Wind power plant foundation structure

A wind turbine foundation structure comprising,

• a hollow structural element having a longitudinally extending, circumferential wall, a first cable feed-through being disposed in the circumferential wall and breaking through the circumferential wall,
• a transition piece comprising:
• an overlap region projecting into the hollow structural element and a transition region projecting out of the hollow structural element at an end face of the hollow structural element, and
• a transition piece circumferential wall extending in a longitudinal direction, wherein a second cable feed-through breaks through the transition piece circumferential wall and is arranged in the overlap region in the transition piece circumferential wall, and
• wherein
• in an assembled state of the hollow structural element and transition piece, the first and the second cable feed-through bear against one another and at least partially overlap each other;
• wherein
• a center point of the cable feed-through of the hollow structural element is offset in the longitudinal direction of the hollow structural element with respect to a center point of the cable feed-through of the transition piece, wherein the distance of the center points is smaller than an opening radius of at least one of the cable feed throughs.

A wind turbine foundation structure comprising,

• a hollow structural element having a longitudinally extending, circumferential wall, a first cable feed-through being disposed in the circumferential wall and breaking through the circumferential wall,
• a transition piece comprising:
• an overlap region projecting into the hollow structural element and a transition region projecting out of the hollow structural element at an end face of the hollow structural element, and
• a transition piece circumferential wall extending in a longitudinal direction, wherein a second cable feed-through breaks through the transition piece circumferential wall and is arranged in the overlap region in the transition piece circumferential wall, and
• wherein
• in an assembled state of the hollow structural element and transition piece, the first and the second cable feed-through bear against one another and at least partially overlap each other;
• wherein
• the hollow structural element is formed at least in parts from at least one of
• a building material with a water/cement ratio (w/c) of less than 0.45, and/or
• a building material with a strength class of at least C40/50, according to EN 206 and EN 1992, and/or
• a building material with a pore content (air voids) of less than 5%, and/or
• a building material with a cement content of at least 350 kg/m3, and/or
• a building material with a porosity P28d of less than 12 vol %, as measured by a mercury pressure porosimetric measurement.