Does the wind power foundation have a foundation cushion?

The wind power generation foundation has a foundation cushion. The foundation of wind farm usually adopts raft foundation or pile foundation formed by concrete pouring. Under these foundations, the foundation cushion is usually laid to smooth the foundation surface, ensure the foundation to bear the load evenly and reduce the foundation settlement. The foundation cushion is generally made of crushed stone, gravel, sand and other materials, and its thickness is generally above 20cm. The specific thickness and material selection shall be designed and constructed according to the geological conditions and load requirements of the wind farm.