Drilling

The most frequent targeted drilling application is the production of cast-in-situ concrete piles and furthermore for soil improvement. Concrete piles can be manufactured in several ways, e.g. drilling with or without casing. Common drilling procedures are kelly drilling, DDK and VDW system, CFA drilling with continuous flight auger, soil mixing and part or full displacement augering.

The pile production is carried out depending on purpose as single piles, pile groups, tangential or contiguous pile walls. The single piles and pile groups are used in most cases for foundation purposes. Tangential or contiguous pile walls serve retaining wall of excavations or potentially as a load bearing foundation for the new building structure.

Drilling procedures are applicable in nearly all soils. By difficult hard or rocky soil conditions drilling heads/rotaries with down-the-hole-hammers are used.

With our machines the following procedures can be accomplished:

CFA Piles
Double Auger Head System VDW, in front of the wall
Double Rotary Head System DDK, dual drilling
Dry Speed-Mixing
Fulldisplacement Piles
Kelly Drilling
Partdisplacement Piles
Wet Speed-Mixing
or a combination of methods above