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Full displacement drilling

A single-pass drilling method

Full displacement drilling is a modified version of continuous flight auger drilling and is exclusively used for producing cast-in-place piles. The surrounding soil is only displaced and almost no drill cuttings are conveyed to the surface. Instead of a continuous auger a smooth casing is used. At the lower end the casing is fitted with a so-called displacement body.

Procedure for 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

Video full displacement drilling

The video shows various Liebherr carrier machines working with full displacement tools.

Displacement body

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

01/06

Drilling rig with fixed leader for drilling depths of more than 50 metres

With a lattice boom leader and crawler crane as carrier machine, cast-in-place piles of more than 50 metres in length can be produced.

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