Wind turbine and wind turbine foundation

Abstract

A wind energy plant is provided with a foundation base and a tower which is placed on the foundation base. The foundation base has a foundation plate below ground level and a foundation plinth on the foundation plate above ground level. On the foundation plinth a tension cord connector is provided with a plurality of bores for receiving tension cords. The tension cords are tensioned on an underneath side of the connector by means of a tension cord head. The foundation plate and the foundation plinth are cast in one piece from site-mixed concrete.

1 . A wind turbine comprising:
 a foundation having a portion in a ground and a portion above a ground level, the foundation including a foundation plate and a foundation plinth that extends from the foundation plate and above the ground level, wherein the foundation plate and the foundation plinth are cast in a single piece of concrete;   a tension cord connector provided on the foundation plinth, the tension cord connector including a plurality of bores for receiving tension cords, wherein the tension cords are tensioned at a lower surface of the tension and cord connector by a tension cord head; and   a tower located on the foundation.   
     
     
         2 . The wind turbine according to  claim 1  wherein an upper side of the concrete plate is spaced from a lower side of the tension cord connector or a position of the tension cord head by a distance. 
     
     
         3 . The wind turbine according to  claim 2  wherein a height of the tension cord connector is the same as the distance between the upper side of the concrete plate and the lower side of the tension cord connector or the position of the tension cord head. 
     
     
         4 . A wind turbine foundation base, comprising:
 a foundation plate located below ground level; and   a foundation plinth that is integral with and extending from the foundation plate above ground level, wherein on the foundation plinth is a plurality of bores for receiving tension cords, wherein the tension cords are tensioned on a lower surface of the connector by a tension cord head.   
     
     
         5 . The wind turbine foundation base according to  claim 4  wherein the foundation plate and the foundation plinth are formed from concrete. 
     
     
         6 . The wind turbine foundation base according to  claim 4  wherein the lower surface of the connector is above and spaced apart from the foundation plate by a distance. 
     
     
         7 . The wind turbine foundation base according to  claim 6  wherein tension cords are spaced from the foundation plate. 
     
     
         8 . The wind turbine foundation base according to  claim 4  wherein the foundation plinth extends from a middle portion of the foundation plate.