Continuous flight auger piles

Continuous flight auger piles are a type of deep foundation that involves the use of a continuous hollow auger and filling with a concrete under high pressure.

The main advantages of such piles are:

• the ability to care significant vertical and horizontal loads;
• carrying of significant moments;
• lack of use of casing pipes and clay slurries;
• absence of vibrations during installation;
• installation speed compared to bored piles.

CFA piles are widely used under the following conditions:

• buildings with significant vertical and horizontal loads;
• building foundations with significant moments;
• execution of retaining walls and protection of pit sides;
• buildings and structures constructed on unstable soils.

The process begins with drilling a hole with a continuous hollow auger to the required depth. Then, through the auger, concrete is fed to the hole under high pressure. The hole is evenly and densely filled, because of slow withdrawing the auger from it. At the end, the reinforcing frame is mounted in the freshly placed concrete