Onshore wind power generation foundation structure, tower and wind turbine generator

Abstract

This invention discloses an onshore wind power generation foundation structure, tower, and wind turbine generator set, belonging to the technical field of wind turbine generator set towers. The foundation structure includes a soil layer with a casting groove. A casting structure is installed within the casting groove, and the casting structure has a groove. A reinforcing member is installed within the groove. The reinforcing member has an open structure at both ends and an I-shaped cross-section. An elastic concrete layer is cast inside the reinforcing member and between the reinforcing member and the inner wall of the groove. A base is provided on the upper part of the reinforcing member. A steel cage structure is installed within the base and the elastic concrete layer. Multiple bolts are provided on the upper surface of the base. By using the reinforcing member to connect the casting structure, the elastic concrete layer, and the base, the elastic concrete layer can buffer the tower and generator set after vibration or wind impact, avoiding excessive opening at the joint interface.

Description

Technical Field

[0001] This invention relates to the field of wind turbine tower technology, specifically to an onshore wind power generation foundation structure, tower, and wind turbine generator set. Background Technology

[0002] Onshore wind power generation structures include the turbine base and the upper structure such as the tower, nacelle, hub, and blades. The turbine base is a crucial component of the wind turbine structure, possessing the unique characteristic of withstanding 360-degree repeated loads and large eccentric forces; its stability is vital to ensuring the normal operation of the wind turbine generator. The turbine base bears significant horizontal loads and overturning moments from the upper structure, placing high demands on the stability and deformation control of the foundation. Common turbine base types include natural ground extended bases, ribbed plate bases, pile foundations, prestressed cylindrical bases, and rock anchor bases.

[0003] With the increasing size of wind turbine units, the loads acting on the foundation are becoming larger and larger. This requires the wind turbine foundation to provide greater rigidity and bending capacity. Currently, the common practice is to increase the diameter of the wind turbine foundation, increase the diameter of the radial reinforcement in the bottom plate, and increase the amount of reinforcement (such as reducing the spacing of the reinforcement and using multi-layer reinforcement). However, the large amount of reinforcement increases the material cost of the wind turbine foundation; the difficulty in tying the reinforcement, the small spacing of the reinforcement, and the poor concrete vibration result in poor concrete pouring quality, highlighting issues such as honeycomb and voids. At the same time, there may be problems with excessive opening at the joint interfaces after the foundation is subjected to vibration or wind impact. Summary of the Invention

[0004] The purpose of this invention is to provide an onshore wind power generation foundation structure, tower, and wind turbine generator set to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An onshore wind power generation foundation structure includes a soil layer with a casting groove. A casting structure is installed within the casting groove, and the casting structure has a groove. A reinforcing member is installed within the groove. The reinforcing member has an open structure at the top and bottom and an I-shaped cross-section. An elastic concrete layer is cast inside the reinforcing member and between the reinforcing member and the inner wall of the groove. A base is installed on the upper part of the reinforcing member. A steel cage structure is installed within the base and the elastic concrete layer. The reinforcing member is located within the steel cage structure. Multiple screws are installed on the upper surface of the base.

[0007] Preferably, the casting structure includes a base plate, on which multiple side plates are provided, forming a square structure. The abutting sides of two adjacent side plates are inclined surfaces. A number of reinforcing plates are arranged sequentially from top to bottom on the outer side of the square structure. Each reinforcing plate has multiple hollow grooves. A first concrete layer is cast between the outer wall of the square structure and the side wall of the casting groove. A second concrete layer is cast inside the square structure, and a reinforcing rib structure is provided inside the second concrete layer.

[0008] Preferably, the reinforcing rib structure includes several horizontal ribs and several vertical ribs, which are fixed together by tie wires, and each end of the horizontal rib is provided with a nut for fixing the reinforcing plate.

[0009] Preferably, the base has an extension platform at its bottom, and the upper surface of the extension platform has multiple notches, wherein extension bolts are provided at the top of multiple vertical ribs corresponding to a portion of the notches.

[0010] Preferably, an installation platform is provided between the casting structure and the extension platform, and a fixing bolt is provided on the installation platform corresponding to another part of the notch.

[0011] Preferably, foundation piles are provided at the four corners of the lower surface of the mounting platform, and the bottom ends of the foundation piles extend into the soil layer and are provided with a base plate. The foundation piles are fixed to the mounting platform by fixing bolts.

[0012] Preferably, the steel cage structure includes a plurality of transverse connecting bars arranged sequentially from top to bottom. The transverse connecting bars are in the shape of a cross and are located inside the reinforcing member. The ends of the transverse connecting bars extend out of the reinforcing member and are provided with annular connecting bars. A plurality of longitudinal connecting bars are provided on the plurality of annular connecting bars and the plurality of longitudinal connecting bars are arranged circumferentially.

[0013] A tower for onshore wind power generation, including the aforementioned onshore wind power generation foundation structure.

[0014] An onshore wind turbine generator set includes the tower of the wind turbine generator set.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention uses reinforcing members to connect the cast-in-place structure, the elastic concrete layer, and the base. This reduces the impact of vibration or wind on the tower and generator set. The elastic concrete layer can buffer the impact and avoid excessive opening at the joint interface. By setting a steel cage structure, the connection strength between the base and the elastic concrete layer can be further improved. By setting screws on the base, it is easier for subsequent workers to install the tower. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the onshore wind power generation foundation of the present invention;

[0018] Figure 2 This is an overall structural cross-sectional view of the onshore wind power generation foundation structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the soil-free structure of the onshore wind power generation foundation of the present invention.

[0020] Figure 4 This is a schematic diagram of the side plate of the onshore wind power generation foundation structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the reinforcing rib structure of the onshore wind power generation foundation structure of the present invention.

[0022] Figure 6 This is a structural schematic diagram of the reinforcing member and steel cage structure of the onshore wind power generation foundation structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the mounting platform of the onshore wind power generation foundation structure of the present invention.

[0024] Figure 8 This is a schematic diagram of the base of the onshore wind power generation foundation structure of the present invention.

[0025] In the picture:

[0026] 1. Soil layer; 2. Pouring trench; 3. Base plate; 4. Side plate; 5. Concrete layer one; 6. Horizontal reinforcement; 7. Vertical reinforcement; 8. Reinforcing plate; 9. Hollowed-out groove; 10. Reinforcing member; 11. Horizontal connecting reinforcement; 12. Circular connecting reinforcement; 13. Longitudinal connecting reinforcement; 14. Base; 15. Mounting platform; 16. Fixing bolt one; 17. Extension platform; 18. Notch; 19. Extension bolt; 20. Elastic concrete layer; 21. Concrete layer two; 22. Foundation pile; 23. Base plate; 24. Fixing bolt two; 25. Threaded rod. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1 - Figure 8 The present invention provides a technical solution:

[0029] like Figure 1 and Figure 2 As shown, an onshore wind power generation foundation structure includes a soil layer 1, a casting groove 2 on the soil layer 1, a casting structure inside the casting groove 2, a groove on the casting structure, and a U-shaped cross-section of the casting structure. A reinforcing member 10 is set inside the groove. The reinforcing member 10 has an open structure at the top and bottom and an I-shaped cross-section. An elastic concrete layer 20 is cast inside the reinforcing member 10 and between the reinforcing member 10 and the inner wall of the groove. The elastic concrete layer 20 is a new type of building material with high elasticity and flexibility. Compared with traditional concrete, it can better adapt to external influences such as temperature changes and earthquakes. This material is usually combined with polymers or other toughening components to improve its crack resistance and durability. The preparation of elastic concrete blocks generally includes the following steps: selecting suitable raw materials (such as polymer admixtures) and mixing cement, sand, crushed stone, polymer and other components in proportion. Using appropriate processes for mixing, molding, and curing, the upper part of the reinforcing member 10 is provided with a base 14. By connecting the cast-in-place structure, the elastic concrete layer 20, and the base 14 through the reinforcing member 10, the elastic concrete layer 20 can buffer when the tower and generator set are subjected to vibration or wind impact, avoiding the problem of excessive opening at the joint interface. A steel cage structure is provided in the base 14 and the elastic concrete layer 20, and the reinforcing member 10 is located in the steel cage structure. By setting the steel cage structure, the connection strength between the reinforcing member 10, the base 14, and the elastic concrete layer 20 can be further improved. Multiple screws 25 are provided on the upper surface of the base 14 to facilitate the subsequent installation of the tower by the staff.

[0030] like Figure 2 - Figure 4As shown, the casting structure includes a base plate 3, on which multiple side plates 4 are provided. The multiple side plates 4 form a square structure, and the abutting sides of two adjacent side plates 4 are inclined surfaces, which facilitates the splicing of adjacent side plates 4 by workers. Several reinforcing plates 8 are arranged sequentially from top to bottom on the outer side of the two square structures. The cross-section of the reinforcing plates 8 is L-shaped, and under the action of multiple reinforcing plates 8, they can provide a reaction force when the base settlement occurs, reducing the impact of base settlement on the foundation structure. Multiple hollow grooves 9 are opened on the reinforcing plates 8. A concrete layer is poured between the outer wall of the square structure and the side wall of the casting groove 2. 5. When pouring concrete layer 5, the concrete can flow through the hollow groove 9 onto the base plate 3, which can also effectively increase the contact area between the concrete and the reinforcing plate 8 and improve stability. A second concrete layer 21 is poured inside the square structure. When pouring concrete layer 21, the workers need to install a template inside the reinforcing rib structure and then pour the concrete between the template and the side plate 4. A reinforcing rib structure is set inside concrete layer 21. The reinforcing rib structure is laid before pouring concrete layer 21. In this embodiment, the base plate 3, the side plate 4 and the reinforcing plate 8 are all made of steel plates.

[0031] Furthermore, such as Figure 5 As shown, the reinforcing rib structure includes several horizontal ribs 6 and several vertical ribs 7. The horizontal ribs 6 and vertical ribs 7 are fixed together by tie wires. The ends of the horizontal ribs 6 are provided with nuts for fixing the reinforcing plate 8. The several horizontal ribs 6 and several vertical ribs 7 form a cavity structure with openings at the top and bottom in the middle. The reinforcing member 10 is located inside the cavity structure.

[0032] like Figure 8 As shown, the base 14 has an extension platform 17 at its bottom. The base 14 and the extension platform 17 are an integral structure. The upper surface of the extension platform 17 has multiple notches 18. The top of multiple vertical ribs 7 corresponding to some of the notches 18 is provided with extension bolts 19. The base 14 is fixed to the cast structure by the extension bolts 19. It should be noted that the diameter of the hole at the connection between the extension bolt 19 and the extension platform 17 is larger than the diameter of the extension bolt 19.

[0033] like Figure 3 As shown, an installation platform 15 is provided between the casting structure and the extension platform 17. A fixing bolt 16 is provided on the installation platform 15 corresponding to another part of the notch 18. The base 14 and the installation platform 15 are fixed by the fixing bolt 16. In this embodiment, the installation platform 15 is a steel plate. The diameter of the hole groove at the connection between the fixing bolt 16 and the extension platform 17 is larger than the diameter of the fixing bolt 16.

[0034] Furthermore, foundation piles 22 are provided at the four corners of the lower surface of the mounting platform 15. The bottom end of the foundation piles 22 extends into the soil layer 1 and is provided with a base plate 23. The foundation piles 22 are fixed to the mounting platform 15 by fixing bolts 24. The bottom end of the foundation piles 22 extends into the hard soil layer in the soil layer 1.

[0035] Specifically, by setting the diameter of the hole at the connection between the extension bolt 19 and the extension platform 17 to be larger than the diameter of the extension bolt 19, and the diameter of the hole at the connection between the fixing bolt 16 and the extension platform 17 to be larger than the diameter of the fixing bolt 16, the elastic concrete layer 20 can first buffer when the tower or generator set is subjected to vibration or wind impact. When the vibration or wind impact is large, the mounting platform 15, foundation pile 22, base plate 23 and the cast-in-place structure can limit the displacement of the tower, thereby improving the stability of the tower.

[0036] like Figure 6 As shown, the steel cage structure includes multiple transverse connecting bars 11 arranged sequentially from top to bottom. The transverse connecting bars 11 have a cross-shaped structure and are located inside the reinforcing member 10. The ends of the transverse connecting bars 11 extend out of the reinforcing member 10 and are provided with annular connecting bars 12. Multiple longitudinal connecting bars 13 are provided on the multiple annular connecting bars 12 and are arranged in a circumferential manner.

[0037] A tower for onshore wind power generation, including an onshore wind power generation foundation structure.

[0038] An onshore wind turbine generator set includes a tower for the wind turbine generator set.

[0039] The workflow of this embodiment is as follows: When constructing the onshore wind power generation foundation structure, the workers select a suitable area on the soil layer 1 to excavate the pouring trench 2, and then assemble the base plate 3, side plate 4 and reinforcing rib structure. After the assembly is completed, the above structure is placed at the bottom of the pouring trench 2 by a crane, and then the template is installed in the cavity structure inside the reinforcing rib structure. Then, concrete layer 5 and concrete layer 21 are poured. After concrete layer 5 and concrete layer 21 solidify, the reinforcing member 10 and the steel cage structure are placed in the groove, and then the elastic concrete layer 20 is poured. After the elastic concrete layer 20 solidifies, the installation platform 15 and the base 14 are installed.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An onshore wind power foundation structure comprising a layer of earth, characterized in that, The pouring groove is provided on the soil layer, and a pouring structure is arranged in the pouring groove.

2. An onshore wind power generation foundation structure according to claim 1, characterized in that, The pouring structure comprises a base plate, and a plurality of side plates are arranged on the base plate.

3. An onshore wind power foundation structure according to claim 2, characterized in that, The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure.

4. An onshore wind power foundation structure according to claim 3, characterized in that, The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure.

5. An onshore wind power generation foundation structure according to claim 4, characterised in that, The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure.

6. An onshore wind power generation foundation structure according to claim 5, characterised in that, The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure.

7. An onshore wind power generation foundation structure according to claim 1, characterized in that, The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure.

8. A tower for a land-based wind power generator unit, characterized in that The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure.

9. A land-based wind power plant, characterized in that The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure. The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure. The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure. The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure. The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure. The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure. The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure. The base plate is provided with a plurality of side plates, and the plurality of side plates form a square structure. 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