Offshore wind power monopile foundation structure

Abstract

The utility model relates to offshore photovoltaic power generation technical field discloses a kind of offshore wind power single pile foundation structure, comprising: foundation component and sleeve cage component.The application is connected by setting connecting piece and corbel on single pile foundation, the column in sleeve cage component is connected with corbel, so that corbel plays a supporting role to sleeve cage component, and the clamping piece of connecting piece is set in the inside of ring beam in sleeve cage component, the clamping groove on clamping piece is matched with connecting piece and is clamped, the firm connection of sleeve cage component and single pile foundation is realized. Therefore, by setting clamping structure, the structure does not need to adopt wedge-shaped plug in traditional practice, and does not rely on the pre-tightening force of bolt structure, installation is more convenient, and connection reliability is higher.

Description

Technical Field

[0001] This utility model relates to the technical field of offshore photovoltaic power generation, specifically to an offshore wind power monopile foundation structure. Background Technology

[0002] With the rapid development of offshore photovoltaic power generation technology, large-diameter steel pipe pile foundations are widely used due to their simple structure and high bearing capacity. After the construction of a single pile is completed, a cage structure is usually installed on its exterior to integrate multiple functions such as ship collision protection, personnel boarding, cable protection, and working platform.

[0003] The commonly used construction method in the industry is as follows: multiple brackets are welded circumferentially to the outer wall of a single pile, a prefabricated cage is hoisted and fitted onto the brackets, and then steel wedges are manually driven into the circumferential gap between the cage and the pile to achieve radial constraint and torsional fixation of the cage. While this method meets the initial installation requirements to some extent, it has revealed many problems in long-term operation: the wedges rely on friction self-locking, and under long-term alternating loads, temperature cycles, and the influence of marine organisms, the clamping force gradually weakens, making them prone to loosening or even falling off; uneven driving depth will lead to local stress concentration, significantly increasing the stress risk to the pile and the cage; in addition, the superposition of roundness errors in cage manufacturing and pile driving often makes it difficult to accurately install the wedges, further weakening the structural reliability.

[0004] To address the aforementioned issues, existing technologies, such as the offshore photovoltaic integrated construction transformer platform structure proposed in Chinese patent application CN120592187A, employ a ring beam fastening device between the cage and the steel pipe pile. This device involves placing a steel wedge-shaped plug in the gap between the cage and the steel pipe pile, and then bolting it to the pile, attempting to improve installation accuracy and structural stability through mechanical connection. However, this solution still has limitations: firstly, the ring beam fastening device relies on bolt preload to maintain radial fixation, which is prone to loosening due to corrosion and vibration in the marine environment over long periods, requiring regular maintenance; secondly, the structure still retains some on-site welding and bolting operations, failing to fundamentally improve the difficulty and timeframe of offshore construction. Therefore, existing technologies have not fundamentally overcome the reliability bottlenecks caused by "wedge plug dependence" and "gap fit," making it difficult to achieve maintenance-free operation throughout the entire life cycle. Utility Model Content

[0005] The purpose of this invention is to provide a monopile foundation structure for offshore wind power to solve the problems in the background technology.

[0006] To achieve the above objectives, this application provides an offshore wind turbine monopile foundation structure, comprising: a foundation assembly and a cage assembly. The basic components include: a monopile foundation, multiple connectors, and multiple corbels. The monopile foundation is located at sea. The multiple connectors are spaced apart along the outer perimeter of the monopile foundation. The multiple corbels are spaced apart on the bottom outer perimeter of the monopile foundation, and the connectors are located above the corbels. The cage assembly includes: multiple columns, multiple ring beams, and multiple snap-fit ​​components. The multiple ring beams are arranged vertically at intervals and surround the monopile foundation. The multiple columns surround the monopile foundation and are fixedly connected to the ring beams. Each column is connected to a corbel. The ring beams include an outer ring and an inner ring. The outer ring is spaced outside the inner ring. The columns are located between the outer ring and the inner ring and are connected to the inner wall of the outer ring and the outer wall of the inner ring. There is a gap between the inner ring and the monopile foundation. The multiple snap-fit ​​components are respectively connected to the multiple inner rings. Both the connectors and the snap-fit ​​components are located within the gap. Each snap-fit ​​component has a slot that matches the cross-sectional shape of the connector. Each snap-fit ​​component is snapped into a connector.

[0007] As a preferred technical solution, the connector includes a connecting part and a protrusion. The connecting part is fixedly connected to the monopile foundation, the protrusion is connected to one side of the connecting part, the slot matches the cross-sectional shape of the protrusion, and the protrusion is correspondingly engaged with a snap-fit ​​component.

[0008] As a preferred technical solution, the connector is a steel bar.

[0009] As a preferred technical solution, the snap-fit ​​component includes a snap-fit ​​part and a fixing part, the fixing part is disposed on one side of the snap-fit ​​part, the fixing part is fixedly connected to the ring beam, and the snap-fit ​​part is provided with the snap-fit ​​groove.

[0010] As a preferred technical solution, the slot is a dovetail groove.

[0011] As a preferred technical solution, the plurality of connectors have different cross-sectional shapes, and the plurality of slots respectively correspond to and cooperate with one of the connectors.

[0012] As a preferred technical solution, the offshore wind power monopile foundation structure further includes: a pad, wherein multiple pads are provided, the pads are fixedly disposed on the bottom surface of the column, and the pads are connected to the top surface of one of the brackets.

[0013] As a preferred technical solution, the offshore wind power monopile foundation structure further includes: a rubber plate, wherein multiple rubber plates are provided, the rubber plates are correspondingly disposed at the bottom of a pad, and the rubber plates are correspondingly connected to the top surface of a bracket.

[0014] As a preferred technical solution, the connection between the snap-fit ​​component and the monopile foundation, and the connection between the connector and the inner ring, are both welded.

[0015] The offshore wind power monopile foundation structure provided by the above technical solution has the following advantages compared with existing technologies: By installing connectors and corbels on the monopile foundation, the columns in the cage assembly are connected to the corbels, allowing the corbels to support the cage assembly. A snap-fit ​​component is installed inside the ring beam of the cage assembly to engage with the connector. The snap-fit ​​component's groove engages with the connector, achieving a secure connection between the cage assembly and the monopile foundation. Therefore, this snap-fit ​​structure eliminates the need for wedge plugs used in traditional methods and does not rely on the pre-tightening force of bolted structures, making installation more convenient and the connection more reliable. Attached Figure Description

[0016] The present application will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are intended only to conceptually represent the composition or structure of the described objects and may contain exaggerated representations, and the drawings are not necessarily drawn to scale.

[0017] Figure 1 This is a top view of the offshore wind power monopile foundation structure of this utility model; Figure 2 This utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a partial schematic diagram of the offshore wind power monopile foundation structure of this utility model; The components include: 1. Foundation components; 11. Monopile foundation; 12. Connectors; 121. Protrusions; 122. Connections; 13. Corbels; 2. Cage components; 21. Columns; 22. Ring beams; 221. Outer ring; 222. Inner ring; 23. Snap-fit ​​components; 231. Snap-fit ​​parts; 2311. Snap-fit ​​grooves; 232. Fixing parts; 3. Pads; 4. Rubber sheets. Detailed Implementation

[0018] Preferred embodiments of this application will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary, and should not be construed as limiting the scope of protection of this application.

[0019] First, it should be noted that the directions such as top, bottom, upward, and downward mentioned in this article are defined relative to the directions in the various accompanying figures. They are relative concepts and therefore can change depending on their different positions and practical applications. Therefore, these or other directions should not be interpreted as restrictive terms.

[0020] It should be noted that the term "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude the plural.

[0021] Furthermore, it should be noted that any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the accompanying drawings, can still be combined among these technical features (or their equivalents) to obtain other embodiments of this application not directly mentioned herein.

[0022] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0023] Please see Figure 1 The present application provides a single-pile foundation 11 structure for offshore wind power, comprising: a foundation component 1 and a cage component 2. The basic component 1 includes: a monopile foundation 11, a plurality of connectors 12 and a plurality of corbels 13. The monopile foundation 11 is located at sea. The plurality of connectors 12 are spaced apart along the outer periphery of the monopile foundation 11. The plurality of corbels 13 are spaced apart on the bottom outer periphery of the monopile foundation 11, and the connectors 12 are located above the corbels 13. The cage assembly 2 includes: multiple columns 21, multiple ring beams 22, and multiple snap-fit ​​components 23. The multiple ring beams 22 are arranged vertically at intervals and around the monopile foundation 11. The multiple columns 21 are arranged around the monopile foundation 11, and the columns 21 are fixedly connected to the ring beams 22. Each column 21 is connected to a corbel 13. The ring beams 22 include: an outer ring 221 and an inner ring 222. The outer ring 221 is spaced outside the inner ring 222, and the columns 21 are located on the outer ring 221. The column 21 is connected to the inner wall of the outer ring 221 and the outer wall of the inner ring 222. There is a gap between the inner ring 222 and the single pile foundation 11. Multiple snap-fit ​​pieces 23 are respectively connected to multiple inner rings 222. The connector 12 and the snap-fit ​​pieces 23 are both located in the gap. The snap-fit ​​piece 23 has a slot 2311 that matches the cross-sectional shape of the connector 12. The snap-fit ​​piece 23 is snapped into one of the connectors 12.

[0024] In this embodiment, the connector 12 is disposed along the outer peripheral wall of the monopile foundation 11, and extends downward along the axial direction of the monopile foundation 11 to above the corbel 13. The slots 2311 on the multiple snap-fit ​​members 23 located on the same vertical line and disposed on the multiple inner rings 222 pass through one snap-fit ​​member 23 sequentially from top to bottom and snap into the connector 12. The connector 12 and the snap-fit ​​member 23 are disposed in the gap between the inner ring 222 and the monopile foundation 11. The length of the two after snapping together is slightly less than the width of the gap, to ensure that slight vibrations are allowed between the cage assembly 2 and the monopile foundation 11 after installation, and to facilitate the snapping of the connector 12 and the snap-fit ​​member 23. This embodiment enables rapid connection between the cage assembly 2 and the monopile foundation 11. During installation, simply align the slot 2311 on the snap-fit ​​component 23 with the corresponding connector 12 for quick installation. Furthermore, the connection between the cage assembly 2 and the monopile foundation 11 is stable, effectively limiting axial slippage or torsion of the cage assembly 2 under ship impact or wave action. Compared to traditional methods, this application offers better installation convenience and structural stability, effectively reducing the frequency of subsequent maintenance.

[0025] It is worth noting that the bracket 13 used in this embodiment is a fan-shaped box structure cut from thick steel plate, with longitudinal and transverse reinforcing ribs inside. Thick steel plate can withstand greater loads; using thick steel plate to make the bracket 13 allows it to bear a greater load, ensuring the overall structural strength. The additional reinforcing ribs inside the box structure further enhance the rigidity and load-bearing capacity of the bracket 13, preventing the main steel plate from bending or deforming due to excessive stress. This design ensures both the load-bearing capacity and stability of the bracket 13, while also being lighter and more economical than a solid thick steel plate structure.

[0026] Please see Figure 2In some embodiments, the connector 12 includes a connecting portion 122 and a protrusion 121. The connecting portion 122 is fixedly connected to the monopile foundation 11, and the protrusion 121 is connected to one side of the connecting portion 122. The slot 2311 matches the cross-sectional shape of the protrusion 121, and the protrusion 121 is correspondingly engaged with a snap-fit ​​member 23. The cross-sectional shape of the protrusion 121 precisely matches the slot 2311, which is equivalent to a "customized guide structure". During installation, the slot 2311 fits snugly into the protrusion 121, directly limiting the offset and torsion of the snap-fit ​​part 23, significantly reducing installation errors. In addition, the direct snap-fit ​​between the protrusion 121 and the snap-fit ​​part 23 forms a mechanical lock, which can quickly fix the snap-fit ​​part 23 and prevent it from loosening or falling off. Furthermore, the matching of the cross-sectional shape further restricts relative sliding, making the fixation between the protrusion 121 and the snap-fit ​​part 23 more reliable and stronger in shear and torsion resistance. Moreover, the entire connection process does not require complicated tools or additional fasteners. It is only necessary to align the slot 2311 on the snap-fit ​​part 23 with the protrusion 121 and snap it in to complete the initial fixation, which can significantly shorten the assembly time and reduce the installation difficulty.

[0027] In some embodiments, the connector 12 is a steel bar. Steel itself has high strength, good impact resistance, and toughness, which can match the load-bearing requirements of the monopile foundation 11 and prevent the connector 12 from deforming or breaking due to excessive stress. Furthermore, the steel bar is small in size and light in weight, and as a connector 12, it will not add excessive weight to the monopile foundation 11, thus avoiding affecting the load-bearing efficiency of the monopile foundation 11, while also facilitating transportation and installation. In addition, the steel bar is easy to cut, bend, and weld, and can be processed into different lengths and cross-sectional shapes according to actual needs, flexibly adapting to the structural design of the protrusion 121 and the connector 122, exhibiting strong versatility.

[0028] Please see Figure 2 In some embodiments, the snap-fit ​​component 23 includes a snap-fit ​​portion 231 and a fixing portion 232. The fixing portion 232 is located on one side of the snap-fit ​​portion 231 and is fixedly connected to the ring beam 22. The snap-fit ​​portion 231 has a snap-fit ​​groove 2311. The snap-fit ​​portion 231 is specifically responsible for creating the snap-fit ​​groove 2311 and engaging with the protrusion 121 of the connector 12. The fixing portion 232 is specifically responsible for the fixed connection with the ring beam 22. Each component performs its own function. This division of labor makes the force path clear. The load during snap-fit ​​is borne by the snap-fit ​​portion 231, and the stability during fixing is ensured by the fixing portion 232, avoiding uneven force distribution caused by a single structure performing multiple functions. Furthermore, the fixing part 232 is directly fixed to the ring beam 22, providing a stable installation base for the snap-fit ​​part 23 and preventing the snap-fit ​​part 23 from loosening itself. The snap-fit ​​part 231 is precisely engaged with the connector 12 through the slot 2311 to form a mechanical lock. The double protection makes the connection between the connector 12 and the ring beam 22 more reliable and less prone to separation or displacement.

[0029] To better achieve the engagement of the connector 12 with the slot 2311 and prevent the connector 12 from coming out of the slot 2311, in some embodiments, the slot 2311 is a dovetail groove. The cross-section of the dovetail groove is trapezoidal. After the connector 12 is engaged, the groove wall will exert lateral pressure and reverse constraint on the protrusion 121. This structure has good self-locking properties and can effectively resist the pulling force along the opening direction of the slot 2311, preventing the connector 12 from coming out of the slot 2311. This significantly improves the pull-out resistance and separation resistance of the connector 12 and the ring beam 22, and is superior to the anti-detachment effect of ordinary rectangular grooves.

[0030] In some embodiments, the plurality of connectors 12 have different cross-sectional shapes, and the plurality of slots 2311 respectively mate with one of the connectors 12. Connectors 12 with different cross-sectional shapes can only be matched with slots 2311 of the same shape. During installation, they can be quickly distinguished by shape, preventing the incorrect connector 12 from being assembled into the corresponding position and completely eliminating structural failures caused by installation confusion.

[0031] Please see Figure 3 In some embodiments, the offshore wind power monopile foundation 11 structure further includes: a pad 3, wherein multiple pads 3 are provided, the pads 3 are fixedly disposed on the bottom surface of the column 21, and the pads 3 are correspondingly connected to the top surface of one of the brackets 13. The pads 3 can fill the flatness deviation between the bottom surface of the column 21 and the top surface of the bracket 13, allowing the two to make surface contact, avoiding local suspension or uneven stress caused by uneven contact surfaces. It also evenly distributes the concentrated load transmitted by the column 21 to the top surface of the bracket 13, reducing local stress concentration and preventing deformation or cracking of the bottom of the column 21 or the top surface of the bracket 13 due to excessive stress.

[0032] Please see Figure 3 In some embodiments, the offshore wind turbine monopile foundation 11 structure further includes: a rubber plate 4, wherein multiple rubber plates 4 are provided, each rubber plate 4 is correspondingly disposed at the bottom of a pad 3, and each rubber plate 4 is correspondingly connected to the top surface of a bracket 13. Rubber has elastic deformation capability, which can absorb the vibration and impact load transmitted by the column 21, reduce the impact of vibration on the bracket 13 and the overall structure, and improve structural stability. Furthermore, the elasticity of the rubber plate 4 can further compensate for minor gaps or flatness deviations between the pad 3 and the top surface of the bracket 13, making the contact tighter, while avoiding wear caused by direct hard contact between metals.

[0033] In some embodiments, the snap-fit ​​member 23 is welded to the monopile foundation 11, and the connector 12 is welded to the inner ring 222. Welding allows the connector 12 and the monopile foundation 11 to form a continuous metal interface, without gaps or the risk of loosening. Its shear, torsion, and pull-out resistance far exceeds that of bolted connections, significantly improving the overall structural stability. Furthermore, welding eliminates the need for custom-made complex fasteners, effectively shortening the construction period.

[0034] The installation method of this utility model is as follows: Step 1: Weld the corbel 13 and connector 12 to the monopile foundation 11 on land to complete the fabrication of the cage assembly 2. Weld the snap-fit ​​23 to the inner ring 222 of the ring beam 22. The dimensions of the snap-fit ​​groove 2311 on the connector 12 and the improved snap-fit ​​23 are pre-matched to ensure a seamless snap-fit.

[0035] Step 2: Locate the installation point in the target sea area and install the monopile foundation 11.

[0036] Step 3: Hoist the cage assembly 2, adjust the position of the cage assembly 2 so that the slot 2311 on the snap-fit ​​part 23 corresponds to the connector 12, and when the hoisting reaches the target elevation, slowly lower the cage assembly 2 so that the slot 2311 passes through the connector 12 until the bottom of the column 21 is connected to the bracket 13.

[0037] This invention achieves the snap-fit ​​connection between the connector 12 and the snap-fit ​​member 23 by setting a connector 12 on the outer peripheral wall of the monopile foundation 11 and a snap-fit ​​member 23 on the inner ring 222, with a slot 2311 on the snap-fit ​​member 23 that matches the cross-sectional area of ​​the connector 12. This allows for quick connection between the cage assembly 2 and the monopile foundation 11, ensuring the overall structural stability and reducing the frequency of subsequent maintenance.

[0038] This specification discloses the present application with reference to the accompanying drawings and also enables those skilled in the art to implement the application, including making and using any device or system, employing suitable materials, and using any combination of methods. The scope of this application is defined by the claimed technical solution and includes other instances that would occur to those skilled in the art. Such other instances shall be considered to fall within the scope of protection defined by the claimed technical solution, provided that they include structural elements that are not different from the literal language of the claimed technical solution, or contain equivalent structural elements that are not substantially different from the literal language of the claimed technical solution.

Claims

1. A monopile foundation structure for offshore wind power, characterized in that, include: Basic components and cage components, The basic components include: a monopile foundation, multiple connectors, and multiple corbels. The monopile foundation is located at sea. The multiple connectors are spaced apart along the outer perimeter of the monopile foundation. The multiple corbels are spaced apart on the bottom outer perimeter of the monopile foundation, and the connectors are located above the corbels. The cage assembly includes: multiple columns, multiple ring beams, and multiple snap-fit ​​components. The multiple ring beams are arranged vertically at intervals and surround the monopile foundation. The multiple columns surround the monopile foundation and are fixedly connected to the ring beams. Each column is connected to a corbel. The ring beams include an outer ring and an inner ring. The outer ring is spaced outside the inner ring. The columns are located between the outer ring and the inner ring and are connected to the inner wall of the outer ring and the outer wall of the inner ring. There is a gap between the inner ring and the monopile foundation. The multiple snap-fit ​​components are respectively connected to the multiple inner rings. Both the connectors and the snap-fit ​​components are located within the gap. Each snap-fit ​​component has a slot that matches the cross-sectional shape of the connector. Each snap-fit ​​component is snapped into a connector.

2. The offshore wind power monopile foundation structure as described in claim 1, characterized in that, The connector includes a connecting part and a protrusion. The connecting part is fixedly connected to the monopile foundation. The protrusion is connected to one side of the connecting part. The slot matches the cross-sectional shape of the protrusion, and the protrusion is correspondingly engaged with a snap-fit ​​component.

3. The offshore wind power monopile foundation structure as described in claim 1, characterized in that, The connector is a steel bar.

4. The offshore wind power monopile foundation structure as described in claim 1, characterized in that, The snap-fit ​​component includes a snap-fit ​​part and a fixing part. The fixing part is located on one side of the snap-fit ​​part and is fixedly connected to the ring beam. The snap-fit ​​part has a snap-fit ​​groove.

5. The offshore wind turbine monopile foundation structure as described in claim 1, characterized in that, The slot is a dovetail groove.

6. The offshore wind turbine monopile foundation structure as described in claim 1, characterized in that, The plurality of connectors have different cross-sectional shapes, and the plurality of slots respectively correspond to and cooperate with one of the connectors.

7. The offshore wind power monopile foundation structure as described in claim 1, characterized in that, Also includes: A pad, wherein multiple pads are provided, the pads are fixedly disposed on the bottom surface of the column, and the pads are connected to the top surface of one of the brackets.

8. The offshore wind power monopile foundation structure as described in claim 7, characterized in that, Also includes: A rubber sheet is provided, wherein multiple rubber sheets are provided, and the rubber sheets are correspondingly disposed at the bottom of a pad and connected to the top surface of a bracket.

9. The offshore wind power monopile foundation structure as described in claim 1, characterized in that, The connection between the snap-fit ​​component and the monopile foundation, and the connection between the connector and the inner ring, are both welded.

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