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Article | REF: C262 V1

Onshore wind turbine foundations

Authors: Eric ANTOINET, Maxime MARTHE

Publication date: November 10, 2020 | Lire en français

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    Overview

    ABSTRACT

    The horizontal force produced by the air flow on the wind turbine blades generates an overturning moment at the mast base. The geotechnical foundation design of onshore wind turbines is based on the tilting criteria compliance. Controlling the sole peel-off results in requirements for the diameter, mass and anchoring depth depending on the load cases and buoyancy pressure. The type of foundation depends on the soil bearing capacity and its deformability.

    The article presents the different possible foundation modes: superficial slab, with or without ground improvement, or deep foundations.

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    AUTHORS

    • Eric ANTOINET: Technical Manager Infrastructure - Antea Group, Olivet, France

    • Maxime MARTHE: Head of Wind Turbine France - Antea Group, Lille, France

     INTRODUCTION

    Over the past twenty years, some 9,000 onshore wind turbines have been built in France, in 1,400 wind farms. New wind turbines are expected to be built at a rate of between 600 and 700 a year over the next few years.

    This article deals with the geotechnical issues associated with the design and construction of foundations for horizontal-axis wind turbines (figure 1 in direction F HE ), located on land.

    .Stresses applied by the wind turbine to its footing and foundation soil
    Figure 1  -  Stresses applied by the wind turbine to its footing and foundation soil
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    KEYWORDS

    geotechnical engineering   |   wind turbine   |   foundations   |   onshore wind turbine

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