CN114277832B - Offshore wind turbine pile foundation anti-scouring energy dissipation device and installation method thereof - Google Patents
Offshore wind turbine pile foundation anti-scouring energy dissipation device and installation method thereof Download PDFInfo
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- CN114277832B CN114277832B CN202210035217.0A CN202210035217A CN114277832B CN 114277832 B CN114277832 B CN 114277832B CN 202210035217 A CN202210035217 A CN 202210035217A CN 114277832 B CN114277832 B CN 114277832B
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Abstract
The invention discloses an anti-scouring energy dissipation device for an offshore wind turbine pile foundation, wherein the foundation of an offshore wind turbine is a single pile foundation or a pile group foundation, and the anti-scouring energy dissipation device is arranged around the pile foundation of the offshore wind turbine; the top of the anti-scouring energy dissipater is provided with a buoyancy assembly, the bottom of the anti-scouring energy dissipater is provided with a connecting assembly, and an anti-scouring energy dissipation net is connected between the buoyancy assembly at the top of the anti-scouring energy dissipater and the connecting assembly at the bottom of the anti-scouring energy dissipater; the invention can effectively achieve the functions of scour prevention and energy dissipation, and has low manufacturing cost and convenient installation; the structure is not in direct contact with the offshore wind turbine structure, so that the wave load borne by the structure can be better reduced; the installation process is simple, the structure cannot be damaged, the later maintenance cost is low, and manpower, material resources and time are saved; in addition, the invention can be further combined with the fields of marine ranches and the like, and the parallel development of multiple industries and high quality is realized.
Description
Technical Field
The invention relates to the technical field of offshore wind power engineering, in particular to an anti-scouring energy dissipation device for an offshore wind turbine pile foundation and an installation method thereof.
Background
With the rapid development of offshore wind power generation industry in China, the problem of washing of the wind turbine foundation is increasingly serious. The main reason that the offshore wind turbine foundation is washed is that the offshore wind turbine foundation is washed by ocean currents for a long time, and the streaming flow is generated around the foundation, so that soil on the surface of a seabed near the foundation is greatly lost, and the foundation structure is exposed. This results in a reduction of the load-bearing capacity of the foundation and its stability. On the other hand, relevant researches show that the inherent frequency and the soil body properties around the pile of the offshore wind turbine can be further changed remarkably under the action of long-term cyclic horizontal loads, such as wind loads, wave loads and the like.
At present, the offshore wind turbine scour prevention in China mainly uses riprap, sand bags and the like. However, the riprap often inevitably moves due to the hydraulic action, and needs regular observation and maintenance. The sand bag is damaged due to the environmental effect or the construction process, and the working performance of the sand bag is affected. Therefore, it is particularly important to install a reasonable anti-scour arrangement and to reduce the impact of wave loads on offshore wind turbines.
Disclosure of Invention
The invention aims to provide an anti-scouring energy dissipation device for an offshore wind turbine pile foundation and an installation method thereof, which are used for solving the problems in the prior art, reducing the flow velocity of ocean currents, reducing the scouring of the foundation of the offshore wind turbine and effectively reducing the impact of wave currents on an underwater structure.
In order to achieve the purpose, the invention provides the following scheme: the invention provides an anti-scouring energy dissipation device for a pile foundation of an offshore wind turbine, which comprises the offshore wind turbine and the anti-scouring energy dissipation device, wherein the foundation of the offshore wind turbine is the pile foundation, and the anti-scouring energy dissipation device is arranged around the pile foundation of the offshore wind turbine; the top of the anti-scour energy dissipater is provided with a buoyancy assembly, the bottom of the anti-scour energy dissipater is provided with a connecting assembly, and an anti-scour energy dissipation net is connected between the buoyancy assembly at the top of the anti-scour energy dissipater and the connecting assembly at the bottom of the anti-scour energy dissipater.
Preferably, the anti-scouring energy dissipation device comprises two groups of anti-scouring energy dissipation nets, and the two groups of anti-scouring energy dissipation nets are respectively positioned on the inner side and the outer side of the buoyancy assembly; a plurality of groups of energy dissipation balls are arranged on the two groups of anti-scouring energy dissipation nets; the energy dissipation ball is rotationally connected with the anti-scour energy dissipation net.
Preferably, the buoyancy assembly comprises buoyancy circular rings, the anti-scouring energy dissipation net positioned on the inner sides of the buoyancy circular rings is an inner-layer anti-scouring energy dissipation net, and the inner side walls between the buoyancy circular rings are detachably connected with the inner-layer anti-scouring energy dissipation net; the anti-scouring energy dissipation net positioned on the outer side of the buoyancy ring is an outer anti-scouring energy dissipation net, and the outer side wall of the buoyancy ring is detachably connected with the outer anti-scouring energy dissipation net.
Preferably, the buoyancy ring comprises three identical groups of arc floating blocks, is connected through the connecting piece between every two adjacent groups of arc floating blocks, the buoyancy ring is whole to float on the surface of water, scour prevention net and energy dissipation net with the buoyancy ring bottom is connected through the hasp, the ring internal diameter is not less than 1 times foundation pile diameter, the external diameter of buoyancy ring is not more than 2 times foundation pile diameter.
Preferably, the energy dissipation balls are spherical, connecting holes are formed in the middle of the energy dissipation balls, and baffles are vertically and fixedly arranged on the circumferential direction of the energy dissipation balls; the diameter of the energy dissipation ball is 3-5 cm.
Preferably, the connecting assembly comprises an anchoring piece, the anchoring piece is fixedly connected with the bottom of the anti-scouring energy dissipation net, and the anti-scouring energy dissipation net is fixed in soil on the seabed through the anchoring piece.
Preferably, the inner layer anti-scouring energy dissipation net, the outer layer anti-scouring energy dissipation net and the buoyancy circular ring are connected with each other and then are in an umbrella-shaped and annular structure.
Preferably, the anti-scouring energy dissipation net is composed of three groups of completely same anti-scouring energy dissipation net sheets, and every two adjacent groups of anti-scouring energy dissipation net sheets are connected through the net ropes.
An installation method of an anti-scouring energy dissipation device of an offshore wind turbine pile foundation comprises the following steps:
a. the anti-scouring energy dissipation net surrounds the pile foundation; connecting adjacent inner-layer anti-scouring energy dissipation net sheets together by using a net rope, and connecting adjacent outer-layer anti-scouring energy dissipation net sheets together by using a net rope;
b. the upper part of the anti-scouring energy dissipation net is detachably connected with the buoyancy ring through a lock catch;
c. the lower part of the scour prevention energy dissipation net is fixedly connected in the seabed soil body through an anchoring piece.
The invention discloses the following technical effects:
(1) the invention can effectively achieve the functions of scour prevention and energy dissipation, and has low manufacturing cost and convenient installation;
(2) the invention does not directly contact with the offshore wind turbine structure, so that the wave load borne by the structure can be better reduced;
(3) the invention has simple installation process, no damage to the structure, lower later maintenance cost and labor, material and time saving.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of the offshore wind turbine structure and energy dissipater structure of the present invention;
FIG. 2 is a schematic view of the erosion-preventing energy-dissipating net of the present invention;
FIG. 3 is a schematic view of the energy dissipating ball of the present invention;
FIG. 4 is a schematic view of the structure of the erosion-preventing and energy-dissipating mesh and the arc-shaped floating block of the present invention;
FIG. 5 is a schematic diagram illustrating the positions of the artificial fish reef and the single pile foundation according to the present invention;
FIG. 6 is a schematic view illustrating an external structure of the artificial fish reef according to the present invention;
FIG. 7 is a schematic view illustrating an internal structure of the artificial fish reef according to the present invention;
wherein, 1, pile foundation; 2. a buoyant ring; 3. locking; 4. net ropes; 5. an anti-scouring energy dissipation net; 51. an outer anti-scouring energy dissipation net; 52. the inner layer is an anti-scouring energy dissipation net; 6. energy dissipation balls; 61. a baffle plate; 62. connecting holes; 7. a connecting portion; 8. mesh openings; 9. an anchoring member; 10. an offshore wind turbine; 11. single pile foundation; 12. an algae attachment base; 13. a fish culture tank; 14. a through hole; 15. a fixing plate; 16. a cabin is exposed; 17. a dark cabin; 18. a fish reef; 19. the seabed.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The first embodiment is as follows:
referring to fig. 1 to 4, the embodiment provides an anti-erosion energy dissipater for a pile foundation of an offshore wind turbine, which includes an offshore wind turbine 10 and the anti-erosion energy dissipater, where the foundation of the offshore wind turbine 10 is a pile foundation 1, and the anti-erosion energy dissipater is arranged around the pile foundation 1 of the offshore wind turbine 10; the top of the anti-scour energy dissipater is provided with a buoyancy assembly, the bottom of the anti-scour energy dissipater is provided with a connecting assembly, and an anti-scour energy dissipation net 5 is connected between the buoyancy assembly at the top of the anti-scour energy dissipater and the connecting assembly at the bottom of the anti-scour energy dissipater. When the ocean current passes through the anti-scouring energy dissipation net 5, the holes play a role in streaming, and the energy dissipation balls 6 attached to the net rotate under the action of the ocean current, so that the ocean current kinetic energy near the pile foundation 1 is reduced, and the wave force borne by the fan is reduced. The device is simple in installation process, does not directly contact with the pile foundation 1, and avoids the damage to the pile during construction and protection; in addition, the invention has the advantages of low cost of raw materials, short construction period, convenience for later maintenance, reduction of the anti-scouring cost of the fan and great reduction of the wave force on the single fan pile. In addition, the invention can be further combined with the fields of marine ranching and the like, and realizes the parallel development of multiple industries and high quality.
Single pile foundation: namely, the single steel pipe pile foundation is composed of a steel pipe pile with the diameter of 3-5m, and is suitable for a water area smaller than 25 m. The method of pile sinking can be used for hammering the soft soil foundation, the method of drilling can be used for the rock foundation, and large-diameter cast-in-situ bored piles can be formed in the rock foundation; the device is provided with an anti-scouring energy dissipation net around the single-pile foundation, and the bottom of the anti-scouring energy dissipation net is connected in the soil around the single-pile foundation through an anchoring part.
The anti-scouring energy dissipation device comprises two groups of anti-scouring energy dissipation nets 5, the two groups of anti-scouring energy dissipation nets 5 are respectively positioned at the inner side and the outer side of the buoyancy assembly, the anti-scouring energy dissipation nets 5 are composed of three groups of anti-scouring energy dissipation nets 5 which are completely identical, and every two adjacent groups of anti-scouring energy dissipation nets 5 are connected through net ropes 4; the two groups of anti-scouring energy dissipation nets 5 are provided with a plurality of groups of energy dissipation balls 6; the energy dissipation ball 6 is rotationally connected with the anti-scour energy dissipation net 5; the energy dissipation balls 6 are spherical, the middle parts of the energy dissipation balls 6 are provided with connecting holes 62, and baffles 61 are vertically and fixedly arranged on the circumferential direction of the energy dissipation balls 6; the contact surface of the anti-scour energy dissipation net 5 and the energy dissipation ball 6 is subjected to smoothing treatment, such as polishing, coating of lubricating materials and the like, the diameter of the energy dissipation ball 6 is about 3-5cm, and the direction of the baffle plate 61 is consistent with that of the connecting hole 62; the scour prevention energy dissipation net 5 is made of corrosion-resistant materials with a certain thickness, such as polypropylene, nylon and the like, and can be used in the sea for a long time, energy dissipation balls 6 made of PVC materials and capable of rotating along with ocean currents are attached to the scour prevention energy dissipation net 5, connecting holes in the middle of the energy dissipation balls 6 are rotatably connected with a net belt of the scour prevention energy dissipation net, a plurality of groups of net holes 8 are formed in the scour prevention energy dissipation net 5, four groups of energy dissipation balls are arranged around each net hole, and each four groups of energy dissipation balls are arranged around the periphery of the scour prevention energy dissipation net in a diagonal manner, so that a baffle is parallel to the net belt where the baffle is located, the energy dissipation net can be compressed and absorbed by energy when the scour prevention energy dissipation net is flushed by seawater, and the baffle is parallel to the net belt in real time, so that the baffle is also flushed by the water and is forced to rotate, further the scouring direction and unloading force of the seawater are changed, and the scour prevention and energy dissipation effects are improved; the mesh openings 8 of the anti-scouring energy-dissipating net 5 are about 5-10 cm; the connecting holes 62 of the energy dissipation balls 6 are arranged on the scour prevention energy dissipation net 5 in a penetrating mode, four energy dissipation balls 6 are arranged around each group of net holes 8 in a penetrating mode, the connecting portion 7 is arranged at the position where the energy dissipation balls 6 and the net belts are connected, the energy dissipation balls 6 and the net belts can rotate relatively, the scour prevention energy dissipation net 5 is buried in or attached to the seabed 19 around the pile foundation 1, the outer scour prevention energy dissipation net 5 is integrally umbrella-shaped in sea water due to the buoyancy effect, when silt passes through the scour prevention energy dissipation net 5 under the action of ocean current, the net holes 8 of the scour prevention energy dissipation net 5 play a role in turbulent flow, the energy dissipation balls 6 can rotate under the action of the ocean current, the kinetic energy of the water is converted into the kinetic energy dissipation balls 6, and therefore the scouring of the silt around the foundation is reduced, and the wave force borne by the underwater structure of the fan is reduced.
The buoyancy assembly comprises a buoyancy circular ring 2, an anti-scouring and energy dissipating net 5 positioned on the inner side of the buoyancy circular ring 2 is an inner-layer anti-scouring and energy dissipating net 52, the inner side wall of the buoyancy circular ring 2 is detachably connected with the inner-layer anti-scouring and energy dissipating net 52, and the inner-layer anti-scouring and energy dissipating net 52, the outer-layer anti-scouring and energy dissipating net 5 and the buoyancy circular ring 2 are connected with each other and then are in an umbrella-shaped and annular structure; the anti-scouring energy dissipation net 5 positioned outside the buoyancy ring 2 is an outer-layer anti-scouring energy dissipation net 51, and the outer side wall of the buoyancy ring 2 is detachably connected with the outer-layer anti-scouring energy dissipation net 5; the fan tower body 11 is positioned in the middle of the buoyancy ring 2. The buoyancy ring 2 is composed of three identical sets of arc-shaped floating blocks, every two adjacent sets of arc-shaped floating blocks are connected through a connecting piece (the connecting piece can adopt a bolt for longitudinal connection, firstly, two end parts of two adjacent arc-shaped floating blocks are both provided with a groove and a matched bulge for facilitating the insertion of the two, then the insertion part is fixedly connected through the bolt, or can also adopt a lock catch for connection, the lock catch between the two arc-shaped floating blocks is consistent with the lock catch principle of the connection between the buoyancy ring and the anti-scouring energy dissipation net, and different specifications can be selected according to actual requirements), the buoyancy ring 2 integrally floats on the water surface, the anti-scouring net and the energy dissipation net are connected with the bottom of the buoyancy ring 2 through the lock catch 3 (the lock catch adopted by the anti-scouring energy dissipation net in the device is an anti-scouring lock catch, the fixed part of the lock catch is fixedly arranged on the buoyancy ring, the movable part of the lock catch is positioned inside the anti-scouring energy dissipation net, when the two is connected, only need with the movable part of hasp and fixed part carry out the lock can, not only be convenient for install, still be convenient for disassemble to can also guarantee fixed intensity at the during operation), buoyancy ring 2 is hollow rubber circle, buoyancy ring 2 is the PVC material, and shock-absorbing material such as inboard adoption rubber layer or foam, and 5 basal areas of outer scour prevention dissipative net should be greater than buoyancy ring 2 and look down projection area. The inner diameter of the circular ring is not less than 1 time of the diameter of the foundation pile, and the outer diameter of the buoyancy circular ring 2 is not more than 2 times of the diameter of the foundation pile.
The connecting assembly comprises an anchoring piece 9, the anchoring piece 9 is fixedly connected with the bottom of the anti-scouring energy dissipation net 5, the anti-scouring energy dissipation net 5 is fixed in the soil body of the seabed 19 through the anchoring piece 9, and the anchoring piece 9 is an iron anchor (a sand bag or a stone block and the like).
An installation method of an anti-scouring energy dissipater of an offshore wind turbine 10 structure comprises the following steps:
a. the anti-scouring energy dissipation net 5 surrounds the pile foundation 1; connecting 52 pieces of the anti-scouring energy-dissipating net of the adjacent inner layer together by using the net head ropes 4, and connecting 5 pieces of the anti-scouring energy-dissipating net of the adjacent outer layer together by using the net head ropes 4;
b. the upper part of the anti-scouring energy dissipation net 5 is detachably connected with the buoyancy ring 2 through a lock catch 3;
c. the lower part of the scour prevention energy dissipation net 5 is fixedly connected in the soil body of the seabed 19 through an anchoring piece 9.
The working process is as follows: during installation, firstly placing the arc-shaped floating blocks on the sea surface around the pile foundation 1, and splicing three groups of identical arc-shaped floating blocks around the arc-shaped floating blocks to form a buoyancy ring 2; at the moment, the buoyancy ring 2 is sleeved around the single pile and is not in contact with the single pile, then the upper parts of the inner layer anti-scouring energy-dissipating net 52 pieces are connected with the bottom of the buoyancy ring 2 through the lock catches 3, and after the three anti-scouring energy-dissipating net 5 pieces are connected with the buoyancy ring 2, the two adjacent square anti-scouring energy-dissipating net 5 pieces are connected through the net ropes 4; when the three groups of inner-layer anti-scouring energy-dissipating net 52 sheets are connected into an integrated inner-layer anti-scouring energy-dissipating net by the net head 4, the lower part of the inner-layer anti-scouring energy-dissipating net 52 is fixed with the seabed 19 by the anchoring part 9; after the inner layer anti-erosion energy dissipation net 52 is connected, the outer layer anti-erosion energy dissipation net 5 is connected, the connection mode of the outer layer anti-erosion energy dissipation net 51 is consistent with that of the inner layer anti-erosion energy dissipation net 52, and the assembly is completed.
In actual work, the inner layer anti-scouring energy dissipation net 52 and the outer layer anti-scouring energy dissipation net 5 are supported by the net head ropes 4, so that the anti-scouring energy dissipation net 5 cannot be in contact with the pile foundation 1, and the buoyancy ring 2 floats on the sea surface to drive the anti-scouring energy dissipation net 5 to dissipate the scouring energy of sea waves; when the ocean current passes through the anti-scouring energy dissipation net 5, the holes and the balls on the load net can play the roles of streaming and energy dissipation, and the flow speed and direction of the ocean current around the pile body are changed, so that the anti-scouring purpose is achieved.
Example two: referring to fig. 5-7, the present embodiment differs from the first embodiment in that: in the embodiment, the fish reef 18 is fixedly mounted at the bottom of the pile foundation 1 and the seabed 19, the fixing plate 15 is arranged below the fish reef 18, the fish reef 18 is an artificial fish reef 18 and comprises an algae attachment base 12 and a fish culture box 13, the algae attachment base 12 is arc-shaped, the side projection of the algae attachment base 12 is in a shape of a trapezoid with equal arrival, a rough attachment surface made of coral fragments or steel slag is arranged on the algae attachment base 12, algae plants can be attached and grow conveniently by the rough attachment surface, the algae can slow down the erosion of water flow and the flying of soil on the seabed 19, and the effects of purifying and fixing soil are achieved; a fish culture box 13 is arranged below the algae attaching base 12 through a connecting rod, through holes 14 are formed in the front end and the rear end of the culture box, so that fishes can enter the culture box conveniently, and the through holes 14 are different in size and are suitable for different kinds of fishes to enter; and fish culture case 13 is inside to set up bright cabin and dark cabin, and bright cabin 16 is located the outside of box with through-hole 14 to direct and through-hole 14 intercommunication, and the dark cabin is located bright cabin 16's inside, and the light effect is less than bright cabin 16's light effect far away, so that be adapted to different kinds of fishes and perch the life, improve the attraction to the fish.
Because the fish reef 18 is arranged inside the two layers of erosion and erosion preventing energy dissipation nets 5, after the erosion and erosion preventing energy dissipation nets 5 dissipate energy of water flow from the outside, the water flow speed of the position close to the pile foundation 1 is low, the erosion effect on the pile foundation 1 is not obvious, and sand and soil inside the erosion and erosion preventing energy dissipation nets 5 can be sealed by placing the fish reef 18 around the position and culturing algae and fishes, so that loss of the sand and soil inside the erosion and erosion preventing energy dissipation nets 5 can be reduced under the action of algae; the algae can also play a role in buffering and purifying the water flow in the marine alga, so that the life of the fish can be ensured, the scour prevention effect can be achieved, and the organic combination of marine animal husbandry and marine wind power is realized; and due to the design of the anti-scouring net holes 8, the fish can freely enter the anti-scouring energy dissipation net 5 and the fish reef 18, and the influence on the life habits of different fishes is avoided.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (8)
1. The utility model provides an offshore wind turbine pile foundation scour prevention energy dissipater which characterized in that: the offshore wind turbine energy dissipation device comprises an offshore wind turbine (10) and an anti-scouring energy dissipation device, wherein the anti-scouring energy dissipation device comprises an anti-scouring energy dissipation net (5); the foundation of the offshore wind turbine (10) is a pile foundation (1), and the erosion-prevention energy dissipation device is arranged around the pile foundation (1) of the offshore wind turbine (10); the top of each anti-scouring energy dissipater is provided with a buoyancy assembly for supporting the anti-scouring energy dissipater, the bottom of each anti-scouring energy dissipater is provided with a connecting assembly for fixing the anti-scouring energy dissipater, and the anti-scouring energy dissipation net (5) is connected between the buoyancy assembly and the connecting assembly; the anti-scouring energy dissipation nets (5) are provided with two groups, the two groups of anti-scouring energy dissipation nets (5) are respectively positioned on the inner side and the outer side of the buoyancy assembly, and the two groups of anti-scouring energy dissipation nets are respectively an inner layer anti-scouring energy dissipation net (52) and an outer layer anti-scouring energy dissipation net (51); a plurality of groups of energy dissipation balls (6) are arranged on the two groups of anti-scouring energy dissipation nets (5); the energy dissipation ball (6) is rotationally connected with a mesh belt on the anti-scouring energy dissipation mesh (5); the energy dissipation balls (6) are spherical, connecting holes (62) are formed in the middle of the energy dissipation balls (6), and baffles (61) are vertically and fixedly arranged on the circumferential direction of the energy dissipation balls (6); the direction of the baffle (61) is consistent with that of the connecting hole (62), and the diameter of the energy dissipation ball (6) is 3-5 cm.
2. An anti-scouring energy dissipater for pile foundations of offshore wind turbines according to claim 1, characterized in that: the buoyancy assembly comprises a buoyancy circular ring (2), and the inner side wall of the buoyancy circular ring (2) is detachably connected with the inner-layer anti-scouring energy-dissipating net (52); the outer side wall of the buoyancy ring (2) is detachably connected with the outer layer anti-scouring energy dissipation net (51).
3. An anti-scouring energy dissipater for offshore wind turbine pile foundations according to claim 2, characterized in that: buoyancy ring (2) are floated the piece by the three groups arc of identical and are constituteed, connect through the connecting piece between every adjacent two sets of arc floating blocks, buoyancy ring (2) is whole to float on the surface of water, inlayer scour prevention can net (52) with outer scour prevention can net (51) all with buoyancy ring (2) bottom is connected through hasp (3), buoyancy ring (2) internal diameter is not less than 1 pile foundation (1) diameter doubly, the external diameter of buoyancy ring (2) is not more than 2 pile foundation (1) diameters.
4. An anti-scouring energy dissipater of offshore wind turbine pile foundations according to claim 3, characterized in that: the connecting assembly comprises an anchoring piece (9), the anchoring piece (9) is fixedly connected with the bottom of the anti-scouring energy dissipation net (5), and the anti-scouring energy dissipation net (5) is fixed in soil of a seabed (19) through the anchoring piece (9).
5. An anti-scouring energy dissipater for pile foundations of offshore wind turbines according to claim 4, characterized in that: the inner layer anti-scouring energy dissipation net (52), the outer layer anti-scouring energy dissipation net (51) and the buoyancy ring (2) are connected with each other and then are in an annular umbrella-shaped structure.
6. An anti-scouring energy dissipater of offshore wind turbine pile foundations according to claim 5, characterized in that: the inner layer anti-scouring energy dissipation net (52) and the outer layer anti-scouring energy dissipation net (51) are composed of three groups of anti-scouring energy dissipation net sheets which are completely the same, and every two adjacent groups of anti-scouring energy dissipation net sheets are connected through net ropes (4).
7. An anti-scouring energy dissipater for pile foundations of offshore wind turbines according to claim 1, characterized in that: the pile foundation (1) is any one of a single pile foundation (11) or a pile group foundation.
8. An installation method of an anti-scouring energy dissipation device for an offshore wind turbine pile foundation, which is based on the anti-scouring energy dissipation device for the offshore wind turbine pile foundation of claim 6, is characterized in that: the method comprises the following steps:
a. the anti-scouring energy dissipation net (5) surrounds the pile foundation (1); connecting the anti-scouring energy dissipation net sheets on the adjacent inner-layer anti-scouring energy dissipation nets (52) together by using a mesh line (4), and connecting the anti-scouring energy dissipation net sheets on the adjacent outer-layer anti-scouring energy dissipation nets (51) together by using the mesh line (4);
b. the upper part of the anti-scouring energy dissipation net (5) is detachably connected with the buoyancy ring (2) through a lock catch (3);
c. the lower part of the scour prevention and energy dissipation net (5) is fixedly connected in the soil body of the seabed (19) through an anchoring piece (9).
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| CN116240929A (en) * | 2023-04-18 | 2023-06-09 | 重庆大学 | Scour-resistant energy dissipation and ecological protection structure for offshore wind turbine single pile foundation |
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| CN216156660U (en) * | 2021-09-16 | 2022-04-01 | 盛东如东海上风力发电有限责任公司 | Offshore wind power anti-scouring device with energy dissipation net |
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| US8596919B2 (en) * | 2010-11-23 | 2013-12-03 | Technip France | Anti-scour disk and method |
| US10716296B2 (en) * | 2017-11-15 | 2020-07-21 | Graduate School At Shenzhen, Tsinghua University | Floating offshore wind turbine integrated with steel fish farming cage |
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| CN103215919A (en) * | 2013-04-27 | 2013-07-24 | 江苏科技大学 | Floating bulwark with flexible structure |
| CN109235239A (en) * | 2018-10-25 | 2019-01-18 | 浙江理工大学 | A kind of assembled bridge pier Anti-scouring device with protrudent sphere baffle |
| CN112942405A (en) * | 2021-02-04 | 2021-06-11 | 中国长江三峡集团有限公司 | Quickly-assembled and anti-scouring combined offshore wind power foundation and method |
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