Foundation for a wind power plant

Abstract

A foundation for a wind power plant includes a circular or polygonal pedestal divided into several ring sections for carrying a tower and support elements extending radially outward from the pedestal, wherein the ring sections and the support elements are designed as prefabricated concrete elements or are assembled from prefabricated concrete elements, and wherein adjacent support elements are spaced from one another in the circumferential direction, adjacent support elements are each connected with one another by a tangentially extending beam designed as a prefabricated concrete element.

Claims

1. A wind power plant foundation, comprising a circular or polygonal pedestal divided into several ring sections for carrying a tower and support elements extending radially outward from the pedestal, wherein the ring sections and the support elements are designed as prefabricated concrete elements or are assembled from prefabricated concrete elements, wherein adjacent support elements are spaced from one another in the circumferential direction, and wherein adjacent support elements are each connected with one another by means of a tangentially extending beam designed as a prefabricated concrete element, wherein the tangentially extending beam has a cross-sectional profile with two legs, wherein one leg of the two legs is fixed to the adjacent support elements and the other leg of the two legs forms a support structure that protrudes radially outwardly from the adjacent support elements and is adapted to be supported against the ground, wherein a space between two adjacent support elements is bridged by at least one bridging plate, the at least one bridging plate being designed as a separate concrete element from the two adjacent support elements and bridging the two adjacent support elements without being fastened to said two adjacent support elements, and wherein the at least one bridging plate is supported radially outwardly against the tangentially extending beam such that the tangentially extending beam forms a stop that prevents the at least one bridging element from moving radially away from said space.

2. The foundation according to claim 1, wherein ends of the tangentially extending beam are fastened to the adjacent support elements in a form-fitting manner or with the aid of a fastener.

3. The foundation according to claim 1, wherein the tangentially extending beam is attached to ends of the adjacent support elements facing away from the pedestal.

4. The foundation according to claim 1, wherein at least one ring section of the several ring sections and an associated support element of the support elements are formed integrally with one another as a single prefabricated concrete element.

5. The foundation according to claim 1, wherein the prefabricated concrete elements consist of reinforced concrete which has a reinforcement structure.

6. The foundation according to claim 5, wherein the reinforcement structure includes reinforcement elements, profiles, rods or wires, which (a) are embedded in the prefabricated concrete elements or which (b) are designed as tensioning elements for bracing the prefabricated concrete elements together to form stressed concrete elements, or both (a) and (b).

7. The foundation according to claim 1, wherein a connection structure is provided which holds the prefabricated concrete elements forming the support elements and the pedestal together.

8. The foundation according to claim 7, wherein the connection structure is coupled to a reinforcement structure of the prefabricated concrete elements.

9. Wind power plant with a tower carrying a rotor, wherein the tower is mounted on a foundation according to claim 1.

10. The foundation according to claim 1, wherein cross-sectional profile is an L-shaped profile.

11. The foundation according to claim 1, wherein the at least one bridging plate is designed as a prefabricated concrete slab.

Description

(1) The invention is described in more detail below with reference to the exemplary embodiments shown in the drawing.

(2) FIG. 1 shows a foundation for a wind power plant, which consists of prefabricated concrete elements,

(3) FIG. 2 shows a prefabricated concrete element which is used in the foundation of FIG. 1, and

(4) FIG. 3 shows an inventive design of the foundation with bridging plates and outer support beams.

(5) FIG. 1 shows a foundation 1 which has a number of prefabricated concrete elements 3. The foundation 1 has a circular pedestal 2 in the form of a hollow cylinder for supporting a tower of a wind turbine. The foundation 1 also has a plurality of support elements 5 which protrude radially outward from the pedestal 2. The pedestal 2 is divided into several circumferential sections 4 (FIG. 2), a circumferential section 4 and a support element 5 each being formed integrally with one another as a prefabricated concrete element 3, as shown in FIG. 2. The support element 5 or the prefabricated concrete element 3 also has a base plate 6, which is also formed integrally with the support element 5. The prefabricated concrete elements 3 consist of reinforced concrete with reinforcing rods which are embedded in the prefabricated concrete elements 3.

(6) Although the support elements are shown in FIG. 2 as a prefabricated concrete element which consists of a single piece, the support elements can also be composed of two or more sections. This is particularly advantageous if a support element is to be implemented whose radial length exceeds the permissible length of conventional transport devices. In particular, two or more sections can be produced as separate prefabricated concrete elements, which are transported separately to the place of use and rigidly mounted to one another at the place of use.

(7) For precise alignment of the adjacent circumferential sections 4 with one another, the side surfaces can have interlocking form-fitting elements 8 and 9 in the manner of a trapezoidal tongue and groove arrangement, which cooperate with one another in order to ensure the relative position of the elements 3. Furthermore, the prefabricated concrete elements 3 can be tightened to one another by at least one tensioning cable, wherein the at least one tensioning cable can be arranged in a circumferential, in particular circular passage formed in the pedestal 2, the opening of the passage being denoted by 7. Of course, several passages can also be provided.

(8) FIG. 3 shows the embodiment according to the invention, in which the space between two adjacent prefabricated concrete elements 3 is bridged by bridging plates 11 and 12. The bridging plates 11 and 12 do not have to be fastened to the base plate 6 of the prefabricated concrete elements 3 by bolts, but can only rest positively on the support elements. To fix the bridging plates 11, 12, tangential beams 13 are provided which each connect two adjacent support elements 3 to one another. The tangential beams 13 form a stop which prevents the bridging plates 11, 12 from moving away from the pedestal 2. For the sake of clarity, only one of the beams 13 is shown in FIG. 3. Since each pair of adjacent support elements 3 is connected to one another by means of a beam 13, a total of eight beams 13 are provided in the present example, so that the beams 13 together form a polygonal, in particular octagonal, outer edge of the foundation.

(9) In the embodiment according to FIG. 3, the beams 13 are designed as angled supports which have an L-shaped cross section with a first leg 14 and a second leg 15. The second leg 15 extends radially outward and has a ground support surface with which the beam 13 can be supported on the ground. This provides additional support for the foundation.

(10) A lower section of the tower of the wind power plant to be fastened to the pedestal 3 is denoted by 10 in FIG. 3.