Anti-scouring structure of offshore wind power pile foundation

Abstract

The invention discloses an anti-scouring structure of an offshore wind power pile foundation, and relates to the technical field of offshore wind power pile foundations. The device comprises steel plates, the steel plates define a barrel shape, fixing assemblies are symmetrically arranged on the two sides of the steel plates, the fixing assemblies are fixedly connected to the surface of a center column, the other sides of the fixing assemblies are fixedly connected to the surfaces of the steel plates, and connecting assemblies are arranged in the barrel-shaped structure defined by the steel plates. The two sides of the connecting assembly are fixedly connected with the sides, close to each other, of the center column and the side piles correspondingly, the inner supporting assembly is arranged in a cylindrical structure defined by the multiple steel plates, and the inner supporting assembly is fixedly connected with the surface of the center column. And the side piles and the steel plates are connected to form a closed annular space, and the center column is surrounded in the closed annular space, so that the center column is prevented from being scoured.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power pile foundations, and in particular to an anti-scouring structure of an offshore wind power pile foundation. Background Art

[0002] Relevant domestic and foreign specifications clearly stipulate that under normal circumstances, the total allowable rotation angle of the wind power foundation at the mud surface is 0.5°, of which the installation allowable error of the wind turbine is 0.25°, and the limit of permanent cumulative rotation at the mud surface is 0.25°. As the power of a single offshore wind turbine continues to increase, the wind load on the wind turbine structure also increases. Although the traditional single pile foundation performs well in vertical bearing capacity, it is insufficient in bending stiffness when facing natural environmental loads such as strong winds, waves or earthquakes, and is prone to large lateral displacement and horizontal rotation angle, affecting the stability of the wind turbine and even causing shutdown. In addition, the existence of a single pile foundation will disrupt the local water flow field, causing the water flow and eddy current to generate a large bed shear force, causing sediment loss, thereby forming local scouring. Local scouring will reduce the horizontal bearing capacity of the pile foundation and the natural frequency of the wind turbine structure, posing a threat to the structural stability of the offshore wind turbine and affecting the normal operation of the wind turbine. How to improve the bending stiffness of the foundation and solve the foundation scouring problem are the difficulties faced by the development of offshore wind turbines;

[0003] In recent years, pile-bucket foundation has been proposed as a solution, which improves the bearing capacity and stability by increasing the bottom area of ​​the foundation and the joint action of multiple piles. Although the pile-bucket foundation has improved in bending resistance, it is difficult to construct with negative pressure sinking, with high cost and long period, especially in complex marine geological environment, and the construction effect is often limited. In view of the insufficient bending stiffness and anti-scouring ability of single pile foundation, as well as the difficulty and high cost of pile-bucket foundation construction, the present invention proposes a novel multi-pile foundation structure. Compared with the traditional multi-pile foundation connected by horizontal rods, this solution aims to improve the overall stiffness and solve the foundation scouring problem through optimized design, thereby improving the stability, economy and efficiency of offshore wind power projects, so as to meet the needs of wider sea conditions. Therefore, we propose an anti-scouring structure for offshore wind power pile foundation. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an anti-scouring structure for offshore wind power pile foundation, comprising:

[0005] A central column, the central column is connected to the bottom of the wind turbine tower, and a plurality of side piles are arranged around the central column;

[0006] The enclosure mechanism is sleeved on the outside of the central column, and the central column and the side piles are fixedly connected through the enclosure mechanism;

[0007] Wherein, the enclosure mechanism comprises:

[0008] A steel plate, wherein the steel plate is arranged at the interval between two adjacent central columns, and a plurality of the steel plates are arranged, and the plurality of the steel plates form a cylindrical shape;

[0009] A fixing assembly, wherein the fixing assembly is symmetrically arranged on both sides of the steel plate, the fixing assembly is fixedly connected to the surface of the central column, and the side of the fixing assembly away from the central column is fixedly connected to the surface of the steel plate;

[0010] A connecting assembly, wherein the connecting assembly is arranged inside a cylindrical structure surrounded by a plurality of steel plates, and two sides of the connecting assembly are respectively fixedly connected to the central column and the side piles close to each other;

[0011] An inner support assembly, the inner support assembly is arranged inside a cylindrical structure surrounded by a plurality of steel plates, and the inner support assembly is fixedly connected to the surface of the central column;

[0012] During construction, first fix the connection component on the surface of the central column, then insert the side piles into the seabed, then fix the other side of the connection component to the side piles, and then fix several side piles in turn, the fixing component is pre-fixed on the surface of the side piles, and several steel plates are inserted into the intervals between adjacent side piles in turn, the steel plates are inserted into the seabed, and then the steel plates are fixed by the fixing component, and finally the inner support component is inserted into the cylindrical space surrounded by the several steel plates, and then the inner support component is started. The inner support component clamps the surface of the connection component, and the inner support component rests on the inner side of the steel plate. The bearing capacity and overall stability of the foundation are significantly improved by the collaborative bearing of multiple side piles and the stiffness is enhanced by the connection of steel plates. The side piles are connected to the steel plates to form a closed circular space, which surrounds the central column and prevents the central column from being scoured. Key components such as the central column, side piles, steel plates, fixing components, connection components, and inner support components are all prefabricated in the factory, and the installation process is more intuitive and convenient, which greatly reduces the construction difficulty and labor intensity and shortens the construction period.

[0013] Furthermore, the fixing components are provided with several groups, and the several groups of fixing components are evenly distributed along the circumference of the central column, each group of the fixing components is symmetrically arranged with the steel plate as the center, the connecting components are evenly distributed with several groups along the circumference of the central column, and each group of the connecting components is evenly distributed along the axial direction of the central column, several fixing components respectively fix the steel plates, and several groups of connecting components respectively fix several side piles on the surface of the central column.

[0014] Furthermore, the fixing assembly includes mounting holes, which are symmetrically opened on both sides of the steel plate, and mounting strips are fixedly connected to the surfaces of the side piles. Two mounting strips are symmetrically arranged with the steel plate as the center, and the sides of the two mounting strips close to each other are arranged to fit the curvature of the steel plate. A fixing bolt is arranged inside the mounting hole, and the fixing bolt is slidably connected to the inner side surface of the mounting hole, and the upper part of the steel plate is fixedly connected to the two mounting strips by the fixing bolts. The two mounting strips that fit the curvature of the steel plate can ensure the smooth sliding of the steel plate when the steel plate is inserted into the two mounting strips, avoid deformation of the steel plate, and ensure that a plurality of steel plates form a relatively regular cylindrical structure, thereby ensuring the enclosure effect.

[0015] Furthermore, the connecting assembly includes a horizontal rod, which is arranged at the interval between the central column and the side pile. Connecting flanges are provided at both ends of the horizontal rod, and the two connecting flanges are fixedly connected to the surface of the central column and the side pile on one side away from each other. The two connecting flanges are pre-welded to the surface of the central column and the side pile, which is more intuitive and convenient during construction.

[0016] Furthermore, connecting bolts are provided at both ends of the horizontal rod, and a number of the connecting bolts are evenly distributed along the circumference of the horizontal rod, and the two connecting flanges are fixedly installed at both ends of the horizontal rod by connecting bolts. The detachable installation method can easily replace damaged parts.

[0017] Furthermore, both ends of the horizontal rod are fixedly connected to limiting columns, and the ends of the two limiting columns that are away from each other extend into the inside of the two connecting flanges respectively, and the surfaces of the limiting columns are slidably connected to the inner sides of the connecting flanges. The limiting columns are inserted into the connecting flanges, and can limit the two before tightening the connecting bolts, thereby achieving a pre-positioning effect and avoiding the horizontal rod from tilting during construction. The embedded limiting columns can support the connecting flange and the horizontal rod after some of the connecting bolts fall off, avoiding the two from tilting and avoiding the breakage of the remaining connecting bolts.

[0018] Furthermore, the inner support assembly includes a top plate, two of which are symmetrically arranged on the top of the central column, and the two top plates are serrated on the sides close to each other, and the two top plates together constitute a ring plate structure, and the top plate is fixedly connected to a rod body on the side close to the steel plate, and the rod bodies are evenly distributed along the circumference of the two top plates, and the surface of the rod body is fixedly connected to a limit plate, and the limit plate is fixedly connected to a T-shaped plate on the side close to the steel plate, and the T-shaped plate is arranged to fit the curvature of the steel plate on the side away from the limit plate, and the two top plates are inserted in sequence, and the two top plates are meshed with each other. A ring-shaped plate structure is formed to close the cylindrical structure surrounded by several steel plates to prevent the entry of marine biological seedlings, thereby preventing barnacles and the like from attaching to the surface of the central column and causing damage to the central column. The T-shaped plate can support the inner side of the steel plate to prevent the steel plate from deforming under the scouring of seawater, thereby maintaining the stability of the cylindrical structure and preventing the steel plate from deforming, which may cause unnecessary vibration when seawater flows through. The two serrated top plates are more tightly engaged with each other to avoid offset, ensuring that the T-shaped plate can be stably supported on the inner side of the steel plate and ensuring the stability of the internal support effect.

[0019] Furthermore, a V-shaped rod is penetrated through the web of the T-shaped plate, and the surface of the V-shaped rod is fixedly connected to the inner side of the T-shaped plate, both ends of the V-shaped rod are fixedly connected to the side of the flange away from the steel plate, and a plurality of V-shaped rods are provided. The penetrated V-shaped rods can form a triangular structure on both sides of the T-shaped plate, ensuring that the flange of the T-shaped plate can withstand greater pressure when internally supported, thereby ensuring that the flange of the T-shaped plate will not be deformed, ensuring the supporting effect of the T-shaped plate on the curved surface of the steel plate.

[0020] Furthermore, clamping plates are symmetrically arranged on both sides of the horizontal rod, and the clamping plates are arranged at the interval between two adjacent limit plates. A telescopic rod is fixedly connected to one side of the two clamping plates away from each other, and the output end of the telescopic rod is fixedly connected to the clamping plate. The telescopic rod is embedded inside the clamping plate, and the surface of the telescopic rod is fixedly connected to the inner side surface of the clamping plate. The output end of the telescopic rod is fixedly connected to the inner side surface of the clamping plate. When the telescopic rod is started, the output end of the telescopic rod drives the clamping plate to move, and the two clamping plates clamp the horizontal rod to achieve fixation, and the inner support assembly and the connecting assembly are connected as a whole to jointly support the annular cylindrical structure surrounded by the steel plate to obtain a better anti-scour effect.

[0021] The present invention has the beneficial effects:

[0022] 1. The present invention significantly improves the bearing capacity and overall stability of the foundation by setting up a containment mechanism, and by means of multiple side piles cooperating in bearing and steel plate connection to enhance rigidity. The side piles are connected with the steel plates to form a closed annular space, which surrounds the central column and prevents the central column from being scoured. The key components such as the central column, side piles, steel plates, fixing components, connecting components, and internal support components are all prefabricated in the factory, making the installation process more intuitive and convenient, greatly reducing the construction difficulty and labor intensity, and shortening the construction period.

[0023] 2. The present invention sets a fixing component and two mounting strips that fit the curvature of the steel plate, so that when the steel plate is inserted into the two mounting strips, the steel plate can be ensured to slide in smoothly, thereby avoiding deformation of the steel plate and ensuring that several steel plates form a relatively regular cylindrical structure, thereby ensuring the enclosure effect.

[0024] 3. The present invention sets a connecting component, and the two connecting flanges are pre-welded on the surface of the center column and the side pile respectively. This makes the construction more intuitive and convenient. The detachable installation method can easily replace damaged parts. The limiting column is inserted into the connecting flange, and can limit the two before tightening the connecting bolts to achieve a pre-positioning effect, thereby avoiding the horizontal rod from tilting during construction. The embedding of the limiting column can support the connecting flange and the horizontal rod after some of the connecting bolts fall off, thereby avoiding the two from tilting and avoiding the breakage of the remaining connecting bolts.

[0025] 4. The present invention sets an internal support component, and the two top plates are meshed with each other to form a ring plate structure, which closes the cylindrical structure surrounded by several steel plates to prevent the entry of marine biological seedlings, thereby preventing barnacles and the like from attaching to the surface of the central column and damaging the central column. The T-shaped plate can support the inner side of the steel plate to avoid deformation of the steel plate under the scouring of seawater, thereby maintaining the stability of the cylindrical structure and preventing deformation of the steel plate, which may cause unnecessary vibration when seawater flows through. The two top plates meshed in a serrated manner are more tightly meshed with each other to avoid deviation, ensuring that the T-shaped plate can be stably supported on the inner side of the steel plate and the stability of the internal support effect. The V-shaped rods that are arranged through the T-shaped plate can form a triangular structure on both sides of the T-shaped plate, ensuring that the flanges of the T-shaped plate can withstand greater pressure during internal support, thereby ensuring that the flanges of the T-shaped plate will not be deformed and the supporting effect of the T-shaped plate on the curved surface of the steel plate is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the anti-scour structure of the offshore wind power pile foundation of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the enclosure mechanism of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the fixing assembly of the present invention;

[0029] Figure 4 For the present invention Figure 3 A magnified view of part A;

[0030] Figure 5 This is a schematic diagram of the structure of the connection assembly of the present invention;

[0031] Figure 6 It is a schematic diagram of the cross-sectional structure of the connection assembly of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the inner support assembly of the present invention;

[0033] Figure 8 It is a schematic diagram of the clamping plate structure of the present invention.

[0034] In the figure: 1. center column; 2. side piles; 3. enclosure mechanism; 31. steel plate; 32. fixing assembly; 321. mounting hole; 322. mounting strip; 323. fixing bolt; 33. connecting assembly; 331. horizontal rod; 332. connecting flange; 333. connecting bolt; 334. limiting column; 34. inner support assembly; 341. top plate; 342. rod body; 343. limiting plate; 344. T-shaped plate; 345. V-shaped rod; 346. telescopic rod; 347. clamping plate. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0036] Example 1, please refer to Figure 1-Figure 6 The present invention is an anti-scour structure for offshore wind power pile foundation, comprising:

[0037] A central column 1, which is connected to the bottom of the wind turbine tower, and a plurality of side piles 2 are arranged around the central column 1;

[0038] The enclosure mechanism 3 is sleeved on the outside of the central column 1, and the central column 1 is fixedly connected to the side pile 2 through the enclosure mechanism 3;

[0039] Among them, the enclosure mechanism 3 includes:

[0040] A steel plate 31, wherein the steel plate 31 is arranged at the interval between two adjacent central columns 1, and a plurality of steel plates 31 are arranged, and the plurality of steel plates 31 form a cylindrical shape;

[0041] The fixing components 32 are symmetrically arranged on both sides of the steel plate 31. The fixing components 32 are fixedly connected to the surface of the central column 1, and the side of the fixing components 32 away from the central column 1 is fixedly connected to the surface of the steel plate 31;

[0042] A connecting assembly 33, which is disposed inside the cylindrical structure surrounded by a plurality of steel plates 31, and two sides of the connecting assembly 33 are respectively fixedly connected to the central column 1 and the side pile 2 which are close to each other;

[0043] An inner support assembly 34, which is disposed inside the cylindrical structure surrounded by a plurality of steel plates 31, and is fixedly connected to the surface of the central column 1;

[0044] During construction, first fix the connection component 33 on the surface of the central column 1, then insert the side pile 2 into the seabed, then fix the other side of the connection component 33 to the side pile 2, and then fix several side piles 2 in sequence, fix the fixing component 32 in advance on the surface of the side pile 2, insert several steel plates 31 into the intervals between adjacent side piles 2 in sequence, insert the steel plates 31 into the seabed, then fix the steel plates 31 through the fixing component 32, and finally insert the inner support component 34 into the cylindrical space surrounded by several steel plates 31, then start the inner support component 34, and clamp the surface of the connection component 33. In addition, the inner support assembly 34 is against the inner side of the steel plate 31, and the bearing capacity and overall stability of the foundation are significantly improved by the collaborative load-bearing of multiple side piles 2 and the connection of the steel plate 31 to enhance the rigidity. The side piles 2 are connected to the steel plate 31 to form a closed circular space, which surrounds the central column 1 and prevents the central column 1 from being scoured. The key components such as the central column 1, side piles 2, steel plate 31, fixing assembly 32, connecting assembly 33, and inner support assembly 34 are all prefabricated in the factory, and the installation process is more intuitive and convenient, which greatly reduces the construction difficulty and labor intensity and shortens the construction period.

[0045] There are several groups of fixing components 32, and the several groups of fixing components 32 are evenly distributed along the circumference of the central column 1, and each group of fixing components 32 is symmetrically arranged with the steel plate 31 as the center. There are several groups of connecting components 33 evenly distributed along the circumference of the central column 1, and each group of connecting components 33 is evenly distributed along the axial direction of the central column 1. Several fixing components 32 fix the steel plate 31 respectively, and several groups of connecting components 33 fix several side piles 2 on the surface of the central column 1 respectively.

[0046] The fixing assembly 32 includes a mounting hole 321, which is symmetrically opened on both sides of the steel plate 31. A mounting strip 322 is fixedly connected to the surface of the edge pile 2. Two mounting strips 322 are symmetrically arranged with the steel plate 31 as the center, and the sides of the two mounting strips 322 close to each other are arranged to fit the curvature of the steel plate 31. A fixing bolt 323 is arranged inside the mounting hole 321, and the fixing bolt 323 is slidably connected to the inner side surface of the mounting hole 321, and the upper part of the steel plate 31 is fixedly connected to the two mounting strips 322 by the fixing bolt 323. The two mounting strips 322 that fit the curvature of the steel plate 31 can ensure the smooth sliding of the steel plate 31 when the steel plate 31 is inserted into the two mounting strips 322, avoid deformation of the steel plate 31, and ensure that a plurality of steel plates 31 form a relatively regular cylindrical structure, thereby ensuring the enclosure effect.

[0047] The connecting assembly 33 includes a horizontal rod 331, which is arranged at the interval between the central column 1 and the side pile 2. Connecting flanges 332 are arranged at both ends of the horizontal rod 331, and the two connecting flanges 332 are fixedly connected to the surfaces of the central column 1 and the side pile 2 on the sides away from each other. The two connecting flanges 332 are pre-welded to the surfaces of the central column 1 and the side pile 2, respectively, which is more intuitive and convenient during construction.

[0048] Connecting bolts 333 are provided at both ends of the horizontal rod 331, and a number of connecting bolts 333 are evenly distributed along the circumference of the horizontal rod 331, and two connecting flanges 332 are fixedly installed at both ends of the horizontal rod 331 by connecting bolts 333. The detachable installation method can easily replace damaged parts.

[0049] Both ends of the horizontal rod 331 are fixedly connected to the limiting columns 334, and the ends of the two limiting columns 334 away from each other extend into the inside of the two connecting flanges 332 respectively, and the surfaces of the limiting columns 334 are slidably connected to the inner sides of the connecting flanges 332. The limiting columns 334 are inserted into the connecting flanges 332, and can limit the two before tightening the connecting bolts 333, thereby achieving a pre-positioning effect and avoiding the horizontal rod 331 from tilting during construction. The embedding of the limiting columns 334 can support the connecting flanges 332 and the horizontal rod 331 after some of the connecting bolts 333 fall off, avoiding the two from tilting and avoiding the breakage of the remaining connecting bolts 333.

[0050] Example 2, please refer to Figure 1-Figure 8The inner support assembly 34 includes a top plate 341, and two top plates 341 are symmetrically arranged on the top of the central column 1, and the sides of the two top plates 341 close to each other are serrated, and the two top plates 341 together constitute a ring plate structure, and the side of the top plate 341 close to the steel plate 31 is fixedly connected to a rod body 342, and a plurality of rod bodies 342 are evenly distributed along the circumference of the two top plates 341, and the surface of the rod body 342 is fixedly connected to a limiting plate 343, and the side of the limiting plate 343 close to the steel plate 31 is fixedly connected to a T-shaped plate 344, and the side of the T-shaped plate 344 away from the limiting plate 343 is arranged to fit the arc of the steel plate 31, and the two top plates 341 are inserted in sequence, and the two top plates 342 are inserted in sequence. 41 mesh with each other to form an annular plate structure, which closes the cylindrical structure surrounded by several steel plates 31 to prevent the entry of marine biological seedlings, thereby preventing barnacles and the like from adhering to the surface of the central column 1 and damaging the central column 1. The T-shaped plate 344 can support the inner side of the steel plate 31 to prevent the steel plate 31 from being deformed under the scouring of seawater, thereby maintaining the stability of the cylindrical structure and preventing the steel plate 31 from being deformed, which may cause unnecessary vibration when seawater flows through. The two top plates 341 meshed in a serrated manner mesh more closely with each other to avoid deviation, thereby ensuring that the T-shaped plate 344 can be stably supported on the inner side of the steel plate 31 and ensuring the stability of the internal support effect.

[0051] A V-shaped rod 345 is arranged through the web of the T-shaped plate 344, and the surface of the V-shaped rod 345 is fixedly connected to the inner side surface of the T-shaped plate 344, and both ends of the V-shaped rod 345 are fixedly connected to the side of the flange away from the steel plate 31, and a plurality of V-shaped rods 345 are arranged. The V-shaped rods 345 arranged through the web can form a triangular structure on both sides of the T-shaped plate 344, ensuring that the flange of the T-shaped plate 344 can withstand greater pressure when supporting internally, thereby ensuring that the flange of the T-shaped plate 344 will not be deformed, ensuring the supporting effect of the T-shaped plate 344 on the curved surface of the steel plate 31.

[0052] Clamping plates 347 are symmetrically arranged on both sides of the horizontal rod 331. The clamping plates 347 are arranged at the interval between two adjacent limit plates 343. The two clamping plates 347 are fixedly connected with a telescopic rod 346 on the side away from each other. The output end of the telescopic rod 346 is fixedly connected to the clamping plate 347. The telescopic rod 346 is embedded in the clamping plate 347, and the surface of the telescopic rod 346 is fixedly connected to the inner side surface of the clamping plate 347. The output end of the telescopic rod 346 is fixedly connected to the inner side surface of the clamping plate 347. The telescopic rod 346 is started, and the output end of the telescopic rod 346 drives the clamping plate 347 to move. The two clamping plates 347 clamp the horizontal rod 331, thereby fixing it, connecting the inner support assembly 34 and the connecting assembly 33 into a whole, and jointly supporting the annular structure surrounded by the steel plate 31 to obtain a better anti-scouring effect.

[0053] During construction, two connecting flanges 332 are pre-welded on the surface of the center column 1 and the side pile 2 respectively, and then the horizontal rod 331 is fixed to the center column 1 by connecting bolts 333, and then the side pile 2 is inserted into the seabed, and the side pile 2 is fixed to the horizontal rod 331 by bolts, and several side piles 2 are fixed by horizontal rods 331 in turn, and several steel plates 31 are inserted into the intervals between adjacent side piles 2 in turn, and the steel plate 31 is inserted into the seabed. The steel plate 31 passes through two mounting strips 322 and is then fixed by fixing bolts 323. Several steel plates 31 are fixed in turn, and the steel plates 31 are surrounded by a cylindrical structure, and then two top plates 341 are inserted in turn. The two top plates 341 are meshed with each other, and the T-shaped plate 344 supports the inner side of the steel plate 31, and the telescopic rod 346 is started. The output end of the telescopic rod 346 drives the clamping plate 347 to move, and the two clamping plates 347 clamp the horizontal rod 331 to achieve fixation, and the inner support assembly 34 and the connecting assembly 33 are connected as a whole.

[0054] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. An anti-scour structure for offshore wind power pile foundation, characterized in that: include: A central column (1), the central column (1) being connected to the bottom of the wind turbine tower, and a plurality of side piles (2) being arranged around the central column (1); A blocking mechanism (3), wherein the blocking mechanism (3) is sleeved on the outside of the central column (1), and the central column (1) and the side pile (2) are fixedly connected via the blocking mechanism (3); Wherein, the enclosure mechanism (3) comprises: A steel plate (31), wherein the steel plate (31) is arranged at the interval between two adjacent central columns (1), and a plurality of the steel plates (31) are arranged, and the plurality of the steel plates (31) form a cylindrical shape; A fixing component (32), wherein the fixing component (32) is symmetrically arranged on both sides of the steel plate (31), the fixing component (32) is fixedly connected to the surface of the central column (1), and the side of the fixing component (32) away from the central column (1) is fixedly connected to the surface of the steel plate (31); A connecting assembly (33), wherein the connecting assembly (33) is arranged inside a cylindrical structure surrounded by a plurality of steel plates (31), and two sides of the connecting assembly (33) are respectively fixedly connected to the central column (1) and the side pile (2) close to each other; An internal support assembly (34) is arranged inside a cylindrical structure surrounded by a plurality of steel plates (31), and the internal support assembly (34) is fixedly connected to the surface of the central column (1).

2. The anti-scour structure of an offshore wind power pile foundation according to claim 1, characterized in that: The fixing components (32) are provided in a plurality of groups, and the plurality of groups of the fixing components (32) are evenly distributed along the circumference of the central column (1), and each group of the fixing components (32) is symmetrically arranged with the steel plate (31) as the center. The connecting components (33) are evenly distributed in a plurality of groups along the circumference of the central column (1), and each group of the connecting components (33) has a plurality of evenly distributed along the axial direction of the central column (1).

3. The anti-scour structure of an offshore wind power pile foundation according to claim 2, characterized in that: The fixing assembly (32) comprises a mounting hole (321), wherein the mounting holes (321) are symmetrically opened on both sides of the steel plate (31), a mounting strip (322) is fixedly connected to the surface of the edge pile (2), two mounting strips (322) are symmetrically arranged with the steel plate (31) as the center, and the two mounting strips (322) are arranged to fit the curvature of the steel plate (31) on the sides close to each other, a fixing bolt (323) is arranged inside the mounting hole (321), and the fixing bolt (323) is slidably connected to the inner side surface of the mounting hole (321), and the upper part of the steel plate (31) is fixedly connected to the two mounting strips (322) via the fixing bolt (323).

4. The anti-scour structure of an offshore wind power pile foundation according to claim 3, characterized in that: The connecting assembly (33) comprises a horizontal rod (331), wherein the horizontal rod (331) is arranged at the interval between the central column (1) and the side pile (2), and connecting flanges (332) are arranged at both ends of the horizontal rod (331), and the two connecting flanges (332) are fixedly connected to the surfaces of the central column (1) and the side pile (2) at the sides away from each other.

5. The anti-scour structure of an offshore wind power pile foundation according to claim 4, characterized in that: Both ends of the horizontal rod (331) are provided with connecting bolts (333), and a plurality of the connecting bolts (333) are evenly distributed along the circumference of the horizontal rod (331), and the two connecting flanges (332) are fixedly mounted on both ends of the horizontal rod (331) by the connecting bolts (333).

6. The anti-scour structure of an offshore wind power pile foundation according to claim 5, characterized in that: Both ends of the horizontal rod (331) are fixedly connected to the limiting columns (334), and the ends of the two limiting columns (334) that are away from each other extend into the inside of the two connecting flanges (332) respectively, and the surface of the limiting columns (334) is slidably connected to the inner side surface of the connecting flange (332).

7. The anti-scour structure of an offshore wind power pile foundation according to claim 6, characterized in that: The inner support assembly (34) comprises a top plate (341), wherein two top plates (341) are symmetrically arranged on the top of the central column (1), and the sides of the two top plates (341) close to each other are serrated, and the two top plates (341) together constitute an annular plate structure, and the side of the top plate (341) close to the steel plate (31) is fixedly connected to a rod body (342), and a plurality of rod bodies (342) are evenly distributed along the circumference of the two top plates (341), and the surface of the rod body (342) is fixedly connected to a limiting plate (343), and the side of the limiting plate (343) close to the steel plate (31) is fixedly connected to a T-shaped plate (344), and the side of the T-shaped plate (344) away from the limiting plate (343) is arranged to fit the arc of the steel plate (31).

8. The anti-scour structure of an offshore wind power pile foundation according to claim 7, characterized in that: A V-shaped rod (345) is provided through the web of the T-shaped plate (344), and the surface of the V-shaped rod (345) is fixedly connected to the inner side of the T-shaped plate (344), both ends of the V-shaped rod (345) are fixedly connected to the side of the flange away from the steel plate (31), and a plurality of V-shaped rods (345) are provided.

9. The anti-scour structure of an offshore wind power pile foundation according to claim 8, characterized in that: Clamping plates (347) are symmetrically arranged on both sides of the horizontal rod (331), and the clamping plates (347) are arranged at the interval between two adjacent limit plates (343). The two clamping plates (347) are fixedly connected with a telescopic rod (346) on one side away from each other, and the output end of the telescopic rod (346) is fixedly connected to the clamping plate (347). The telescopic rod (346) is embedded in the clamping plate (347), and the surface of the telescopic rod (346) is fixedly connected to the inner side surface of the clamping plate (347). The output end of the telescopic rod (346) is fixedly connected to the inner side surface of the clamping plate (347).

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