Pile Foundation

Pile foundations transfer the loads coming from the WTG to the under-lying ground. Any type of piles (driven, precasted, drilled, screwed, etc.) can be used.
A pile is basically a long cylinder or prism of reinforced concrete or a tube of steel, that is placed in the ground to transfer the loads coming from the top structure by friction or cap resistance.


When is it needed ?
Pile foundations are used in wind parks where the soil cannot bear the compression or tensile loads applied by a gravity foundation.
The piles have to carry concentrated loads and are subject to fatigue loads. Their design has to consider carefully the topology and so the soil report drilling logs.
What is special ?
Experience is a must to be able to understand and interprete correctly the geotechnical findings on site.
Every pile has an area of influence in the ground around it which can also vary from one soil layer to the next.
![pile foundation ventos da bahia wind farm 2[1] ventos da bahia wind farm pile foundation design](https://cte-wind.com/wp-content/uploads/2025/01/ventos_da_bahia_b_wind-farm-21.jpg)

About the piles
They can be determined as single element or as a pile group. In our current projects, piles length was found from 10 m to 70 m.
The pile’s stiffness is an important criteria that influences on differential settlements and the dynamic rotational spring stiffness.

