Anti-scouring stabilizing device for single-pile foundation of offshore wind turbine

Abstract

The invention relates to the technical field of foundations or underground or underwater structures, in particular to an offshore wind turbine single pile foundation anti-scouring stabilizing device which comprises a single pile body, a buffering assembly and a stabilizing assembly, and the buffering assembly is arranged outside the single pile body in a sleeving mode; a settling hemisphere is arranged in the stabilizing assembly, the spherical surface of the settling hemisphere is located on one side of a seabed, the bottom of the buffering assembly is coaxially connected with the upper surface of the settling hemisphere, the bottom of the single pile body penetrates through the settling hemisphere and then is inserted into the seabed, and an adjusting disc is movably connected to the outer upper surface of the settling hemisphere. A plurality of drainage plates are evenly connected to the outer portion of the adjusting disc at intervals and inserted into the seabed. The problem that long-term stable supporting of the single pile body cannot be effectively guaranteed in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of foundations or underground or underwater structures, and in particular to an anti-scour stabilization device for a single pile foundation of an offshore wind turbine. Background Art

[0002] Scour is a potential problem for offshore wind turbine monopile foundations. The interaction between the foundation and waves and currents amplifies the stress applied to the seabed around the monopile, causing the scour holes to gradually increase, thereby reducing the bearing capacity of the foundation. The downtime and maintenance losses caused by scour at a single typhoon level have reached tens of millions of yuan per year, so it is very important to protect offshore wind turbine monopiles from scour. The name of the currently disclosed patent is a solidified pile structure for scour protection of offshore wind turbine foundations, and the Chinese patent application number is 202210455522.5. Due to seawater scour, scour pits will be generated at the contact point between the monopile and the seabed surface, and the scour pits will gradually increase during the continuous movement of seawater. This structure cannot effectively reduce the reduction effect of the increase in scour pits on the stability of the monopile, which accelerates the shortening of the life of the wind turbine monopile. Summary of the invention

[0003] The purpose of the present application is to provide an anti-scour stabilization device for a single pile foundation of an offshore wind turbine, which solves the problem in the prior art that it is impossible to effectively ensure the long-term stable support of the single pile body.

[0004] The technical solution of this application:

[0005] The present application provides an anti-scour stabilization device for a single pile foundation of an offshore wind turbine, comprising:

[0006] Monopile body;

[0007] A buffer component, the buffer component is sleeved outside the single pile body;

[0008] A stabilizing component is provided with a sedimentation hemisphere, the spherical surface of the sedimentation hemisphere is located on one side of the seabed, the bottom of the buffer component is coaxially connected to the upper surface of the sedimentation hemisphere, the bottom of the single pile body passes through the sedimentation hemisphere and is inserted into the seabed, an adjusting disk is movably connected to the outer upper surface of the sedimentation hemisphere, a plurality of drainage plates are evenly connected to the outside of the adjusting disk, and the drainage plates are inserted into the seabed.

[0009] In some embodiments, the buffer assembly includes a buffer cylinder and a protective cylinder, the buffer cylinder is sleeved outside the protective cylinder, the protective cylinder is sleeved outside the single pile body, a plurality of buffer hemispheres are evenly embedded on the buffer cylinder, a displacement sensor is provided inside the buffer hemisphere, and the displacement sensor is used to detect the movement state of seawater at the set position.

[0010] In some embodiments, the outer sleeve of the sedimentation hemisphere is connected to a deposition ball sleeve, the interior of the deposition ball sleeve is a sediment storage chamber, the deposition ball sleeve is hemispherical, and the deposition ball sleeve is located between the outer surface of the sedimentation hemisphere and the inner side of the guide plate.

[0011] In some embodiments, the deposition ball sleeve comprises an inner ball sleeve, an outer ball sleeve and a connecting ring connecting the inner ball sleeve and the outer ball sleeve, the inner ball sleeve, the outer ball sleeve and the connecting ring enclose the sediment storage cavity, the connecting ring is connected to the outer circle of the upper end of the sedimentation hemisphere, the adjusting disk is provided with an arc-shaped operating hole coaxial therewith, and the arc-shaped operating hole is arranged opposite to the connecting ring.

[0012] In some embodiments, the sediment storage chamber is filled with sediment blocks.

[0013] In some embodiments, the number of the deposition ball sleeves is multiple and they are concentrically sleeved outside the sedimentation hemisphere in sequence.

[0014] In some embodiments, the buffer cylinder is provided with a plurality of movable through holes, and the buffer hemispheres are connected to the movable through holes.

[0015] In some embodiments, the spherical surface of the buffer hemisphere is located on a side away from the single pile body, an elastic detection layer is attached to the inner side of the buffer tube, a plurality of pressure sensors are arranged in front of the elastic detection layer, and the pressure sensors are arranged opposite to the buffer hemisphere.

[0016] In some embodiments, a flow guide is connected to the top of the buffer cylinder, and the flow guide includes a flow guide tube, a reinforcing cylinder is coaxially connected to the flow guide tube, and the buffer cylinder is connected to the reinforcing cylinder, and a flow guide cavity is formed between the outer wall of the reinforcing cylinder and the inner wall of the flow guide tube.

[0017] In some embodiments, the outer wall of the diversion tube is provided with a plurality of diversion inlets and outlets, and the plurality of diversion inlets and outlets are all connected to the diversion cavity.

[0018] The technical solution of the present application has at least the following advantages and beneficial effects:

[0019] The present application provides an anti-scouring stabilization device for a single pile foundation of an offshore wind turbine, which comprises a single pile body, a buffer component and a stabilization component. The buffer component can decompose the scouring effect of seawater on the single pile body, weaken the scouring force of seawater, and continuously reduce the scouring force transmitted to the position where the single pile body contacts the seabed, thereby minimizing the speed at which the scouring pit increases as much as possible and ensuring the stability of the single pile body. The stabilization component can be used to support the bottom of the single pile body at the position where the seabed and seawater contact, thereby extending the time of its stable support, and at the same time, when the contact area between the single pile body and the seabed is reduced, the single pile body moves downward, thereby ensuring sufficient contact area between the single pile body and the seabed, thereby extending its service life, and solving the problem that the prior art cannot effectively ensure the long-term stable support of the single pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the stabilizing device of this application;

[0021] Figure 2 A cross-sectional view of the stabilizing device for this application;

[0022] Figure 3 This is a schematic diagram of the internal structure of the deflector in the stabilizing device of the present application;

[0023] Figure 4 This is a schematic diagram of the structure of the adjustment disk in the stabilizing device of this application.

[0024] In the figure: 100-buffer assembly; 101-buffer cylinder; 102-protection cylinder; 103-buffer hemisphere; 104-displacement sensor; 105-movable through hole; 106-elastic detection layer; 107-pressure sensor; 108-deflector; 109-deflection tube; 110-reinforcement cylinder; 111-deflection cavity; 112-deflection inlet and outlet; 113-deflection rod; 200-stabilization assembly; 201-sedimentation hemisphere; 202-adjusting disk; 203-drainage plate; 204-arc-shaped operating hole; 205-inner ball sleeve; 206-outer ball sleeve; 207-connecting ring; 208-sediment storage cavity; 209-sedimentation block; 210-mounting hole; 211-adjusting column; 300-single pile body. DETAILED DESCRIPTION

[0025] The following will be combined with the figures in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] Example 1

[0027] Please refer to Figure 1-Figure 4 The present application provides an anti-scour stabilization device for a single pile foundation of an offshore wind turbine, the device comprising a single pile body 300, a buffer assembly 100, and a stabilization assembly 200, wherein the buffer assembly 100 is sleeved outside the single pile body 300; a sedimentation hemisphere 201 is arranged inside the stabilization assembly 200, the spherical surface of the sedimentation hemisphere 201 is located on one side of the seabed, the bottom of the buffer assembly 100 is coaxially connected to the upper surface of the sedimentation hemisphere 201, the bottom of the single pile body 300 passes through the sedimentation hemisphere 201 and is inserted into the seabed, an adjustment disk 202 is movably connected to the outer upper surface of the sedimentation hemisphere 201, a plurality of guide plates 203 are evenly connected to the outside of the adjustment disk 202, and the guide plates 203 are inserted into the seabed.

[0028] It should be noted that during the scouring of the single pile body 300 by the seawater above, a certain force will be exerted on the single pile body 300, and the force will be transmitted downward along the single pile body 300 to the seabed position, resulting in the formation of a scouring pit. Under the continuous scouring of seawater, the scouring pit continues to grow, which reduces the contact area between the single pile body 300 and the seabed, and finally leads to a reduction in the stability of the single pile body 300. The present application provides a single pile body 300, a buffer component 100, and a stabilizing component 200. The buffer component 100 can decompose the scouring effect of seawater on the single pile body 300, weaken the scouring force of seawater, and continuously reduce the scouring force transmitted to the position where the single pile body 300 contacts the seabed, thereby minimizing the speed at which the scouring pit increases and ensuring the stability of the single pile body 300. The stabilizing component 200 can be provided to support the bottom of the single pile body 300 at the position where the seabed and seawater contact, thereby extending the time of its stable support, and at the same time, when the contact area between the single pile body 300 and the seabed is reduced, the single pile body 300 moves downward, so that there is sufficient contact area between the single pile body 300 and the seabed, thereby extending its service life, thereby solving the problem that the prior art cannot effectively ensure the long-term stable support of the single pile body 300.

[0029] In detail, the present embodiment is provided with a settling hemisphere 201, an adjusting plate 202, and a guide plate 203. When a scour pit is formed, the original sand and soil in the scour pit moves to both sides. The guide plate 203 provided can block the outward flow of the original sand and soil, reduce the distance of the original sand and soil from the original position, and thus effectively suppress the expansion speed of the scour pit. The position where the single pile body 300 contacts the seabed and the seawater at the same time is named the reinforcement section. The guide plate 203 provided can realize 360-degree multi-directional diversion and guidance of the seawater around the reinforcement section, effectively suppress or weaken the formation of surface vortices, main vortices, secondary vortices, and tail vortexes, and further effectively suppress the expansion speed of the scour pit. During the formation of the scour pit, the contact area between the single pile body 300 and the seabed will decrease, and the stability of the single pile body 300 will weaken. In this embodiment, the adjustment disk 202 is set, and the force is applied to the adjustment disk 202, so that the distance that the guide plate 203 extends into the seabed is increased, thereby ensuring that the single pile body 300 still maintains stability after the scour pit is formed. On the other hand, in this embodiment, the sedimentation hemisphere 201 is set, and a downward force is applied to the sedimentation hemisphere 201, so that the spherical surface of the lower end of the sedimentation hemisphere 201 is embedded in the seabed, so that when the contact area between the reinforced section of the single pile body 300 and the seabed is reduced, the contact area between the entire offshore wind turbine and the single pile body 300 and the seabed can still be guaranteed through the setting of the entire device, thereby achieving that even if a scour pit is formed, the offshore wind turbine can still maintain stability for a long time, thereby solving the problem that the prior art cannot effectively ensure the long-term stable support of the single pile body 300.

[0030] Example 2

[0031] Please refer to Figure 1-Figure 4 On the basis of Example 1, the buffer assembly 100 includes a buffer cylinder 101 and a protective cylinder 102, the buffer cylinder 101 is sleeved outside the protective cylinder 102, the protective cylinder 102 is sleeved outside the single pile body 300, and a plurality of buffer hemispheres 103 are evenly embedded on the buffer cylinder 101, and a displacement sensor 104 is provided inside the buffer hemisphere 103, and the displacement sensor 104 is used to detect the movement state of the seawater at the set position.

[0032] It should be noted that, in this embodiment, a buffer cylinder 101, a protective cylinder 102, a buffer hemisphere 103, and a displacement sensor 104 are provided. The protective cylinder 102 is connected to the outer surface of the single pile body 300 to provide primary protection thereto, and the buffer cylinder 101 is provided to provide secondary protection to the outer surface of the single pile body 300. The plurality of buffer hemispheres 103 can decompose the scouring effect of seawater. The spherical design can decompose the scouring force in more directions to achieve the maximum decomposition effect. On the other hand, offshore wind turbines require regular inspection and maintenance during use. Generally, offshore wind turbines need to be replaced every 25 years. Although the existing technology can achieve disassembly and installation, due to the very high manufacturing precision and high manufacturing cost of offshore wind turbines, it is impossible to accurately determine the key positions that need to be replaced and maintained, which greatly increases the replacement and maintenance costs of offshore wind turbines. This embodiment sets a displacement sensor 104 in the buffer hemisphere 103 to record the force of the seawater impacting the buffer hemisphere 103 at that position, and detects the movement state of the seawater at the position where the buffer hemisphere 103 is set by the displacement sensor. A displacement sensor 104 is set in each buffer hemisphere 103, which can The invention can detect the seawater movement in the radial direction of 360 degrees and the axial direction of the outer circle of the single pile body 300, so that maintenance and detection have a focus, and ensure timely repair and maintenance of damaged or damaged positions, and also make it possible to effectively provide a basis for manufacturing improvement according to the changes in the marine environment in the later stage, promote the improvement of the service life of the wind turbine, reduce the cost of wind turbine manufacturing and use, solve the problem of shortening the service life due to failure to timely repair the damaged position of the single pile body 300 in the prior art, solve the problem of being unable to effectively judge the easily damaged position of the single pile body 300 in the prior art, and solve the problem of being unable to effectively judge the movement law of seawater around the single pile body 300 in the prior art.

[0033] In some embodiments, the outer shell of the sedimentation hemisphere 201 is connected with a sedimentation ball sleeve, the interior of the sedimentation ball sleeve is a sediment storage chamber 208, the sedimentation ball sleeve is hemispherical, and the sedimentation ball sleeve is located between the outer surface of the sedimentation hemisphere 201 and the inner side of the guide plate 203. The sediment storage chamber 208 is filled with a sedimentation block 209. By providing a sedimentation ball sleeve and making it have a sediment storage chamber 208, and filling the sedimentation block 209 in the sedimentation storage chamber 208, when the scour pit is formed so that the contact area between the single pile body 300 and the seabed will be reduced, the sedimentation ball sleeve is opened to make the sedimentation block 209 in the sediment storage chamber 208 fall into the scour pit, so that the scour pit can be filled. On the other hand, since the sedimentation ball sleeve is located between the outer surface of the sedimentation hemisphere 201 and the inner side of the guide plate 203, the area where the sedimentation block 209 falls is the impact pit, and the outside is blocked by the guide plate 203, which can minimize the probability of the sedimentation block 209 moving to the outside of the guide plate 203. The support of the sedimentation block 209 to the reinforcement section area of ​​the single pile body 300 improves the stability and service life of the entire single pile body 300 and the supporting device.

[0034] In some embodiments, the sedimentation ball sleeve includes an inner ball sleeve 205, an outer ball sleeve 206, and a connecting ring 207 connecting the inner ball sleeve 205 and the outer ball sleeve 206. The inner ball sleeve 205, the outer ball sleeve 206, and the connecting ring 207 enclose the sediment storage chamber 208. The connecting ring 207 is connected to the outer circle of the upper end of the sedimentation hemisphere 201. The adjusting disk 202 is provided with an arc-shaped operating hole 204 coaxial therewith, and the arc-shaped operating hole 204 is arranged opposite to the connecting ring 207. In detail, the cutting device extends into the arc-shaped operating hole 204 and contacts the connecting ring 207. The cutting device is controlled to work so that it cuts the connecting ring 207. Under the gravity of the sedimentation block 209, the outer ball sleeve 206 is pulled downward to make the cutting opening of the connecting ring 207 larger. Finally, the sedimentation block 209 falls from the sediment storage chamber 208 into the scouring pit. At this time, if the sedimentation hemisphere 201 contacts the sedimentation block 209 dropped below it, the sedimentation hemisphere 201 does not need to be pressed down. If the sedimentation hemisphere 201 does not contact the sedimentation block 209 dropped below it, the sedimentation hemisphere 201 can be pressed down.

[0035] In some embodiments, the number of the deposition ball sleeves is multiple and they are sequentially and concentrically sleeved outside the sedimentation hemisphere 201. By providing multiple deposition ball sleeves, the mass of the entire stabilizing device can be increased, making its supporting effect on the monopile body 300 more stable, and the scouring pit can be filled immediately after it is formed and enlarged.

[0036] In some embodiments, the buffer cylinder 101 is provided with a plurality of movable through holes 105, and the buffer hemisphere 103 is connected in the movable through holes 105. The buffer hemisphere 103 is movably connected in the movable through holes 105, so that the displacement sensor 104 can monitor the movement change of the seawater.

[0037] In some embodiments, the spherical surface of the buffer hemisphere 103 is located on a side away from the monopile body 300, and an elastic detection layer 106 is attached to the inner side of the buffer tube 101. A plurality of pressure sensors 107 are arranged in front of the elastic detection layer 106, and the pressure sensors 107 are arranged opposite to the buffer hemisphere 103. Through the provided pressure sensor 107, a start threshold is set. When the scouring force of seawater on the monopile body 300 is too large, and the scouring force is still transmitted to the pressure sensor 107 after being decomposed by the buffer hemisphere 103, the pressure sensor 107 is triggered to record the movement of the seawater at that location and send it to the terminal, so that the staff can perform maintenance and record in time.

[0038] In some embodiments, a flow guide 108 is connected to the top of the buffer cylinder 101, and the flow guide 108 includes a flow guide tube 109, and a reinforcing tube 110 is coaxially connected to the flow guide tube 109. The buffer cylinder 101 is connected to the reinforcing tube 110, and a flow guide cavity 111 is formed between the outer wall of the reinforcing tube 110 and the inner wall of the flow guide tube 109. The outer wall of the flow guide tube 109 is provided with a plurality of flow guide inlets and outlets 112, and the plurality of flow guide inlets and outlets 112 are all connected to the flow guide cavity 111. The flow guide 108 is provided, and is connected to the buffer cylinder 101 through the provided reinforcing tube 110. It should be noted that a filler is added between the reinforcing tube 110 and the buffer cylinder 101 to ensure the tightness of the connection. A diversion cavity 111 is provided and a plurality of diversion inlets and outlets 112 are opened on its outer wall. An example of a working process is given. Three diversion inlets and outlets 112 are provided, namely the first inlet, the second inlet and the third inlet. When seawater scours the deflector 108, seawater enters from the first inlet, a part of the seawater has the same direction as the seawater at the second inlet and flows out from the third inlet together, and the other part of the seawater has a different direction from the seawater at the second inlet and returns from the first inlet. The plurality of diversion inlets and outlets 112 allow a part of the seawater to enter therein and a part of the seawater to be decomposed along the outer surface of the deflector 108. A part of the seawater entering therein is diverted and a part of the forces offset each other, which can effectively offset and decompose the scouring force of seawater, thereby effectively achieving the anti-scouring effect and extending the service life of the entire device and the wind turbine pile.

[0039] Example 3

[0040] Please refer to Figure 1-Figure 4On the basis of Example 2, the lower width of the guide plate 203 is smaller than the upper width, so that it is easy to insert into the seabed. The inner ball sleeve 205 and the outer ball sleeve 206 are both mesh-shaped, so that the sediment block 209 inside can be easily dropped.

[0041] In some embodiments, the pressure sensor 107 and the displacement sensor 104 are connected to the generator of the wind turbine through a transmission line, which is convenient for charging and long-term effective detection. On the other hand, when a sensor fails to work, it can be determined that the force of the seawater at that location is large, and then the device at that location and the single pile body 300 can be maintained or repaired.

[0042] In some embodiments, a plurality of guide rods 113 are disposed in the guide inlet and outlet 112 .

[0043] In some embodiments, please refer to Figure 4 A mounting hole 210 coaxial with the adjusting disk 202 is provided, and a buffer cylinder 101 and a single pile body 300 are connected in the mounting hole 210. An adjusting column 211 is connected to the bottom of the adjusting disk 202. A conditioning groove is provided on the upper surface of the sedimentation hemisphere 201. The adjusting column 211 is connected to the conditioning groove. A tensioner is provided at the bottom of the adjusting groove. The tensioner is used to pull the adjusting disk 202 downward to one side of the seabed, thereby increasing the depth of the guide plate 203 inserted into the seabed.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-scour stabilization device for a single pile foundation of an offshore wind turbine, characterized in that: include: A single pile body (300); A buffer component (100), wherein the buffer component (100) is sleeved outside the monopile body (300); A stabilizing component (200) is provided with a sedimentation hemisphere (201) in the stabilizing component (200), the spherical surface of the sedimentation hemisphere (201) is located on one side of the seabed, the bottom of the buffer component (100) is coaxially connected to the upper surface of the sedimentation hemisphere (201), the bottom of the monopile body (300) passes through the sedimentation hemisphere (201) and is inserted into the seabed, the upper surface of the sedimentation hemisphere (201) is movably connected to an adjusting disk (202), and a plurality of guide plates (203) are evenly spaced and connected outside the adjusting disk (202), and the guide plates (203) are inserted into the seabed.

2. The stabilizing device according to claim 1, characterized in that: The buffer assembly (100) comprises a buffer cylinder (101) and a protective cylinder (102); the buffer cylinder (101) is sleeved outside the protective cylinder (102); the protective cylinder (102) is sleeved outside the monopile body (300); a plurality of buffer hemispheres (103) are evenly spaced and embedded in the buffer cylinder (101); a displacement sensor (104) is provided inside the buffer hemisphere (103); and the displacement sensor (104) is used to detect the movement state of seawater at a set position.

3. The stabilizing device according to claim 2, characterized in that: The outer shell of the sedimentation hemisphere (201) is connected to a deposition ball sleeve, the interior of the deposition ball sleeve is a sediment storage chamber (208), the deposition ball sleeve is hemispherical, and the deposition ball sleeve is located between the outer surface of the sedimentation hemisphere (201) and the inner side of the guide plate (203).

4. The stabilizing device according to claim 3, characterized in that: The sedimentation ball sleeve comprises an inner ball sleeve (205), an outer ball sleeve (206) and a connecting ring (207) connecting the inner ball sleeve (205) and the outer ball sleeve (206); the inner ball sleeve (205), the outer ball sleeve (206) and the connecting ring (207) enclose the sediment storage chamber (208); the connecting ring (207) is connected to the outer circle of the upper end of the sedimentation hemisphere (201); the regulating disk (202) is provided with an arc-shaped operating hole (204) coaxial therewith; the arc-shaped operating hole (204) and the connecting ring (207) are arranged opposite to each other.

5. The stabilizing device according to claim 3, characterized in that: The sediment storage chamber (208) is filled with sediment blocks (209).

6. The stabilizing device according to claim 5, characterized in that: The number of the deposition ball sleeves is multiple and they are sequentially and concentrically sleeved outside the sedimentation hemisphere (201).

7. The stabilizing device according to claim 2, characterized in that: The buffer cylinder (101) is provided with a plurality of movable through holes (105), and the buffer hemisphere (103) is connected to the movable through holes (105).

8. The stabilizing device according to claim 7, characterized in that The spherical surface of the buffer hemisphere (103) is located at a side away from the single pile body (300), an elastic detection layer (106) is attached to the inner side of the buffer cylinder (101), a plurality of pressure sensors (107) are arranged in front of the elastic detection layer (106), and the pressure sensors (107) are arranged opposite to the buffer hemisphere (103).

9. The stabilizing device according to claim 8, characterized in that The top of the buffer cylinder (101) is connected to a flow guide (108), the flow guide (108) comprises a flow guide tube (109), a reinforcing cylinder (110) is coaxially connected inside the flow guide tube (109), the reinforcing cylinder (110) is connected inside the buffer cylinder (101), and a flow guide cavity (111) is formed between the outer wall of the reinforcing cylinder (110) and the inner wall of the flow guide tube (109).

10. The stabilizing device according to claim 9, characterized in that The outer wall of the flow guide tube (109) is provided with a plurality of flow guide inlets and outlets (112), and the plurality of flow guide inlets and outlets (112) are all in communication with the flow guide cavity (111).

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