Full displacement drilling

1. Positioning at the drilling point

2. Auger drilling until the final depth is reached

3. Extracting the auger and pumping in concrete

4. Pressing or vibrating in the reinforcement

5. Finished pile

The casing is equipped with a displacement body at the lower end.

With full displacement drilling almost no drill cuttings are conveyed to the surface. The surrounding soil is only displaced.

After the casing has been drilled down it is extracted again.

During extraction the concrete is pumped through the hollow stem and exits at the lower end.

Depending on the process the reinforcement cage can be inserted either before or directly after extraction of the casing.

The drilling depth is increased when using a Kelly extension.