Wind turbine foundation and method for fabricating such wind turbine foundation

Abstract

The present invention provides a wind turbine foundation for mounting a wind turbine tower, or a method for fabricating such a wind turbine foundation, which enables secure anchoring to the soil and allows for easy and efficient adaptation to each target hub height at the installation site using a standard wind turbine tower. [Solution] A wind power generation equipment foundation (1) for mounting a wind power generation equipment tower (102), comprising a foundation body (2) formed from concrete (B) reinforced with reinforcing material, the foundation body (2) having a substantially flat base plate having a base area, and a plurality of reinforcing ribs extending outward from the base area on the upper side of the base plate, and a base height (S) higher than 5m in the base area of ​​the base plate H A tower base (14) having ) is positioned.

Description

[Technical Field]

[0001] The present invention relates to a wind power generation facility foundation for mounting a wind power generation facility tower, comprising a foundation body formed from concrete reinforced with reinforcing materials. Furthermore, the present invention relates to a method for manufacturing a wind power generation facility foundation, in particular a wind power generation facility foundation having a foundation body formed from concrete. [Background technology]

[0002] The aforementioned type of wind turbine foundation is well known and is used to firmly anchor the wind turbine or its tower to the soil. Given the increasing demand for higher-power and larger wind turbines, and the need to continuously pour as little concrete as possible into the soil as possible for the foundation, there is a growing need for increasingly efficient anchoring of wind turbines, which in turn creates corresponding requirements for the foundations that must be formed.

[0003] Furthermore, at each wind turbine installation site, there is a demand to achieve the investigated "optimal" hub height to maximize the potential of the wind turbine at that site. This "optimal" hub height, hereafter referred to as the target hub height, often differs depending on the conditions given to the installation site and the surrounding land. Therefore, since the target hub height varies for each different installation site of a single wind turbine, in order to achieve the target hub height or approach the "optimal" hub height, wind turbine towers must be designed and manufactured to be individually adapted in terms of length for each installation site. Because such individual adaptations of wind turbine towers are linked to recurring high costs, new possibilities are sought to enable the achievement of the individually investigated target hub height for each installation site, nevertheless using cost-optimized standard towers with an unchanging basic length. [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] Therefore, the fundamental problem of the present invention was to provide, firstly, a wind turbine foundation for mounting a wind turbine tower, or a method for manufacturing such a wind turbine foundation, that enables secure fixation to the soil and secondly, enables simple and efficient adaptation to each target hub height at the installation site using a standard wind turbine tower. [Means for solving the problem]

[0005] According to a first aspect, the present invention solves the underlying problem in a wind power generation facility foundation for mounting a wind power generation facility tower having the features described in claim 1. In particular, the foundation body has a substantially flat base plate having a base area and a plurality of reinforcing ribs extending outward from the base area on the upper side of the base plate, and a tower base having a base height greater than 5m is arranged in the base area of ​​the base plate. [Effects of the Invention]

[0006] In this case, the present invention utilizes the knowledge that even with wind turbine towers having a uniform standard length, the "optimal" hub height (target hub height) surveyed for the installation site can be easily achieved depending on the wind turbine to be installed, by placing a tower base having a base height that can be individually adapted to a height higher than 5m depending on the conditions given at the installation site in the base area of ​​the base plate. By providing such a foundation according to the present invention, different target hub heights can be achieved for each wind turbine without the need to perform the time-consuming task of adapting the tower length of the wind turbine tower. Furthermore, adapting the base height of the tower base to be placed in the base area of ​​the base plate can be achieved more easily than adapting the length of the wind turbine tower, especially within a small height range.

[0007] According to a preferred embodiment of the present invention, the base plate has a substantially circular outer contour. This preferably allows for uniform loading within the soil at the wind power plant installation site, particularly through the circumferential surface of the foundation. Furthermore, the circular configuration of the base plate requires less concrete to manufacture compared to a square base plate with side lengths corresponding to its diameter.

[0008] In a preferred embodiment of the wind turbine foundation, the base plate has a diameter of approximately 16 m or more, preferably in the range of 16 m to 30 m, and particularly preferably larger than 30 m, the size of which depends on the size of the wind turbine to be assembled to the foundation.

[0009] In a preferred improved form, the base plate is formed from cast-in-place concrete, which allows for the simple fabrication of the base plate at the wind power generation equipment installation site. Furthermore, on-site concrete finishing (Betonieren) is relatively simple, even if some logistics are required to transport the cast-in-place concrete to the wind power generation equipment installation site, and facilitates the individual adaptation of the foundation size to the equipment size to be realized at the installation site.

[0010] In a preferred embodiment, the tower base and reinforcing ribs of the wind turbine foundation are formed from precast concrete or cast-in-place concrete. By prefabricating a portion of the foundation, particularly the tower base or a section thereof, or the reinforcing ribs, in a concrete factory, automated fabrication in a mold, preferably one that can be reused multiple times, is facilitated. The precast concrete thus fabricated has high dimensional stability and in this case, only needs to be transported to the installation site. Preferably, the precast concrete is joined to a base plate and base area, which have already been fabricated at the installation site, using cast-in-place concrete. Preferably, the foundation, having at least a flat base plate with a base area and reinforcing ribs positioned on this base plate, is formed as a monolithic component.

[0011] In one embodiment, at least one section of the tower base to be placed in the base plate's base area may be formed from cast-in-place concrete and monolithically bonded to the base plate, and in particular, only the upper section of the tower base, especially for heights greater than 5 m, may be formed from precast concrete. In a further embodiment, the tower base and reinforcing ribs may be formed entirely from cast-in-place concrete.

[0012] Preferably, the base plate and the base region have a central region without reinforcing material. In particular, the region of the foundation to which relatively small loads are applied is formed with a reduced proportion of reinforcing material, or in a preferred configuration, without reinforcing material. This allows for a suitable reduction in the proportion of steel used to form the foundation.

[0013] In the improved form of the wind turbine foundation, the base plate has a thickness of less than 1 m, particularly less than 0.70 m, preferably about 0.50 m. Preferably, the thickness of the substantially flat base plate is selected so that it can withstand the forces acting on the foundation as a whole without affecting the strength of the base plate. Preferably, the base plate has a thickness of about 50 cm, in which case the base plate thickness can be varied by only about 10-20% depending on the diameter of the foundation and, in some cases, the number of reinforcing ribs placed on the base plate of the foundation.

[0014] In one improved configuration, the reinforcing ribs are specified to have decreasing rib height and / or nearly constant rib width, extending outward in the direction of extension. The reinforcing ribs, whose height decreases from the base area toward the outer surface of the foundation, ensure reliable and structurally simple force delivery into the foundation formed by the present invention, and further into the soil supporting this foundation. Preferably, multiple reinforcing ribs evenly distributed around the base area of ​​the base plate ensure sufficient overall strength of the foundation, even if the concrete material is potentially significantly trimmed by the free space between the upper reinforcing ribs of the base plate. Preferably, the region between the reinforcing ribs of the foundation has a strength of at least 18 kN / m 3 The foundation is filled with compacted load soil (Bodenauflast) having a minimum weight. The foundation formed in this manner according to the present invention may have a tower base having a base height greater than 5 m, and the foundation body according to the present invention may project at least partially beyond the upper edge of the site, in which case, preferably, the foundation body is loaded at least by additional load soil at the installation site. Preferably, the load soil may have an overhang that projects beyond the outer contour of the base plate.

[0015] Preferably, 10, 12 or more reinforcing ribs are arranged on the base plate surrounding the base area. Preferably, the rib height of each reinforcing rib is reduced by more than half the height from the starting height near the base area to the opposite end. In a preferred configuration, the reinforcing ribs have a constant rib width, starting from the base area and particularly in the direction of the outer contour of the base plate to which each reinforcing rib extends. In a possible alternative configuration, the rib width of the reinforcing ribs may gradually decrease from the base area towards the outer contour of the base plate.

[0016] According to a preferred improved embodiment of the present invention, the base plate has a substantially flat upper surface, and a joint is provided between the upper surface of the base plate and each of the reinforcing ribs positioned on this upper surface. The joint, which may be substantially smooth or coarse, and in particular may be formed with teeth, causes at least partial structural separation of the portions of concrete material forming the base plate and the reinforcing ribs. However, a more immovable bond is achieved by reinforcing members extending through the space between the base plate and the reinforcing ribs. The joint improves, in particular, the transmission of shear forces acting longitudinally on the reinforcing ribs to the base plate, and consequently, the distribution of loads from the wind turbines installed on the wind turbine foundation to the entire foundation, which are applied to the tower base of the wind turbine foundation.

[0017] One improved form of a wind power generation equipment foundation is characterized in that one or more corrugated metal sheet strips are arranged in the adjacent component areas of the base plate and the reinforcing rib to form a coupling joint with a tooth row, preferably formed in a trapezoid. The one or more metal sheet strips arranged in the adjacent component areas of the base plate and the reinforcing rib enable a structurally simple configuration of the coupling joint with a tooth row. The metal sheet strip is preferably such that, during the fabrication of the foundation, the lower surface of the metal sheet strip directly contacts the upper surface of the flat base plate, but on the upper surface of the metal sheet strip, there is no concrete material that may overflow onto the upper surface of the metal sheet strip during the fabrication of the base plate, and it is incorporated into the base plate. The metal sheet strip is particularly formed in a trapezoid, whereby a stable configuration of the coupling joint with a tooth row between the opposing component areas is achieved, and particularly, partial malfunction of the component areas is avoided.

[0018] According to a preferred configuration, the foundation body has an anchor cage with a number of anchor rods extending preferably perpendicular to the base plate at least in its base area, and this anchor cage is configured to prestress the foundation body and attach the wind power generation equipment tower to the foundation. The anchor cage and its number of anchor rods ensure a reliable and particularly uniformly distributed force introduction from the wind power generation equipment tower coupled to the anchor cage, particularly into the tower base and further into the reinforcing rib of the foundation body. Furthermore, the anchor cage can prestress the base area of the foundation body, thereby reducing the risk of possible crack formation in the base area. This further promotes a base height significantly higher than 5 m.

[0019] The anchor cage is preferably partially disposed inside the base body and extends into the tower base disposed above the base area of the base plate. The anchor cage has a number of anchor rods directly embedded in the concrete of the base area, and these anchor rods are oriented perpendicular to the base plate, particularly with reference to the base plate.

[0020] According to a preferred configuration of the wind power plant foundation, the anchor rods extend from the base body beyond the upper surface of the tower base disposed on this base body.

[0021] Preferably, alternatively or additionally, at least one horizontally extending anchor plate is provided inside the base area of the base plate, and this anchor plate is preferably formed in a ring shape and connects a plurality or all of the anchor rods among the number of anchor rods to each other. With the thus formed anchor cage and its anchor rods, a continuous connection can be obtained between the base body, particularly the base plate, the base area formed on this base plate, and the tower base disposed above this base area, and the tower disposed on the tower base of the wind power plant.

[0022] In a preferred embodiment, exactly one anchor plate is provided inside the base body, particularly within the base area.

[0023] Preferably, the base plate has a trough-shaped protrusion on the lower surface of the base plate in the base area of the base body, and preferably, the anchor rods extend in this trough-shaped protrusion, and an anchor plate connected to this anchor rod is disposed therein. The anchor cage is preferably completely accommodated inside the base body at its lower end.

[0024] In particular, to form an anchor cage in a foundation with a base height greater than 5 m for a tower base, each anchor rod is formed from one continuous rod member or, alternatively, from at least two rod members connected to one another. In the case of two rod members, the opposing ends of these rod members preferably have threaded sections, and these threaded sections are connected to each other via a threaded sleeve. In a preferred embodiment, the anchor plate terminates on the lower surface of a grooved projection of the base plate or on the lower surface of a flatly formed base plate.

[0025] In a further embodiment, the present invention relates to a method for manufacturing a wind turbine foundation, particularly the wind turbine foundation described in any of the preceding embodiments, comprising a foundation body comprising a substantially flat base plate having a base area, a plurality of reinforcing ribs extending outward from the base area on the upper side of the base plate, and a tower base positioned in the base area of ​​the base plate.

[0026] The method according to the present invention solves the fundamental problem of the wind power generation equipment foundation according to the present invention by including the steps of determining or preparing the target hub height of the wind power generation equipment at the installation site of the wind power generation equipment to be installed, which includes a tower of a predetermined height to be mounted on a tower base, manufacturing a foundation body, and manufacturing a tower base to be placed above the base area of ​​the base plate, wherein the step of manufacturing the tower base includes adjusting the base height of the tower base to a base height greater than 5m, taking into account the tower height relative to the wind power generation equipment, thereby adjusting the hub height of the wind power generation equipment to match the target hub height. The method steps according to the present invention make it possible to manufacture a wind power generation equipment foundation that simplifies the process of adjusting the hub height of the wind power generation equipment to be installed to match the target hub height at each installation site for the wind power generation equipment using a wind power generation equipment tower having a uniform standard length, compared to known manufacturing methods. By adjusting the base height of the tower base to be placed in the base plate's base area to a base height greater than 5m, a reasonably cost-optimized wind power generation tower can be assembled to such a wind power generation foundation according to the present invention, which can be individually manufactured. Overall, it becomes possible to adjust the hub height within a range of deviation of only 8m. The deviation described can be caused not only by providing individually formed tower bases on the foundation, but also by positioning the foundation in the soil or appropriately optimized relative to the soil, particularly with respect to the height level of the foundation relative to the upper edge of the site at the installation site.

[0027] In a preferred configuration, the method according to the present invention is improved to include at least one, more or all of the following steps for manufacturing a foundation: a step of manufacturing and / or preparing at least reinforcing material for the foundation at the installation site, preferably at least a portion of which is formed as an anchor cage; a step of manufacturing and / or preparing formwork to surround the reinforcing material; a step of preparing precast concrete which preferably forms reinforcing ribs; a step of concrete finishing at least a base plate and a base area provided on the base plate by pouring concrete into the formwork, thereby embedding the reinforcing material almost completely in the concrete, preferably forming a joint between the precast concrete, the base plate and the base area by concrete finishing and using precast concrete as reinforcing ribs; and a step of adjusting the height of the reinforcing ribs at the ends of the foundation facing the base area according to the base height to be formed of the tower base.

[0028] To enable the foundation to be formed at the installation site for the wind power generation equipment, preferably using cast-in-place concrete, reinforcing materials are fabricated or prepared at the installation site that are appropriately sized to the base plate to be formed and the base area of ​​the base plate. Preferably, these reinforcing materials consist of an anchor cage that extends beyond the height of the base area and has a number of anchor rods that extend perpendicularly to the base plate. The prestressed anchor cage provides prestress to the entire base, thereby significantly reducing the risk of crack formation (see above). Thus, preferably, the amount of reinforcing material can be reduced, in which case, preferably additional reinforcing material is provided within the base.

[0029] After the reinforcing members are fabricated or prepared, they are placed in formwork appropriate to the shape to be fabricated for the foundation, in which case the formwork is used as a partition for the fluid cast-in-place concrete used to fabricate the foundation. In a preferred embodiment of the method according to the present invention, precast concrete, which is manufactured and prepared on-site, is used to fabricate the foundation. Preferably, the precast concrete forms reinforcing ribs on the base plate and extending radially outward from the base area. The base plate and its base area are then concrete-finished by pouring cast-in-place concrete into the fabricated or prepared formwork, in which case the reinforcing members, consisting of a number of interlocking steel braces, are almost completely embedded in the cast-in-place concrete. If precast concrete is to be used to form the reinforcing ribs, the precast concrete is positioned relative to the reinforcing members fabricated and / or prepared for the base plate and its base area, and is partially surrounded by formwork surrounding the reinforcing members. By applying a concrete finish, a joint is created between the precast concrete, the base plate to be formed from cast-in-place concrete, and the base area. In a preferred embodiment of the method according to the present invention, the height of the reinforcing rib, particularly at the end of the base plate facing the base area, is adapted to the base height to be formed by the tower base and the resulting final hub height of the wind power generation equipment. The height of the reinforcing rib on the base area side may be lower than the height of the base area of ​​the base plate. In an alternative configuration, the reinforcing rib has a height on the base area side that corresponds to approximately half the base height of a tower base having a base height of 5 m, which is positioned above this base area. The reinforcing rib may have any height within a predetermined range.

[0030] In a preferred improved form of the method according to the present invention, the steps for fabricating the tower base include at least one, more, or all of the following steps: preparing at least one precast concrete for forming the tower base and placing the precast concrete on the base area of ​​a hardened foundation; connecting the precast concrete to a reinforcing member projecting beyond the foundation; fabricating and / or preparing a reinforcing member for the tower base at the installation site, wherein at least a portion of the reinforcing member is preferably formed as an anchor cage; fabricating and / or preparing a formwork to surround the reinforcing member; and concrete finishing the tower base of the foundation by pouring concrete into the formwork, thereby embedding the reinforcing member substantially completely in the concrete. The tower base having a base height greater than 5 m to be formed in the base area of ​​the base plate may be fabricated from precast concrete or directly on-site by cast-in-place concrete. When cast-in-place concrete is used, in one configuration, the base plate's base area and the tower base to be fabricated, having a base height greater than 5m, are formed monolithically, and thus the base area and the tower base are formed as a single unit. When cast-in-place concrete is used to fabricate the tower base, a reinforcing member for the tower base, partially formed as an anchor cage, is fabricated at the installation site, in which case this reinforcing member for the tower base may partially be a reinforcing member for the base area and base plate of the foundation. In particular, a section of the foundation's reinforcing member and a section of the tower base's reinforcing member to be placed above the base area are connected to each other for improved load derivation.

[0031] A preferred embodiment or improved form described for a wind power generation facility foundation according to the present invention is also a preferred embodiment of the method according to the present invention for manufacturing such a wind power generation facility foundation. A preferred embodiment or improved form described for a manufacturing method for wind power generation facility foundations is also a preferred embodiment of a wind power generation facility foundation.

[0032] The present invention will be described in detail below based on preferred embodiments with reference to the accompanying drawings. [Brief explanation of the drawing]

[0033] [Figure 1] This is a diagram showing wind power generation equipment. [Figure 2a] Figure 1 is a schematic diagram showing how to install the wind power generation equipment at a single height level. [Figure 2b] Figure 1 is a schematic diagram showing how to install the wind power generation equipment at a single height level. [Figure 2c] Figure 1 is a schematic diagram showing how to install the wind power generation equipment at a single height level. [Figure 3] This is a cross-sectional view of one embodiment of a wind power generation facility foundation according to the present invention. [Figure 4] This is a cross-sectional view of one embodiment of a wind power generation facility foundation according to the present invention. [Figure 5] This is a plan view of one embodiment of a wind power generation facility foundation according to the present invention. [Figure 6] This diagram shows a schematic method flow for fabricating the foundation for a wind power generation facility. [Modes for carrying out the invention]

[0034] Figure 1 shows a schematic three-dimensional diagram of a wind turbine 100. The wind turbine 100 has a tower 102 and a nacelle 104 located at the upper end of the tower 102. In one possible configuration, the tower 102 may be formed from multiple tower segments stacked on top of each other. The nacelle 104 houses an aerodynamic rotor 106 with three rotor blades 108. This aerodynamic rotor 106 is further equipped with a spinner 110. The aerodynamic rotor is rotated by wind during the operation of the wind turbine 100, and this rotational motion drives an electrodynamic rotor or rotor (not shown) of a generator, which is coupled to the aerodynamic rotor 106. The rotor or rotor of the generator may be directly or indirectly coupled to the aerodynamic rotor 106. The generator is located inside the nacelle 104 and generates electrical energy.

[0035] Tower 102 is fixed to the soil 120 by foundation 1, which will be explained in detail in Figures 2 to 5 below.

[0036] Figures 2a to 2c show different schematic diagrams for installing wind power generation equipment 100 with a standard tower 102 at different height levels, which is done by appropriately positioning or adapting the foundation 1.

[0037] In Figure 2a, the foundation 1 is buried in the soil 120, and in this case, by using the standard tower 102, the upper edge G of the site K Based on this, a hub height NH of 108m is achieved. Figure 2b shows the upper edge G of the site with soil 120. K The arrangement of the foundation 1 placed on the ground is shown. In this case, the foundation 1 according to the present invention is loaded with compacted soil B, and in this case, the arrangement under the use of the standard tower 102 is such that the upper edge of the site G K Based on this, a hub height of 111m (NH) becomes possible.

[0038] In the third arrangement configuration according to the present invention shown in Figure 2c, compared to the diagram shown in Figure 2b, the foundation 1 is additionally equipped with a tower base 14 having a base height greater than 5m. With the foundation 1 formed according to the present invention in this way, the upper edge of the site G when using the standard tower 102 K Based on this, a hub height NH greater than 116m is achieved. By accurately positioning the foundation 1 and using the tower base, it is possible to achieve a hub height NH greater than 8m in height difference without the need for a standard tower 102.

[0039] Figures 3 and 4 show an embodiment of a wind power generation facility foundation 1 according to the present invention, having a foundation body 2 formed from concrete F reinforced with reinforcing material 4. The foundation body 2 comprises a substantially flat base plate 6, which has a base area 8 located in its central region M. Furthermore, the foundation body 2 comprises a plurality of reinforcing ribs 10 (Figure 5) extending from the base area 8 above the base plate 6, particularly radially outward. The number of these reinforcing ribs 10 varies depending on the size of the foundation 1 and the wind power generation facility 100 to be assembled to the foundation 1, in which case the number may vary, for example, between 4 and 20 reinforcing ribs 10. The areas between the reinforcing ribs 10 above the flat base plate 6 are each filled with load soil consisting of compacted soil 120, as can be seen in Figures 3 and 4, for improved fixation of the foundation.

[0040] In one possible configuration, the base plate 6, its base area 8, and the reinforcing ribs 10 are formed from cast-in-place concrete. In another configuration, at least the reinforcing ribs 10 of the foundation body 2 may be pre-fabricated as precast concrete, and this precast concrete is then joined to the base plate 6 and the base area 8 at the installation site.

[0041] Furthermore, as can be seen from FIGS. 3 and 4, the base plate 6 and its base area 8 have a central area M with reduced or no reinforcing material 4. The base plate 6 has a thickness of less than 70 cm, preferably about 50 cm. The reinforcing ribs 10 are radially outward in their extending direction and have a decreasing rib height R H The rib height varies from a value near the base area of about 2 m to a height of about 0.8 m at the rib ends 12 in the outer peripheral area of the base plate 6.

[0042] Furthermore, a tower base 14 is arranged in the base area 8 of the base plate 6. This tower base 14 may be adapted with respect to its base height S H and is thus configured to adapt the hub height NH to the optimal target hub height NH SOLL investigated for the installation site, as described in FIGS. 2a to 2c.

[0043] The tower base 14 shown in FIG. 3 has a base height S of 3 m H and is formed, in particular, from a separate precast concrete 16 to be arranged on the upper surface of the base area 8. The tower base 14 may be formed from a plurality of annular, particularly three, such precast concretes 16 arranged stacked on top of each other. The upper surface of the tower base 14 consisting of these precast concretes 16 is closed by a foundation cover plate 18.

[0044] FIG. 4 shows an alternative embodiment of the tower base 14' formed in the base area 8 of the base plate 6. This tower base 14' is also formed from in-situ concrete, similar to the base body 2. The tower base 14' shown in FIG. 4 is monolithically connected to the base area 8 and thus to the base body 2. The tower base 14' shown in FIG. 4 has a base height S higher than 5 m H The central area M of the base area 8 and the tower base 14' is also filled with in-situ concrete, in which case the central area M is formed without any reinforcing material respectively.

[0045] As can be further seen from Figures 3 and 4, the reinforcing member 4 has an anchor cage 20 comprising a number of anchor rods 22 that extend substantially perpendicular to the base plate 6. This anchor cage 20 is configured, on the one hand, to tension the foundation 2, and on the other hand, to attach the wind turbine tower 102 to the foundation 1, in particular to the tower bases 14, 14'.

[0046] The anchor rods 22 extend from approximately the lower surface 26 of the base plate 6 through the base area 8 into the tower bases 14, 14', respectively, which are located in the base area 8. The anchor rods 22 extend particularly beyond the upper surface of the tower bases 14, 14', respectively. The anchor cage 20 further comprises at least one anchor plate 24 that extends horizontally. This anchor plate 24 is formed in an annular shape, and a plurality, preferably all, of the anchor rods 22, particularly, which are located within the foundation 1, are connected to this anchor plate 24.

[0047] In one configuration, the base plate 6 has a groove-shaped projection 36 on the lower surface 26 of the base plate 6 in the base area 8 of the foundation body 2. Preferably, an anchor rod 22 extends into this groove-shaped projection 36, and an anchor plate 24 is positioned thereon. Below the groove-shaped projection 36, a compressible insert 38 made of thermal insulation material conforming to DIN EN 13163 is positioned.

[0048] The base plate 6 has a flat upper surface 26', and in this case, a joint 28 is formed between the upper surface 26' of the base plate 6 and each of the reinforcing ribs 10 positioned on this upper surface 26', which may be formed smoothly or roughly, and in particular, may have a toothed structure. This joint 28 improves the transmission of shear forces from the reinforcing ribs 10 toward the base plate 6 and in the opposite direction, particularly in the longitudinal direction of the reinforcing ribs 10.

[0049] Figure 5 shows a plan view of the wind power generation equipment foundation 1 according to the present invention, which is formed as a ribbed foundation in the illustrated configuration. As clearly shown in Figure 5, a number of reinforcing ribs 10, in particular 16 reinforcing ribs 10, are arranged on the base plate 6 of the foundation body 2. The base plate 6 has a substantially circular outer contour U. Furthermore, a number of empty pipes 32 are laid from a housing chamber 30 accessible from the upper surface of the base area 8 to the outer contour U of the foundation body 2 or the base plate 6.

[0050] As further shown in Figure 5, the reinforcing rib 10 has a constant rib width R along its extending length. B In this case, the reinforcing rib 10 has a rib width R of 0.8 m in particular. B The base region 8 has a polygonal outer surface in the illustrated configuration. In particular, the base region 8 has a flat wall surface 34 between two adjacent reinforcing ribs 10.

[0051] The fabrication of the foundation 1 according to the present invention described above is carried out by a preferred embodiment of the method 200 illustrated in Figure 6. In the first step 201, the target hub height NH of the wind power generation equipment to be installed is determined at the installation site. SOLL Once determined or prepared, the wind power generation equipment 100 comprises a tower 102 having a predetermined standard height which is installed on tower bases 14, 14' of foundation 1. In the next step 202, a foundation body 2 is fabricated, comprising at least one base plate 6, a base area 8 formed in the base plate, and a plurality of reinforcing ribs 10 extending radially outward from the base area on the upper side of the base plate 6.

[0052] Step 202 may include, for example, multiple substeps, such as fabricating and / or preparing reinforcing materials for the foundation 2, fabricating and / or preparing formwork to surround the reinforcing materials, and at least concrete finishing the foundation 2 at the installation site.

[0053] In particular, in step 203, which will be carried out next, tower bases 14, 14' will be fabricated on the upper side of the base plate 6's base area 8. In this case, the fabrication of these tower bases 14, 14' will be carried out in step 203a, taking into account the standard tower height for the wind power generation equipment 100, and the base height S of the tower bases 14, 14' will be determined. H Base height S higher than 5m H By conforming to the target hub height NH of the wind power generation equipment 100, SOLL This includes adjusting accordingly. It also includes manufacturing the tower bases 14, 14', particularly the base height S. H The purpose of manufacturing this is to achieve the target hub height NH at the installation site of the wind power generation equipment 100. SOLL Each of these is individually adapted and carried out accordingly. [Explanation of symbols]

[0054] 1 Basics 2 Basic body 4. Reinforcement 6 Base plate 8 Area for base 10 Reinforcement Ribs 12 Rib end 14,14' Tower base 16 Precast concrete 18. Foundation cover plate 20 Anchor Cage 22 Anchor Rods 24 Anchor Plate 26 Bottom side 26' top 28 Joints 30 Confinement Rooms 32 empty tube 34 Wall surface 36 Tank-shaped protrusion 38 Inserts 100 Wind power generation facilities 102 Tower 104 Nacelle 106 Rotor 108 rotor blades 110 Spina 120 soil 200 ways 201 Steps to determine hub height 202 Steps for constructing the base structure 203 Steps to Fabricate a Tower Base B Loaded soil F Concrete G K Upper edge of the site M central area NH hub height NH SOLL Target hub height R B Rib width R H Rib height S H Base height U outer contour

Claims

1. A wind power generation equipment foundation (1) for mounting a wind power generation equipment tower (102), - It comprises a foundation body (2) formed from concrete (B) reinforced with reinforcing material (4), and the foundation body (2) is - A substantially flat base plate (6) with a base area (8), - The base plate (6) has a plurality of reinforcing ribs (10) that extend outward from the base area (8) on the upper side, In the base plate (6) the base area (8) the base height (S) is greater than 5m. Ｈ Wind power generation facility foundation (1), on which a tower base (14, 14') having ) is positioned.

2. The wind power generation facility foundation according to claim 1, wherein the base plate (6) has a substantially circular outer contour (U).

3. The wind power generation facility foundation according to claim 1 or 2, wherein the base plate (6) is formed from cast-in-place concrete.

4. The wind turbine foundation according to any one of claims 1 to 3, wherein the tower base (14, 14') and / or the reinforcing rib (10) are formed from precast concrete or cast-in-place concrete.

5. The wind power generation facility foundation according to any one of claims 1 to 4, wherein the base plate (6) and the base area (8) have a central area (M) without reinforcing material.

6. The base plate (6) has a thickness of less than 1 m, particularly less than 0.70 m, preferably about 0.50 m, according to any one of claims 1 to 5.

7. The reinforcing rib (10) has a decreasing rib height (R) that extends outward in the direction of extension. Ｈ ) and / or nearly constant rib width (R Ｂ A wind power generation facility foundation according to any one of claims 1 to 6, having )

8. The wind power generation facility foundation according to any one of claims 1 to 7, wherein the base plate (6) has a substantially flat upper surface (26), and a joint (28) is provided between the upper surface (26) of the base plate (6) and each of the reinforcing ribs (10) arranged on the upper surface (26).

9. The wind turbine foundation according to claim 8, wherein one or more corrugated metal sheet strips are arranged in adjacent component regions of the base plate (6) and the reinforcing rib (10) to form the joint (28) which is preferably trapezoidal and has a toothed row.

10. The wind power generation facility foundation according to any one of claims 1 to 9, wherein the foundation body (2) has an anchor cage (20) having a number of anchor rods (22) that extend substantially perpendicular to the base plate in at least its base area (8), and the anchor cage (20) is configured to prestress the foundation body (2) and to attach the wind power generation facility tower (102) to the foundation (1).

11. The wind power generation facility foundation according to claim 10, wherein the anchor rods (22) extend from the foundation body (2) to beyond the upper surface of the tower bases (14, 14') positioned on the foundation body (2), and / or an anchor plate (24) extending horizontally is provided inside the base area (8), the anchor plate (24) is preferably formed in an annular shape and connects a plurality of anchor rods or all of the plurality of anchor rods (22) to one another.

12. The wind power generation facility foundation according to claim 10 or 11, wherein the base plate (6) has a tank-shaped projection (36) on the lower surface (26) of the base plate (6) in the base area (8) of the foundation body (2), and preferably the anchor rod (22) extends into the tank-shaped projection (36) and the anchor plate (24) is arranged therein.

13. A wind turbine foundation (1) comprising a substantially flat base plate (6) having a base area (8), a plurality of reinforcing ribs (10) extending outward from the base area (8) on the upper side of the base plate (6), and tower bases (14, 14') positioned in the base area (8) of the base plate (6), a method (100) for manufacturing a wind turbine foundation (1) as described in any one of claims 1 to 12, wherein - At the installation site of the wind power generation equipment (100) to be installed, which includes a tower (102) having a predetermined height to be mounted on the tower base (14, 14'), the steps of determining or preparing the target hub height of the wind power generation equipment (100) and - The step of manufacturing the base body (2), - The step of manufacturing the tower base (14, 14') to be placed on the upper side of the base area (8) of the base body (2), The step of manufacturing the tower base (14, 14') takes into account the tower height of the standard tower (102) for the wind power generation equipment (100) and sets the base height (S Ｈ ) Base height (S) higher than 5m Ｈ By adjusting it to conform to the target hub height (NH) of the wind power generation equipment (100), the hub height (NH) of the wind power generation equipment (100) can be adjusted to conform to the target hub height (NH) ＳＯＬＬ A method (100) that includes the step of adjusting to ).

14. The steps for manufacturing the aforementioned base body (2) are as follows: - A step of manufacturing and / or preparing at least the reinforcing material for the foundation (2) at the installation site, wherein at least a portion of the reinforcing material is preferably formed as an anchor cage (24), - A step of manufacturing and / or preparing a formwork so as to surround the reinforcing material, - Preferably a step of preparing precast concrete forming the reinforcing ribs (10), - The steps include: pouring cast-in-place concrete into the formwork to finish the base plate (6) and the base area (8) of the foundation (2) with concrete, thereby embedding the reinforcing material almost completely within the cast-in-place concrete, and preferably, by using precast concrete as reinforcing ribs (10) along with the concrete finishing, a joint is formed between the precast concrete, the base plate (6), and the base area (8); - The height of the base (S) to be formed on the tower base (14, 14') Ｈ The method according to claim 13, comprising at least one, more, or all of the steps of: adjusting the height of the reinforcing rib (10) at the end of the foundation body (2) facing the base area (8) in accordance with )

15. The steps for manufacturing the aforementioned tower base (14, 14') are as follows: - The steps of preparing at least one precast concrete to form the tower base (14, 14'), and placing the precast concrete on the base area (8) of the hardened foundation (2), - A step of connecting the precast concrete to the reinforcing member that protrudes beyond the foundation (2), - A step of manufacturing and / or preparing reinforcing material for the tower base (14, 14') at the installation site, wherein preferably, at least a portion of the reinforcing material is formed as an anchor cage (24), - A step of manufacturing and / or preparing a formwork so as to surround the reinforcing material, The method according to claim 13 or 14, comprising at least one, more, or all of the following steps: - pouring cast-in-place concrete into the formwork to finish the tower base (14, 14') of the foundation (2), thereby embedding the reinforcing material substantially completely in the cast-in-place concrete.

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