Geotechnical investigations
Onshore wind turbine foundations

In order to assess the geotechnical site conditions and geological risks, and to define the characteristic values of the geotechnical design parameters, a geotechnical investigation program at the site of each wind turbine in a wind farm is a prerequisite for the pre-project (G2-AVP) and then project (G2-PRO) geotechnical design missions, as defined in standard NF P 94 500 of November 2013.

• The definition of the geotechnical investigation campaign is based on prior bibliographical knowledge of the site:

  • BRGM 1:50,000 geological map;

  • BRGM hydrogeological map;

  • public mapping (clay/cavity/water table rise, seismicity, etc.);

  • boreholes available locally in the BSS subsoil database, maintained by BRGM.

  In areas where wind farm development is likely to be significant, geotechnical...