Schraubpfähle: Herstellung,Tragfähigkeit und numerische Modellierung

Screw piles: construction methods, bearing capacity and numerical modeling. In the last years the technology of screw‐piling has been developed to overcome the shortcomings of the non‐displacement piles (e.g. bored or flight auger piles) that are always accompanied by soil disturbance, which affect negatively the pile bearing capacity. On the contrary, the screw piles can be considered more or less as full displacement piles, which are comparable with the conventional displacement driven piles. Due to vibration free installation and minimal noise disturbance of the environment they can be applied in urban areas, where driven piles are not appropriate. The full displacement screw piles offer meaningful advantages in terms of environmental engineering. This relatively new piling technology is used successfully as an efficient foundation system that fulfils both stability and serviceability requirements. The use of standard compact machines with high productivity simplifies site operations and contributes to economical performance of the system at the same time. A general overview of the pile system ‐installation techniques, process and bearing capacity – will be described and discussed. First numerical analyses, calibrated on pile load tests to check the validity of the numerical model were applied.