Fan foundation and fan generator set

Abstract

The utility model relates to the technical field of power generation equipment, in particular to a fan foundation and a fan generator set. The fan foundation comprises a foundation bearing platform and a plurality of micropore cast-in-place piles. A plurality of mounting holes are formed in the bottom of the foundation platform; one end of each micropore cast-in-place pile is inserted into a foundation micropore located below the foundation bearing platform, and the other end of each micropore cast-in-place pile is inserted into a mounting hole of the foundation bearing platform. The micropore cast-in-place pile comprises a plurality of longitudinal bars, at least one spiral stirrup and at least one inner reinforcing ring. The plurality of longitudinal ribs are annularly distributed; the spiral stirrup is wound on the outer side of the longitudinal bar; the inner reinforcing rings are supported on the inner sides of the longitudinal ribs. According to the fan foundation and the fan generator set, the micropore cast-in-place piles are adopted, the single-pile construction time is shortened, the use amount of foundation concrete and reinforcing steel bars is reduced, the rock excavation amount is reduced, and the material cost is reduced; the micropore cast-in-place pile is high in overall strength and can meet the fixing requirements of a small-diameter drill hole and a foundation platform.

Description

Technical Field

[0001] This utility model relates to the field of power generation equipment technology, and in particular to a wind turbine foundation and a wind turbine generator set. Background Technology

[0002] In wind power projects, the stability of the wind turbine foundation directly affects the safe operation and service life of the turbine. Traditional wind turbine foundation types, such as gravity foundations and pile foundations, are widely used in many wind power scenarios, but they exhibit significant limitations under certain special geological conditions. When facing areas with favorable geological conditions, such as moderately weathered or slightly weathered bedrock, despite the superior mechanical properties of the rock itself, the excavation of the foundation pit presents enormous challenges. Traditional gravity foundations, to ensure the stable operation of the wind turbine, must rely on increasing their own volume and weight to resist overturning moments, which significantly increases material costs and the amount of excavation required for the rock foundation. Traditional large-diameter bored pile foundations are extremely difficult to construct in rock foundation conditions, have a long construction period, and incur high drilling costs. Furthermore, in some confined spaces or areas with extremely strict requirements for controlling the impact on the surrounding environment, the construction of bored piles faces numerous difficulties.

[0003] As the single-unit capacity of wind turbine generators moves towards large megawatts, traditional foundation solutions have failed to fully utilize the ultra-high bearing capacity and good integrity of rock foundations under rock geological conditions, resulting in a sharp increase in foundation construction costs and difficulties.

[0004] To address the above issues, there is an urgent need for a new type of micro-drilled cast-in-place pile for wind turbine foundations, in order to reduce the amount of rock excavation and the amount of concrete used in the wind turbine foundations, thereby achieving considerable cost reduction and efficiency improvement. Utility Model Content

[0005] This utility model provides a wind turbine foundation and a wind turbine generator set to solve the defects of existing wind turbine foundations using large-diameter bored piles, which are extremely difficult to construct in rock foundation conditions, have a long construction period, and have high drilling costs.

[0006] This utility model provides a wind turbine foundation, characterized in that it includes:

[0007] The foundation platform has multiple mounting holes at its bottom;

[0008] Multiple micro-hole cast-in-place piles, one end of which is inserted into a micro-hole in the foundation soil below the foundation cap, and the other end of which is inserted into the mounting hole in the foundation cap, the micro-hole cast-in-place piles comprising:

[0009] Multiple longitudinal ribs, wherein the multiple longitudinal ribs are distributed in a ring;

[0010] Spiral stirrups are wrapped around the outside of the longitudinal reinforcement;

[0011] An inner reinforcing ring is provided for support on the inner side of the longitudinal rib.

[0012] According to the wind turbine foundation provided by this utility model, the foundation platform is provided with a multi-layer annular array of mounting holes from the outside to the inside; the micro-hole cast-in-place piles are inserted one-to-one into the mounting holes of the multi-layer annular array to form the multi-layer annular array of micro-hole cast-in-place piles.

[0013] According to the wind turbine foundation provided by this utility model, the spacing between two adjacent layers of micro-perforated piles in a ring array is greater than or equal to 3 times the diameter of the micro-perforated pile, and the distance between the center of the outermost micro-perforated pile and the outer edge of the foundation cap is greater than or equal to 1.5 times the diameter of the micro-perforated pile.

[0014] According to the wind turbine foundation provided by this utility model, the length of the micro-hole cast-in-place pile inserted into the mounting hole of the foundation cap is greater than or equal to 50mm; the length of the longitudinal reinforcement extending into the mounting hole of the foundation cap is greater than or equal to 35 times the diameter of the longitudinal reinforcement.

[0015] According to the wind turbine foundation provided by this utility model, each of the micro-hole cast-in-place piles is provided with multiple inner reinforcing rings, and the multiple inner reinforcing rings are evenly spaced along the length direction of the longitudinal reinforcement.

[0016] According to the wind turbine foundation provided by this utility model, the inner reinforcing ring includes:

[0017] Ring reinforcement, wherein the diameter of the ring reinforcement is greater than or equal to 14 mm.

[0018] According to the wind turbine foundation provided by this utility model, the diameter of the spiral stirrup is greater than or equal to 6mm, and the spacing of the spiral stirrup is greater than or equal to 200mm.

[0019] According to the wind turbine foundation provided by this utility model, the micro-pore cast-in-place pile is filled with fine stone concrete.

[0020] According to the wind turbine foundation provided by this utility model, the outer diameter of the micro-hole cast-in-place pile is in the range of 300mm~400mm.

[0021] This utility model also provides a wind turbine generator set, including: the wind turbine foundation of this utility model embodiment.

[0022] This utility model provides a wind turbine foundation, comprising: a foundation cap and multiple micro-hole cast-in-place piles. Multiple mounting holes are provided at the bottom of the foundation cap; one end of each micro-hole cast-in-place pile is inserted into a micro-hole in the foundation soil below the foundation cap, and the other end is inserted into a mounting hole in the foundation cap. Each micro-hole cast-in-place pile includes: multiple longitudinal reinforcement bars, at least one helical stirrup, and at least one inner reinforcing ring. The multiple longitudinal reinforcement bars are arranged in a ring; the helical stirrup is wrapped around the outside of the longitudinal reinforcement bars; and the inner reinforcing ring supports the inside of the longitudinal reinforcement bars. This utility model provides a wind turbine foundation that uses micro-hole cast-in-place piles to fix the foundation cap. These piles are adapted to the micro-holes in the foundation. Compared to existing technologies that drill larger diameter holes and use larger diameter cast-in-place piles, this utility model's micro-holes and micro-hole cast-in-place piles utilize simpler construction equipment, have faster drilling speeds, and shorten the construction time for a single pile. The small diameter design reduces the amount of foundation concrete and steel reinforcement, decreases rock excavation, and lowers material costs. Furthermore, multiple micro-hole cast-in-place piles can be constructed simultaneously, further improving overall construction efficiency. The construction technology for the micro-hole cast-in-place piles and foundation cap is relatively mature, with close coordination between each construction stage, effectively shortening the foundation construction cycle. The micro-hole cast-in-place piles provided by this utility model achieve external support for the longitudinal reinforcement through a single spiral stirrup and internal support through an inner reinforcing ring, enhancing the overall strength of the micro-hole cast-in-place pile and meeting the requirements for small-diameter drilling and foundation cap fixation.

[0023] Furthermore, the wind turbine generator set provided by this utility model has the same advantages as described above, since it includes the wind turbine foundation in the above embodiments of this utility model. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a bottom view of a wind turbine foundation provided in one embodiment of this utility model.

[0026] Figure 2 yes Figure 1 Cross-sectional view of AA.

[0027] Figure 3 This is a schematic diagram of the structure of a microporous cast-in-place pile provided in one embodiment of the present invention.

[0028] Figure 4 yes Figure 3 Cross-sectional view of bb in the middle.

[0029] Figure 5 This is a partial schematic diagram of a microporous cast-in-place pile provided in one embodiment of the present invention.

[0030] Figure label:

[0031] 100: Foundation cap; 200: Micro-hole cast-in-place pile; 201: Longitudinal reinforcement; 202: Spiral stirrup; 203: Inner reinforcing ring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] The following is combined with Figures 1-5 This invention describes a wind turbine foundation. The wind turbine foundation includes: a foundation cap 100 and multiple micro-hole cast-in-place piles 200.

[0034] The foundation cap 100 has multiple mounting holes at its bottom; one end of the micro-hole cast-in-place pile 200 is inserted into a micro-hole in the foundation below the foundation cap 100, and the other end of the micro-hole cast-in-place pile 200 is inserted into a mounting hole in the foundation cap 100.

[0035] The micro-hole cast-in-place pile 200 includes: multiple longitudinal bars 201, at least one spiral stirrup 202, and at least one inner reinforcing ring 203. The multiple longitudinal bars 201 are arranged in a ring; the spiral stirrup 202 is wrapped around the outside of the longitudinal bars 201; and the inner reinforcing ring 203 is supported on the inside of the longitudinal bars 201.

[0036] Specifically, the wind turbine foundation of this invention consists of a foundation platform 100 (i.e., the wind turbine platform) and multiple micro-hole cast-in-place piles 200. The bottom of the foundation platform 100 has mounting holes for inserting the micro-hole cast-in-place piles 200, the inner diameter of which should match the outer diameter of the micro-hole cast-in-place pile 200. Multiple micro-holes are drilled in the foundation for inserting the micro-hole cast-in-place piles 200, the inner diameter of which should match the outer diameter of the micro-holes. By employing micro-hole cast-in-place piles 200 to achieve the fixed installation of the foundation cap 100, which are adapted to the micro-holes in the foundation, compared with the existing technology of drilling larger diameter holes and larger diameter cast-in-place piles, the micro-holes and micro-hole cast-in-place piles 200 of this utility model use simple construction equipment, have a fast drilling speed, and can shorten the construction time of a single pile. The small diameter design reduces the amount of foundation concrete and steel reinforcement used, reduces the amount of rock excavation, and lowers material costs. At the same time, multiple micro-hole cast-in-place piles 200 can be constructed simultaneously, further improving the overall construction efficiency. The construction technology of micro-hole cast-in-place piles 200 and foundation cap 100 is relatively mature, and the connection between each construction link is close, which can effectively shorten the foundation construction cycle.

[0037] Generally, the foundation cap 100 adopts a large-volume reinforced concrete structure, typically circular in shape, to accommodate the shape and stress characteristics of the wind turbine tower. The top and bottom of the cap slab are equipped with vertically orthogonal radial and circumferential reinforcing meshes. The diameter and spacing of the reinforcing bars are calculated and determined based on the wind turbine load and cap dimensions to ensure sufficient strength and crack resistance. Considering the significant reaction force of the micro-hole cast-in-place piles 200 on the cap, the edge thickness of the cap is not less than 1m to ensure good rigidity of the foundation cap 100. The cap diameter is not less than 17m to allow for simultaneous drilling operations by two drilling rigs within the foundation pit, thereby accelerating the drilling process.

[0038] Specifically, the micro-hole cast-in-place pile 200 is supported by a steel cage and formed by pouring concrete. The steel cage consists of longitudinal bars 201, spiral stirrups 202, and an inner reinforcing ring 203. The longitudinal bars 201 are arranged along the length of the micro-hole cast-in-place pile 200, that is, along the depth of the borehole, and multiple longitudinal bars 201 form a ring structure in cross-section. To support this ring structure, the spiral stirrups 202 are wrapped around the outside of the longitudinal bars 201, providing external support for the longitudinal bars 201. An inner reinforcing ring 203 structure is used on the inside of the longitudinal bars 201 to provide internal support. The micro-hole cast-in-place pile 200 provided by this utility model can achieve the effect of external support for the longitudinal bars 201 through a single spiral stirrup 202, and the inner reinforcing ring 203 provides the effect of internal support, thereby strengthening the overall strength of the micro-hole cast-in-place pile 200 and meeting the needs of small-diameter boreholes and the fixation of the foundation cap 100.

[0039] This utility model provides a wind turbine foundation that, due to its small-sized borehole and micro-hole cast-in-place pile 200, is particularly suitable for wind turbine foundation installation on rock foundations, greatly reducing the amount of rock excavation and the amount of concrete used in the wind turbine foundation. This achieves a considerable cost reduction and efficiency improvement goal.

[0040] This utility model provides a wind turbine foundation, which includes a foundation cap 100 and multiple micro-hole cast-in-place piles 200. Multiple mounting holes are provided at the bottom of the foundation cap 100; one end of each micro-hole cast-in-place pile 200 is inserted into a micro-hole in the foundation soil below the foundation cap 100, and the other end is inserted into a mounting hole in the foundation cap 100. Each micro-hole cast-in-place pile 200 includes multiple longitudinal reinforcement bars 201, at least one helical stirrup 202, and at least one inner reinforcing ring 203. The multiple longitudinal reinforcement bars 201 are arranged in a ring; the helical stirrup 202 is wound around the outside of the longitudinal reinforcement bars 201; and the inner reinforcing ring 203 supports the inside of the longitudinal reinforcement bars 201. This utility model provides a wind turbine foundation that uses micro-hole cast-in-place piles 200 to fix the foundation cap 100. These piles are adapted to the micro-holes in the foundation. Compared to existing technologies that drill larger diameter holes and use larger diameter cast-in-place piles, the micro-holes and micro-hole cast-in-place piles 200 of this utility model use simpler construction equipment, have faster drilling speeds, and can shorten the construction time for a single pile. The small diameter design reduces the amount of foundation concrete and steel reinforcement, reduces rock excavation, and lowers material costs. Simultaneously, multiple micro-hole cast-in-place piles 200 can be constructed at the same time, further improving overall construction efficiency. The construction technology of the micro-hole cast-in-place piles 200 and the foundation cap 100 is relatively mature, with close connections between each construction stage, effectively shortening the foundation construction cycle. The micro-hole cast-in-place piles 200 provided by this utility model achieve external support for the longitudinal reinforcement 201 through a single spiral stirrup 202, and provide internal support through an inner reinforcing ring 203, strengthening the overall strength of the micro-hole cast-in-place piles 200 and meeting the requirements for small-diameter drilling and fixing of the foundation cap 100.

[0041] In one embodiment of this utility model, the foundation cap 100 is provided with a multi-layered annular array of mounting holes from the outside to the inside; the micro-hole cast-in-place piles 200 are inserted one-to-one into the mounting holes of the multi-layered annular array to form a multi-layered annular array of micro-hole cast-in-place piles 200. Preferably, as shown... Figure 1 and Figure 2 As shown, the bottom of the foundation cap 100 has a three-layer annular array of mounting holes from the outside to the inside. The outermost layer has 50 mounting holes, the middle layer has 46 mounting holes, and the innermost layer has 38 mounting holes. Correspondingly, each mounting hole contains a micro-hole cast-in-place pile 200, which is the same as the number of through holes.

[0042] In the above embodiment, the foundation cap 100 is installed and fixed by setting mounting holes in a multi-layer annular array and micro-hole cast-in-place piles 200 in a multi-layer annular array. The foundation cap 100 effectively transfers the vertical load, horizontal load, and bending moment from the wind turbine to the micro-hole cast-in-place piles 200 in the multi-layer annular array, and further to the foundation.

[0043] In one embodiment of this utility model, the spacing between two adjacent layers of annular array microporous cast-in-place piles 200 is greater than or equal to three times the diameter of the microporous cast-in-place pile 200, and the distance between the center of the outermost layer of microporous cast-in-place piles 200 and the outer edge of the foundation cap 100 is greater than or equal to 1.5 times the diameter of the microporous cast-in-place piles 200. Through the above-mentioned dimensional optimization, the spacing between the microporous cast-in-place piles 200 in each layer is optimized, ensuring that the annular array of microporous cast-in-place piles 200 has good strength, thus guaranteeing their support and fixation function for the foundation cap 100.

[0044] In one embodiment of this utility model, the length of the micro-perforated pile 200 inserted into the mounting hole of the foundation cap 100 is greater than or equal to 50 mm; the length of the longitudinal reinforcement 201 extending into the mounting hole of the foundation cap 100 is greater than or equal to 35 times the diameter of the longitudinal reinforcement 201. Through this dimensional optimization, the insertion depth of the micro-perforated pile 200 into the foundation cap 100 is ensured, as is the insertion depth of the longitudinal reinforcement 201 into the foundation cap 100, thus guaranteeing its fixing effect on the foundation cap 100. Generally, the longitudinal reinforcement 201 penetrates the pile body of the micro-perforated pile 200 and extends from the upper end.

[0045] In one embodiment of this utility model, each micro-hole cast-in-place pile 200 is provided with multiple inner reinforcing rings, and the multiple inner reinforcing rings are evenly spaced along the length direction of the longitudinal reinforcement 201. In this embodiment, by longitudinally arranging multiple inner reinforcing rings 203 and spacing them at the same distance along the length direction (i.e., depth direction) of the longitudinal reinforcement 201, the inner support effect is ensured.

[0046] In one embodiment of this utility model, the outer diameter of the micro-hole cast-in-place pile 200 ranges from 300mm to 400mm, with a preferred outer diameter of 300mm. Considering the characteristics of strong integrity, high cohesion, and high lateral and end resistance of the rock foundation, a shorter pile length is required. The pile length of the micro-hole cast-in-place pile 200 does not exceed 5m, which facilitates drilling in one go without the need for secondary extension of the drill rod.

[0047] In one embodiment of this utility model, the micro-hole cast-in-place pile 200 is filled with fine stone concrete, and the aggregate particle size is strictly limited to no more than 15mm to ensure the smooth progress of concrete pouring. At the same time, the concrete strength grade must not be less than C30.

[0048] In one embodiment of this utility model, the inner reinforcing ring includes: a ring rib with a diameter greater than or equal to 14 mm. The diameter of the spiral stirrup 202 is greater than or equal to 6 mm, and the spacing of the spiral stirrup 202 is greater than or equal to 200 mm, meaning that the spacing between the upper and lower rings of the spiral stirrup 202 is not less than 200 mm.

[0049] This utility model also provides a wind turbine generator set. The wind turbine generator set includes: the wind turbine foundation as described in the above embodiments of this utility model.

[0050] The wind turbine generator set provided by this utility model has the same advantages as described above because it includes the wind turbine foundation in the above embodiments of this utility model.

[0051] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fan foundation, characterized by, include: The foundation base (100) has multiple mounting holes at its bottom; Multiple micro-hole cast-in-place piles (200), one end of which is inserted into a micro-hole in the foundation located below the foundation cap (100), and the other end of which is inserted into the mounting hole of the foundation cap (100), wherein the micro-hole cast-in-place pile (200) comprises: Multiple longitudinal ribs (201) are arranged in a ring; Spiral stirrups (202) are wound around the outside of the longitudinal reinforcement (201); The inner reinforcing ring (203) is supported on the inner side of the longitudinal rib (201).

2. The wind turbine foundation according to claim 1, wherein The foundation cap (100) is provided with a multi-layered annular array of mounting holes from the outside to the inside; the micro-hole cast-in-place piles (200) are inserted one by one into the mounting holes of the multi-layered annular array to form the multi-layered annular array of micro-hole cast-in-place piles (200).

3. The wind turbine foundation according to claim 2, wherein The spacing between two adjacent layers of micro-hole cast-in-place piles (200) in a ring array is greater than or equal to 3 times the diameter of the micro-hole cast-in-place pile (200), and the distance between the center of the outermost micro-hole cast-in-place pile (200) and the outer edge of the foundation cap (100) is greater than or equal to 1.5 times the diameter of the micro-hole cast-in-place pile (200).

4. The wind turbine foundation according to claim 1, wherein The length of the micro-hole cast-in-place pile (200) inserted into the mounting hole of the foundation cap (100) is greater than or equal to 50 mm; the length of the longitudinal reinforcement (201) extending into the mounting hole of the foundation cap (100) is greater than or equal to 35 times the diameter of the longitudinal reinforcement (201).

5. The wind turbine foundation according to claim 1, wherein Each of the micro-hole cast-in-place piles (200) is provided with multiple inner reinforcing rings, and the multiple inner reinforcing rings are evenly spaced along the length direction of the longitudinal reinforcement (201).

6. The wind turbine foundation according to claim 5, wherein The inner reinforcing ring includes: Ring reinforcement, wherein the diameter of the ring reinforcement is greater than or equal to 14 mm.

7. The wind turbine foundation according to claim 1, wherein The diameter of the spiral stirrup (202) is greater than or equal to 6 mm, and the spacing of the spiral stirrup (202) is greater than or equal to 200 mm.

8. The wind turbine foundation according to claim 1, wherein The micro-hole cast-in-place pile (200) is filled with fine stone concrete.

9. The fan foundation according to any one of claims 1 to 8, characterized in that The outer diameter of the micro-hole cast-in-place pile (200) ranges from 300mm to 400mm.

10. A wind generator set, characterised in that, include: The wind turbine foundation as described in any one of claims 1 to 9.

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