Application of Prestressed Anchor Cable Foundations in Structural Retrofitting of Wind Turbine Towers

The wind power industry aligns with the strategic needs of low-carbon development and serves as a significant driving force for the global green economic transformation. To adapt to the higher capacity of new-generation wind turbines， improve power generation efficiency， and prolong service life， it is essential to retrofit the foundation of wind turbines. The structural foundation of a wind turbine was upgraded by incorporating rock anchor cables in an actual project. This study employed ANSYS software to establish a three-dimensional model for analyzing and calculating the principal stress and deformation of the concrete foundation， as well as the stresses in anchor bolts and anchor cables， and steel anchor plates of the prestressed anchor cable foundation. The analysis was conducted under three conditions： prestressing， normal operation， and extreme loading. The results indicated that the vertical deformation at the center and the overall rotational angle of the prestressed anchor cable foundation under extreme loading complied with the relevant code requirements. This finding demonstrated the feasibility of applying prestressed anchor cable foundations in the structural retrofitting of wind turbine foundations.