Abstract
In recent years, in parallel with the developing technology not only in the world but also in Turkey, Wind Power Plants (WPP), which are among the renewable energies, are widely constructed. To build the wind turbines safely, the units of the turbine site area should not exhibit weakness, have sufficient bearing capacity, and do not have the risk of settlement and liquefaction. On the other hand, a structural analysis of a bored pile under mat foundation takes an important place in a foundation design of wind turbines. However, there is no design guideline for the wind turbine foundation design for structural engineers.
 
 Kale Energy constructed wind power plants within the scope of the Dilek WPP project located in Alanlı Village, Andırın District, Kahramanmaraş Province. According to the geological and geotechnical studies carried out in the turbine areas, it was determined that the units of the T-12 turbine were weak, and the bearing capacity was determined as insufficient. For this reason, it was planned to carry out the necessary improvement works with the application of piles to ensure adequate bearing capacity of the foundation. This study covers the geotechnical and structural analysis of a bored pile under the mat foundation. As a result of the analyzes, thirty-seven piles were placed under the mat foundation. The length and diameter of the bored pile are determined as 15 and 0.8 meters, respectively. The pile spacing from center to center was used as 3 meters.
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