Tripile foundation structures consist of a tripod construction which tapers in the upper apex and joins together to form a supporting cross. The steel pipe sections of the wind turbine are placed and connected in this area. In the lower area, three foundation piles are driven into the seabed, on which the tripile construction is placed. This process is also called pre-pilling, as the piles are set first. The arrangement of the piles corresponds to that of an equilateral triangle. This pile foundation is carried out to a depth of 30m, depending on the nature of the seabed.
Tripile Gründungsstruktur
This type of foundation for offshore structures can be used in water depths between 25 m and 50 m. The advantage of this construction, compared to monopiles, is that three piles are now used instead of one. This distributes the force over several piles, which means that smaller diameters are required. This reduces the effort and material (wall thicknesses) during production, transport (diameter) and assembly (weight). Depending on water depth and ground conditions, the selected foundation structure can be modified.
Our services
On the part of SKI Ingenieurgesellschaft the following services can be provided in the field of offshore foundation structures:
- Natural frequency analysis
- Load simulations in the ultimate limit state
- Calculations of fatigue loads in the time and frequency domain
- Buckling analyzes for individual pipe sections
- Evidence for welding and bolt connections
- Calculation of ring flange connections
- Berücksichtigung von Wellenlasten
- Design of grouted Joints and pile-sleeve connections
- Local stress and fatigue calculations for tubular joints
- Stress and stability checks for the pipe profiles
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