Tower foundations and wind turbine towers

Abstract

This invention provides a tower foundation and a wind turbine tower. The tower foundation includes a precast cylindrical body and a post-cast base slab. The precast cylindrical body is sunk into an excavated pit and connected to the tower section of the wind turbine to support the tower section. The post-cast base slab is poured on the bottom of the precast cylindrical body to close the bottom opening of the precast cylindrical body. The tower foundation and wind turbine tower provided by this invention can balance the overturning moment of the wind turbine tower section by utilizing the lateral pressure applied laterally to the precast cylindrical body by the pit. Simultaneously, the tower foundation and wind turbine tower provided by this invention eliminate the need for foundation piles and significantly reduce the area of ​​the base slab, thereby simplifying the construction process of the tower foundation, shortening the construction period, reducing construction costs, and improving quality stability.

Description

Technical Field

[0001] This utility model relates to the field of wind power, specifically to a tower foundation and a wind turbine tower. Background Technology

[0002] The tower foundation is the load-bearing structure of a wind turbine. It is installed at the bottom of the wind turbine and fixed to the ground to ensure the safe and stable operation of the wind turbine. In related technologies, the tower foundation includes a base slab, a foundation body, and dozens of foundation piles. The base slab has a large area to provide a large load-bearing area. The dozens of foundation piles are distributed below the base slab and buried in the soil within the coverage area of ​​the base slab. The foundation body is set on the base slab, and the tower of the wind turbine is connected to the top of the foundation body.

[0003] In related technologies, due to the need for a large base slab and a large number of foundation piles, and in order to facilitate the connection between the base slab and dozens of foundation piles, it is usually necessary to first test piles and drive piles to bury dozens of foundation piles in the soil, and then pour the base slab on dozens of foundation piles. However, the test piles, the large number of foundation piles, and the large base slab pouring all require a lot of manpower and time, and the quality is difficult to guarantee. As a result, the construction process of the tower foundation is complicated, the construction period is long, the construction cost is high, and the quality stability is poor. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, this utility model proposes a tower foundation and a wind turbine tower using the tower foundation.

[0006] The tower foundation provided by this utility model includes: The precast cylinder is used to sink into the excavated pit and connect with the tower of the wind turbine to support the tower. The post-cast base plate is poured at the bottom of the precast cylinder to close the bottom opening of the precast cylinder.

[0007] The tower foundation provided by this utility model allows for the excavation of a pit using the caisson method during construction. The precast cylinder is then sunk into the excavated pit, allowing it to sink underground. A post-cast base slab is then poured on-site within the internal space of the precast cylinder to seal the bottom opening. This fixes the tower foundation within the excavated pit. Furthermore, the lateral pressure applied laterally to the precast cylinder by the pit balances the overturning moment of the wind turbine tower. This design eliminates the need for foundation piles and significantly reduces the area of ​​the base slab, thereby simplifying the construction process, shortening the construction period, reducing construction costs, and improving quality stability.

[0008] Optionally, the precast cylinder is provided with a connecting boss, which protrudes from the inner circumferential surface of the precast cylinder toward the inner space of the precast cylinder, and the connecting boss is used to connect with the tower and support the tower.

[0009] Optionally, the connecting boss is provided with a plurality of connecting channels, and the plurality of connecting channels are spaced apart in the circumferential direction of the precast cylinder; The connecting channel penetrates the connecting boss in the axial direction of the precast cylinder, or the connecting channel extends in the axial direction of the precast cylinder and the bottom of the connecting channel is closed. The connecting channel is used for the anchorage to be inserted and anchored to connect the precast cylinder and the tower.

[0010] Optionally, the precast cylinder includes multiple cylinder segments, which are annular in shape, and the multiple cylinder segments are connected sequentially along the axial direction of the precast cylinder.

[0011] Optionally, two adjacent cylindrical segments are connected by a plurality of connectors, which are spaced apart in the circumferential direction of the cylindrical segments.

[0012] Optionally, the tower foundation further includes a first connector, one of two adjacent cylindrical sections is provided with a connecting hole, and the other is provided with a through hole and a groove. The connecting hole and the through hole are correspondingly connected in the axial direction of the cylindrical section. The groove is provided on the side wall of the cylindrical section and communicates with the through hole. The first connector can pass through the through hole and connect with the connecting hole, and can abut against the end face of the through hole located on the groove wall. Alternatively, the tower foundation may further include a second connector and a third connector. One of two adjacent cylindrical sections is provided with a connecting hole, and the other is provided with a through hole and a groove. The connecting hole and the through hole are axially connected to each other in the cylindrical section. The groove is provided on the side wall of the cylindrical section and communicates with the through hole. The second connector is connected to the connecting hole and can extend through the through hole into the groove. The third connector can be connected to the part of the second connector that extends into the groove and can abut against the end face of the through hole located on the groove wall. Alternatively, the tower foundation may further include a fourth connector and a fifth connector. Each of two adjacent cylindrical sections is provided with a through hole and a groove. The two through holes of two adjacent cylindrical sections are correspondingly connected in the axial direction of the cylindrical section. The groove is provided on the side wall of the cylindrical section and is connected to the through hole of the cylindrical section. The fourth connector passes through the two correspondingly connected through holes and abuts against the end face of one of the two through holes located in the groove wall of the correspondingly connected groove. The fifth connector can be connected to the part of the fourth connector that extends into the correspondingly connected groove through the other of the two through holes and can abut against the end face of the other through hole located in the groove wall of the correspondingly connected groove.

[0013] Optionally, the cylindrical segment includes multiple cylindrical plates, which are sequentially connected in the circumferential direction of the cylindrical segment.

[0014] Optionally, the top cylindrical segment among the plurality of cylindrical segments is provided with a connecting boss, the connecting boss protruding towards the inner space of the cylindrical segment relative to the inner circumferential surface of the cylindrical segment, the connecting boss being used to connect with and support the tower cylinder, and / or, the bottom opening of the bottom cylindrical segment among the plurality of cylindrical segments is cast with the post-cast base plate.

[0015] Optionally, the interior space of the precast cylinder is hollowed out or filled with soil, and the filled soil is located on the post-cast base plate.

[0016] The wind turbine tower provided by this utility model includes: The tower cylinder and the tower foundation provided by this utility model, wherein the tower cylinder is disposed on the tower foundation.

[0017] The wind turbine tower provided by this utility model, with the help of the tower foundation provided by this utility model, can not only have high structural stability, but also simplify the construction process, shorten the construction period, reduce the construction cost and improve the quality stability on the basis of high structural stability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the tower foundation in use according to an embodiment of this utility model; Figure 2 This is a schematic diagram of the first connection structure between two adjacent cylindrical sections in the tower foundation according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the second connection structure between two adjacent cylindrical sections in the tower foundation according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the third connection structure between two adjacent cylindrical sections in the tower foundation of this utility model embodiment.

[0019] Figure label: 1. Precast cylinder; 11. Connecting boss; 12. Connecting channel; 13. Cylinder segment; 14. First connector; 15. Connecting hole; 16. Through hole; 17. Groove; 18. Second connector; 19. Third connector; 110. Fourth connector; 120. Fifth connector; 2. Post-cast base plate; 3. Tower cylinder; 4. Anchorage. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] The following is for reference. Figures 1-4 This invention describes a tower foundation and a wind turbine tower according to embodiments of the present invention.

[0022] like Figures 1-4 As shown, the tower foundation of this utility model embodiment includes a precast cylinder 1 and a post-cast base slab 2.

[0023] The precast cylinder 1 is used to sink into the excavated pit and connect with the tower cylinder 3 of the wind turbine tower to support the tower cylinder 3. The post-cast bottom plate 2 is poured on the bottom of the precast cylinder 1 to seal the bottom opening of the precast cylinder 1.

[0024] In practical applications, the precast cylinder 1 can be a vertically arranged cylindrical shape, with its top end used to connect to the tower 3. The precast cylinder 1 can be prefabricated in a prefabrication site such as a production workshop or manufacturing plant, and then transported to the construction site of the wind turbine tower. The post-cast base slab 2 can be cast on-site at the construction site of the wind turbine tower, at the bottom of the precast cylinder 1, to seal the bottom opening of the precast cylinder 1. Both the precast cylinder 1 and the post-cast base slab 2 can be made of concrete.

[0025] The tower foundation provided in this embodiment of the present invention can be constructed by excavating a pit using the caisson method and sinking the precast cylinder 1 into the excavated pit, so that the precast cylinder 1 sinks to the ground. The post-cast bottom slab 2 is then poured on-site in the internal space of the precast cylinder 1 to seal the bottom opening of the precast cylinder 1. This fixes the tower foundation provided by the present invention in the excavated pit. The lateral pressure applied laterally to the precast cylinder 1 by the pit can balance the overturning moment of the tower cylinder 3 of the wind turbine tower. At the same time, the tower foundation provided by this embodiment of the present invention does not require the installation of foundation piles and can significantly reduce the area of ​​the bottom slab, thereby simplifying the construction process of the tower foundation, shortening the construction period, reducing construction costs, and improving quality stability.

[0026] Optionally, the diameter of the post-cast base plate 2 can be less than or equal to the outer diameter of the precast cylinder 1.

[0027] For example, in practical applications, the outer circumferential surface of the precast cylinder 1 can be fitted with the inner circumferential surface of the pit, and the outer circumferential surface of the post-cast base plate 2 can be fitted with the inner circumferential surface of the pit. In this case, the diameter of the post-cast base plate 2 can be equal to the outer diameter of the precast cylinder 1. Alternatively, in practical applications, the outer circumferential surface of the precast cylinder 1 can be fitted with the inner circumferential surface of the pit, and the outer circumferential surface of the post-cast base plate 2 can be fitted with the inner circumferential surface of the precast cylinder 1. In this case, the diameter of the post-cast base plate 2 can be equal to the inner diameter of the precast cylinder 1, that is, the diameter of the post-cast base plate 2 can be smaller than the outer diameter of the precast cylinder 1. Both of these design methods can significantly reduce the area of ​​the base plate.

[0028] like Figure 1 As shown, in one embodiment of this utility model, the precast cylinder 1 may be provided with a connecting boss 11. The connecting boss 11 protrudes from the inner circumferential surface of the precast cylinder 1 toward the inner space of the precast cylinder 1. The connecting boss 11 is used to connect with the tower cylinder 3 and support the tower cylinder 3.

[0029] By designing the connecting boss 11 to protrude into the inner space of the precast cylinder 1 relative to the inner circumference of the precast cylinder 1, it is convenient to connect the precast cylinder 1 and the tower cylinder 3.

[0030] Optionally, the connecting boss 11 can be located on the top of the precast cylinder 1. This design facilitates the connection between the precast cylinder 1 and the tower cylinder 3.

[0031] Optionally, the connecting boss 11 can be annular and circumferential along the prefabricated cylinder 1 (e.g., Figure 1 As shown, the connecting boss 11 extends in the direction surrounding the vertical direction. The connecting boss 11 may also include multiple sub-bosses, which can extend along the circumference of the precast cylinder 1 (e.g., along the vertical direction). Figure 1 The intervals are set in the direction (as shown) around the vertical direction.

[0032] Optionally, a limiting groove can be provided on the top surface of the connecting boss 11, and the bottom of the tower 3 can be embedded in the limiting groove to be limited. Optionally, the limiting groove can be annular and extend along the circumference of the connecting boss 11. The limiting groove can also include multiple sub-grooves, which can extend along the circumference of the connecting boss 11 (e.g., ...). Figure 1 The sub-protrusions are spaced apart in the direction of the vertical direction (as shown), or one or more sub-grooves are provided on each sub-protrusion.

[0033] Optionally, the connecting boss 11 may be located partly above the top surface (i.e., ground) of the pit and partly inside the pit. The portion of the precast cylinder 1 located below the connecting boss 11 may be completely inside the pit. Alternatively, the connecting boss 11 may be completely above the top surface (i.e., ground) of the pit and the portion of the precast cylinder 1 located below the connecting boss 11 may be completely inside the pit.

[0034] By designing the connecting boss 11 so that at least a portion is located above the top surface (i.e., the ground) of the pit, it is convenient to connect the precast cylinder 1 to the tower cylinder 3.

[0035] like Figure 1 As shown, in one embodiment of this utility model, the connecting boss 11 can be provided with multiple connecting channels 12. These multiple connecting channels 12 can be spaced apart in the circumferential direction of the precast cylinder 1, and the connecting channels 12 can be arranged in the axial direction of the precast cylinder 1 (e.g., ...). Figure 1 The connecting boss 11 (shown in the vertical direction) passes through the connecting channel 12 for the anchor 4 to pass through and anchor the precast cylinder 1 and the tower cylinder 3.

[0036] In other words, the connecting channel 12 can pass through the connecting boss 11, and the anchor 4 can pass through the connecting channel 12. The top end of the anchor 4 can be anchored to the tower 3, and the bottom end of the anchor 4 can be anchored to the bottom of the connecting channel 12 through which the anchor 4 passes, thereby anchoring to the connecting boss 11 and then to the precast cylinder 1. In this way, the tower 3 and the precast cylinder 1 are connected through the anchor 4, ensuring the connection stability between the tower 3 and the precast cylinder 1.

[0037] It is understood that the connecting channel 12 is not limited to the through connecting boss 11.

[0038] In another embodiment of the present invention, the connecting boss 11 may be provided with a plurality of connecting channels 12. The plurality of connecting channels 12 may be spaced apart in the circumferential direction of the precast cylinder 1. The connecting channels 12 may extend in the axial direction of the precast cylinder 1, and the bottom of the connecting channels 12 is closed. The connecting channels 12 are used for the anchor 4 connecting the precast cylinder 1 and the tower cylinder 3 to pass through and anchor.

[0039] In other words, the connecting channel 12 can extend downward from the top surface of the connecting boss 11, but does not penetrate the connecting boss 11. The anchor 4 can extend into the connecting channel 12, but does not penetrate the connecting channel 12. The top end of the anchor 4 can be anchored to the tower 3, and the bottom end of the anchor 4 can be anchored to the connecting channel 12 inside the corresponding connecting channel 12, thereby anchoring to the connecting boss 11, and then to the precast cylinder 1. In this way, the tower 3 and the precast cylinder 1 are connected through the anchor 4, ensuring the connection stability between the tower 3 and the precast cylinder 1.

[0040] like Figure 1 As shown, in one embodiment of the present invention, the prefabricated cylinder 1 may include multiple cylinder segments 13, which may be in the shape of an annular cylinder, and the multiple cylinder segments 13 are connected sequentially in the axial direction of the prefabricated cylinder 1.

[0041] Optionally, the cylindrical segment 13 can be a circular annular cylinder in the vertical direction, and multiple cylindrical segments 13 can be connected sequentially in the vertical direction. In practical applications, the cylindrical segments 13 can be prefabricated in prefabrication sites such as production workshops and manufacturing plants, and then transported to the construction site of the wind turbine tower for assembly and connection into a prefabricated cylinder 1, so as to facilitate the production and transportation of the prefabricated cylinder 1. During the process of sinking the precast cylinder 1 into the excavated pit, a pit of a certain depth can be excavated first, and then one or more cylinder segments 13 can be sunk. Then, a pit of a certain depth can be excavated, and one or more cylinder segments 13 can be sunk, until the depth of the excavated pit meets the pre-design, so that the depth of the precast cylinder 1 in the pit meets the pre-design. Alternatively, during the process of sinking the precast cylinder 1 into the excavated pit, the cylinder segments 13 can be placed on the ground first, and then a pit can be excavated corresponding to the cylinder segments 13, so that the cylinder segments 13 placed on the ground gradually sink into the pit as the pit is excavated. In other words, during the process of sinking the precast cylinder 1 into the excavated pit, the pit can be excavated and the cylinder segments 13 can be sunk at the same time. This design can help prevent the excavated pit from collapsing with the help of the cylinder segments 13.

[0042] Optionally, the bottom of the cylindrical section 13 may be provided with a cutting edge to facilitate the sinking of the cylindrical section 13 into the excavated pit.

[0043] Optionally, among the multiple cylindrical sections 13 of the precast cylindrical body 1, only the bottommost cylindrical section 13 may be provided with a cutting edge, while the other cylindrical sections 13 may not be provided with a cutting edge.

[0044] In practical applications, the cylindrical segment 13 with the cutting edge can be placed on the ground first, and a pit can be dug to align with the segment 13 with the cutting edge. After the segment 13 with the cutting edge is sunk into the pit, the remaining cylindrical segments 13 without cutting edges can be placed on top of the segments 13 already sunk into the pit and sunk into the pit as well. During the pouring of the post-cast base slab 2, the material used for pouring the post-cast base slab 2 can be filled at the cutting edge of the bottommost cylindrical segment 13, so that the post-cast base slab 2 is connected to the precast cylinder 1 as a whole, thereby sealing the bottom opening of the precast cylinder 1.

[0045] Optionally, the precast cylinder 1 can be sunk to a depth of 15 to 25 meters in the pit to ensure the stability of the precast cylinder 1.

[0046] Optionally, the precast cylinder 1 can be sunk to a depth of 20 meters into the pit.

[0047] Optionally, the axial dimension of the cylindrical section 13 can range from 3 meters to 5 meters to facilitate production and transportation.

[0048] Optionally, the axial dimension of the cylindrical section 13 can be 4 meters.

[0049] like Figure 1As shown in one embodiment of this utility model, the top cylindrical segment 13 among the plurality of cylindrical segments 13 may be provided with a connecting boss 11. The connecting boss 11 may protrude relative to the inner circumferential surface of the cylindrical segment 13 toward the inner space of the cylindrical segment 13. The connecting boss 11 is used to connect with the tower cylinder 3 and support the tower cylinder 3. This design allows the connecting boss 11 to be located at the top of the prefabricated cylindrical body 1.

[0050] like Figure 1 As shown, in one embodiment of this utility model, the bottom opening of the bottom section 13 among the plurality of cylindrical segments 13 can be cast with a post-cast base plate 2. In other words, the post-cast base plate 2 is cast at the bottom of the bottom cylindrical segment 13 and closes the bottom opening of the bottom cylindrical segment 13. This design allows the post-cast base plate 2 to be cast at the bottom of the precast cylinder 1 to close the bottom opening of the precast cylinder 1.

[0051] like Figure 1 As shown, in one embodiment of this utility model, two adjacent cylindrical segments 13 can be connected by multiple connectors, and the multiple connectors can be spaced apart in the circumferential direction of the cylindrical segments 13.

[0052] By connecting two adjacent cylindrical sections 13 with multiple connectors spaced apart in the circumferential direction, the connection between the two adjacent cylindrical sections 13 can be ensured to be stable.

[0053] like Figure 2 As shown, in one embodiment of the present invention, the tower foundation may further include a first connector 14; in other words, the connector may include a first connector 14.

[0054] One of two adjacent cylindrical sections 13 is provided with a connecting hole 15, and the other is provided with a through hole 16 and a groove 17. Optionally, the upper cylindrical section 13 is provided with a connecting hole 15, and the lower cylindrical section 13 is provided with a through hole 16 and a groove 17. The groove opening of the groove 17 can be located on the inner peripheral wall of the cylindrical section 13. Among all the multiple cylindrical sections 13, the top cylindrical section 13 is provided with a connecting hole 15 at the bottom, the bottom cylindrical section 13 is provided with a through hole 16 and a groove 17 at the top, and the remaining middle cylindrical sections 13 are provided with a connecting hole 15 at the bottom and a through hole 16 and a groove 17 at the top.

[0055] The connecting hole 15 and the through hole 16 are in the axial direction of the cylindrical section 13 (e.g.) Figure 2 The groove 17 is provided on the side wall of the cylindrical section 13 and communicates with the through hole 16. In other words, the through hole 16 passes through the top surface of the cylindrical section 13 and the groove wall of the groove 17.

[0056] The first connector 14 can connect to the through hole 16 and the connecting hole 15, and can abut against the end face of the through hole 16 located on the groove wall of the groove 17. The first connector 14 can be a bolt, and the connecting hole 15 can be a threaded hole. When connecting two adjacent cylindrical sections 13, the first connector 14 can be inserted into the groove 17 from the groove opening and inserted into the through hole 16, and then continue to extend upward and be threadedly connected to the connecting hole 15 until the head of the bolt, which is the first connector 14, abuts against the groove side wall of the groove 17, thereby stably connecting the two adjacent cylindrical sections 13 through the first connector 14.

[0057] Alternatively, the threaded hole 15, which serves as the connection hole, can be formed by a threaded sleeve cast within the cylindrical section 13.

[0058] like Figure 3 As shown, in another embodiment of the present invention, the tower foundation may further include a second connector 18 and a third connector 19. In other words, the connector may include a second connector 18 and a third connector 19.

[0059] One of two adjacent cylindrical sections 13 is provided with a connecting hole 15, and the other is provided with a through hole 16 and a groove 17. Optionally, the upper cylindrical section 13 is provided with a connecting hole 15, and the lower cylindrical section 13 is provided with a through hole 16 and a groove 17. The groove opening of the groove 17 can be located on the inner peripheral wall of the cylindrical section 13. Among all the multiple cylindrical sections 13, the top cylindrical section 13 is provided with a connecting hole 15 at the bottom, the bottom cylindrical section 13 is provided with a through hole 16 and a groove 17 at the top, and the remaining middle cylindrical sections 13 are provided with a connecting hole 15 at the bottom and a through hole 16 and a groove 17 at the top.

[0060] The connecting hole 15 and the through hole 16 are in the axial direction of the cylindrical section 13 (e.g.) Figure 3 The groove 17 is provided on the side wall of the cylindrical section 13 and communicates with the through hole 16. In other words, the through hole 16 passes through the top surface of the cylindrical section 13 and the groove wall of the groove 17.

[0061] The second connector 18 is connected to the connecting hole 15 and can extend through the through hole 16 into the groove 17. The third connector 19 can be connected to the portion of the second connector 18 that extends into the groove 17 and can abut against the end face of the through hole 16 located on the groove wall of the groove 17. The second connector 18 can be a threaded rod, and the third connector 19 can be a nut adapted to the threaded rod. The connecting hole 15 can be a threaded hole. When connecting two adjacent cylindrical sections 13, the threaded rod, which serves as the second connector 18, can be extended from the opening of the groove 17 into the groove 17 and inserted into the through hole 16. Then, it can continue to extend upward and be threadedly connected to the connecting hole 15. The bottom end of the threaded rod, which serves as the second connector 18, remains in the groove 17. The nut, which serves as the third connector 19, is connected to the bottom end of the second connector 18 and abuts against the groove wall of the groove 17. Thus, the two adjacent cylindrical sections 13 are stably connected through the second connector 18 and the third connector 19.

[0062] It should be noted that the nut, which is the third connector 19, can be connected to the bottom end of the threaded rod, which is the second connector 18, within the groove 17. Alternatively, the nut, which is the third connector 19, can be connected to the threaded rod, which is the second connector 18, first. Then, the threaded rod, which is the second connector 18, can be inserted into the through hole 16 and connected to the connecting hole 15. Then, the position of the third connector 19 on the second connector 18 can be adjusted to abut against the groove wall of the groove 17.

[0063] Optionally, the threaded hole 15, which serves as the connection hole, may be formed by a threaded sleeve cast within the cylindrical section 13.

[0064] like Figure 3 As shown, in another embodiment of the present invention, the tower foundation may further include a fourth connector 110 and a fifth connector 120. In other words, the connectors may include a fourth connector 110 and a fifth connector 120.

[0065] Each of two adjacent cylindrical sections 13 is provided with a through hole 16 and a groove 17. Among all the cylindrical sections 13, the top cylindrical section 13 is provided with a through hole 16 and a groove 17 at the bottom, the bottom cylindrical section 13 is provided with a through hole 16 and a groove 17 at the top, and the remaining middle cylindrical sections 13 are provided with a through hole 16 and a groove 17 at both the top and bottom.

[0066] The two through holes 16 of two adjacent cylindrical sections 13 are in the axial direction of the cylindrical section 13 (e.g. Figure 4The groove 17 is disposed on the side wall of the cylindrical section 13 and communicates with the through hole 16 of the cylindrical section 13. In other words, in the through hole 16 and the groove 17 located at the top of the cylindrical section 13, the through hole 16 passes through the top surface of the cylindrical section 13 and the groove wall of the groove 17, and in the through hole 16 and the groove 17 located at the bottom of the cylindrical section 13, the through hole 16 passes through the bottom surface of the cylindrical section 13 and the groove wall of the groove 17.

[0067] The fourth connector 110 passes through the two corresponding through holes 16 and abuts against the end face of one of the two through holes 16 located in the groove wall of the corresponding groove 17. The fifth connector 120 can be connected to the part of the fourth connector 110 that extends into the corresponding groove 17 through the other through hole 16 of the two through holes, and can abut against the end face of the other through hole 16 located in the groove wall of the corresponding groove 17. The fourth connector 110 can be a bolt, and the fifth connector 120 can be a bolt adapter and a nut. When connecting two adjacent cylindrical sections 13, the bolt, which serves as the fourth connector 110, can be inserted into the groove 17 through the slot of the upper groove 17 and into the two through holes 16. The head of the bolt, which serves as the fourth connector 110, abuts against the inner wall of the upper groove 17. The bottom end of the screw, which serves as the fourth connector 110, extends into the lower groove 17. The nut, which serves as the fifth connector 120, extends into the groove 17 through the slot of the lower groove 17 and is connected to the bottom end of the screw, abutting against the groove wall of the lower groove 17. Thus, the two adjacent cylindrical sections 13 are stably connected by the fourth connector 110 and the fifth connector 120.

[0068] In one embodiment of the present invention, the cylindrical segment 13 may include multiple cylindrical pieces, which may be connected sequentially in the circumferential direction of the cylindrical segment 13.

[0069] Optionally, the cylindrical segments can be arc-shaped and can be prefabricated in prefabrication sites such as production workshops or manufacturing plants, and then transported to the construction site of the wind turbine tower. Multiple cylindrical segments are connected in sequence along the vertical direction, or optionally cast and connected on-site at the construction site of the wind turbine tower to form cylindrical segments 13, which further facilitates the production and transportation of the prefabricated cylindrical body 1.

[0070] In one embodiment of this utility model, the internal space of the precast cylinder 1 is hollowed out or filled with soil, and the filled soil is located on the post-cast base plate 2.

[0071] In other words, after the precast cylinder 1 is constructed, the internal space of the precast cylinder 1 can be filled with soil or left hollow. Filling with soil can improve the stability of the precast cylinder 1.

[0072] This utility model embodiment also provides a wind turbine tower, including a tower cylinder 3 and a tower foundation as provided in this utility model embodiment. The tower cylinder 3 is disposed on the tower foundation.

[0073] The wind turbine tower provided in this embodiment of the present invention, with the help of the tower foundation provided in this embodiment of the present invention, can not only have high structural stability, but also simplify the construction process, shorten the construction period, reduce the construction cost and improve the quality stability on the basis of high structural stability.

[0074] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0075] Furthermore, the terms "first" and "second" are used only for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0076] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 mechanical connection, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0077] In this utility model, unless otherwise explicitly 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 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 that the first feature is at a lower horizontal level than the second feature.

[0078] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0079] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A tower foundation, characterized in that, It includes a precast cylinder and a post-cast base plate. The precast cylinder is used to sink into the excavated pit and connect to the tower of the wind turbine to support the tower. The post-cast base plate is cast at the bottom of the precast cylinder to close the bottom opening of the precast cylinder.

2. The tower foundation according to claim 1, characterized in that, The precast cylinder is provided with a connecting boss, which protrudes into the inner space of the precast cylinder relative to its inner circumferential surface. The connecting boss is used to connect with the tower and support the tower.

3. The tower foundation according to claim 2, characterized in that, The connecting boss is provided with multiple connecting channels, and the multiple connecting channels are spaced apart in the circumferential direction of the precast cylinder. The connecting channel penetrates the connecting boss in the axial direction of the precast cylinder, or the connecting channel extends in the axial direction of the precast cylinder and the bottom of the connecting channel is closed. The connecting channel is used for the anchorage to be inserted and anchored to connect the precast cylinder and the tower.

4. The tower foundation according to claim 1, characterized in that, The precast cylinder includes multiple cylinder segments, which are annular in shape and are connected sequentially along the axial direction of the precast cylinder.

5. The tower foundation according to claim 4, characterized in that, Two adjacent cylindrical sections are connected by a plurality of connectors, which are spaced apart in the circumferential direction of the cylindrical sections.

6. The tower foundation according to claim 4, characterized in that, The tower foundation also includes a first connector. One of two adjacent cylindrical sections is provided with a connecting hole, and the other is provided with a through hole and a groove. The connecting hole and the through hole are connected in the axial direction of the cylindrical section. The groove is provided on the side wall of the cylindrical section and communicates with the through hole. The first connector can pass through the through hole and connect with the connecting hole, and can abut against the end face of the through hole located on the groove wall. Alternatively, the tower foundation may further include a second connector and a third connector. One of two adjacent cylindrical sections is provided with a connecting hole, and the other is provided with a through hole and a groove. The connecting hole and the through hole are axially connected to each other in the cylindrical section. The groove is provided on the side wall of the cylindrical section and communicates with the through hole. The second connector is connected to the connecting hole and can extend through the through hole into the groove. The third connector can be connected to the part of the second connector that extends into the groove and can abut against the end face of the through hole located on the groove wall. Alternatively, the tower foundation may further include a fourth connector and a fifth connector. Each of two adjacent cylindrical sections is provided with a through hole and a groove. The two through holes of two adjacent cylindrical sections are correspondingly connected in the axial direction of the cylindrical section. The groove is provided on the side wall of the cylindrical section and is connected to the through hole of the cylindrical section. The fourth connector passes through the two correspondingly connected through holes and abuts against the end face of one of the two through holes located in the groove wall of the correspondingly connected groove. The fifth connector can be connected to the part of the fourth connector that extends into the correspondingly connected groove through the other of the two through holes and can abut against the end face of the other through hole located in the groove wall of the correspondingly connected groove.

7. The tower foundation according to claim 4, characterized in that, The cylindrical segment includes multiple cylindrical plates, which are connected sequentially in the circumferential direction of the cylindrical segment.

8. The tower foundation according to claim 4, characterized in that, The top cylindrical segment among the plurality of cylindrical segments is provided with a connecting boss, the connecting boss protruding towards the inner space of the cylindrical segment relative to the inner circumferential surface of the cylindrical segment, the connecting boss being used to connect with and support the tower cylinder, and / or, the bottom opening of the bottom cylindrical segment among the plurality of cylindrical segments is cast with the post-cast base plate.

9. The tower foundation according to claim 1, characterized in that, The precast cylinder has a hollow interior space filled with soil, and the filled soil is located on the post-cast base plate.

10. A wind turbine tower, characterized in that, It includes a tower cylinder and a tower foundation as described in any one of claims 1-9, wherein the tower cylinder is disposed on the tower foundation.

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