Steel-concrete tower drum multi-pile prestressed drum combined foundation and tower drum

Abstract

The utility model provides a multi-pile prestressed cylinder combined foundation of a reinforced concrete tower cylinder. The multi-pile prestressed cylinder combined foundation comprises an anchoring section, a cylinder-shaped foundation, a supporting assembly and steering prestressed tendons, the anchoring section is used for anchoring prestressed tendons on the reinforced concrete tower barrel; the cylindrical foundation is arranged at the lower end of the anchoring section; a plurality of foundation hole channels are formed in the circumferential direction of the cylindrical foundation; the multiple supporting assemblies are arranged in the circumferential direction of the anchoring section at intervals so as to support the barrel type foundation. The steering prestressed tendons penetrate through the foundation hole channels, one ends of the steering prestressed tendons are anchored to the anchoring sections, and the other ends of the steering prestressed tendons are anchored to the supporting assemblies. The prestressed tendons on the reinforced concrete tower barrel are anchored on the anchoring section, so that the barrel-shaped foundation is not provided with a cavity any more, the bearing capacity of the barrel-shaped foundation is improved, the diameter of the barrel-shaped foundation can be reduced, and the purpose of reducing the occupied area is achieved; and the two ends of the steering prestressed tendons are anchored to the anchoring sections and the supporting assemblies correspondingly, so that the overall bearing performance of the foundation structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine technology, specifically to a steel-concrete tower multi-pile prestressed cylinder combined foundation and tower. Background Technology

[0002] Wind turbine foundations are a crucial component of wind farm construction, affecting not only the safe and reliable operation of the wind farm but also its investment. As wind farm construction expands across more regions, natural foundations in areas with poor engineering properties, such as cohesive soil, silt, loess, and fill, often fail to meet the requirements for wind turbine foundation construction, necessitating foundation treatment.

[0003] The rapid updates and iterations of large-megawatt wind turbines have led to increased requirements for the load-bearing capacity of low foundations. Traditional hybrid tower extended foundations require internal tensioning cavities to ensure the foundation's load-bearing capacity. However, the presence of these cavities necessitates an increase in the foundation's diameter, resulting in a larger footprint. Furthermore, the cavities require the installation of molds, leading to higher costs. Utility Model Content

[0004] In view of the above-mentioned problems in the existing technology, the technical problem to be solved by this utility model is that: the traditional hybrid tower extended foundation needs to set up a cavity for tensioning inside. In order to ensure the bearing capacity of the foundation, the diameter of the foundation needs to be increased due to the setting of the cavity, so the footprint is large; and the cavity needs to be set up with mold, which is costly.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a steel-concrete tower multi-pile prestressed cylinder composite foundation, comprising:

[0006] Anchoring section, used to anchor the prestressed tendons on the steel-concrete tower body;

[0007] A cylindrical foundation is provided at the lower end of the anchoring section, and the upper end of the cylindrical foundation has the same diameter as the lower end of the anchoring section; the cylindrical foundation has multiple foundation ducts in the circumferential direction, and the foundation ducts are arranged parallel to the axis of the cylindrical foundation.

[0008] Support components, wherein a plurality of support components are spaced apart along the circumferential direction of the anchoring section to support the cylindrical foundation; and

[0009] The directional prestressing tendon passes through the foundation duct, with one end of the directional prestressing tendon anchored to the anchorage section and the other end anchored to the support assembly.

[0010] Preferably, a plurality of first prestressed ducts and second prestressed ducts are respectively opened in the circumferential direction on the anchoring section; the prestressed tendons on the steel-concrete tower body pass through the first prestressed ducts and are anchored below the anchoring section; the second prestressed ducts are connected to the foundation ducts, and the directional prestressed tendons pass through the foundation ducts and second prestressed ducts and are anchored above the anchoring section.

[0011] Preferably, the outer surface of the upper end of the anchoring section is shaped like a frustum, and the second prestressed duct has the same outline shape as the outer surface of the anchoring section.

[0012] Preferably, the plurality of the support components are arranged in a circular array with the axis of the anchoring section as the center.

[0013] Preferably, the support assembly includes: a connecting diagonal rod and a pile body, one end of the connecting diagonal rod is installed on the cylindrical foundation, and the other end of the connecting diagonal rod is inclined downward and installed on the pile body; the pile body is buried underground.

[0014] Preferably, the connecting diagonal bar has a connecting channel along its length, and the connecting channel is connected to the lower end of the foundation channel. After the steering prestressing tendon passes through the foundation channel and the connecting channel, it is anchored to the end of the connecting diagonal bar away from the cylindrical foundation.

[0015] Preferably, a pile shoe is installed at the lower end of the pile.

[0016] Preferably, a triangular cone is installed in the circumferential direction of the pile shoe.

[0017] Preferably, the pile shoe has multiple ventilation holes in the circumferential direction.

[0018] A tower, comprising: a steel-concrete tower multi-pile prestressed cylinder composite foundation as described in any one of the above.

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] 1. In this utility model, by anchoring the prestressing tendons on the steel-concrete tower body to the anchorage section, the cylindrical foundation no longer needs to have a cavity, increasing the bearing capacity of the cylindrical foundation and thus reducing the diameter of the cylindrical foundation, thereby reducing the footprint. Furthermore, by raising the prestressing tendons on the steel-concrete tower body to the upper part of the cylindrical foundation, the internal cavity structure of the cylindrical foundation is not required, making prestressing tensioning construction convenient. Moreover, the concrete tower foundation does not need to have a cavity mold, reducing foundation costs. Then, by anchoring the two ends of the turning prestressing tendons to the anchorage section and the support component respectively, and penetrating the cylindrical foundation through the foundation duct, the overall bearing capacity of the foundation structure is improved.

[0021] 2. In this utility model, the pile body bears the load of the cylindrical foundation through the connecting diagonal rod. Based on the large lever arm of the connecting diagonal rod, it provides a large bending bearing capacity, improves the overturning resistance, and enhances the seismic performance.

[0022] 3. In this utility model, the pile shoe can play a guiding and sealing role during the pile sinking construction, and the bottom pile shoe can improve the bearing capacity of the pile during the operation stage; the triangular cone can easily pierce the soil, reduce soil resistance, reduce the difficulty of driving the pile, and improve the bearing capacity of the pile; the ventilation hole can realize the air release during grouting. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 This is a three-dimensional structural schematic view of the steel-concrete tower multi-pile prestressed cylinder combined foundation provided in the embodiment of this utility model.

[0025] Figure 2 This is a three-dimensional structural schematic view of the anchoring section provided in an embodiment of the present invention.

[0026] Figure 3 This is a three-dimensional structural schematic view of the cylindrical foundation provided in an embodiment of the present invention.

[0027] Figure 4 This is a three-dimensional structural schematic view of the pile shoe provided in an embodiment of this utility model.

[0028] Figure label:

[0029] 1-Anchorage section, 11-First prestressed duct, 12-Second prestressed duct,

[0030] 2-Cylindrical foundation, 21-Foundation duct,

[0031] 3-Support assembly, 31-Connecting diagonal brace, 32-Pile body, 33-Connecting duct,

[0032] 4-Pile shoe, 41-Triangular cone, 42-Ventilation hole. Detailed Implementation

[0033] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0034] In this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] See Figures 1-4 The present invention provides an embodiment of a multi-pile prestressed tube composite foundation for a steel-concrete tower, comprising: an anchoring section 1, a cylindrical foundation 2, support components 3, and directional prestressing tendons; the anchoring section 1 is used to anchor the prestressing tendons on the steel-concrete tower body; the cylindrical foundation 2 is located at the lower end of the anchoring section 1, and the upper end of the cylindrical foundation 2 has the same diameter as the lower end of the anchoring section 1; multiple foundation ducts 21 are provided in the circumferential direction of the cylindrical foundation 2, and the foundation ducts 21 are arranged parallel to the axis of the cylindrical foundation 2; multiple support components 3 are spaced apart along the circumferential direction of the anchoring section 1 to support the cylindrical foundation 2; furthermore, the multiple support components 3 are arranged in a circular array with the axis of the anchoring section 1 as the center; the directional prestressing tendons pass through the foundation ducts 21, and one end of the directional prestressing tendon is anchored to the anchoring section 1, and the other end of the directional prestressing tendon is anchored to the support component 3.

[0037] In specific implementation, by anchoring the prestressing tendons on the steel-concrete tower body to the anchoring section 1, the cylindrical foundation 2 no longer needs to have a cavity, increasing the bearing capacity of the cylindrical foundation 2 and thus reducing its diameter, thereby reducing the footprint. Furthermore, by raising the prestressing tendons on the steel-concrete tower body to the upper part of the cylindrical foundation 2, the internal cavity structure of the cylindrical foundation is not required, making prestressing tensioning construction convenient. Moreover, the steel-concrete tower foundation does not need to have a cavity mold, reducing foundation costs. Then, by anchoring the two ends of the diverting prestressing tendons to the anchoring section 1 and the support component 3 respectively, and penetrating the cylindrical foundation 2 through the foundation duct 21, the overall bearing capacity of the foundation structure is improved.

[0038] See Figures 1-4 In other embodiments, multiple first prestressing ducts 11 and second prestressing ducts 12 are respectively formed in the circumferential direction on the anchoring section 1. The prestressing tendons on the reinforced concrete tower body pass through the first prestressing ducts 11 and are anchored below the anchoring section 1. The second prestressing ducts 12 are connected to the foundation ducts 21, and the directional prestressing tendons pass through the foundation ducts 21 and the second prestressing ducts 12 and are anchored above the anchoring section 1. The arrangement of the first prestressing ducts 11 and the second prestressing ducts 12 facilitates the anchoring of the prestressing tendons and directional prestressing tendons on the reinforced concrete tower body on the anchoring section 1. Specifically, the number of first prestressing ducts 11 and second prestressing ducts 12 is determined based on the wind turbine load during the tower design and foundation design stages. Furthermore, the outer surface of the upper end of the anchoring section 1 is shaped like a frustum, and the second prestressed duct 12 has the same outline shape as the outer surface of the anchoring section 1. By setting the upper end of the anchoring section 1 into a frustum shape, it can better adapt to the steel-concrete tower with a gradually decreasing upper diameter. The second prestressed duct 12 is also inclined inward to adapt to the change in the wall thickness of the upper end of the anchoring section 1.

[0039] See Figures 1-4 In other embodiments, the support assembly 3 includes a connecting diagonal rod 31 and a pile 32. One end of the connecting diagonal rod 31 is installed on the cylindrical foundation 2, and the other end of the connecting diagonal rod 31 is inclined downwards and installed on the pile 32; the pile 32 is buried underground. In specific implementation, the inclination angle of the connecting diagonal rod 31 is less than or equal to 45°; the pile 32 bears the load on the cylindrical foundation 2 through the connecting diagonal rod 31. Based on the large lever arm of the connecting diagonal rod 31, it provides a large bending bearing capacity, improves the overturning resistance, and enhances the seismic performance. Furthermore, a connecting channel 33 is opened in the length direction of the connecting diagonal rod 31, and the connecting channel 33 is connected to the lower end of the foundation channel 21. After the directional prestressing tendon passes through the foundation channel 21 and the connecting channel 33, it is anchored to the end of the connecting diagonal rod 31 away from the cylindrical foundation 2; by setting the connecting channel 33, the overall bearing capacity between the support assembly 3 and the cylindrical foundation 2 can be further improved.

[0040] See Figures 1-4In another embodiment, a pile shoe 4 is installed at the lower end of the pile body 32. The pile shoe 4 serves to guide and seal the pile body 32 during sinking construction, and its bottom position improves the bearing capacity of the pile body 32 during operation. Specifically, the pile shoe 4 has a height of 0.3-0.6m and a wall thickness of 10-40mm. Furthermore, a triangular cone 41 is installed circumferentially on the pile shoe 4. The triangular cone 41 facilitates piercing the soil, reduces soil resistance, eases the difficulty of driving the pile body 32, and improves the bearing capacity of the pile body 32. Furthermore, multiple ventilation holes 42 are provided circumferentially on the pile shoe 4. These ventilation holes 42 allow for air release during grouting.

[0041] See Figures 1-4 Another embodiment of this utility model is provided: a tower, comprising: the steel-concrete tower multi-pile prestressed cylinder composite foundation described in any of the above embodiments.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A composite foundation for a steel-concrete tower with multiple piles and prestressed tubes, characterized in that, include: Anchoring section, used to anchor the prestressed tendons on the steel-concrete tower body; A cylindrical foundation is provided at the lower end of the anchoring section, and the upper end of the cylindrical foundation has the same diameter as the lower end of the anchoring section; the cylindrical foundation has multiple foundation ducts in the circumferential direction, and the foundation ducts are arranged parallel to the axis of the cylindrical foundation. Support components, a plurality of such support components are spaced apart along the circumferential direction of the anchoring section to support the cylindrical foundation; and The directional prestressing tendon passes through the foundation duct, with one end of the directional prestressing tendon anchored to the anchorage section and the other end anchored to the support assembly.

2. The steel-concrete tower multi-pile prestressed cylinder composite foundation according to claim 1, characterized in that, Multiple first prestressed ducts and second prestressed ducts are respectively opened in the circumferential direction on the anchoring section; the prestressed tendons on the steel-concrete tower body pass through the first prestressed ducts and are anchored below the anchoring section; the second prestressed ducts are connected to the foundation ducts, and the directional prestressed tendons pass through the foundation ducts and second prestressed ducts and are anchored above the anchoring section.

3. The steel-concrete tower multi-pile prestressed cylinder composite foundation according to claim 2, characterized in that, The outer surface of the upper end of the anchoring section is shaped like a frustum, and the second prestressed duct has the same outline shape as the outer surface of the anchoring section.

4. The steel-concrete tower multi-pile prestressed cylinder composite foundation according to claim 1, characterized in that, Multiple support components are arranged in a circular array with the axis of the anchoring section as the center.

5. The steel-concrete tower multi-pile prestressed cylinder composite foundation according to claim 1, characterized in that, The support assembly includes a connecting diagonal rod and a pile body. One end of the connecting diagonal rod is installed on the cylindrical foundation, and the other end of the connecting diagonal rod is inclined downward and installed on the pile body. The pile body is buried underground.

6. The steel-concrete tower multi-pile prestressed cylinder composite foundation according to claim 5, characterized in that, The connecting diagonal bar has a connecting channel along its length, and the connecting channel is connected to the lower end of the foundation channel. After the steering prestressing tendon passes through the foundation channel and the connecting channel, it is anchored to the end of the connecting diagonal bar away from the cylindrical foundation.

7. The steel-concrete tower multi-pile prestressed cylinder composite foundation according to claim 5, characterized in that, A pile shoe is installed at the lower end of the pile.

8. The steel-concrete tower multi-pile prestressed cylinder composite foundation according to claim 7, characterized in that, A triangular cone is installed in the circumferential direction of the pile shoe.

9. The steel-concrete tower multi-pile prestressed cylinder composite foundation according to claim 7, characterized in that, The pile shoe has multiple ventilation holes in its circumferential direction.

10. A tower, characterized in that, include: The steel-concrete tower multi-pile prestressed cylinder composite foundation according to any one of claims 1-9.

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