A fan foundation structure

Abstract

The utility model discloses a fan foundation structure relates to building engineering technical field. This fan foundation structure includes cushion layer, anchor bolt subassembly and main body layer, and anchor bolt subassembly sets up in the top of cushion layer and is located the inside of main body layer, anchor bolt subassembly includes upper anchor plate, lower anchor plate and anchor rod, upper anchor plate and lower anchor plate vertical interval setting, and anchor rod is drawn together between upper anchor plate and lower anchor plate, main body layer is the structure of cone platform, and it is formed by the steel bar lap joint and layered pouring, anchor bolt subassembly concentric setting in the reinforcement cage of main body layer's correspondence, upper anchor plate and lower anchor plate are annular structure, and it is formed by two semicircle ring connection. The utility model provides a fan foundation structure, and its structure is reasonable, adopts anchor bolt subassembly to form fan support layer to improve the ability of fan foundation structure center area to bear load, guarantees the security of fan unit use.

Description

Technical Field

[0001] This utility model belongs to the field of building engineering technology and relates to a wind turbine foundation structure. Background Technology

[0002] In the wind power sector, the foundation structure of wind turbines is crucial, as it is related to the installed capacity of the turbines. A larger installed capacity results in a larger load transferred to the turbine foundation.

[0003] In the existing technology, in order to ensure the strength of the wind turbine foundation structure, integral reinforced concrete is used for casting, which involves a large amount of construction work and increases the construction cost of the wind turbine foundation structure to a certain extent.

[0004] Therefore, there is an urgent need to design a wind turbine foundation structure to solve the technical problems existing in the current technology. Utility Model Content

[0005] The purpose of this utility model is to at least partially solve some of the technical problems existing in the prior art, and to provide a wind turbine foundation structure with a reasonable structure. It uses anchor bolt assemblies to form a wind turbine support layer to improve the load-bearing capacity of the central area of ​​the wind turbine foundation structure and ensure the safety of the wind turbine unit.

[0006] To solve the above-mentioned technical problems, this utility model provides a wind turbine foundation structure, which includes a cushion layer, an anchor bolt assembly, and a main body layer. The anchor bolt assembly is disposed above the cushion layer and located inside the main body layer. The anchor bolt assembly includes an upper anchor plate, a lower anchor plate, and an anchor rod. The upper and lower anchor plates are vertically spaced apart, and the anchor rod is connected between the upper and lower anchor plates. The main body layer is a frustum-shaped structure, which is formed by overlapping and layered casting of reinforcing bars. The anchor bolt assembly is concentrically disposed in the corresponding reinforcing cage of the main body layer. The upper and lower anchor plates are annular structures, which are formed by connecting two semi-circular rings.

[0007] In some embodiments, the cushion layer is provided with a fan cable pre-embedded pipe, a drainage pre-embedded pipe and a positioning pre-embedded component inside, which are pre-embedded and the cushion layer is constructed on them.

[0008] In some embodiments, the concentricity of the upper anchor plate and the lower anchor plate is less than or equal to 3 mm.

[0009] In some embodiments, the horizontality of the lower anchor bolt is less than or equal to 3 mm.

[0010] In some embodiments, the upper and lower anchor plates are provided with anchor bolt holes, and after concrete pouring, the coaxiality between the anchor rod and the anchor bolt hole is less than or equal to 1 mm.

[0011] In some embodiments, the reinforcing cage corresponding to the main layer is fixed by lap splicing, with a lap length of 35D and the joint area within the same cross section being less than 50% of the total area of ​​the reinforcing bars, where D is the diameter of the reinforcing bars.

[0012] In some embodiments, the template corresponding to the main body layer is a steel template, and the outer contour of the steel template is reinforced by steel wire rope and steel pipe diagonal bracing.

[0013] In some embodiments, the grounding resistance of the wind turbine foundation structure is ≤4Ω, and it is grounded by vertical grounding and flat steel connection; the grounding device of the wind turbine foundation structure is buried at a depth ≥0.8m.

[0014] In some embodiments, the anchor bolt assembly is cast to form a wind turbine support layer, and the wind turbine support layer is formed by secondary grouting.

[0015] In some embodiments, before the secondary grouting of the wind turbine support layer, the concrete surface in contact is thoroughly roughened and cleaned, and the foundation surface is fully moistened to prevent water accumulation before grouting; the secondary grouting should be carried out from one side until it overflows from the other side, and the continuous grouting should not be interrupted.

[0016] The beneficial effects of this utility model are:

[0017] This utility model provides a wind turbine foundation structure with a reasonable structure. It uses anchor bolt assemblies to form a wind turbine support layer to improve the load-bearing capacity of the central area of ​​the wind turbine foundation structure and ensure the safety of the wind turbine unit. Attached Figure Description

[0018] The advantages of this invention will become clearer and easier to understand through the following detailed description in conjunction with the accompanying drawings, which are merely illustrative and do not limit the invention, wherein:

[0019] Figure 1 This is a schematic diagram of a fan foundation structure according to the present invention;

[0020] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 3 This is a schematic diagram of the upper anchor plate provided in one embodiment of the present invention. Detailed Implementation

[0022] Figures 1 to 3 This is a schematic diagram of a wind turbine foundation structure described in this application. The present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0023] The embodiments described herein are specific implementations of this utility model, used to illustrate the concept of this utility model. They are all illustrative and exemplary, and should not be construed as limiting the implementation methods or scope of this utility model. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0024] The accompanying drawings in this specification are schematic diagrams used to illustrate the concept of this utility model, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly show the structure of the components of the embodiments of this utility model, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0025] A schematic diagram of a wind turbine foundation structure described in this utility model is shown below. Figure 1 As shown. The wind turbine foundation structure includes a cushion layer 10, an anchor bolt assembly 20, and a main body layer 30. The anchor bolt assembly 20 is disposed above the cushion layer 10 and located inside the main body layer 30.

[0026] Figure 2 yes Figure 1 The enlarged view at point A shows that the anchor bolt assembly 20 includes an upper anchor plate 21, a lower anchor plate 22, and an anchor rod 23. The upper anchor plate 21 and the lower anchor plate 22 are vertically spaced apart, and the anchor rod 23 is connected between the upper anchor plate 21 and the lower anchor plate 22.

[0027] The main layer 30 is a frustum structure, formed by overlapping and layered casting of reinforcing bars; the anchor bolt assemblies 20 are concentrically arranged in the corresponding reinforcing cage of the main layer 30. Figure 3 The upper anchor plate 21 and lower anchor plate 22 shown are ring structures, which are formed by connecting two semi-circular rings.

[0028] In this utility model, the upper anchor plate 21 and the lower anchor plate 22 have roughly the same structure, which is a semi-circular structure with anchor bolt holes 20a provided on it, such as... Figure 3 As shown, the anchor bolt holes 20a are respectively located near the inner and outer edges of the upper anchor plate 21 and the lower anchor plate 22, and the anchor rod 23 passes through the anchor bolt holes 20a and is fixed between the upper anchor plate 21 and the lower anchor plate 22.

[0029] In this utility model, the interior of the cushion layer 10 is provided with a fan cable pre-embedded pipe, a drainage pre-embedded pipe and a positioning pre-embedded component, which are pre-embedded and the cushion layer 10 is constructed on it.

[0030] The concentricity of the upper anchor plate 21 and the lower anchor plate 22 is less than or equal to 3 mm, and the horizontality of the lower anchor rod is less than or equal to 3 mm.

[0031] The upper anchor plate 21 and the lower anchor plate 22 are equipped with anchor bolt holes 20a. After the concrete is poured, the coaxiality between the anchor rod 23 and the anchor bolt hole 20a is less than or equal to 1mm.

[0032] The following is a brief description of the general construction method of the wind turbine foundation structure described in this utility model, which includes:

[0033] Step 1: Measure and mark out the foundation excavation dimensions according to the installation location of the wind turbine; after excavating to the bottom of the trench, level and compact the surface, and test the bearing capacity of the foundation for different geological conditions. If the bearing capacity does not meet the design requirements, foundation treatment shall be carried out; install the corresponding number of wind turbine cable pre-embedded pipes, drainage pre-embedded pipes and positioning pre-embedded parts according to the design drawings, and pour the foundation layer 10.

[0034] Step 2: Install the anchor bolt assembly 20 on site, count the number of parts and check whether the upper anchor plate 21 and lower anchor plate 22 are deformed, and whether the anchor rod 23 is damaged or bent or has other appearance quality defects. At the same time, cover it to prevent rust and pollution.

[0035] Step 3: Before installing the lower anchor plate 22, check whether the position and quantity of the embedded parts are correct. At the same time, use the connecting plate and bolts to assemble the two half rings of the anchor plate into a complete ring. Use the support screws to weld and fix the lower anchor plate 22 and the embedded parts, and mark the position of the positioning anchor bolt on the lower anchor plate 22. Install the positioning anchor bolt and anchor rod 23.

[0036] After the anchor plate and anchor rod 23 are installed, adjust the concentricity, elevation and level of the upper anchor plate 21 and the lower anchor plate 22. After confirming that there are no errors, tighten the lower nut to 300 N•m and fix it.

[0037] Step 4: Construct the steel reinforcement cage corresponding to the main layer 30 and erect the foundation formwork;

[0038] Step 5: Pour the main layer 30 in layers and perform curing treatment.

[0039] In this utility model, the steel cage corresponding to the main layer 30 is fixed by lap splicing, with a lap length of 35D and the joint area within the same cross section being less than 50% of the total area of ​​the steel bars, where D is the diameter of the steel bars.

[0040] The template corresponding to the main layer 30 is a steel template, and the outer contour of the steel template is reinforced by steel wire rope and steel pipe diagonal bracing.

[0041] In some embodiments, the grounding resistance of the wind turbine foundation structure is ≤4Ω, and it is grounded by vertical grounding and flat steel connection; the grounding device of the wind turbine foundation structure is buried at a depth ≥0.8m.

[0042] In this invention, the anchor bolt assembly 20 is cast to form the fan support layer 40, and the fan support layer 40 is formed by secondary grouting.

[0043] Before the secondary grouting of the wind turbine support layer 40, the concrete surface in contact with it should be thoroughly roughened and cleaned. The foundation surface should be fully moistened and free of water before grouting. The secondary grouting should be carried out from one side until it overflows from the other side, and the grouting should be continuous without interruption to ensure the overall structural strength of the wind turbine foundation.

[0044] Compared with the shortcomings and deficiencies of existing technologies, the wind turbine foundation structure provided by this utility model has a reasonable structure and uses anchor bolt assemblies to form a wind turbine support layer, thereby improving the load-bearing capacity of the central area of ​​the wind turbine foundation structure and ensuring the safety of the wind turbine unit.

[0045] This utility model is not limited to the above-described embodiments. Anyone can derive other products in various forms under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A wind turbine foundation structure, characterized in that, The structure includes a cushion layer (10), an anchor bolt assembly (20), and a main body layer (30). The anchor bolt assembly (20) is located above the cushion layer (10) and inside the main body layer (30). The anchor bolt assembly (20) includes an upper anchor plate (21), a lower anchor plate (22), and an anchor rod (23). The upper anchor plate (21) and the lower anchor plate (22) are vertically spaced apart, and the anchor rod (23) is connected between the upper anchor plate (21) and the lower anchor plate (22). The main body layer (30) is a frustum structure, which is formed by overlapping steel bars and layered casting. The anchor bolt assembly (20) is concentrically arranged in the corresponding steel cage of the main body layer (30). The upper anchor plate (21) and the lower anchor plate (22) are annular structures, which are formed by connecting two semi-circular rings.

2. The wind turbine foundation structure according to claim 1, characterized in that, The interior of the cushion layer (10) is provided with a pre-embedded pipe for the fan cable, a pre-embedded pipe for drainage and a pre-embedded positioning component, which are pre-embedded and the cushion layer is constructed on it.

3. The wind turbine foundation structure according to claim 1, characterized in that, The concentricity of the upper anchor plate (21) and the lower anchor plate (22) is less than or equal to 3 mm.

4. The wind turbine foundation structure according to claim 1, characterized in that, The horizontality of the lower anchor plate (22) is less than or equal to 3 mm.

5. The wind turbine foundation structure according to claim 3, characterized in that, The upper anchor plate (21) and lower anchor plate (22) are equipped with anchor bolt holes. After the concrete is poured, the coaxiality between the anchor rod (23) and the anchor bolt hole is less than or equal to 1 mm.

6. The wind turbine foundation structure according to claim 5, characterized in that, The main layer (30) is fixed by lap splicing, with a lap length of 35D and the joint area within the same section is less than 50% of the total area of ​​the steel bars, where D is the diameter of the steel bars.

7. The wind turbine foundation structure according to claim 5, characterized in that, The template corresponding to the main layer (30) is a steel template, and the outer contour of the steel template is reinforced by steel wire rope and steel pipe diagonal bracing.

8. The wind turbine foundation structure according to claim 5, characterized in that, The grounding resistance of the wind turbine foundation structure is ≤4Ω, and it is grounded by vertical grounding and flat steel connection; the grounding device of the wind turbine foundation structure is buried at a depth of ≥0.8m.

9. The wind turbine foundation structure according to claim 5, characterized in that, The anchor bolt assembly (20) is cast to form a fan support layer (40), and the fan support layer (40) is formed by secondary grouting.

10. The wind turbine foundation structure according to claim 9, characterized in that, Before the secondary grouting of the fan support layer (40), the concrete surface in contact should be roughened and cleaned thoroughly. The foundation surface should be fully moistened and free of water before grouting. The secondary grouting should be carried out from one side until it overflows from the other side, and the grouting should be continuous without interruption.

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