Offshore wind power single pile foundation anti-scouring structure and mounting method thereof

Abstract

The invention relates to the technical field of offshore wind power foundation protection, in particular to an offshore wind power single pile foundation anti-scour structure and a mounting method thereof, and the offshore wind power single pile foundation anti-scour structure comprises a prefabricated grid; the multiple connected grids are arranged around the foundation pile in a surrounding mode. Artificial aquatic plants are uniformly arranged on each grid; a hanging ring is arranged on the grid and used for being connected with hoisting equipment during installation. Through organic combination of the prefabricated grids and the artificial aquatic plants, eco-friendly protection of the surrounding environment of the foundation pile is achieved, the installation process is optimized through the design of the hanging rings, and the advanced technology and design concept for guaranteeing long-term stable operation of wind power facilities in the complex marine environment are shown.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power foundation protection, and in particular to an offshore wind power single pile foundation anti-scour structure and an installation method thereof. Background Art

[0002] As the world pays more attention to environmental protection and sustainable energy utilization, wind power generation, as an important component of clean energy, is experiencing rapid development. In particular, offshore wind power generation has become a hot spot in the field of wind energy research and application in recent years because it does not occupy precious land resources, has abundant wind energy resources and has low noise characteristics during operation.

[0003] The efficient and stable operation of offshore wind turbines depends on a stable foundation structure. Monopile foundations have been widely used in offshore wind power projects due to their relatively simple structure, mature design and rich construction experience. However, monopile foundations are susceptible to long-term scouring by waves and currents in the seabed environment, resulting in the loss of sediment around the piles and the formation of scouring pits, which not only reduces the stability of the foundation, but also poses a potential threat to the safety of the overall structure.

[0004] In order to deal with the scouring problem of single pile foundation, the industry has tried a variety of anti-scouring measures, including throwing gravel around the piles to increase resistance, installing sleeves to isolate the direct impact of water flow, and filling solidified soil to enhance the foundation strength. Although these methods have alleviated the scouring problem to a certain extent, they are also accompanied by challenges such as complex construction technology, high cost, and possible adverse effects on the surface integrity of the piles. Summary of the invention

[0005] The purpose of the present invention is to provide an offshore wind power monopile foundation anti-scour structure and an installation method thereof in order to solve at least one of the above technical problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] An offshore wind power monopile foundation anti-scour structure, comprising: a prefabricated mesh grille;

[0008] A plurality of interconnected mesh grilles are arranged around the foundation piles;

[0009] Artificial water plants are evenly arranged on each of the mesh grilles;

[0010] The mesh grille is provided with a lifting ring, and the lifting ring is used to be connected with a lifting device during installation.

[0011] Further, the interconnected mesh grids form a circular layout or a square layout;

[0012] For a circular layout, the diameter of the circle is 4 to 5 times the diameter of the pile; for a square layout, the side length of the square is 4 to 5 times the diameter of the pile.

[0013] Further, the mesh grille comprises: a support frame and a mesh covering layer;

[0014] The grid covering layer is arranged on the surface of the supporting frame;

[0015] The artificial aquatic plants are tied at the intersections of the grid covering layers.

[0016] Furthermore, the support frame is made of angle steel or I-beam; the grid covering layer is a mesh structure made of steel wire or iron wire; the support frame is fixedly connected to the grid covering layer.

[0017] Furthermore, the mesh grille adjacent to the foundation pile is in an arc shape matching the foundation pile.

[0018] Furthermore, an annular fender is provided between the mesh grille and the foundation pile, and the annular fender is used to buffer the collision between the mesh grille and the foundation pile;

[0019] The annular fender is made of flexible material, and the diameter of the annular fender is greater than the diameter of the foundation pile.

[0020] Furthermore, the material of the artificial aquatic plants is plain carbon fiber.

[0021] Furthermore, the hanging rings are evenly and symmetrically arranged on the top of the mesh grille.

[0022] Furthermore, the grids are connected to each other by welding in advance in a factory, or by welding and assembling as required at a construction site.

[0023] A method for installing an offshore wind power monopile foundation anti-scour structure, used for installing any of the above offshore wind power monopile foundation anti-scour structures, the installation method comprising the following steps:

[0024] Fixedly connect multiple mesh grilles according to project needs;

[0025] Connect the lifting rings on the top of the mesh grille with a lifting device;

[0026] Align the foundation pile with the reserved gap in the middle of the mesh grille;

[0027] The mesh grill is lowered, and when the mesh grill contacts the water surface, the connection between the lifting device and the lifting ring is released.

[0028] The beneficial effects of the present invention are:

[0029] The present invention adopts a prefabricated mesh grille structure with plain carbon fiber artificial water grass, and realizes overall lifting through lifting rings; the structure is composed of a plurality of interconnected mesh grilles arranged around the foundation piles, the support frame of the mesh grille is sturdy and durable, the mesh covering layer is tightly woven, and the artificial water grass is evenly distributed, which enhances the ecological effect. In particular, the lifting rings are evenly and symmetrically arranged on the top of the mesh grille, which is convenient for the connection of lifting equipment and realizes fast and safe overall lifting. In addition, the annular fender arranged between the mesh grille and the foundation pile effectively buffers collisions and protects the foundation pile. During installation, the mesh grille is lowered to the reserved gap of the foundation pile, and the lifting is released when it touches the water surface. The construction is efficient and the anti-corrosion layer of the foundation pile is not damaged. The present invention is not only convenient to construct, but also effectively resists scouring, which is a major improvement in the protection of offshore wind power foundations. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A top view of an offshore wind power monopile foundation anti-scour structure according to an embodiment of the present invention;

[0031] Figure 2 A front view of an offshore wind power monopile foundation anti-scour structure according to an embodiment of the present invention;

[0032] Figure 3 A partial enlarged view of a mesh grid according to an embodiment of the present invention;

[0033] Figure 4 A flow chart of a method for installing an offshore wind power monopile foundation anti-scour structure according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the installation process of an offshore wind power monopile foundation anti-scour structure according to an embodiment of the present invention.

[0035] Among them, 1. mesh grille, 2. support frame, 3. mesh covering layer, 4. annular fender, 5. lifting ring, 6. artificial aquatic plant, 7. foundation pile. DETAILED DESCRIPTION

[0036] The content of the present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only to enable those skilled in the art to better understand and thus implement the content of the present invention, rather than implying any limitation on the scope of the present invention.

[0037] As used herein, the term “including” and variations thereof are to be interpreted as open-ended terms meaning “including, but not limited to.” The term “based on” is to be interpreted as “based, at least in part, on.” The terms “one embodiment” and “an embodiment” are to be interpreted as “at least one embodiment.”

[0038] Embodiment 1

[0039] Figure 1A top view of an offshore wind power monopile foundation anti-scour structure according to an embodiment of the present invention; Figure 2 This is a front view of an offshore wind power monopile foundation anti-scour structure according to an embodiment of the present invention. Figure 1-2 As shown, according to one embodiment of the present invention, an offshore wind power monopile foundation anti-scour structure comprises: a prefabricated mesh grille 1;

[0040] A plurality of interconnected mesh grilles 1 are arranged around the foundation piles 7;

[0041] Artificial water plants 6 are evenly arranged on each mesh grille 1;

[0042] The mesh grille 1 is provided with a lifting ring 5, which is used to be connected to a lifting device during installation.

[0043] Preferably, the hanging rings 5 ​​are evenly and symmetrically arranged on the top of the grille 1 .

[0044] In this embodiment, an offshore wind power monopile foundation anti-scour structure is proposed, which integrates the concepts of engineering design and ecological protection, and is intended to effectively resist the scouring effect of waves and currents in the marine environment and protect the stability of offshore wind power piles. Specifically, the core component of this anti-scour structure is a prefabricated mesh grille 1, which is not only structurally strong, but also exquisitely designed. It can be connected to each other and arranged around the offshore wind power pile 7 to form an all-round protective barrier. Multiple mesh grilles 1 are connected to each other to form a whole, and their overall planar shape is symmetrical and circular or positive.

[0045] The mesh grille 1 is corrosion-resistant, and artificial aquatic plants 6 are evenly arranged on each mesh grille 1. These artificial aquatic plants 6 not only simulate the functions of aquatic plants in the natural environment, but also effectively mitigate the direct impact of waves and currents on the seabed through their flexible characteristics and interaction with water flow, thereby reducing the loss of sediment around the foundation piles 7 and enhancing the stability of the foundation.

[0046] Furthermore, in order to improve installation efficiency and ensure safety, lifting rings 5 ​​are evenly and symmetrically arranged on the top of the mesh grille 1. These lifting rings 5 ​​serve as key connection points for lifting operations, so that the entire anti-scour structure can be smoothly and accurately positioned around the foundation piles 7 during installation, greatly simplifying the construction process and ensuring the safety of the operators. Through the stable connection between the lifting equipment and the lifting rings 5, the mesh grille 1 can be efficiently lifted into place, thereby quickly building a comprehensive protection system for the foundation piles 7.

[0047] The offshore wind power single pile foundation anti-scour structure of the present invention, through the organic combination of prefabricated mesh grilles and artificial aquatic plants, not only achieves eco-friendly protection of the environment around the foundation piles, but also optimizes the installation process through the lifting ring design, demonstrating the advanced technology and design concept for ensuring the long-term stable operation of wind power facilities in complex marine environments.

[0048] According to one embodiment of the present invention, the interconnected mesh grids 1 form a circular layout or a square layout;

[0049] For a circular layout, the diameter of the circle is 4 to 5 times the diameter of the pile 7 ; for a square layout, the side length of the square is 4 to 5 times the diameter of the pile 7 .

[0050] In this embodiment, the interconnected grids 1 can flexibly form a circular or square layout. For the circular layout, its diameter is carefully set to 4 to 5 times the diameter of the foundation pile 7 to ensure that a wide and uniform protection circle is formed around the foundation pile 7 to effectively disperse the impact of waves and currents. For the square layout, its side length is also set to 4 to 5 times the diameter of the foundation pile, aiming to provide a stable protection structure through regular geometric shapes, which can also effectively resist the scouring effect of the marine environment. The selection of these two layouts is not only based on its significant improvement in protection effectiveness, but also takes into account the optimization of construction convenience and material utilization. Multiple grids 1 are interconnected to form a whole, which enhances the stability and durability of the structure, ensures the long-term safe operation of offshore wind power facilities in complex marine environments, and fully considers economy and practicality while ensuring the protection effect, providing an efficient and reliable solution for offshore wind power foundation protection.

[0051] The interconnected mesh grids of the present invention can be flexibly formed into a circular or square layout, and their size is carefully set to 4 to 5 times the diameter of the foundation pile, which effectively improves the protection efficiency, disperses the impact of waves and currents, and optimizes the construction convenience and material utilization.

[0052] According to one embodiment of the present invention, the mesh grille 1 comprises: a support frame 2 and a mesh covering layer 3;

[0053] The grid covering layer 3 is arranged on the surface of the supporting frame 2;

[0054] The artificial water grass 6 is tied at the intersection of the grid covering layer 3.

[0055] Preferably, the support frame 2 is made of angle steel or I-beam; the mesh covering layer 3 is a mesh structure made of steel wire or iron wire; the support frame 2 is fixedly connected to the mesh covering layer 3.

[0056] In this embodiment, the mesh grille 1 is mainly composed of a support frame 2 and a mesh covering layer 3. The support frame 2, as the skeleton of the mesh grille 1, is made of solid angle steel or I-beam, and is welded to form a tic-tac-toe or circular / arc layout (for example, when the support frame 2 is rectangular, the overall layout formed by its connection is a square layout; when the support frame 2 is arc-shaped, the overall layout formed by its connection is a circle), providing strong support for the entire structure. The mesh covering layer 3 is carefully woven into a mesh structure using steel wire or iron wire, tightly covering the surface of the support frame 2, and fixed to the support frame 2 by welding or perforation connection, ensuring the stability and durability of the structure.

[0057] Artificial water plants 6 are pre-tied at the intersections of the mesh cover layer 3 of the mesh grille 1, ensuring uniform distribution of the artificial water plants 6 and improving the efficiency of on-site construction. In addition, in order to improve stability, the lifting ring 5, which serves as a lifting point during lifting, is fixedly connected to the upper surface of the support frame 2 by welding.

[0058] The mesh grille of the present invention not only provides strong supporting force, but also enhances the ecological function of the structure through the pre-tied artificial aquatic plants. At the same time, the provided lifting rings improve the convenience of construction, and ensure the stability, durability and practicality of the mesh grille as a whole, providing an efficient and reliable solution for fields such as offshore wind power foundation protection.

[0059] Figure 3 FIG. 1 is a partial enlarged view of a mesh grid according to an embodiment of the present invention. Figure 3 As shown, according to one embodiment of the present invention, the grid 1 adjacent to the foundation pile 7 is in an arc shape matching the foundation pile 7 .

[0060] Preferably, an annular fender 4 is provided between the mesh grille 1 and the foundation pile 7, and the annular fender 4 is used to buffer the collision between the mesh grille 1 and the foundation pile 7;

[0061] The annular fender 4 is made of flexible material, and the diameter of the annular fender 4 is greater than the diameter of the foundation pile 7 .

[0062] In this embodiment, when the mesh grille 1 is adjacent to the pile 7, it presents an arc structure that perfectly matches the pile 7, thereby enhancing the fit and stability between the mesh grille 1 and the pile 7. An annular fender 4 is provided between the mesh grille 1 and the pile 7. The fender is made of a flexible material (such as rubber) and has a diameter slightly larger than the diameter of the pile 7, thereby ensuring that a proper gap is left between the two during installation (preferably, the gap is 0.1 times the diameter of the pile), thereby effectively buffering the potential collision between the mesh grille 1 and the pile 7 and protecting the pile 7 from damage.

[0063] During the installation process, the support frame 2 is designed to be circular around the foundation pile 7. This shape design is not only convenient for passing through the foundation pile 7 during hoisting, but also provides a solid foundation for the installation of the annular fender 4. The annular fender 4 is tightly wrapped around the periphery of the circular support frame 2, forming a solid protective barrier, further enhancing the protective effect of the mesh grille 1 on the foundation pile 7.

[0064] The mesh grille design of the present invention not only improves the fit and stability between the mesh grille and the piles through the application of arc structure, annular fenders and flexible materials, but also effectively buffers potential collisions, providing an efficient and reliable solution for offshore wind power foundation protection.

[0065] According to one embodiment of the present invention, the artificial water grass 6 is made of plain carbon fiber.

[0066] Preferably, the grids 1 are connected to each other by welding in advance in a factory, or by welding and assembling as required at a construction site.

[0067] In this embodiment, the artificial water grass 6 is made of plain carbon fiber, which not only enhances the ecological function, but also ensures its durability and corrosion resistance. Multiple grids 1 are connected to each other by welding in advance in the factory or welding and assembling as needed at the construction site to form an integral structure. In view of the complex and changeable offshore construction environment, this design strategy ensures both construction efficiency and the stability and reliability of the grid system.

[0068] The present invention not only improves the construction efficiency, but also ensures the overall stability and reliability of the grid system, providing an efficient, reliable and eco-friendly comprehensive solution for fields such as offshore wind power foundation protection.

[0069] Embodiment 2

[0070] like Figure 1-3 As shown, according to one embodiment of the present invention, an offshore wind power single pile foundation anti-scour structure includes: a support frame 2, a grid covering layer 3, an annular fender 4, a lifting ring 5, artificial aquatic plants 6 and foundation piles 7, and the support frame 2 and the grid covering layer 3 form a grid 1.

[0071] The support frame 2 is the main support and force-bearing structure of the mesh grille 1, and is made of common angle steel or I-beam; the mesh covering layer 3 in each grid welded by the support frame 2, and the nodes of the mesh covering layer 3 are used to tie the artificial water grass 6; the angle steel or I-beam has a low cost, and the mesh grille 1 composed of the support frame 2 and the iron mesh covering layer 3 is easy to process, and the welding and tying of the artificial water grass 6 can be completed in the factory. The material of the artificial water grass 6 is plain carbon fiber, which has good durability, light weight, and is easy to tie.

[0072] The support frame 2 around the pile 7 is made into a circle according to the form of the pile 7, which is convenient for alignment and installation during construction; the support frame 2 is wrapped by the annular fender 4, which plays a shock-absorbing and buffering role to avoid the anti-corrosion coating of the pile from falling off due to friction and collision between the mesh grille 1 and the pile 7 during installation. At the same time, in extreme marine environments, or when the mesh grille 1 moves due to waves and currents, the annular fender 4 is used to buffer the collision between the mesh grille 1 and the pile 7 and protect the pile 7; a gap is left between the pile 7 and the annular fender 4 to facilitate the alignment of the mesh grille 1 and the pile 7 during overall lifting.

[0073] The side length of the grid 1 is 4 to 5 times the diameter of the foundation pile 7 and is evenly distributed around the foundation pile 7, which can effectively reduce the scouring of the seabed around the foundation pile by waves and currents and avoid sediment loss; the lifting ring 5 is located on the load-bearing support frame 2 of the grid 1.

[0074] The offshore wind power single pile foundation anti-scour structure of the present invention effectively protects the foundation piles from scouring and collision through a mesh grid composed of a steel frame, wire mesh and artificial aquatic plants, combined with the shock-absorbing and buffering effect of the annular fender, while facilitating installation and alignment, with significant technical effects.

[0075] Compared with the existing anti-scouring measures, the present invention is hoisted as a whole during construction, and the construction is convenient; the annular fender structure ensures the integrity of the anti-corrosion layer on the surface of the foundation pile during construction; in addition, the artificial water grass made of plain carbon fiber can effectively slow down the scouring effect of waves and currents around the foundation pile.

[0076] Embodiment 3

[0077] Figure 4 A flow chart of a method for installing an offshore wind power monopile foundation anti-scour structure according to an embodiment of the present invention; Figure 5 The figure is a schematic diagram of the installation process of an offshore wind power monopile foundation anti-scour structure according to one embodiment of the present invention. Figure 4-5 As shown, according to one embodiment of the present invention, a method for installing an offshore wind power monopile foundation anti-scour structure is used to install the offshore wind power monopile foundation anti-scour structure of the present invention, and the installation method includes the following steps:

[0078] Step S102, fixing and connecting a plurality of mesh grids 1 according to engineering requirements;

[0079] Step S104, connecting the lifting ring 5 on the top of the mesh grille 1 by means of a lifting device;

[0080] Step S106, aligning the foundation pile 7 with the reserved gap in the middle of the grid 1;

[0081] Step S108, lower the mesh grille 1, and when the mesh grille 1 contacts the water surface, release the connection between the lifting device and the lifting ring 5.

[0082] In this embodiment, the production of the mesh grille 1 is completed in advance in the factory, including connecting the support frame 2, the mesh covering layer 3 and the artificial water grass 6. The corrosion resistance requirements of the support frame 2 and the mesh covering layer 3 need to be considered during the production process, and corrosion-resistant materials or corrosion-resistant coatings are used. After the foundation piles 7 are piled and before the upper tower and the wind turbine unit are installed, the anti-scour structure is installed. During installation, the lifting ring 5 is connected by the rope of the crane equipment, and the foundation pile 7 is aligned with the reserved gap in the middle of the mesh grille 1. When the mesh grille 1 contacts the water surface, the rope of the lifting ring 5 is untied at the same time. The mesh grille 1 sinks into the seabed under its own weight. During the sinking, the artificial water grass 6 and the grille 1 structure will produce greater water resistance, slowing down the sinking speed and improving the structural safety. The overall lifting method is convenient for construction and reduces the underwater construction costs caused by traditional anti-scour methods.

[0083] The present invention greatly reduces the underwater construction cost required by traditional anti-scour technology, and significantly improves the construction efficiency through overall lifting, providing an innovative and economical solution for offshore wind power foundation protection.

[0084] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the method described above can refer to the corresponding process in the aforementioned product embodiment, and will not be repeated here.

[0085] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0086] It should be understood that the size of the serial numbers of each step in the content of the invention and the embodiments of the present invention does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Claims

1. An offshore wind power monopile foundation anti-scour structure, characterized in that: include: Prefabricated mesh grille (1); A plurality of interconnected mesh grilles (1) are arranged around the foundation piles (7); Artificial water plants (6) are evenly arranged on each mesh grille (1); The mesh grille (1) is provided with a lifting ring (5), and the lifting ring (5) is used to be connected to a lifting device during installation.

2. The offshore wind power monopile foundation anti-scour structure according to claim 1, characterized in that: The interconnected mesh grids (1) form a circular layout or a square layout; For a circular layout, the diameter of the circle is 4 to 5 times the diameter of the foundation pile (7); for a square layout, the side length of the square is 4 to 5 times the diameter of the foundation pile (7).

3. The offshore wind power monopile foundation anti-scour structure according to claim 1, characterized in that: The mesh grille (1) comprises: a support frame (2) and a mesh covering layer (3); The grid covering layer (3) is arranged on the surface of the supporting frame (2); The artificial water grass (6) is tied at the intersection of the grid covering layer (3).

4. The offshore wind power monopile foundation anti-scour structure according to claim 3, characterized in that: The support frame (2) is made of angle steel or I-beam; the mesh covering layer (3) is a mesh structure made of steel wire or iron wire; the support frame (2) is fixedly connected to the mesh covering layer (3).

5. The offshore wind power monopile foundation anti-scour structure according to claim 1, characterized in that: The mesh grille (1) adjacent to the foundation pile (7) is in an arc shape matching the foundation pile (7).

6. The offshore wind power monopile foundation anti-scour structure according to claim 5, characterized in that: An annular fender (4) is provided between the mesh grille (1) and the foundation pile (7), and the annular fender (4) is used to buffer the collision between the mesh grille (1) and the foundation pile (7); The annular fender (4) is made of a flexible material, and the diameter of the annular fender (4) is greater than the diameter of the foundation pile (7).

7. The offshore wind power monopile foundation anti-scour structure according to claim 1, characterized in that: The material of the artificial water grass (6) is plain carbon fiber.

8. The offshore wind power monopile foundation anti-scour structure according to claim 1, characterized in that: The hanging rings (5) are evenly and symmetrically arranged on the top of the mesh grille (1).

9. The offshore wind power monopile foundation anti-scour structure according to claim 1, characterized in that: The mesh grilles (1) are connected to each other by welding in advance in a factory, or by welding and assembling as required at a construction site.

10. A method for installing an offshore wind power monopile foundation anti-scour structure, used for installing the offshore wind power monopile foundation anti-scour structure according to any one of claims 1 to 9, characterized in that: The installation method comprises the following steps: According to the engineering requirements, multiple mesh grilles (1) are fixedly connected; Connecting the lifting ring (5) at the top of the mesh grille (1) via a lifting device; Align the foundation pile (7) with the reserved gap in the middle of the mesh grille (1); The mesh grille (1) is lowered, and when the mesh grille (1) contacts the water surface, the connection between the lifting device and the lifting ring (5) is released.

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