At our invitation, fifth-year students from ESITC Metz visited our special foundations site, where we are installing prestressed anchor ties to support wind turbine foundations.
TES TECHNIFOR is proud to take on this new challenge: founding three wind turbines, each resting on 32 ties. These wind turbines, which are wood and metal composite prototypes, are anchored on four blocks. Each block is supported by eight cable ties, with lengths varying from 26 to 32 metres depending on configurations.
The rotor of the largest wind turbine will reach 98 metres in height, while the blades can rise up to 160 metres. These wood/steel composite prototypes, founded on isolated tie-anchored blocks, are part of a sustainable development approach aimed at reducing the carbon footprint.
In numbers, this project represents:
- 96 P2 structure ties in DSI 11T15 cables, prestressed to loads between 135 and 146 tonnes each,
- 1 destructive compliance tie with the same characteristics,
- 1 destructive compliance tie with the same characteristics,
- 2,800 linear metres of drilling in Ø250 mm,
- 2 full-time drilling rigs in operation,
- over 300 tonnes of CEM III cement for IGU-type injection,
- 45 tonnes of prestressing cables.
All ties are re-tensionable and each foot is equipped with a load cell allowing real-time reading of the prestress. This project is a great reference in the field of prestressing, an exciting challenge and a remarkable achievement.
