Cylindrical foundation structure for a wind turbine and wind turbine

Abstract

The application discloses a cylinder type foundation structure of a wind driven generator and the wind driven generator. The cylinder type foundation structure of the wind driven generator comprises a bearing platform and a cylinder body. The bearing platform is suitable for being connected with a tower drum of the wind driven generator. The cylinder body is arranged below the bearing platform and is connected with the bearing platform. The cylinder body comprises a plurality of pile bodies. The plurality of pile bodies are continuously arranged along an annular track and are enclosed to form a closed annular structure. In the axial direction of the pile body, any two adjacent pile bodies are embedded with each other from the bottom of the pile body to the top of the pile body, so that there is no gap between the two adjacent pile bodies. The technical scheme provided by the application changes the force transmission mode of the foundation by using the reaction force of the soil on the cylinder body to resist the overturning moment borne by the upper part of the wind driven generator, and solves the problems of the large occupation area and large excavation of the traditional expanded foundation or pile foundation. Therefore, the cylinder type foundation can reduce the foundation occupation area, improve the adaptability in the limited site, increase the potential site and reduce the land acquisition cost.

Description

Technical Field

[0001] This application relates to the field of wind turbine technology, and in particular to a cylindrical foundation structure for a wind turbine and a wind turbine generator. Background Technology

[0002] With the development of the clean energy industry, the installed capacity of wind turbines continues to expand. Their foundation structures need to bear vertical loads, wind loads, and overturning moments, which places extremely high demands on strength, stability, and durability, directly affecting the benefits of wind power projects.

[0003] In existing technologies, the commonly used foundations for onshore wind power are spread foundations and pile foundations. Spread foundations require sufficient self-weight and base area to achieve resistance to overturning moment and base pressure diffusion; pile foundations resist overturning moment through the vertical bearing capacity of the piles, but due to limitations in pile cap structure and pile spacing, their bearing size and footprint are still relatively large. With the development of onshore wind power, turbine site conditions are diverse, and some scenarios restrict foundation size and footprint, which traditional foundations cannot meet, and may even require abandoning some turbine sites due to foundation size limitations. Utility Model Content

[0004] The purpose of this application is to provide a cylindrical foundation structure for a wind turbine and a wind turbine generator, which can reduce the foundation footprint, improve adaptability in restricted sites, increase potential turbine sites, and reduce land acquisition costs.

[0005] In a first aspect, this utility model provides a cylindrical foundation structure for a wind turbine, comprising:

[0006] The foundation is suitable for connection to the tower of a wind turbine.

[0007] A cylindrical body is located below and connected to the foundation. The cylindrical body includes multiple piles, which are continuously arranged along a circular trajectory and enclose to form a closed ring structure. Along the axial direction of the piles, any two adjacent piles are interlocked from the bottom to the top of the piles to ensure that there are no gaps between the two adjacent piles.

[0008] Beneficial effects: During the construction of the cylindrical foundation structure of this wind turbine, the circular outline of the cylinder and the installation positions of each pile are first laid out on the site; then, multiple piles are driven into the foundation along the circular trajectory, ensuring that any adjacent piles are continuously fitted together along the axial direction (from bottom to top) without gaps, forming a closed cylinder that is integrally connected; finally, a bearing platform is constructed on the top of the cylinder and firmly connected to the cylinder to complete the foundation construction.

[0009] When a cylindrical foundation has a tendency to overturn, the cylinder will tilt to one side, compressing the soil on the outside of the cylinder. This compressed soil generates a reaction force, which counteracts the overturning moment borne by the wind turbine, altering the foundation's force transmission pattern and solving the problems of large footprint and extensive excavation associated with traditional spread foundations or pile foundations. Therefore, cylindrical foundations can reduce the foundation footprint, improve adaptability in confined sites, increase potential turbine locations, and reduce land acquisition costs.

[0010] Meanwhile, the adjacent piles interlock from bottom to top, forming a complete, seamless cylindrical structure. This not only enhances the overall rigidity and strength of the cylindrical structure but also effectively blocks groundwater seepage, improving the foundation's durability and anti-buoyancy stability.

[0011] Furthermore, during the construction of the cylindrical structure, it is only necessary to insert the piles one by one into the foundation and ensure that adjacent piles interlock to form the cylindrical structure. This method eliminates the need for deep foundation pit excavation and complex support, significantly reducing construction difficulty and risk. It is simple in process, highly efficient, has a short cycle, and offers better overall cost.

[0012] In one optional embodiment, the pile body includes an inner core pipe pile and an outer core mixing pile, wherein the outer core mixing pile is coaxially arranged around the outer surface of the inner core pipe pile, and the outer core mixing pile portions of any two adjacent pile bodies are interlocked.

[0013] Beneficial effects: The coaxial combination of inner core pipe piles and outer core mixing piles forms a pile body. The inner core pipe piles provide strong axial bearing capacity and shear stiffness, while the outer core mixing piles effectively protect the inner core and expand the stress area, dispersing the load. The improved performance of individual piles directly translates into high stiffness and high stability of the entire cylindrical structure, enabling the cylindrical structure to better resist the complex loads of wind turbines.

[0014] In one alternative embodiment, the inner core tube pile has a receiving cavity extending along its axial direction, and at least one anchor is provided in the receiving cavity. The anchor has an extension that extends outward from the top of the inner core tube pile and is embedded in the pile cap and fixedly connected to the pile cap.

[0015] Beneficial effects: Wind turbines generate complex forces such as vertical pressure, horizontal wind load, and overturning moment during operation. As the core load-bearing component, the inner core pipe pile's internal anchors directly transfer these loads to the foundation cap through their extensions, preventing stress concentration or force transmission interruption at the connection point between the pipe and the foundation cap. In particular, by embedding and fixing the anchor extensions into the foundation cap, pull-out and horizontal shear forces can be effectively transferred, preventing relative displacement or separation between the foundation cap and the pipe, ensuring overall foundation stability, and meeting the stringent load-bearing requirements of wind turbine foundations.

[0016] In one alternative implementation, the anchors are provided in multiple forms;

[0017] Along the axial direction of the pile body, from the bottom to the top of the pile body, the extension gradually moves away from the axis of the pile body.

[0018] Beneficial effects: Multiple extensions gradually move away from the pile axis from the bottom to the top of the pile, forming an inverted cone-shaped force transmission structure. This structure can transfer the concentrated load at the top of the pile layer by layer and evenly to a larger area of ​​the pile cap, effectively avoiding stress concentration, preventing pile cap cracking, and significantly improving the bearing capacity and durability of the joint.

[0019] In one alternative embodiment, a support plate is provided within the receiving cavity, and the support plate is fixedly connected to the end of the anchor.

[0020] Beneficial effects: By placing the support plate within the cavity and fixing it directly to the end of the anchor, a stable bearing surface is provided for the anchor. This allows the anchor to more effectively and evenly transfer the force to the core material of the pile (such as concrete), rather than concentrating it at the weld or connection point between the anchor and the pile wall. Without the support plate, the end of the anchor may sink into the relatively soft concrete due to stress concentration, leading to localized crushing failure.

[0021] In one alternative embodiment, the inner core pipe pile is inserted into the outer core mixing pile by hammering or static pressure.

[0022] Beneficial effects: After the outer core mixing pile is constructed, the inner core pipe pile can be implanted immediately, resulting in a compact and continuous process. The hammering or static pressure process itself exerts a physical effect on the contact surface of the two materials. The strong compressive force ensures that the outer surface of the inner core pipe pile and the inner surface of the outer core mixing pile are tightly bonded, forming a high-quality interface. This helps the two materials work together better, more effectively transferring axial and shear forces, thereby potentially improving the overall load-bearing capacity of the pile.

[0023] In one alternative embodiment, the cylinder is a ring structure.

[0024] Beneficial effects: With the same amount of material, the ring structure has a stronger ability to resist torsional deformation, which is crucial for structures subjected to horizontal forces, seismic forces, or moments. When the cylinder is subjected to uniform internal or external pressure, the ring structure can distribute the stress evenly across the entire circumference, avoiding stress concentration and making the cylinder structure more stable and durable.

[0025] In one alternative embodiment, the cylindrical body has a square ring structure.

[0026] Beneficial effects: The square ring structure also has a strong ability to resist torsional deformation, which is crucial for structures that are subjected to horizontal forces, seismic forces or moments, and can make the cylindrical structure more stable and durable.

[0027] In one alternative embodiment, the pile is a cylindrical structure.

[0028] Beneficial effects: The cylindrical cross-section has consistent mechanical properties in all directions. Regardless of whether it is subjected to vertical pressure, horizontal force or overturning moment, the load can be evenly transferred to the pile and the surrounding soil, avoiding local stress concentration caused by the sharp corners of the cross-section, and greatly reducing the risk of pile cracking or local crushing. It is especially suitable for wind turbine foundations that need to withstand complex dynamic loads for a long time.

[0029] Secondly, this utility model also provides a wind turbine generator, comprising:

[0030] Tower;

[0031] The cylindrical foundation structure of the wind turbine has a foundation platform connected to the bottom of the tower.

[0032] Beneficial effects: This wind turbine, because it includes a cylindrical foundation structure, has the same technical effects as a cylindrical foundation structure, which will not be elaborated here. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a structural cross-sectional view of the cylindrical foundation structure of a wind turbine generator according to one embodiment provided in this application;

[0035] Figure 2 This is a cross-sectional view of a cylindrical foundation structure of a wind turbine installed in the ground according to one embodiment of the present application;

[0036] Figure 3 This is a cross-sectional view of the cylindrical body in the cylindrical foundation structure of a wind turbine generator according to one embodiment provided in this application;

[0037] Figure 4 yes Figure 3 Enlarged schematic diagram of two adjacent piles;

[0038] Figure 5 This is a cross-sectional view of the pile body in the cylindrical foundation structure of a wind turbine in one embodiment provided in this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 100. Platform;

[0041] 200. Tower;

[0042] 300. Cylinder body; 310. Pile body; 311. Inner core pipe pile; 3111. Receiving cavity; 3112. Anchor; 31121. Extension; 3113. Support plate; 312. Outer core mixing pile;

[0043] 400. Foundation. Detailed Implementation

[0044] In related technologies, the commonly used foundations for onshore wind power are spread foundations and pile foundations. Spread foundations need to rely on sufficient self-weight and base area to achieve resistance to overturning moment and base pressure diffusion; pile foundations resist overturning moment through the vertical bearing capacity of the piles, but due to limitations in pile cap structure and pile spacing, their bearing size and footprint are still relatively large. With the development of onshore wind power, turbine site conditions are diverse, and some scenarios restrict foundation size and footprint, which traditional foundations cannot meet, and may even require abandoning some turbine sites due to foundation size limitations.

[0045] Throughout the research and development process of this application, the core objective was to adapt the wind turbine foundation to small-sized turbine sites. This meant significantly reducing the footprint of the foundation while ensuring its ability to stably resist the overturning moment generated during wind turbine operation. Based on this objective, the initial proposed technical solution involved driving a larger number of piles into the soil within a small turbine site area and significantly increasing the depth of each pile. The aim was to leverage the increased number and depth of piles to guarantee the overall pull-out resistance, vertical bearing capacity, and overturning resistance of the foundation, thereby meeting the mechanical performance requirements of the wind turbine foundation.

[0046] However, this initial plan revealed significant flaws in practical application, with the core issues focusing on construction cost and feasibility. On the one hand, the increased number of piles directly led to a surge in the consumption of main materials such as steel and cement, while also requiring more construction equipment and labor, and simultaneously increasing the complexity of the procedures. On the other hand, the increased pile depth not only prolonged the pile driving operation time but also potentially incurred additional ground treatment costs due to the need to penetrate deeper and more complex strata (such as hard soil layers and gravel layers), further pushing up the overall construction cost. In addition, densely arranging multiple long piles within a small-sized machine site places construction precision requirements far exceeding those of conventional scenarios, easily leading to problems such as pile position deviation and pile damage, which not only reduces construction efficiency but also poses potential risks to the subsequent safety and stability of the foundation.

[0047] Based on this, the inventors of this application have redesigned the cylindrical foundation structure of the wind turbine. During construction, the circular outline of the cylinder and the installation positions of each pile are first laid out on the site. Then, multiple piles are driven into the foundation along the circular trajectory, ensuring that any adjacent piles are continuously fitted together along the axial direction (from bottom to top) without gaps, forming a closed cylinder that is integrally connected. Finally, a foundation is constructed on the top of the cylinder and firmly connected to the cylinder to complete the foundation construction.

[0048] When a cylindrical foundation has a tendency to overturn, the cylinder will tilt to one side, compressing the soil on the outside of the cylinder. This compressed soil generates a reaction force, which counteracts the overturning moment borne by the wind turbine, altering the foundation's force transmission pattern and solving the problems of large footprint and extensive excavation associated with traditional spread foundations or pile foundations. Therefore, cylindrical foundations can reduce the foundation footprint, improve adaptability in confined sites, increase potential turbine locations, and reduce land acquisition costs.

[0049] Meanwhile, the adjacent piles interlock from bottom to top, forming a complete, seamless cylindrical structure. This not only enhances the overall rigidity and strength of the cylindrical structure but also effectively blocks groundwater seepage, improving the foundation's durability and anti-buoyancy stability.

[0050] Furthermore, during the construction of the cylindrical structure, it is only necessary to insert the piles one by one into the foundation and ensure that adjacent piles interlock to form the cylindrical structure. This method eliminates the need for deep foundation pit excavation and complex support, significantly reducing construction difficulty and risk. It is simple in process, highly efficient, has a short cycle, and offers better overall cost.

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0052] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0053] According to embodiments of the present invention, on the one hand, such as Figures 1 to 5 As shown, a cylindrical foundation structure for a wind turbine is provided, including a foundation 100 and a cylindrical body 300.

[0054] Specifically, such as Figure 1 and Figure 2 As shown, the pier 100 is equivalent to the base of the wind turbine tower 200 on the ground. The pier 100 is connected to the tower 200, and the tower 200 is firmly fixed through the pier 100.

[0055] Specifically, such as Figures 1 to 4 As shown, the cylindrical body 300 is located below the foundation 100 and is connected to the bottom of the foundation 100. The cylindrical body 300 includes multiple piles 310, which are continuously arranged along a circular trajectory and enclose a closed ring structure.

[0056] Specifically, such as Figures 1 to 4 As shown, along the axial direction of the pile body 310, from the bottom to the top of the pile body 310, any two adjacent pile bodies 310 are interlocked to ensure that there is no gap between any two adjacent pile bodies 310.

[0057] During construction of the cylindrical foundation structure of this wind turbine, the annular outline of the cylindrical body 300 and the installation positions of each pile 310 are first laid out on the site. Then, multiple piles 310 are driven into the foundation 400 along the annular trajectory, ensuring that any adjacent piles 310 are continuously fitted together along the axial direction (from bottom to top) without gaps, forming an integrally connected closed cylindrical body 300. Finally, a foundation 100 is constructed on the top of the cylindrical body 300 and firmly connected to the cylindrical body 300 to complete the foundation construction.

[0058] When a cylindrical foundation has a tendency to overturn, the cylindrical section 300 will tilt to one side, compressing the soil outside the section 300. This compressed soil generates a reaction force, which counteracts the overturning moment borne by the wind turbine, altering the foundation's force transmission mode and solving the problems of large footprint and extensive excavation associated with traditional spread foundations or pile foundations. Therefore, cylindrical foundations can reduce the foundation's footprint, improve adaptability to confined sites, increase potential turbine locations, and reduce land acquisition costs.

[0059] Meanwhile, the adjacent piles 310 are interlocked from bottom to top to form a complete, seamless cylindrical structure 300, which not only enhances the overall rigidity and strength of the cylindrical structure 300, but also effectively blocks groundwater seepage and improves the durability and anti-buoyancy stability of the foundation.

[0060] Furthermore, during the construction of the cylindrical shell 300, it is only necessary to insert the piles 310 one by one into the foundation 400 and ensure that adjacent piles 310 interlock to form the shell. This method eliminates the need for deep foundation pit excavation and complex support, significantly reducing construction difficulty and risk. It is simple, efficient, and has a short cycle time, resulting in a more favorable overall cost.

[0061] Specifically, the top of the cylinder 300 can be directly embedded into the foundation 100, achieving a reliable connection between the cylinder 300 and the foundation 100. Alternatively, flanges can be pre-embedded in the top of the cylinder 300 and the bottom of the foundation 100, and connected by high-strength bolts. Or, a reliable connection between the cylinder 300 and the foundation 100 can be achieved through reinforced concrete pouring. In this embodiment, no specific limitations are placed on the connection method between the cylinder 300 and the foundation 100.

[0062] Specifically, during construction, to achieve interlocking between two piles 310, an intermittent skip-driving method can be used. For example: first construct the odd-numbered piles 310, following the order of pile 1, pile 310, pile 5, and so on, constructing all odd-numbered piles 310 first. Then construct the even-numbered piles 310, waiting for the cement-soil mixture of the odd-numbered piles 310 to reach a certain strength before constructing piles 2, 4, 6, and so on. When constructing pile 2 310, its construction position partially overlaps with the completed piles 1 and 3 310. The mixing head will cut and mix this overlapping area, ensuring complete mixing of the old and new cement-soil mixture, forming a strong interlocking structure.

[0063] Specifically, the cylinder 300 can be in the form of a circular ring structure, a square ring structure, a polygonal ring structure, etc. In this embodiment, the shape of the cylinder 300 is not specifically limited.

[0064] In one embodiment, such as Figure 3 and Figure 4 As shown, the pile body 310 includes an inner core pipe pile 311 and an outer core mixing pile 312. The outer core mixing pile 312 is disposed on the outer surface of the inner core pipe pile 311 and is coaxially arranged with the inner core pipe pile 311. The outer core mixing piles 312 of any two adjacent pile bodies 310 are interlocked.

[0065] The pile body 310 is formed by the coaxial combination of the inner core pipe pile 311 and the outer core mixing pile 312. The inner core pipe pile 311 provides strong axial bearing capacity and shear stiffness, while the outer core mixing pile 312 effectively protects the inner core and expands the stress area and disperses the load. The improved performance of a single pile body 310 directly translates into high stiffness and high stability of the entire cylinder 300 structure, enabling the cylinder 300 to better resist the complex loads of the wind turbine.

[0066] By using techniques such as intermittent skipping, the outer core mixing piles 312 of adjacent pile bodies 310 can be naturally interlocked, transforming the complex structural connection into a simple construction procedure. No additional components are required, which effectively simplifies construction, ensures the quality of the finished pile, improves construction efficiency, and reduces costs.

[0067] Specifically, the inner core pipe pile 311 can be a steel pipe pile, a prestressed concrete pipe pile, etc. In this embodiment of the application, the type of inner core pipe pile 311 is not specifically limited.

[0068] Specifically, the outer core mixing pile 312 can be a cement-soil mixing pile, a high-pressure jet grouting pile, etc. In this embodiment, the type of outer core mixing pile 312 is not specifically limited.

[0069] In one embodiment, such as Figure 2 and Figure 5 As shown, the inner core pipe pile 311 has a receiving cavity 3111, which extends along the axial direction of the inner core pipe pile 311. An anchor 3112 is provided within the receiving cavity 3111, with at least one anchor 3112. An extension 31121 is provided above the anchor 3112, extending outward from the top of the inner core pipe pile 311 and embedded within the pile cap 100 for fixed connection.

[0070] During wind turbine operation, complex forces such as vertical pressure, horizontal wind load, and overturning moment are generated. The inner core pile 311, as the core load-bearing component, uses its internal anchors 3112 to directly transfer these loads to the foundation 100 via extensions 31121, preventing stress concentration or interruption of load transmission at the connection point between the cylinder 300 and the foundation 100. In particular, by embedding and fixing the extensions 31121 of the anchors 3112 into the foundation 100, pull-out force and horizontal shear force can be effectively transferred, preventing relative displacement or separation between the foundation 100 and the cylinder 300, ensuring overall foundation stability, and meeting the stringent load-bearing requirements of wind turbine foundations.

[0071] Anchors 3112 are pre-installed within the cavity 3111 of the inner core pipe pile 311, allowing for simultaneous installation during pipe pile production without additional on-site excavation or drilling, thus reducing damage to the pile structure 310. The extension 31121 extends directly from the top of the pipe pile and embeds itself into the pile cap 100, requiring only simultaneous fixing during pile cap 100 pouring, eliminating the need for complex connecting components (such as flanges and bolts). The entire connection process seamlessly integrates with the pipe pile construction and pile cap 100 pouring procedures, simplifying construction steps, shortening the construction period, and reducing the precision requirements and operational difficulty of on-site construction.

[0072] Specifically, the anchor 3112 can be made of steel bars, steel cages, prestressed steel strands, steel structure connectors, etc. In this embodiment, the type of anchor 3112 is not specifically limited.

[0073] During on-site construction, taking the steel reinforcement cage as an example, the anchor 3112 can be fixed and installed in the cavity 3111 by welding or wire tying.

[0074] In one embodiment, such as Figure 5 As shown, multiple anchors 3112 are provided, and the multiple anchors 3112 are arranged at intervals. Along the axial direction of the pile body 310, from the bottom of the pile body 310 to the top of the pile body 310, the extension 31121 gradually moves away from the axis of the pile body 310.

[0075] Multiple extensions 31121 extend from the bottom of the pile body 310 to the top of the pile body 310, gradually moving away from the axis of the pile body 310, forming an inverted cone-shaped force transmission structure. This structure can transfer the concentrated load at the top of the pile body 310 layer by layer and evenly to a larger area of ​​the pile cap 100, effectively avoiding stress concentration, preventing the pile cap 100 from cracking, and significantly improving the bearing capacity and durability of the joint.

[0076] The layout of the extension 31121, which gradually moves away from the axis of the pile body 310 from bottom to top, allows multiple extensions 31121 to connect to different positions inside the pile cap 100, significantly enhancing the mutual restraint between the pile body 310 and the pile cap 100, ensuring the firmness of the connection between the pile body 310 and the pile cap 100, and further integrating the pile body 310 and the pile cap 100 into a whole structure, improving the overall performance and reliability of the connection node.

[0077] Specifically, the multiple anchors 3112 can be evenly spaced or arranged in a ring array. In this embodiment, the distribution of the anchors 3112 is not specifically limited.

[0078] In one embodiment, such as Figure 5 As shown, a support plate 3113 is also provided inside the cavity 3111, wherein the support plate 3113 is fixedly connected to the end of the anchor 3112.

[0079] The support plate 3113 is placed within the receiving cavity 3111 and is directly fixed to the end of the anchor 3112, providing a stable bearing surface for the anchor 3112. This allows the anchor 3112 to more effectively and evenly transfer the force it receives to the core material (such as concrete) of the pile 310, rather than concentrating it at the weld or connection point between the anchor 3112 and the pile wall. Without the support plate 3113, the end of the anchor 3112 may sink into the relatively soft concrete due to stress concentration, leading to localized crushing failure.

[0080] Specifically, during factory prefabrication, all anchors 3112 can be welded or assembled with the support plate 3113 into a complete component. During construction, the entire component can be placed into the receiving cavity 3111 of the pile body 310, eliminating the need to adjust and fix the anchors 3112 individually in a narrow space, thus improving installation efficiency and accuracy.

[0081] In one embodiment, the inner core pipe pile 311 is inserted into the outer core mixing pile 312 by hammering or static pressure.

[0082] After the outer core mixing pile 312 is constructed, the inner core pipe pile 311 can be implanted. The process is compact and highly continuous. The hammering or static pressing process itself will have a physical effect on the contact surface of the two materials. The strong extrusion force will make the outer surface of the inner core pipe pile 311 and the inner surface of the outer core mixing pile 312 fit tightly together, forming a high-quality interface bonding surface. This helps the two materials to work together better and transmit axial force and shear force more effectively, thereby potentially improving the bearing capacity of the entire pile body 310.

[0083] In one embodiment, such as Figures 1 to 3 As shown, the cylinder 300 has a circular ring structure.

[0084] With the same amount of material, the ring structure has a stronger ability to resist torsional deformation, which is crucial for structures subjected to horizontal forces, seismic forces, or moments. When the cylinder 300 is subjected to uniform internal or external pressure, the ring structure can distribute the stress evenly across the entire circumference, avoiding stress concentration and making the cylinder 300 structure more stable and durable.

[0085] In one embodiment, such as Figures 1 to 3 As shown, the cylinder 300 has a square ring structure.

[0086] The square ring structure also has a strong ability to resist torsional deformation, which is crucial for structures that are subjected to horizontal forces, seismic forces or moments, making the cylindrical 300 structure more stable and durable.

[0087] In one embodiment, such as Figure 3 and Figure 4 As shown, pile 310 is a cylindrical structure.

[0088] The cylindrical cross-section has consistent mechanical properties in all directions. Regardless of whether it is subjected to vertical pressure, horizontal force or overturning moment, the load can be evenly transferred to the pile 310 and the surrounding soil, avoiding local stress concentration caused by the sharp corners of the cross-section, and greatly reducing the risk of cracking or local crushing of the pile 310. It is especially suitable for the needs of wind turbine foundations that need to withstand complex dynamic loads for a long time.

[0089] According to an embodiment of the present invention, another aspect provides a wind turbine generator comprising: a tower 200 and a cylindrical foundation structure.

[0090] Specifically, the foundation 100 is connected to the bottom of the tower 200.

[0091] This wind turbine, because it includes a cylindrical foundation structure, has the same technical effects as a cylindrical foundation structure, and will not be elaborated further here.

[0092] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.

[0093] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0094] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0095] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A cylindrical foundation structure for a wind turbine, characterized in that, include: A pier (100) is adapted to be connected to the tower (200) of a wind turbine. A cylindrical body (300) is located below the foundation (100) and connected to the foundation (100). The cylindrical body (300) includes a plurality of piles (310). The plurality of piles (310) are continuously arranged along a circular trajectory and enclosed to form a closed ring structure. Along the axial direction of the piles (310), any two adjacent piles (310) are interlocked from the bottom to the top of the piles (310) so that there is no gap between the two adjacent piles (310).

2. The cylindrical foundation structure of the wind turbine generator according to claim 1, characterized in that, The pile body (310) includes an inner core pipe pile (311) and an outer core mixing pile (312). The outer core mixing pile (312) is coaxially arranged around the outer surface of the inner core pipe pile (311), and the outer core mixing pile (312) portions of any two adjacent pile bodies (310) are interlocked.

3. The cylindrical foundation structure of the wind turbine generator according to claim 2, characterized in that, The inner core pipe pile (311) has a receiving cavity (3111) extending along its axial direction. At least one anchor (3112) is provided in the receiving cavity (3111). The anchor (3112) is provided with an extension (31121). The extension (31121) extends outward from the top of the inner core pipe pile (311) and is embedded in the bearing platform (100) and fixedly connected to the bearing platform (100).

4. The cylindrical foundation structure of the wind turbine generator according to claim 3, characterized in that, The anchor (3112) is provided in multiple forms; Along the axial direction of the pile body (310), from the bottom of the pile body (310) to the top of the pile body (310), the extension (31121) gradually moves away from the axis of the pile body (310).

5. The cylindrical foundation structure of the wind turbine generator according to claim 3, characterized in that, The cavity (3111) is provided with a support plate (3113), and the support plate (3113) is fixedly connected to the end of the anchor (3112).

6. The cylindrical foundation structure of the wind turbine generator according to claim 2, characterized in that, The inner core pipe pile (311) is inserted into the outer core mixing pile (312) by hammering or static pressure.

7. The cylindrical foundation structure of the wind turbine according to any one of claims 1 to 6, characterized in that, The cylindrical body (300) has a circular ring structure.

8. The cylindrical foundation structure of the wind turbine according to any one of claims 1 to 6, characterized in that, The cylindrical body (300) has a square ring structure.

9. The cylindrical foundation structure of the wind turbine according to any one of claims 1 to 6, characterized in that, The pile body (310) is a cylindrical structure.

10. A wind turbine generator, characterized in that, include: Tower (200); The cylindrical foundation structure of the wind turbine according to any one of claims 1 to 9, wherein the pier (100) is connected to the bottom of the tower (200).

Images