Piles

They form the foundation without which countless buildings would be impossible to construct: our bored piles. These are cylindrical bodies made of concrete with or without reinforcement. They discharge high structural loads into load-bearing soil strata and are constructed in a line or with overlapping secant design to form a supporting wall for an excavation pit or to seal off groundwater. The length, diameter, material, formation and placement of the piles can vary according to your individual requirements. 

Kelly pile

For this method, the drilling tool is attached to a telescopic Kelly bar, which is continually turned into the subsoil while the soil is gradually removed from the casing. This method can be used to install uncased, partially cased, fully cased or slurry stabilized piles. 

Continuous Flight Auger pile (CFA)

With this method, an auger is used as drilling tool. Once the tool reaches the final depth, the hollow stem auger concretes from the bottom up. The reinforcement is installed afterwards, assisted by vibration if necessary. This rotary drilling technique enables high drilling performance. 

Double-head drilling system (Twin Rotary Head)

The double-head system combines the CFA method with the cased Kelly drilling method. The result is a cased borehole created with a continuous flight auger. This is particularly advantageous in areas with high groundwater and soil which are in danger of being lifted and require drilling underwater load. 

 

Full Displacement Pile (FDP)

Almost no drill spoil is brought above ground with this method – a decisive advantage. The drill string consists of a starter auger, the displacement pile body and an extension pipe. During extraction and pulling the existing soil is displaced, concreting and reinforcement are carried out in the same way as CFA piles. 

 

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