installation.
 

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