Tower structure and wind turbine generator system including the same

Abstract

The utility model provides a kind of tower tube structure and wind turbine generator unit comprising the tower tube structure, the tower tube structure includes concrete structure and multiple anchor bolts, the axial first end of the anchor bolt is provided with anchoring section, and the anchoring section of multiple anchor bolts is set to the concrete structure, and the anchoring section of at least two anchor bolts is set to each other in the radial direction and / or height direction of the concrete structure. According to the embodiment of the utility model, the problem of stress concentration in the concrete structure can be effectively solved.

Description

Technical Field

[0001] This utility model relates to a tower structure and a wind turbine generator set including the tower structure, specifically to a tower structure that improves the stress concentration problem of anchor bolts and a wind turbine generator set including the tower structure. Background Technology

[0002] Wind turbine generators are devices that convert wind energy into electrical energy. Wind energy is currently the most technologically mature and largest-scale renewable energy source in the field of clean energy. With increasingly stringent environmental protection requirements, wind power generation technology has developed rapidly.

[0003] In the tower structure of wind turbine generators, anchor bolts, as the core components connecting the steel and concrete structures, directly affect the load-bearing safety and long-term service performance of the overall structure due to their anchoring reliability. As the height of wind turbine towers continues to increase and the loads on the tower structure rise, anchor bolts need to cope with more complex load conditions, including pull-out forces, shear forces, and long-term alternating loads. This places higher demands on the uniformity of stress transfer in the concrete.

[0004] Currently, stress concentration in anchor bolts is a particularly prominent issue, making it difficult to achieve uniform stress diffusion within the concrete and easily leading to stress peaks at the anchor bolt root and concrete interface. As tower height increases and operating time accumulates, the concrete damage caused by stress concentration can further loosen the anchor bolts, affecting the safe operation of the tower.

[0005] Therefore, effectively promoting stress dispersion in concrete and avoiding local stress concentration has become a key technical requirement for improving the anchoring reliability of anchor bolts and ensuring the long-term safe operation of tower structures. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides a tower structure that can effectively solve the stress concentration problem and a wind turbine generator set including the tower structure.

[0007] According to one aspect of the present invention, a tower structure is provided, the tower structure comprising a concrete structure and a plurality of anchor bolts, wherein an anchoring section is provided at the first axial end of each anchor bolt, the anchoring sections of the plurality of anchor bolts are disposed in the concrete structure, and the anchoring sections of at least two anchor bolts are staggered from each other in the radial and / or height directions of the concrete structure.

[0008] The tower structure may include multiple concrete tower sections stacked on top of each other, and the concrete structure is the uppermost tower section among the multiple concrete tower sections.

[0009] The first end of the anchor bolt can be pre-embedded in the concrete structure.

[0010] The inner wall of the concrete structure may be provided with a boss, and at least a portion of the anchoring section of the plurality of anchor bolts has its end exposed on the lower surface of the boss.

[0011] The tower structure may include a tower body and a tower foundation disposed below the tower body, the concrete structure being the tower foundation, and the first axial end of the anchor bolt being pre-embedded in the tower foundation.

[0012] Multiple anchor bolts may be arranged at circumferential intervals along the concrete structure, and the anchoring sections of two adjacent anchor bolts are staggered in the height direction of the concrete structure.

[0013] The plurality of anchors may include a plurality of first anchors and a plurality of second anchors, the first anchors and the second anchors being arranged alternately in the circumferential direction of the concrete structure, the anchorage sections of the plurality of first anchors being arranged at a first height of the concrete structure, and the anchorage sections of the plurality of second anchors being arranged at a second height of the concrete structure, the first height being above the second height.

[0014] The distance between the anchoring sections of two adjacent anchors in the height direction of the concrete structure is greater than 50% of the length of the anchoring section.

[0015] Multiple anchor bolts may be arranged at intervals along the circumference of the concrete structure, and the anchoring sections of two adjacent anchor bolts are set on two virtual circles with different diameters. The difference in radii between the two virtual circles is greater than the maximum diameter or side length of the anchoring section in the axial direction of the concrete structure.

[0016] The tower structure may further include a steel tower section, and the axial second ends of the plurality of anchor bolts are connected to the steel tower section.

[0017] The anchor bolt may include an anchor rod and an anchoring assembly. The anchoring assembly is connected to the first end of the anchor rod to form the anchoring section. The anchoring assembly includes an anchor plate, a first nut, and a second nut. The first nut, the anchor plate, and the second nut are sleeved on the first end of the anchor rod. The anchor plate is cylindrical. The first nut and the second nut are threaded to the anchor rod at both ends of the anchor plate.

[0018] The anchor plate may include a cylindrical anchor plate body, and a first flange and a second flange located at both ends of the anchor plate body and extending outward along the radial direction of the anchor plate body, wherein the first nut and the second nut abut against the first flange and the second flange, respectively.

[0019] According to another aspect of the present invention, a wind turbine generator set is provided, the wind turbine generator set including the tower structure as described above.

[0020] According to embodiments of this utility model, by staggering the anchoring sections of adjacent anchor bolts in the radial and / or vertical directions of the concrete structure, stress in the concrete structure can be effectively diffused.

[0021] According to an embodiment of the present invention, by setting the anchor plate to have a stepped shape, rigidity abrupt changes can be reduced, further reducing stress concentration. Attached Figure Description

[0022] The above and / or other objects and advantages of this utility model will become more apparent from the following description of embodiments in conjunction with the accompanying drawings, wherein: Figure 1 A partial sectional view of the connection between the anchoring device and the concrete structure according to an embodiment of the present invention is shown. Figure 2 It shows Figure 1 Enlarged view of part A; Figure 3 A schematic diagram of the cross-sectional structure of the anchor plate according to the present invention is shown.

[0023] Tag name: 10-Concrete structure, 110-Boss, 110a-Anchor bolt hole, 20-Anchor bolt, 201-First anchor bolt, 202-Second anchor bolt, 20a-Anchoring section, 21-Anchor rod, 22-Anchor plate, 221-Anchor plate body, 222-First flange, 223-Second flange, 224-Reinforcing rib, 225-Receiving groove, 23-First nut, 24-Second nut, 25-First washer, 26-Second washer, 27-Helical reinforcement, 30-Steel tower section, 40-Sleeve. Detailed Implementation

[0024] Exemplary embodiments of the present invention will now be described more fully with reference to the accompanying drawings. However, it should not be construed that the embodiments of the present invention are limited to those described herein. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0025] The tower of a wind turbine is a key load-bearing structure supporting the nacelle and rotor, responsible for safely and reliably transferring top loads (including gravity, wind load, bending moment, and torque) to the tower foundation. Typically, the tower structure is a variable-diameter conical cylinder, assembled from multiple tower sections. This conical design not only conforms to structural mechanics principles, effectively reducing wind resistance, but also optimizes material usage while ensuring top stiffness, achieving a balance between economy and safety.

[0026] Furthermore, with the increasing size of wind turbine generators, the tower height has been continuously increasing, and the structural form has evolved from a single steel tower to a situation where steel towers and hybrid towers coexist.

[0027] Steel towers are a widely used type of tower, typically constructed by assembling multiple steel tower sections. Each section is formed by rolling and welding steel plates. The tower wall thickness gradually increases from the top to the bottom to match the tower's stress characteristics (e.g., the greatest bending moment at the bottom). The bottom of the tower is connected to the tower foundation (i.e., the concrete foundation) via flanges.

[0028] Hybrid tower structures typically refer to a combination of a lower reinforced concrete structure (hereinafter referred to as "concrete tower section") and an upper steel tower section. The concrete tower section is constructed on-site through formwork erection, rebar tying, and concrete pouring, exhibiting excellent compressive strength, fatigue resistance, and damping properties, making it particularly suitable for ultra-high towers (e.g., over 140 meters). The steel tower section, on the other hand, retains the advantages of factory production, easy quality control, and convenient installation.

[0029] Furthermore, hybrid tower structures may include a transition section between the concrete tower section and the steel tower section to ensure smooth and reliable load transfer between the upper steel tower section and the lower concrete tower section. Typically, the transition section is a steel section, usually a short, thick steel cylinder or frustum with a wall thickness greater than that of the upper steel tower section. This structure ensures high bending stiffness, effectively converting the bending moment of the upper steel tower section into internal tensile and compressive stresses without significant deformation, thus enabling smooth and reliable load transfer between the upper steel tower section and the lower concrete tower section.

[0030] To connect the steel transition section to the concrete tower section, the upper part of the concrete tower section connected to the steel transition section can be constructed to have a higher strength than the lower concrete tower section. To achieve this, the upper part of the concrete tower section can be made of concrete with higher strength and a denser steel reinforcement configuration than the lower concrete tower section.

[0031] However, hybrid towers are not limited to the above forms. Hybrid towers may also exclude the steel transition section, with the steel tower section directly connected to the concrete tower section. In this case, the use of steel for the transition section can be omitted, and the installation process can be simplified.

[0032] In all the tower structures described above, anchor bolts are typically required for rigid connections between different sections. For example, in a tower structure consisting only of a steel tower, foundation anchor bolts can be used to connect the lowest end of the steel tower to the concrete foundation; in a hybrid tower structure, segmental anchor bolts can be used to connect adjacent concrete tower sections, and transition anchor bolts can be used to connect concrete tower sections with transition sections or with steel tower sections.

[0033] Whether it's a foundation anchor, a segmented anchor, or a transition anchor, all anchorages achieve their purpose by having the anchor plate at the lower anchorage section of the anchor contact the concrete structure to secure the superstructure. This transfers localized concentrated loads to fix the positions of adjacent structures. However, this action of the anchor also leads to significant stress concentration at the point where the anchor plate contacts the concrete, making it prone to fatigue cracks.

[0034] Therefore, this utility model provides an anchoring device that can effectively solve the stress concentration problem, and a tower structure including the anchoring device. The tower structure according to this utility model is described in detail below with reference to the accompanying drawings.

[0035] Figure 1 A partial sectional view of the connection between the anchoring device and the tower structure according to an embodiment of the present invention is shown. Figure 2 It shows Figure 1 The enlarged view of part A shows a cross-sectional view of the anchoring end of an anchor bolt in the anchoring device.

[0036] like Figure 1 As shown, the tower structure includes a concrete structure 10 and an anchoring device, which includes a plurality of anchor bolts 20, each anchor bolt 20 having an axial first end (e.g., Figure 1 An anchoring section 20a is provided at the lower end of the anchor bolt 20 shown. According to an embodiment of the present invention, the anchoring sections 20a of a plurality of anchor bolts are provided in the concrete structure 10, and the anchoring sections 20a of at least two anchor bolts 20 are staggered from each other in the radial and / or height directions of the concrete structure 10.

[0037] Typically, multiple anchor bolts in an anchoring device are arranged circumferentially along the concrete structure, and because their lengths are roughly the same, the elevations of the anchoring sections are approximately at the same height. In this case, the distance between the anchor plates on the anchoring sections is small, resulting in significant local stress concentration that cannot be diffused. According to the present invention, at least two anchor bolts in a plurality of anchor bolts have their anchoring sections staggered in the radial and / or vertical directions. This increases the distance between the anchoring sections (i.e., the anchor plates on the anchoring sections) of at least two adjacent anchor bolts compared to an arrangement of anchor bolts that are uniformly arranged circumferentially and at the same height. This allows the stress acting between the anchoring section and the concrete structure to be dispersed to a larger area within the concrete structure, thereby effectively diffusing stress within the concrete structure.

[0038] Furthermore, as mentioned above, anchor bolts can be used for the connection between steel tower sections and tower foundations (concrete structures), for the connection between steel tower sections and concrete tower sections in hybrid tower structures, for the connection between steel transition sections and concrete tower sections, and for the connection between multiple concrete tower sections. The anchoring device according to this utility model can be used for the connection of at least one of the above-mentioned adjacent structures. The following description takes the use of the anchoring device for the connection between steel tower sections and concrete tower sections in a hybrid tower structure as an example.

[0039] It should be noted that the phrase "multiple anchor bolts arranged circumferentially along the concrete structure" described above refers to the cross-sectional shape of the tower in a plane. Typically, the tower is circular in plan, and the corresponding tower foundation is also generally circular. "Multiple anchor bolts arranged circumferentially along the concrete structure" means that the anchor bolts are arranged at predetermined intervals along the circumference of the tower or the tower foundation. However, the cross-sectional shape of the tower is not limited to this. For example, it may be a rectangle with rounded corners, and the corresponding tower foundation may have a similar shape. In this case, "multiple anchor bolts arranged circumferentially along the concrete structure" means that the anchor bolts are arranged at predetermined intervals along the circumference of the tower in a rectangular shape with rounded corners. That is, "circumferential" refers to an arrangement with a shape approximately the same as the cross-sectional shape of the tower, and is not limited to a circle. Furthermore, the following description uses a circular cross-section of the tower as an example, but those skilled in the art should understand that the anchoring device according to this invention can also be applied to towers with other cross-sectional shapes.

[0040] According to a preferred embodiment of the present invention, the plurality of anchor bolts 20 may include a plurality of first anchor bolts 201 and a plurality of second anchor bolts 202 whose anchoring sections 20a are staggered in the height direction, and the first anchor bolts 201 and the second anchor bolts 202 may be arranged alternately along the circumference of the concrete structure 10. Figure 1 As shown, the anchoring sections of multiple first anchor bolts 201 can be arranged at a first height of the concrete structure 10, and the anchoring sections of multiple second anchor bolts 202 can be arranged at a second height of the concrete structure 10, with the first height being above the second height.

[0041] However, the present invention is not limited thereto. For example, the plurality of anchor bolts 20 may also include a plurality of third anchor bolts (not shown) whose anchoring sections are staggered from those of the plurality of first anchor bolts 201 and the plurality of second anchor bolts 202. The first anchor bolts 201, second anchor bolts 202 and third anchor bolts may be arranged alternately along the circumference of the concrete structure 10. Alternatively, the first anchor bolts 201, second anchor bolts 202 and third anchor bolts may be arranged at intervals in other order, as long as the anchoring sections of adjacent anchor bolts are staggered in the height direction. In addition, the plurality of anchor bolts may also include one or more other anchor bolts whose anchoring sections are at other heights. In this case, the anchoring sections of two adjacent anchor bolts are also staggered in the height direction.

[0042] According to another preferred embodiment of the present invention, the plurality of anchor bolts 20 may include a plurality of first anchor bolts and a plurality of second anchor bolts arranged staggered in the radial direction of the concrete structure 10, and the plurality of first anchor bolts and the plurality of second anchor bolts are arranged alternately in the circumferential direction of the concrete structure 10. For example, the plurality of first anchor bolts may be arranged on a first virtual circumference of the concrete structure 10, and the plurality of second anchor bolts may be arranged on a second virtual circumference of the concrete structure 10, so that the distance between two adjacent first anchor bolts on the first virtual circumference, two adjacent second anchor bolts on the second virtual circumference, or adjacent first anchor bolts and second anchor bolts in the entire circumferential direction is greater than the distance between adjacent anchor bolts when these anchor bolts are arranged on the same circumference, thereby effectively dissipating the stress concentration problem in the concrete structure 10.

[0043] According to an embodiment of the present invention, in order to achieve the anchoring effect, the first end of the anchor bolt 20 with the anchoring section 20a can be pre-embedded in the concrete structure 10, while the axial second end of the anchor bolt 20 can be connected to the steel structure above (e.g., steel tower section 30).

[0044] In this paper, since the flanges of the steel structure located above the concrete structure 10 are roughly at the same elevation, that is, the second axial ends of the anchor bolts 20 are roughly at the same elevation, the staggered anchoring sections of the anchor bolts described in this paper in the height direction also mean that the overall lengths of the anchor bolts are different. That is, the different lengths of adjacent anchor bolts described below also mean that the anchoring sections of their first axial ends are staggered in the height direction.

[0045] However, this utility model is not limited thereto. Figure 1 The diagram shows an example of a concrete structure 10 being the uppermost of a plurality of concrete tower sections, the inner wall of which may be provided with a radially inwardly projecting boss 110, in which, for example, the end of the anchoring section 20a of at least a portion of the plurality of anchor bolts 20 may be exposed on the lower surface of the boss 110.

[0046] Specifically, multiple anchor bolts 20 may be disposed in the area of ​​the boss 110, and the end of the anchoring segment 20a of the longest of the multiple anchor bolts 20 may be exposed on the lower surface of the boss 110, while the anchoring segments 20a of the other anchor bolts 20 may be embedded in the concrete structure. According to another embodiment, the ends of the anchoring segments 20a of all the multiple anchor bolts 20 may be exposed on the lower surface of the boss 110. In this case, the lower surface of the boss 110 may be formed to include multiple steps formed in the circumferential direction, and the ends of the anchoring segments of adjacent anchor bolts may be exposed on the adjacent surfaces of the steps, thereby being staggered in the height direction, which can also disperse the concentrated stress of the anchor bolts.

[0047] In addition, adjacent anchor bolts 20 provided in the area of ​​the boss 110 can also be staggered in the radial direction. In this case, the lower surface of the boss 110 is preferably an inclined surface, and when the upper surface of the boss 110 is flat, the thickness of the boss becomes thinner as the boss 110 approaches the axis of the tower structure. Therefore, the ends of the anchoring sections of the multiple anchor bolts provided near the inner surface of the boss 110 can be exposed on the lower surface of the boss 110, while the ends of the anchoring sections of the remaining anchor bolts away from the inner surface of the boss 110 can be embedded in the concrete structure of the boss 110 portion.

[0048] However, this invention is not limited to this. The boss 110 may also include a first lower surface and a second lower surface formed sequentially along the radial direction of the concrete structure 10, with a step formed between the first lower surface and the second lower surface, and the thickness from the first lower surface to the upper surface of the boss 110 being less than the thickness from the second lower surface to the upper surface of the boss 110. In this case, the lower ends of the anchoring sections of a portion of the radially staggered anchor bolts may be exposed on the first lower surface of the boss 110, while the lower ends of the anchoring sections of the remaining anchor bolts are embedded in the concrete structure of the boss 110 and may be located above the second lower surface. Furthermore, the lower ends of the anchoring sections of a portion of the radially staggered anchor bolts may be exposed on the first lower surface of the boss 110, while the lower ends of the anchoring sections of the remaining anchor bolts may be exposed on the second lower surface of the boss 110, such that the multiple anchor bolts are staggered both in the height direction and in the radial direction.

[0049] Although the above only describes the case where multiple anchor bolts are staggered in the height direction and in the radial direction when the boss 110 includes a first lower surface and a second lower surface, these two arrangements can also be combined with each other when embedded in a concrete structure, and repeated descriptions are omitted here.

[0050] Figure 2 It shows Figure 1 The enlarged view shows a schematic diagram of the cross-sectional structure of the anchorage section of the anchor bolt. Figure 3A schematic diagram of the cross-sectional structure of the anchor plate according to the present invention is shown. The following is in conjunction with... Figure 2 and Figure 3 The specific structure of the anchoring section of the anchor bolt according to this utility model is described.

[0051] like Figure 2 As shown, anchor bolt holes 110a can be formed in the concrete structure 10, and a sleeve 40 can be provided on the inner wall of the anchor bolt hole 110a, so that only the anchoring section 20a of the anchor bolt 20 is exposed to the outside of the sleeve 40 and directly contacts the concrete structure 10, thereby providing the anchoring force to connect the upper steel structure to the concrete structure 10 by means of the contact stress between the anchoring section 20a and the concrete structure 10.

[0052] According to embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the anchor bolt may include an anchor rod 21 and an anchoring assembly. The anchoring assembly is connected to the first end of the anchor rod 21 to form an anchoring section 20a. That is, the part exposed to the outside of the sleeve 40 and in contact with the concrete structure 10 as described above is the anchoring section 20a of the anchor bolt 20, and the anchoring section 20a may have a predetermined length L in the axial direction of the anchor bolt 20.

[0053] Furthermore, the anchoring assembly according to this utility model may include an anchor plate 22, a first nut 23, and a second nut 24, which are sequentially sleeved on the first end of the anchor rod 21. The anchor plate 22 may be cylindrical, and the first nut 23 and the second nut 24 may be threaded to the anchor rod 21 at both ends of the anchor plate 22, thereby fixing the anchor plate 22 at a specific position on the anchor rod 21.

[0054] like Figure 3 As shown, the anchor plate 22 may include a cylindrical anchor plate body 221 and a first flange 222 and a second flange 223 formed at both ends of the anchor plate body 221 and extending outward along the radial direction of the anchor plate body 221. The first nut 23 and the second nut 24 abut against the first flange 222 and the second flange 223, respectively.

[0055] In existing technologies, anchor plates are typically flat. When anchor bolts are connected, the anchor plate is subjected to the tension and / or shear force of the anchor bolts, and the force is concentrated at the contact point between the nut and the anchor plate. However, flat anchor plates lack transition structures, and the plate material around the contact point cannot evenly distribute the load, resulting in stress concentration in a small area. At the same time, the stiffness of the plate changes abruptly outside the contact point, without a gradual force transmission path, further aggravating local stress. Furthermore, the contact surface between the plate and the concrete structure is also compressed at the stress concentration point, preventing stress from diffusing to a larger area, ultimately leading to a significant increase in stress concentration.

[0056] According to an embodiment of the present invention, the anchor plate 22 is configured to have a predetermined length in the axial direction and includes a first flange 222 and a second flange 223 located at both ends of the cylindrical anchor plate body 221, thereby increasing the contact area with the concrete structure 10, providing a multi-directional transmission path for the force transmitted by the anchor bolt, and dispersing the local compressive stress to more surfaces that are in contact with the anchor plate 22, thereby reducing the degree of stress concentration.

[0057] Furthermore, the diameter of the first flange 222 located at the lower axial end of the anchor plate body 221 can be larger than the diameter of the second flange 223 located at its upper axial end. Since the anchor plate 22 is subjected to anchor bolt tension and / or shear force, the force is concentrated at the contact point between the anchor bolt and the anchor plate, i.e., on the first flange 222. In this case, the force acting on the first flange 222 can be transferred to the second flange 223 in a stepped manner, thereby reducing abrupt changes in rigidity and further reducing stress concentration.

[0058] However, the shape of the first flange 222 and the second flange 223 is not limited to a circle. For example, the first flange 222 and the second flange 223 can also have other shapes such as square. When they have a square shape, the side length of the first flange 222 can be greater than the side length of the second flange 223. This utility model is not limited to this.

[0059] According to an embodiment of the present invention, the anchor plate 22 may further include a plurality of reinforcing ribs 224 connecting the anchor plate body 221 and the first flange 222. Each reinforcing rib 224 may have a triangular plate shape in which its cross-sectional area gradually decreases from the first flange 222 toward the second flange 223, thereby increasing the structural strength of the anchor plate 22 itself and making the stress transition smoother, reducing stress superposition. However, the shape of the reinforcing rib 224 is not limited to this; the reinforcing rib 224 may also have a trapezoidal plate shape in which its cross-sectional area gradually decreases from the first flange 222 toward the second flange 223. According to a preferred embodiment of the present invention, each anchor plate 22 may be provided with four reinforcing ribs, and they are arranged at uniform intervals along the circumference of the anchor plate body 221. However, the present invention is not limited to this, and the number of reinforcing ribs may be adjusted according to actual needs.

[0060] In addition, to reduce friction between the anchor plate 22 and the first nut 23 and the second nut 24, and to prevent wear on the anchor plate 22, the anchoring assembly also includes a first washer 25 disposed between the anchor plate 22 and the first nut 23, and a second washer 26 disposed between the anchor plate 22 and the second nut 24. To accommodate the first washer 25, as shown... Figure 3As shown, the anchor plate 22 may also include a receiving groove 225 disposed on the lower surface of the first flange 222. The shape of the receiving groove may correspond to the shape of the first gasket 25, and the depth of the receiving groove 225 is less than the thickness of the first gasket 25, so as to prevent the first nut 23 from contacting the anchor plate 22.

[0061] According to an embodiment of the present invention, the thickness of the first nut 23 can be greater than the thickness of the second nut 24. This is because the tensile force and / or shear force applied by the anchor bolt 20 acts on the anchor plate 22 through the fastening force between the anchor rod 21 and the first nut 23. Therefore, the connection between the anchor rod 21 and the first nut 23 needs to ensure sufficient connection strength, which requires ensuring sufficient threaded contact area between the two. The second nut 24 is mainly used to ensure that the position of the anchor plate 22 on the anchor rod 21 does not move arbitrarily. Therefore, a thinner nut can be used. However, the present invention is not limited to this. The thickness of the second nut 24 can also be the same as the thickness of the first nut 23.

[0062] Additionally, the anchoring assembly may include a spiral reinforcement 27 disposed around the periphery of the area between the anchoring section 20a and the non-anchoring section of the anchor bolt 20. That is, when viewed along the radial direction of the anchor bolt, a portion of the spiral reinforcement 27 overlaps with the anchor plate 22, and a portion overlaps with the sleeve 40. The spiral reinforcement 27 can be spaced apart from the anchor plate 22 by being tied to reinforcing bars (not shown) in the concrete structure. The spiral reinforcement 27 can restrain the radial deformation of the surrounding concrete when the anchor bolt is under tension, optimize the stress state of the concrete, and inhibit concrete cracking, thereby ensuring the safety and stability of the connection between the anchor bolt 20 and the concrete structure 10.

[0063] As described above, the length of the anchoring section 20a of the anchor bolt 20 in the axial direction is L. In this case, when the anchoring sections 20a of two adjacent anchor bolts 20 are staggered in the height direction of the concrete structure 10, the distance between them can preferably be greater than 50% of the length L of the anchoring section 20a.

[0064] As described above, the diameter of the first flange 222 of the anchor plate 22 is larger than the diameter of the second flange 223. In this case, when the anchoring sections 20a of two adjacent anchor bolts 20 are offset in the radial direction of the concrete structure 10, the distance between them can be greater than the diameter of the first flange 222. However, this is not a limitation. As described above, the first flange 222 and the second flange 223 can also have a square shape. In this case, the distance between the anchoring sections 20a of two adjacent anchor bolts 20 in the radial direction of the concrete structure 10 can be greater than the side length of the first flange 222. However, this invention is not limited to this. For example, when the anchoring sections 20a of two adjacent anchor bolts 20 are offset in the radial direction of the concrete structure 10, the distance between the virtual circumferences where the two adjacent anchor bolts 20 are located (i.e., the difference in the radii of the two virtual circumferences) can also be greater than the maximum diameter or side length of the anchoring section 20a of the anchor bolt 20 in the axial direction of the concrete structure 10 (i.e., the plane direction of the concrete structure 10). Here, "the maximum diameter or side length of the anchoring section 20a of the anchor bolt 20 in the axial direction of the concrete structure 10" refers to the diameter or side length of the first flange 222 in the planar direction. This is because, due to the above-mentioned structural features of the anchoring section 20a, when the anchoring section 20a is viewed in the axial direction, the first flange 222 forms the outermost edge of the anchoring section 20a.

[0065] Furthermore, when the anchoring sections 20a of two adjacent anchor bolts 20 are staggered in both the height direction and the radial direction in the concrete structure 10, the distance of the stagger in the height direction can be greater than 40% of the length L of the anchoring section 20a, and the distance of the stagger in the radial direction can be greater than 80% of the diameter or side length of the first flange 222, or the distance between the virtual circumferences of the two adjacent anchor bolts 20 can be greater than 80% of the maximum diameter or side length of the anchoring section 20a of the anchor bolt 20 in the axial direction of the concrete structure 10.

[0066] Furthermore, the “exposed end of the anchorage section of the anchor bolt” described above refers to at least a portion of the structure of the anchorage section 20a located below the first flange 222 of the anchor plate 22 being exposed, while the anchor plate 22 is entirely located in the concrete structure 10.

[0067] According to another aspect of the present invention, a wind turbine generator set including the above-described tower structure is provided.

[0068] According to embodiments of this utility model, by staggering the anchoring sections of adjacent anchor bolts in the radial and / or vertical directions of the concrete structure, stress in the concrete structure can be effectively diffused.

[0069] According to an embodiment of the present invention, by setting the anchor plate to have a stepped shape, rigidity abrupt changes can be reduced, further reducing stress concentration.

[0070] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0071] The features, structures, or characteristics described in this invention can be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided to give a full understanding of embodiments of this invention. However, those skilled in the art will recognize that the technical solutions of this invention can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this invention.

Claims

1. A tower structure, characterized in that, The tower structure includes a concrete structure (10) and a plurality of anchor bolts (20). An anchoring section (20a) is provided at the first axial end of each anchor bolt (20). The anchoring sections (20a) of the plurality of anchor bolts (20) are provided in the concrete structure (10). The anchoring sections (20a) of at least two anchor bolts (20) are staggered from each other in the radial and / or height directions of the concrete structure (10).

2. The tower structure according to claim 1, characterized in that, The tower structure comprises multiple stacked concrete tower sections, with the concrete structure being the uppermost tower section among the multiple concrete tower sections.

3. The tower structure according to claim 2, characterized in that, The first end of the anchor (20) is embedded in the concrete structure (10).

4. The tower structure according to claim 2, characterized in that, The inner wall of the concrete structure (10) is provided with a boss (110), and the ends of at least a portion of the anchoring sections (20a) of the plurality of anchor bolts (20) are exposed on the lower surface of the boss (110).

5. The tower structure according to claim 1, characterized in that, The tower structure includes a tower body and a tower foundation located below the tower body. The concrete structure is the tower foundation, and the first axial end of the anchor bolt is pre-embedded in the tower foundation.

6. The tower structure according to any one of claims 1 to 5, characterized in that, Multiple anchor bolts (20) are arranged at circumferential intervals along the concrete structure (10), and the anchoring sections (20a) of two adjacent anchor bolts (20) are staggered in the height direction of the concrete structure (10).

7. The tower structure according to claim 6, characterized in that, The plurality of anchor bolts (20) include a plurality of first anchor bolts and a plurality of second anchor bolts, the first anchor bolts and the second anchor bolts being arranged alternately in the circumferential direction of the concrete structure, the anchorage sections of the plurality of first anchor bolts being arranged at a first height of the concrete structure, and the anchorage sections of the plurality of second anchor bolts being arranged at a second height of the concrete structure, the first height being above the second height.

8. The tower structure according to claim 6, characterized in that, The distance between the anchoring segments (20a) of two adjacent anchors (20) in the height direction of the concrete structure (10) is greater than 50% of the length of the anchoring segment (20a).

9. The tower structure according to any one of claims 1 to 5, characterized in that, Multiple anchor bolts (20) are arranged at intervals along the circumference of the concrete structure (10), and the anchoring sections (20a) of two adjacent anchor bolts (20) are set on two virtual circles with different diameters. The difference in the radii of the two virtual circles is greater than the maximum diameter or side length of the anchoring section (20a) in the axial direction of the concrete structure (10).

10. The tower structure according to any one of claims 1-5, characterized in that, The tower structure also includes a steel tower section (30), and the axial second ends of the plurality of anchor bolts are connected to the steel tower section (30).

11. The tower structure according to any one of claims 1-5, characterized in that, The anchor bolt includes an anchor rod (21) and an anchoring assembly, the anchoring assembly being connected to the first end of the anchor rod (21) to form the anchoring section (20a), and The anchoring assembly includes an anchor plate (22), a first nut (23), and a second nut (24). The first nut (23), the anchor plate (22), and the second nut (24) are sleeved on the first end of the anchor rod (21). The anchor plate (22) is cylindrical. The first nut (23) and the second nut (24) are threaded to the anchor rod (21) at both ends of the anchor plate (22).

12. The tower structure according to claim 11, characterized in that, The anchor plate (22) includes a cylindrical anchor plate body (221) and a first flange (222) and a second flange (223) formed at both ends of the anchor plate body (221) and extending outward along the radial direction of the anchor plate body (221). The first nut (23) and the second nut (24) abut against the first flange (222) and the second flange (223) respectively.

13. A wind turbine generator set, characterized in that, The wind turbine generator set includes the tower structure as described in any one of claims 1-12.

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