Low-noise and vibration-free.
Atlas piles are full displacement drilled piles, or FDP, as per DIN EN 12699. This low-noise pile system is often used on inner-city sites to reduce the disturbance caused to residents by construction noise. The vibration-free fabrication system means the Atlas piles are also well-suited for projects located right next to fragile buildings.
Comparison between Atlas and Fundex piles.
A steel pipe with a rotating, detachable thread cutting head mounted on the bottom is driven into the soil. This cutting head displaces or compresses the soil to each side. The cutting head is equipped with a waterproof seal in the form of a non-recoverable toe.
The rotary drive screws the cutting head and pipe into the ground without vibration by using steady contact pressure. The hydraulic driving pressure is measured as the drill descends and compared with soil composition information such as drill profiles and sounding diagrams. Once the required driving pressure is reached, the reinforcement cage is inserted.
The pipe and storage tank are then filled with concrete and pipe and cutting head are unscrewed from the ground again. The pile toe detaches and the cutting head shapes the threaded pile. The significant static excess pressure of the concrete column within the pipe and container causes the vacated space to fill with concrete immediately. A spiral concrete protrusion, approx. 5cm thick, will form in the soil around the pile shaft.
Full soil displacement means this pile system is also suitable for use on contaminated sites. To reduce the carryover of contaminated soil during pile fabrication, we use a 60-degree pile toe when drilling through the contaminated layer. Alternatively, it is also possible to work with a lead seal fitted, to prevent the pollutant from travelling into deeper layers.
The short preparation period, speed of pile fabrication and high load-bearing capacity of the spiral-shaped Atlas piles ensure high economic viability and shorter construction periods. The insertion process and constant monitoring of the necessary resistance mean the pile length can be ideally adapted to the various soil layers.
- Typical load rating up to 2,000kN
- High skin friction
- Full soil displacement
- Very good resistance and settlement characteristics
- Very economical