Foundation reinforcement system, tower system, wind turbine generator unit, and foundation reinforcement method

Abstract

The application provides a foundation reinforcing system, a tower system, a wind turbine generator and a foundation reinforcing method. The foundation reinforcing system comprises first foundation concrete, a foundation ring, a support collar and a connecting rod. The foundation ring comprises a foundation ring body extending along a vertical direction and a connecting flange arranged at an upper end of the foundation ring body, and a bottom of the foundation ring body is embedded in the first foundation concrete; the support collar comprises a ring wall extending along the vertical direction, an upper flange arranged at an upper end of the ring wall and a lower flange arranged at a lower end of the ring wall, the upper flange and the connecting flange are stacked in a top-to-bottom manner and can be connected by a fastener, and the lower flange abuts against a top of the first foundation concrete; and the connecting rod is embedded in the first foundation concrete, and an upper end of the connecting rod protrudes from the first foundation concrete and is connected with the lower flange. According to the foundation reinforcing system, the cracking of the concrete on both sides of the foundation ring can be effectively reduced, the development of the cracks is eliminated, and the problems of cracks and mud gushing at the connecting position of the foundation ring and the concrete are completely solved.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, specifically to a foundation reinforcement system, a tower system, a wind turbine generator set, and a foundation reinforcement method. Background Technology

[0002] Currently, the foundation types for onshore wind turbines can be broadly categorized into foundation ring type and anchor bolt type. Foundation ring type foundations have a simple structure and are easy to transport and install, so they are widely used in wind turbines below 1.5MW.

[0003] The foundation ring is similar to a section of steel tower, including an upper flange, a ring wall, and a lower flange. The lower flange and most of the ring wall are embedded in the foundation concrete, while the upper flange and part of the ring wall are exposed in the foundation concrete. The foundation ring is connected to the tower through the upper flange and serves as the foundation of the tower.

[0004] However, during wind turbine operation, the following problems were discovered with the foundation ring foundation: Although the foundation ring and the foundation concrete are rigidly connected, under long-term fatigue loads, cracks easily form at the interface between the foundation ring and the foundation concrete. The larger the crack, the more destructive it is to the foundation concrete. Furthermore, as the cracks continue to expand, the waterproof layer at the connection between the foundation ring and the foundation concrete is also damaged. Water then seeps down along the side of the foundation ring, mixing with the internal ground concrete to form grout. In severe cases, this can lead to "backflow and grout leakage," which further accelerates concrete deterioration and ultimately causes foundation failure. Summary of the Invention

[0005] Therefore, the purpose of this application is to provide a foundation reinforcement system, tower system, wind turbine generator set, and foundation reinforcement method. By setting support rings on the inner and / or outer sides of the foundation ring, the connection interface between the foundation ring and the first foundation concrete is avoided from being exposed, and the development of cracks is eliminated. This solves the problems of cracks and grout leakage in concrete columns under fatigue loads, and ensures that the foundation of the wind turbine generator set can operate safely and stably.

[0006] According to a first aspect of this application, a foundation reinforcement system is provided, comprising a first foundation concrete, a foundation ring, a support collar, and a connecting rod. The foundation ring includes a foundation ring body extending vertically and a connecting flange disposed at the upper end of the foundation ring body, the bottom of the foundation ring body being embedded in the first foundation concrete; the support collar includes a ring wall extending vertically, an upper flange disposed at the upper end of the ring wall, and a lower flange disposed at the lower end of the ring wall, the upper flange and the connecting flange being stacked vertically and connected by fasteners, the lower flange abutting against the top of the first foundation concrete; the connecting rod is embedded in the first foundation concrete, the upper end of the connecting rod extending out of the first foundation concrete and connecting to the lower flange.

[0007] According to the foundation reinforcement system of this application, by setting support rings on the inner and / or outer sides of the foundation ring, the interface between the foundation ring and the first foundation concrete is prevented from being exposed, eliminating the development of cracks and completely solving problems such as cracks and grout leakage at the connection between the foundation and the concrete. By setting connecting rods as connecting bridges, the connection between the support ring and the first foundation concrete can be realized and strengthened, thereby improving the overall pull-out resistance of the foundation reinforcement system.

[0008] Preferably, in this embodiment, the ring wall is fitted to the base ring. This arrangement ensures that the support ring and the base ring are tightly integrated into a single unit, preventing slippage, loosening, or excessive gaps that could render the support ring ineffective.

[0009] Furthermore, in an embodiment, the foundation reinforcement system further includes a reinforcing support ring disposed on top of the first foundation concrete, and the lower surface of the lower flange abuts against the reinforcing support ring.

[0010] Specifically, the reinforcing support ring is embedded in the top of the first foundation concrete, and the compressive strength of the reinforcing support ring is greater than the compressive strength of the first foundation concrete.

[0011] By embedding a reinforcing support ring on top of the first foundation concrete, and ensuring that the compressive strength of the reinforcing support ring is greater than that of the first foundation concrete, the following advantages are achieved: First, using a reinforcing support ring with higher compressive strength as the mounting base for the support collar ensures that the support surface of the support collar has better compressive strength, preventing damage to the support surface and thus ensuring the reinforcement effect of the support collar is not lost. Second, the reinforcing support ring is embedded on top of the first foundation concrete; for example, the reinforcing support ring and the first foundation concrete can be formed as a single unit through casting, thus serving together as the foundation of the entire foundation reinforcement system, thereby ensuring the stability and reliability of the entire foundation reinforcement system installation.

[0012] Furthermore, in an embodiment, the upper end of the connecting rod has an external thread, and the foundation reinforcement system also includes a nut. The upper end of the connecting rod passes through the lower flange and is connected to the nut. There are multiple connecting rods, which are evenly distributed around the support sleeve.

[0013] According to this application, the lower end of the support collar is fixed by a threaded connection, which facilitates installation. Furthermore, in the field of wind power generation, the nut-based fixing method is more resistant to wind loads and more reliable than welding.

[0014] Furthermore, in an embodiment, the support collar is disposed on the outside of the base ring and / or on the inside of the base ring.

[0015] Specifically, the support collar includes a first collar disposed on the outer side of the base ring and a second collar disposed on the inner side of the base ring; the first collar includes a first ring wall, a first upper flange disposed on the upper end of the first ring wall and a first lower flange disposed on the lower end of the first ring wall; the second collar includes a second ring wall, a second upper flange disposed on the upper end of the second ring wall and a second lower flange disposed on the lower end of the second ring wall; the first upper flange and the second upper flange are respectively disposed on both sides of the connecting flange and stacked vertically with the connecting flange, and the first lower flange and the second lower flange both abut against the top of the first foundation concrete.

[0016] Furthermore, the connecting flange extends inward to the inner side of the base ring body, the first ring wall is disposed on the outer side of the base ring body, the first upper flange is in contact with the upper end face of the connecting flange, and the first lower flange extends outward to the outer side of the first ring wall; the second ring wall is disposed on the inner side of the base ring body, the second upper flange is in contact with the lower end face of the connecting flange, and the second lower flange extends inward to the inner side of the first ring wall.

[0017] Furthermore, the first ring wall is fitted to the outer side wall of the base ring body, and the second ring wall is fitted to the inner side wall of the base ring body; the reinforcing support ring includes a first reinforcing support ring disposed on the outer periphery of the base ring body and a second reinforcing support ring disposed on the inner side of the base ring body, the lower surface of the first lower flange abuts against the first reinforcing support ring, and the lower surface of the second lower flange abuts against the second reinforcing support ring; the connecting rod includes a first connecting rod disposed on the outer periphery of the base ring body and a second connecting rod disposed on the inner side of the base ring body, the upper end of the first connecting rod extends out of the first reinforcing support ring and connects to the first lower flange, and the upper end of the second connecting rod extends out of the second reinforcing support ring and connects to the second lower flange.

[0018] Furthermore, in an embodiment, the foundation reinforcement system further includes a second foundation concrete stacked on top of the first foundation concrete, with a portion of the first annular wall, the first lower flange, and the top of the first connecting rod connected to the first lower flange all embedded in the second foundation concrete.

[0019] According to the foundation reinforcement system of this application, by setting a second foundation concrete above the first foundation concrete outside the foundation reinforcement system, the bearing capacity of the surrounding concrete of the overall foundation reinforcement system can be improved, further avoiding problems such as concrete cracking. By locally widening and raising the top of the first foundation concrete and covering a portion of the first ring wall, the first lower flange, and the top of the first connecting rod connected to the first lower flange, the foundation reinforcement system can be protected, preventing the components of the foundation reinforcement system from being exposed to the outside for a long time and causing rust or corrosion, thereby affecting the service life of the entire reinforcement system.

[0020] According to a second aspect of this application, a tower system is provided, the tower system including a tower and any of the aforementioned foundation reinforcement systems, wherein the upper flange and the connecting flange are both connected to the bottom flange of the tower.

[0021] According to a third aspect of this application, a wind turbine generator set is provided, including the tower system described above.

[0022] According to a fourth aspect of this application, a foundation reinforcement method is provided, the foundation reinforcement method comprising the following steps: arranging connecting rods in first foundation concrete on the inner and / or outer periphery of a foundation ring, such that the bottom of the connecting rods is embedded in the first foundation concrete and the upper end of the connecting rods extends out of the first foundation concrete; fitting a support collar on the inner and / or outer periphery of the foundation ring, such that the upper flange of the support collar fits against the connecting flange of the foundation ring, and aligning the mounting holes on the upper flange with the mounting holes on the connecting flange for fastener insertion; fixing the lower flange of the support collar to the top of the first foundation concrete, and connecting the lower flange to the connecting rods.

[0023] According to the foundation reinforcement method of this application, by fitting a support ring on the inner and / or outer side of the foundation ring, the interface between the foundation ring and the first foundation concrete is prevented from being exposed, eliminating the development of cracks and completely solving problems such as cracks and grout leakage at the connection between the foundation and the concrete. By setting a connecting rod as a connecting bridge, the connection between the support ring and the first foundation concrete can be realized and strengthened, thereby improving the overall pull-out resistance of the foundation reinforcement system.

[0024] Furthermore, according to this application, by setting support rings and connecting rods on the inner and / or outer sides of the foundation ring, the bearing capacity of the foundation ring can be shared, thereby achieving the purpose of reinforcing the existing foundation ring foundation. The foundation reinforcement method according to this application not only achieves a foundation with better bearing capacity but also strengthens existing foundation types, reducing the difficulty of modifying existing foundations.

[0025] In an embodiment, the step of arranging connecting rods in the first foundation concrete on the inner and / or outer sides of the base ring includes: drilling holes in the first foundation concrete on the inner and / or outer sides of the base ring to obtain grouting holes; inserting connecting rods into the grouting holes and injecting grout into the grouting holes to fix the connecting rods; the step of fixing the lower flange of the support collar to the top of the first foundation concrete includes: forming a grouting groove on the top of the first foundation concrete on the inner and / or outer sides of the base ring, embedding the reinforcing support ring in the grouting groove, filling the space between the reinforcing support ring and the grouting groove with grout to fix the reinforcing support ring, and making the lower flange of the support collar abut against the top of the reinforcing support ring; the step of connecting the lower flange to the connecting rod includes: passing the top end of the connecting rod through the lower flange and tightening it with a nut at the top end of the connecting rod.

[0026] According to the foundation reinforcement method of this application, a reinforced support ring with higher compressive strength is used as the mounting base of the support collar. This design ensures that the support surface of the support collar has good compressive strength, preventing damage to the support surface and thus ensuring the reinforcement effect of the support collar. Furthermore, the reinforced support ring is embedded in the top of the first foundation concrete; for example, the reinforced support ring and the first foundation concrete can be formed as a single unit through casting, thus serving as the foundation for the entire support collar and ensuring the stability and reliability of the entire support collar installation. High-strength grout is used to fill the space between the reinforced support ring and the grouting groove, ensuring a tight bond between the two and preventing slippage of the reinforced support ring during long-term use, which would lead to the failure of the reinforcement effect. Attached Figure Description

[0027] The above and other objects and features of this application will become clearer from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 A schematic diagram showing the connection between the foundation reinforcement system and the load-bearing mechanism according to the first embodiment of this application is shown;

[0029] Figure 2 It is shown that according to this application Figure 1 A magnified view of a portion of point I in the middle;

[0030] Figure 3 A connection diagram of the foundation reinforcement system and the load-bearing mechanism according to the second embodiment of this application is shown;

[0031] Figure 4 A schematic diagram showing the connection between the foundation reinforcement system and the load-bearing mechanism according to the third embodiment of this application is shown;

[0032] Figure 5A connection diagram of the foundation reinforcement system and the load-bearing mechanism according to the fourth embodiment of this application is shown;

[0033] Figure 6 It is shown that, according to this application, is Figure 5 A magnified view of a portion of point J.

[0034] Figures 1 to 6 Explanation of icon numbers:

[0035] 10. Load-bearing mechanism; 11. Bottom flange;

[0036] 20. First foundation concrete;

[0037] 30. Base ring; 31. Base ring body; 32. Connecting flange; 33. Fixed flange;

[0038] 100. Support collar; 40. First collar; 41. First ring wall; 42. First upper flange; 43. First lower flange; 50. Second collar; 51. Second ring wall; 52. Second upper flange; 53. Second lower flange;

[0039] 200, connecting rod; 60, first connecting rod; 70, second connecting rod;

[0040] 300. Reinforcing support ring; 21. First reinforcing support ring; 22. Second reinforcing support ring;

[0041] 400. Nut; 61. First nut; 71. Second nut;

[0042] 80. Fasteners;

[0043] 90. Second foundation concrete. Detailed Implementation

[0044] It should be noted that the directional terms such as "upper," "lower," "inner," and "outer" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be explained that when referring to a connection between one element and another element, it can be either a direct connection or an indirect connection, unless it is explicitly stated that one element is directly connected to another element.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0046] The specific embodiments of this application have been described in detail. Although some embodiments have been shown and described, those skilled in the art should understand that modifications and improvements can be made to these embodiments without departing from the principles and spirit of this application as defined by the claims and their equivalents.

[0047] Under long-term fatigue loading, the concrete abutments of existing ring-type foundations are prone to cracking and grout leakage, leading to foundation failure or reduced functionality, thus affecting the safety of wind turbine generators. Based on field investigations and research on ring-type foundations, the inventors have proposed a foundation reinforcement system, a tower system incorporating this system, a wind turbine generator unit incorporating the system, and a foundation reinforcement method. The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0048] According to this application, the foundation reinforcement system can serve as the foundation for load-bearing structures such as wind turbine towers, television towers of high-rise buildings, communication towers, and bridge supports. A load-bearing structure refers to a supporting structure used to support heavy objects.

[0049] According to a first aspect of this application, a foundation reinforcement system is provided. The foundation reinforcement system includes a first foundation concrete 20, a foundation ring 30, a support collar 100, and a connecting rod 200. The foundation ring 30 includes a foundation ring body 31 extending vertically and a connecting flange 32 disposed at the upper end of the foundation ring body 31, with the bottom of the foundation ring body 31 embedded in the first foundation concrete 20. The support collar 100 includes a ring wall extending vertically, an upper flange disposed at the upper end of the ring wall, and a lower flange disposed at the lower end of the ring wall. The lower end of the connecting rod 200 is embedded in the first foundation concrete 20, and the lower flange of the support collar 100 abuts against the top of the first foundation concrete 20 and connects to the portion of the upper end of the connecting rod 200 extending out of the first foundation concrete 20. The upper flange of the support collar 100 and the connecting flange 32 of the foundation ring 30 are stacked vertically and can be connected to a load-bearing mechanism 10 by fasteners 80. For example, the support structure 10 can be a tower, with the upper flange of the support collar 100 and the connecting flange 32 of the base ring 30 stacked on top of each other and able to be connected to the bottom flange 11 of the tower by fasteners 80.

[0050] According to the foundation reinforcement system of this application, by setting a support collar 100 on the inner and / or outer side of the foundation ring 30, the connection interface between the foundation ring 30 and the first foundation concrete 20 is avoided from being exposed, effectively reducing cracking of the concrete on the foundation ring 30 side, eliminating crack development, and completely solving problems such as cracks and grout leakage at the connection between the foundation and the concrete. By setting a connecting rod 200 as a connecting bridge, the connection between the support collar 100 and the first foundation concrete 20 is realized, which can enhance the connection between the support collar 100 and the first foundation concrete 20 and improve the overall pull-out resistance of the foundation reinforcement system. In addition, during installation, the lower flange of the support collar 100 abuts against the top of the first foundation concrete 20 and connects to the exposed part of the connecting rod 200 embedded in the first foundation concrete 20. The upper flange of the support collar 100 and the connecting flange 32 of the foundation ring 30 are stacked vertically and can be connected to the bearing mechanism 10 by fasteners 80. In this way, the support collar 100 can share the bearing capacity of the foundation ring 30, thereby improving the bearing capacity of the entire foundation reinforcement system.

[0051] According to this application, the support ring 100 and connecting rod 200 and other structures can be used to modify existing foundation rings to improve the load-bearing capacity of existing foundation rings, thereby reducing the difficulty of modifying old foundations in wind turbines.

[0052] According to this application, the first foundation concrete 20 can be any three-dimensional shape, such as a column. The foundation ring 30 includes a foundation ring body 31 and a connecting flange 32, as well as a fixing flange 33 disposed at the lower end of the foundation ring body 31. The fixing flange 33 can extend inward or outward along the radial direction of the foundation ring 30, so that the foundation ring 30 is securely and reliably fixed in the first foundation concrete 20. The fixing flange 33 can be a columnar structure uniformly arranged in the circumferential direction of the foundation ring body 31, or it can be a circular structure; no specific limitation is made here.

[0053] Based on the above embodiments, a preferred embodiment is also provided. In this embodiment, the ring wall of the support collar 100 is in close contact with the base ring body 31 of the base ring 30, so that the support collar 100 and the base ring 30 can be tightly combined and form a whole, avoiding slippage and loosening between the two, which would cause the reinforcement effect of the support collar 100 to fail.

[0054] In a preferred embodiment, the foundation reinforcement system further includes a reinforcing support ring 300. The reinforcing support ring 300 may be disposed on top of the first foundation concrete 20, with the lower surface of the lower flange of the support collar 100 abutting against the reinforcing support ring 300.

[0055] Specifically, the reinforcing support ring 300 is embedded in the top of the first foundation concrete 20, and the compressive strength of the reinforcing support ring 300 is greater than that of the first foundation concrete 20. This arrangement ensures, on the one hand, that the supporting surface of the support ring 100 has good compressive strength, preventing damage to the supporting surface from causing the reinforcement effect of the support ring 100 to fail. On the other hand, the reinforcing support ring 300 is embedded in the top of the first foundation concrete 20; for example, the reinforcing support ring 300 and the first foundation concrete 20 can be formed as a single unit through casting, thus jointly serving as the foundation of the entire foundation reinforcement system, thereby ensuring the stability and reliability of the entire foundation reinforcement system installation.

[0056] In this embodiment, the connecting rod 200 protrudes from a through hole in the reinforcing support ring 300, and the upper end of the connecting rod 200 has external threads. The foundation reinforcement system also includes a nut 400. The upper end of the connecting rod 200 passes sequentially through the through hole in the reinforcing support ring 300 and the lower flange of the support collar 100 before connecting to the nut 400. According to this application, using a threaded connection to fix the lower end of the support collar 100 facilitates installation. Furthermore, in the field of wind power generation, the method of fixing with the nut 400 is more resistant to wind loads and more reliable than welding.

[0057] According to this application, the connecting rod 200 includes a first connecting rod 60 and a second connecting rod 70. Exemplarily, the connecting rod 200 is an anchor rod, specifically, it can be a strip-shaped structure. The nut 400 includes a first nut 61 and a second nut 71. The lower ends of both the first connecting rod 60 and the second connecting rod 70 are embedded in the first foundation concrete 20. The lower flange of the support collar 100 abuts against the top of the first foundation concrete 20 and is connected to the upper ends of the first connecting rod 60 and the second connecting rod 70 that are exposed in the first foundation concrete 20, respectively.

[0058] In this embodiment, there are multiple connecting rods 200, which are evenly distributed around the support collar 100. This arrangement can further enhance the reliability and stability of the entire reinforcement system.

[0059] According to this application, the support collar 100 can be disposed on the outer side of the base ring 30, or on the inner side of the base ring 30, or the support collar 100 can be disposed on both the inner and outer sides of the base ring 30. The support collar 100 can be an integrally formed structure or a split structure. In the case of an integrally formed structure, it can fit well with the base ring 30, has good stability, and is easy to install.

[0060] Figure 1 and Figure 2 An example is shown where support collars are provided on the inner and outer sides of the base ring 30, respectively. For example... Figure 1 and Figure 2 As shown, the support collar 100 includes a first collar 40, which is disposed on the outer side of the base ring 30. The first collar 40 includes a first ring wall 41 extending vertically, a first upper flange 42 disposed at the upper end of the first ring wall 41, and a first lower flange 43 disposed at the lower end of the first ring wall 41. The support collar 100 also includes a second collar 50, which is disposed on the inner side of the base ring 30. The second collar 50 includes a second ring wall 51 extending vertically, a second upper flange 52 disposed at the upper end of the second ring wall 51, and a second lower flange 53 disposed at the lower end of the second ring wall 51. The first upper flange 42 and the second upper flange 52 are respectively disposed on both sides of the connecting flange 32 and stacked vertically with the connecting flange 32. The first lower flange 43 and the second lower flange 53 both abut against the top of the first foundation concrete 20.

[0061] Specifically, the connecting flange 32 extends inward to the inner side of the base ring 31, the first ring wall 41 is disposed on the outer side of the base ring 31, the first upper flange 42 is fitted with the upper end face of the connecting flange 32, and the first lower flange 43 extends outward to the outer side of the first ring wall 41. The second ring wall 51 is disposed on the inner side of the base ring 31, the second upper flange 52 is fitted with the lower end face of the connecting flange 32, and the second lower flange 53 extends inward to the inner side of the first ring wall 41.

[0062] Further, in a preferred embodiment, the first annular wall 41 is fitted to the outer wall of the base ring 31, and the second annular wall 51 is fitted to the inner wall of the base ring 31. The reinforcing support ring 300 includes a first reinforcing support ring 21 disposed on the outer periphery of the base ring 31 and a second reinforcing support ring 22 disposed on the inner side of the base ring 31. The lower surface of the first lower flange 43 abuts against the first reinforcing support ring 21, and the lower surface of the second lower flange 53 abuts against the second reinforcing support ring 22.

[0063] In an embodiment, the connecting rod 200 includes a first connecting rod 60 disposed on the outer periphery of the base ring 31 and a second connecting rod 70 disposed on the inner side of the base ring 31. The upper end of the first connecting rod 60 extends out of the first reinforcing support ring 21 and connects to the first lower flange 43, and the upper end of the second connecting rod 70 extends out of the second reinforcing support ring 22 and connects to the second lower flange 53.

[0064] Figure 3 An example is shown where a support collar is provided on the outside of the base ring 30. For example... Figure 3As shown, the foundation reinforcement system includes a first foundation concrete 20, a foundation ring 30, a first sleeve ring 40, and a first connecting rod 60. The foundation ring 30 includes a foundation ring body 31 extending vertically and a connecting flange 32 located at the upper end of the foundation ring body 31. The bottom of the foundation ring body 31 is embedded in the first foundation concrete 20. The first sleeve ring 40 is located outside the foundation ring 30 and includes a first ring wall 41 extending vertically, a first upper flange 42 located at the upper end of the first ring wall 41, and a first lower flange 43 located at the lower end of the first ring wall 41. The lower end of the first connecting rod 60 is embedded in the first foundation concrete 20. The first lower flange 43 of the first sleeve ring 40 abuts against the top of the first foundation concrete 20 via a first reinforcing support ring 21 and is connected to the portion of the first connecting rod 60 extending out of the first foundation concrete 20. The first upper flange 42 of the first sleeve ring 40 and the connecting flange 32 of the foundation ring 30 are stacked vertically and can be connected to the bearing mechanism 10 via fasteners 80. For example, the support structure 10 can be a tower, with the first upper flange 42 of the first ring 40 and the connecting flange 32 of the base ring 30 stacked on top of each other and able to be connected to the bottom flange 11 of the tower by fasteners 80.

[0065] Figure 4 An example is shown where a support collar is provided on the inner side of the base ring 30. For example... Figure 4 As shown, according to the third embodiment of this application, the foundation reinforcement system includes a first foundation concrete 20, a foundation ring 30, a second sleeve ring 50, and a second connecting rod 70. The foundation ring 30 includes a foundation ring body 31 extending vertically and a connecting flange 32 disposed at the upper end of the foundation ring body 31, with the bottom of the foundation ring body 31 embedded in the first foundation concrete 20. The second sleeve ring 50 includes a second ring wall 51 extending vertically, a second upper flange 52 disposed at the upper end of the second ring wall 51, and a second lower flange 53 disposed at the lower end of the second ring wall 51. The lower end of the second connecting rod 70 is embedded in the first foundation concrete 20, and the second lower flange 53 of the second sleeve ring 50 abuts against the top of the first foundation concrete 20 via a second reinforcing support ring 22, and is connected to the portion of the upper end of the second connecting rod 70 that protrudes from the first foundation concrete 20. The second upper flange 52 of the second ring 50 and the connecting flange 32 of the base ring 30 are stacked vertically and can be connected to the bearing mechanism 10 by fasteners 80. For example, the bearing mechanism 10 can be a tower. The second upper flange 52 of the second ring 50 and the connecting flange 32 of the base ring 30 are stacked vertically and can be connected to the bottom flange 11 of the tower by fasteners 80.

[0066] Figure 5 and Figure 6 An example of adding a second layer of concrete outside the foundation system is shown. Figure 5 and Figure 6As shown, in addition to the components described in the above embodiments, the foundation reinforcement system also includes a second foundation concrete 90. The second foundation concrete 90 is stacked on top of the first foundation concrete 20, and a portion of the first annular wall 41, the top of the first lower flange 43, and the top of the first connecting rod 60 connected to the first lower flange 43 are all embedded in the second foundation concrete 90.

[0067] According to the foundation reinforcement system of this application, by setting a second foundation concrete 90 above the first foundation concrete 20 outside the foundation reinforcement system, the bearing capacity of the surrounding concrete of the overall foundation reinforcement system can be improved, further avoiding problems such as concrete cracking. By locally widening and raising the top of the first foundation concrete and covering a part of the first ring wall 41, the first lower flange 43, and the top of the first connecting rod 60 connected to the first lower flange 43, the foundation reinforcement system can be protected, preventing the components of the foundation reinforcement system from being exposed to the outside for a long time and causing rust or corrosion, thereby affecting the service life of the entire reinforcement system.

[0068] According to a second aspect of this application, a tower system is provided. The tower system includes a tower and a foundation reinforcement system as provided in the above embodiments. Both the upper flange and the connecting flange 32 are connected to the bottom flange 11 of the tower, thus possessing all the beneficial effects of the above embodiments, which will not be elaborated further here.

[0069] According to a third aspect of this application, a wind turbine generator set is provided, including the tower system as described above.

[0070] The foundation reinforcement method of this application will be described in detail below with reference to embodiments.

[0071] According to a fourth aspect of this application, a foundation reinforcement method is provided, which may include the following steps:

[0072] Step S101: A connecting rod 200 is arranged in the first foundation concrete 20 on the inner and / or outer sides of the foundation ring 30, such that the bottom of the connecting rod 200 is embedded in the first foundation concrete 20, and the upper end of the connecting rod 200 extends out of the first foundation concrete 20.

[0073] In step S102, the support collar 100 is fitted onto the inner and / or outer side of the base ring 30, so that the upper flange of the support collar 100 fits against the connecting flange 32 of the base ring 30, and the mounting holes on the upper flange are aligned with the mounting holes on the connecting flange 32 for the fastener 80 to be inserted. The lower flange of the support collar 100 is fixed to the top of the first foundation concrete 20, and the lower flange is connected to the connecting rod 200.

[0074] According to the foundation reinforcement method of this application, by installing a support collar 100 on the inner and / or outer side of the foundation ring 30, the connection interface between the foundation ring 30 and the first foundation concrete 20 is avoided from being exposed, effectively reducing cracking of the concrete on the foundation ring 30 side, eliminating crack development, and completely solving problems such as cracks and grout leakage at the connection between the foundation and the concrete. By setting a connecting rod 200 as a connecting bridge, the connection between the support collar 100 and the first foundation concrete 20 can be realized, and the connection between the support collar 100 and the first foundation concrete 20 can be strengthened, thereby improving the overall pull-out resistance of the foundation reinforcement system.

[0075] According to this application, structures such as the support collar 100 and connecting rod 200 can be used to modify existing foundation ring-type foundations to improve the load-bearing capacity of the existing foundation ring, thereby reducing the difficulty of modifying old foundations in wind turbines. For example, by setting the support collar 100 and connecting rod 200 on the inner and / or outer side of the foundation ring of an old unit, the support collar 100 can share the load-bearing capacity of the foundation ring 30, thereby achieving the purpose of reinforcing the existing foundation ring-type foundation and reducing the difficulty of modifying old foundations in wind turbines.

[0076] Furthermore, according to this application, the foundation reinforcement method can also achieve a new foundation structure with better load-bearing capacity. In an embodiment, the foundation reinforcement method further includes pre-preparing a corresponding foundation ring 30 according to the tower, embedding the foundation ring 30 into the first foundation concrete 20, and then following the steps mentioned in the foundation reinforcement method to achieve a foundation structure with better load-bearing capacity. The foundation reinforcement method for renovating old foundations will be described in detail below with reference to embodiments. The installation method of the foundation reinforcement system according to this application (i.e., the foundation reinforcement method) can be performed with reference to the above.

[0077] In this embodiment, the step of arranging the connecting rod 200 in the first foundation concrete 20 on the inner and / or outer periphery of the foundation ring 30 includes: drilling holes in the first foundation concrete 20 on the inner and / or outer periphery of the foundation ring 30 to obtain grouting holes, inserting the connecting rod 200 into the grouting holes, and injecting grout into the grouting holes to fix the connecting rod 200. Specifically, the first foundation concrete 20 on the inner and / or outer periphery of the foundation ring 30 is first chiseled away to form a grouting groove, and then drilling continues downwards at the bottom of the grouting groove to obtain grouting holes.

[0078] In an embodiment, the step of fixing the lower flange of the support collar 100 to the top of the first foundation concrete 20 includes: forming a grouting groove on the top of the first foundation concrete 20 on the inner and / or outer side of the periphery of the foundation ring 30; embedding the reinforcing support ring 300 into the grouting groove; filling the space between the reinforcing support ring 300 and the grouting groove with grout to fix the reinforcing support ring 300, so that the lower flange of the support collar 100 abuts against the top of the reinforcing support ring 300.

[0079] In this embodiment, the step of connecting the lower flange to the connecting rod 200 includes: passing the top end of the connecting rod 200 through the lower flange and tightening it with a nut 400. Specifically, the top end of the connecting rod 200 can pass through a through hole in the reinforcing support ring 300 and be exposed before connecting to the lower flange of the support collar 100.

[0080] According to the foundation reinforcement method of this application, a reinforced support ring 300 with high compressive strength is set as the mounting base of the support collar 100. This configuration ensures that the supporting surface of the support collar 100 has good compressive strength, preventing damage to the supporting surface and thus preventing the reinforcement effect of the support collar 100 from failing. Furthermore, the reinforced support ring 300 is embedded in the top of the first foundation concrete 20. For example, the reinforced support ring 300 and the first foundation concrete 20 can be formed as a single unit through casting, thus jointly serving as the foundation of the entire support collar 100, thereby ensuring the stability and reliability of the entire support collar 100 installation. Using high-strength grout to fill the space between the reinforced support ring 300 and the grouting groove ensures a tight bond between the two, preventing slippage of the reinforced support ring 300 during long-term use and thus preventing the reinforcement effect from failing.

[0081] In addition, after the grouting groove is formed, the surface concrete residue needs to be removed first, and the width and depth of the grouting groove should be designed as needed to facilitate the installation of the reinforcing support ring 300.

[0082] According to this application, under long-term loads, the foundation ring type may experience displacement or tilting. Therefore, before reinforcement, it is necessary to determine whether the foundation ring is damaged or tilted. In this embodiment, the foundation reinforcement method also includes determining the levelness of the connecting flange 32 of the foundation ring 30 before installing the support collar 100. If the levelness of the connecting flange 32 is insufficient, a correction operation is performed.

[0083] In one embodiment, the foundation reinforcement method further includes using a rebar scanner to detect the rebar on the inner surface of the first foundation concrete 20 before drilling, so as to avoid the rebar when determining the drilling location, thereby avoiding damage to the rebar and other reinforcement components at the root of the existing foundation ring.

[0084] In this embodiment, the foundation reinforcement method further includes, during the drilling step, setting the depth of the grouting hole to be greater than the length of the connecting rod 200 embedded in the first foundation concrete 20. During installation, the connecting rod 200 is perpendicular to the grouting hole, and then grout is injected into the grouting hole to fix the connecting rod 200. Specifically, the depth of the grouting hole can be set to exceed the fixing flange 33 of the foundation ring 30, while the insertion depth of the connecting rod 200 is higher than the fixing flange 33 of the foundation ring 30.

[0085] In the embodiment, during the drilling step, holes are drilled uniformly in the circumferential direction of the base ring 30 to obtain grouting holes that are uniformly distributed around the circumference of the base ring 30.

[0086] According to the foundation reinforcement method of this application, by setting the depth of the grouting hole to be greater than the length of the part of the connecting rod 200 embedded in the first foundation concrete 20, the verticality of the connecting rod 200 can be easily determined when the connecting rod 200 is inserted and suspended in the grouting hole.

[0087] In this embodiment, the length of the connecting rod 200 extending beyond the first foundation concrete 20 can be designed according to actual needs. After drilling, the grouting hole can be filled with water and repeatedly cleaned, dried, and have residue removed to ensure the quality of the grouting layer. Additionally, the exposed length and verticality of the connecting rod 200 can be designed as needed, and then the connecting rod 200 is inserted into the grouting hole for grouting.

[0088] In this embodiment, during the step of installing the collar 100, the surface of the first foundation concrete 20 can be cleaned to avoid residue interfering with the flatness of the installation surface. Before the step of grouting with high-strength grouting material, the method further includes: cleaning the surface of the first foundation concrete 20 to fully wet the surface and remove any standing water.

[0089] According to the foundation reinforcement method of this application, before using high-strength grout, the surface of the first foundation concrete 20 should be thoroughly cleaned, free of loose gravel, laitance, dust, etc., and the surface of the first foundation concrete 20 should be fully moistened and any standing water removed to ensure the quality of the grout layer. Grouting should be carried out from one side until it overflows from the other side. After grouting, proper curing of the grout layer should be performed.

[0090] In summary, according to this application, the foundation reinforcement system has good load-bearing capacity. By supporting the inner and / or outer side of the foundation ring 30 with the sleeve 100, the connection interface between the foundation ring 30 and the first foundation concrete 20 is prevented from being exposed, eliminating crack development and completely solving problems such as cracks and grout leakage at the connection between the foundation and the concrete. The foundation reinforcement system according to this application can be adapted to more types of load-bearing structures, and the foundation reinforcement method according to this application can not only achieve a foundation with good load-bearing capacity, but also reinforce existing foundation types, reducing the difficulty of modifying existing foundations.

[0091] While embodiments of this application have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. However, it should be understood that, in the view of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of this application as defined in the claims.

Claims

1. A foundation reinforcement system, characterized in that, include: First foundation concrete (20); The base ring (30) includes a base ring body (31) extending in a vertical direction and a connecting flange (32) disposed at the upper end of the base ring body (31), the bottom of the base ring body (31) being embedded in the first foundation concrete (20); The support collar (100) includes a ring wall extending in a vertical direction, an upper flange disposed at the upper end of the ring wall and a lower flange disposed at the lower end of the ring wall, the upper flange and the connecting flange (32) being stacked on top of each other and being connected by fasteners (80), and the lower flange abutting against the top of the first foundation concrete (20). A connecting rod (200) is embedded in the first foundation concrete (20), and the upper end of the connecting rod (200) extends out of the first foundation concrete (20) and is connected to the lower flange. The support collar (100) includes a first collar (40) disposed on the outer side of the base ring (30) and a second collar (50) disposed on the inner side of the base ring (30). The first ring (40) includes a first ring wall (41), a first upper flange (42) disposed at the upper end of the first ring wall (41), and a first lower flange (43) disposed at the lower end of the first ring wall (41). The second ring (50) includes a second ring wall (51), a second upper flange (52) disposed at the upper end of the second ring wall (51), and a second lower flange (53) disposed at the lower end of the second ring wall (51); The first upper flange (42) and the second upper flange (52) are respectively disposed on both sides of the connecting flange (32) and stacked on top of the connecting flange (32). The first lower flange (43) and the second lower flange (53) abut against the top of the first foundation concrete (20).

2. The foundation reinforcement system according to claim 1, characterized in that, The ring wall is attached to the basic ring body (31).

3. The foundation reinforcement system according to claim 1, characterized in that, The foundation reinforcement system also includes: A reinforcing support ring (300) is disposed on top of the first foundation concrete (20), and the lower surface of the lower flange abuts against the reinforcing support ring (300).

4. The foundation reinforcement system according to claim 3, characterized in that, The reinforcing support ring (300) is embedded in the top of the first foundation concrete (20), and the compressive strength of the reinforcing support ring (300) is greater than the compressive strength of the first foundation concrete (20).

5. The foundation reinforcement system according to claim 1, characterized in that, The upper end of the connecting rod (200) has an external thread, and the foundation reinforcement system also includes a nut (400), the upper end of the connecting rod (200) passes through the lower flange and is connected to the nut (400); The number of connecting rods (200) is multiple, and they are evenly distributed around the support collar (100) in the circumference.

6. The foundation reinforcement system according to claim 3, characterized in that, The connecting flange (32) extends to the inside of the base ring (31), the first ring wall (41) is disposed on the outside of the base ring (31), the first upper flange (42) is in contact with the upper end face of the connecting flange (32), and the first lower flange (43) extends to the outside of the first ring wall (41). The second ring wall (51) is disposed on the inner side of the base ring (31), the second upper flange (52) is in contact with the lower end face of the connecting flange (32), and the second lower flange (53) extends to the inner side of the first ring wall (41).

7. The foundation reinforcement system according to claim 6, characterized in that, The first ring wall (41) is attached to the outer side wall of the base ring (31), and the second ring wall (51) is attached to the inner side wall of the base ring (31); The reinforcing support ring (300) includes a first reinforcing support ring (21) disposed on the outer periphery of the base ring body (31) and a second reinforcing support ring (22) disposed on the inner side of the base ring body (31). The lower surface of the first lower flange (43) abuts against the first reinforcing support ring (21), and the lower surface of the second lower flange (53) abuts against the second reinforcing support ring (22). The connecting rod (200) includes a first connecting rod (60) disposed on the outer periphery of the base ring (31) and a second connecting rod (70) disposed on the inner side of the base ring (31). The upper end of the first connecting rod (60) extends out of the first reinforcing support ring (21) and is connected to the first lower flange (43). The upper end of the second connecting rod (70) extends out of the second reinforcing support ring (22) and is connected to the second lower flange (53).

8. The foundation reinforcement system according to claim 7, characterized in that, The foundation reinforcement system also includes: The second foundation concrete (90) is stacked on top of the first foundation concrete (20), and a portion of the first annular wall (41), the top of the first lower flange (43) and the first connecting rod (60) connected to the first lower flange (43) are all embedded in the second foundation concrete (90).

9. A tower system, characterized in that, include: The tower and the foundation reinforcement system as described in any one of claims 1 to 8, wherein the upper flange and the connecting flange (32) are both connected to the bottom flange (11) of the tower.

10. A wind turbine generator set, characterized in that, Including the tower system as described in claim 9.

11. A foundation reinforcement method, characterized in that, The foundation reinforcement method includes the following steps: Connecting rods (200) are arranged in the first foundation concrete (20) on the inner and outer sides of the foundation ring (30), such that the bottom of the connecting rods (200) is embedded in the first foundation concrete (20) and the upper end of the connecting rods (200) extends out of the first foundation concrete (20). A support collar (100) is fitted onto the inner and outer sides of the base ring (30), wherein the support collar (100) includes a first collar (40) disposed on the outer side of the base ring (30) and a second collar (50) disposed on the inner side of the base ring (30); the first collar (40) includes a first ring wall (41), a first upper flange (42) disposed on the upper end of the first ring wall (41) and a first lower flange (43) disposed on the lower end of the first ring wall (41); the second collar (50) includes a second ring wall (51), a second upper flange (52) disposed on the upper end of the second ring wall (51) and a second lower flange (53) disposed on the lower end of the second ring wall (51). The first upper flange (42) and the second upper flange (52) are respectively disposed on both sides of the connecting flange (32) of the base ring (30) and fit against the connecting flange (32). The mounting holes on the first upper flange (42) and the second upper flange (52) are aligned with the mounting holes on the connecting flange (32) for fasteners (80) to be inserted. The first lower flange (43) and the second lower flange (53) are fixed to the top of the first foundation concrete (20) and connected to the connecting rod (200).

12. The foundation reinforcement method according to claim 11, characterized in that, The step of arranging connecting rods (200) in the first foundation concrete (20) on the inner and outer sides of the periphery of the foundation ring (30) includes: drilling holes in the first foundation concrete (20) on the inner and outer sides of the periphery of the foundation ring (30) to obtain grouting holes; inserting connecting rods (200) into the grouting holes and injecting grout into the grouting holes to fix the connecting rods (200). The step of fixing the lower flange of the support collar (100) to the top of the first foundation concrete (20) includes: forming a grouting groove on the top of the first foundation concrete (20) on the inner and outer sides of the periphery of the foundation ring (30); embedding the reinforcing support ring (300) into the grouting groove; filling the space between the reinforcing support ring (300) and the grouting groove with grout to fix the reinforcing support ring (300); and having the lower flange of the support collar (100) abut against the top of the reinforcing support ring (300). The step of connecting the lower flange to the connecting rod (200) includes: passing the top end of the connecting rod (200) through the lower flange and tightening it with a nut (400) at the top end of the connecting rod (200).

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