Offshore pile foundation scour protection structure

Abstract

The present application relates to offshore pile foundation technical field, disclose a kind of offshore pile foundation scouring resistance structure, comprising: connecting piece, connecting piece is suitable for being connected with pile foundation main body;Deflector structure, the deflector structure one end is abutted with dam body, the other end is connected with connecting piece;Deflector structure has flow resistance surface and flow guide surface, flow resistance surface and vortex disturbance direction form angle to carry out the block to vortex around pile foundation main body, flow guide surface is connected with flow resistance surface to guide the fluid exported from flow resistance surface as downward flow.By flow resistance surface blocking vortex around pile foundation main body, cooperate flow guide surface and be blocked vortex is guided as downward ordered water flow, effectively reduce the vortex generation around pile foundation main body, significantly weaken vortex to the lateral impact of pile foundation pile body, while also can reduce vortex to the scouring of surrounding seabed.

Description

Technical Field

[0001] This invention relates to the field of marine pile foundation technology, and more specifically to a marine pile foundation anti-scour structure. Background Technology

[0002] With the increasing global demand for renewable energy, offshore photovoltaic (PV) power plants, as an emerging form of clean energy, are gradually becoming an important way to solve energy shortages and environmental problems. Offshore PV pile foundations are a crucial supporting structure for these power plants. However, due to the complex and variable marine environment, these foundations are subjected to long-term erosion by waves and currents, leading to erosion of the surrounding seabed soil and the formation of scour pits. This severely affects the stability and bearing capacity of the pile foundations, posing potential risks to the safe operation of offshore PV power plants. Currently, common anti-scour measures for offshore PV pile foundations have many shortcomings. For example, some traditional protective structures simply add obstructions around the pile foundations, which cannot effectively guide water flow and may even cause localized turbulence, exacerbating erosion. While some methods that utilize the inherent properties of materials to resist erosion, such as using corrosion-resistant materials for pile foundations, can delay pile damage to some extent, they do not fundamentally solve the problem of seabed erosion. Therefore, existing anti-scour structures are unable to effectively reduce eddies around the piles, nor can they effectively guide water flow while simultaneously reducing the erosion of the seabed by these eddies. Summary of the Invention

[0003] In view of this, the present invention provides a marine pile foundation anti-scour structure to solve the problem that traditional protective structures are unable to effectively reduce pile periphery eddies while guiding water flow to reduce scour of the seabed around the pile foundation.

[0004] This invention provides a marine pile foundation anti-scour structure, comprising: a connector adapted to be connected to the main body of the pile foundation; a guide plate structure, one end of which abuts against the dam body and the other end of which is connected to the connector; the guide plate structure has a flow-blocking surface and a flow-guiding surface, the flow-blocking surface forming an angle with the direction of eddy current disturbance to block the eddy current around the main body of the pile foundation, and the flow-guiding surface connecting with the flow-blocking surface to guide the fluid discharged from the flow-blocking surface as a downward water flow.

[0005] Beneficial effects: By blocking the eddies around the main body of the pile foundation through the flow-blocking surface, and guiding the blocked eddies into an orderly downward flow through the flow-guiding surface, the generation of eddies around the main body of the pile foundation is effectively reduced, the lateral impact of the eddies on the pile foundation is significantly weakened, and the scouring of the surrounding seabed by the eddies is also reduced.

[0006] In one optional embodiment, the guide plate structure includes: a guide support side frame, one end of which abuts against the dam body and the other end of which is connected to a connector; a flow-blocking surface is disposed on the guide support side frame; a lower support guide plate, which is disposed below the guide support side frame and includes a side plate and a bottom plate. The side plate of the lower support guide plate is connected to the guide support side frame, and the bottom plate of the lower support guide plate is disposed on and connected to the seabed; a guide surface is disposed on the lower support guide plate.

[0007] Beneficial effects: The flow-guiding support side frame is connected to the lower support flow-guiding plate, which can guide the eddies into a downward orderly flow, reduce eddy generation, weaken lateral impact, and reduce seabed erosion; the lower support flow-guiding plate is directly connected to the seabed, which enhances structural stability and further optimizes the water flow path.

[0008] In one optional embodiment, the side of the flow guide support frame away from the dam body is configured as a first curved surface, and the side plate of the lower support guide plate facing the wall of the dam body is configured as a second curved surface. The connection surface between the flow guide support frame and the lower support guide plate is an arc-shaped transition surface, and the flow guide support frame and the lower support guide plate form a double-curvature airfoil section.

[0009] Beneficial effects: The first curved surface of the flow guide support side frame achieves a smooth transition with the second curved surface of the lower support guide plate through the arc transition surface, eliminating any right angle or angular structure, thereby avoiding turbulence caused by structural abrupt changes; at the same time, the downward water flow is guided by the first and second curved surfaces, and its impact intensity is more gentle.

[0010] In one optional embodiment, the flow guide support side frame or the lower support flow guide plate has a cavity inside, and the cavity is filled with a honeycomb airfoil composite cavity structure; the honeycomb airfoil composite cavity structure in the flow guide support side frame is suitable for absorbing the impact force of water flow impacting the flow guide support side frame; the honeycomb airfoil composite cavity structure in the lower support flow guide plate is suitable for absorbing the impact force of water flow impacting the lower support flow guide plate.

[0011] Beneficial effects: The porous honeycomb structure of the honeycomb airfoil composite cavity structure can effectively disperse and absorb the kinetic energy of eddy current impact, and reduce the instantaneous impact stress of the guide support side frame or the lower support guide plate; at the same time, the porous honeycomb structure of the honeycomb airfoil composite cavity structure can reduce its self-weight while ensuring structural strength, and reduce the additional load on the pile foundation.

[0012] In one optional embodiment, the honeycomb airfoil composite cavity structure includes: a honeycomb interlayer, which is embedded in the cavity of the flow guide support side frame or the lower support flow guide plate; the honeycomb interlayer has a plurality of honeycomb cavities inside, and the honeycomb cavities are filled with a plurality of viscoelastic silicone microspheres.

[0013] Beneficial effects: Viscoelastic silicone microspheres further disperse the impact energy of eddies through their own elastic deformation; the honeycomb sandwich provides rigid support, ensuring the overall strength of the structure.

[0014] In one optional embodiment, a plurality of pile bottom flow collection and stabilizing hoods are provided on the bottom plate of the lower support guide plate. The pile bottom flow collection and stabilizing hoods are adapted to guide the water flow to converge at the bottom of the pile bottom flow collection and stabilizing hoods to form a compaction zone.

[0015] Beneficial effects: The compacted zone formed by the convergence of water flow guided by the pile bottom flow hood can effectively enhance the density of the seabed around the main body of the pile foundation, thereby enhancing the shear strength of the seabed and improving the bottom stability of the main body of the pile foundation.

[0016] In one optional embodiment, the pile bottom flow collecting and stabilizing cover includes: a pile bottom flow collecting and stabilizing cover, which is a conical structure with a through conical cavity inside; the pile bottom flow collecting and stabilizing cover penetrates the bottom of the lower supporting guide plate, and the outer surface of the pile bottom flow collecting and stabilizing cover is provided with guide patterns; a central flow collecting cylinder, which is disposed in the conical cavity of the pile bottom flow collecting and stabilizing cover; the central flow collecting cylinder is provided with a through flow collecting chamber, which is connected to the conical cavity of the pile bottom flow collecting and stabilizing cover.

[0017] Beneficial effects: The conical structure of the pile bottom flow collection and stabilization hood, combined with the flow guiding patterns on its outer surface, can guide the water flow to converge along a preset path, avoiding disorderly diffusion of the water flow on the surface of the pile bottom flow collection and stabilization hood; the central flow collection cylinder can concentrate and guide the dispersed water flow to the central area of ​​the seabed, avoiding large-scale scouring caused by the water flow spreading to the surrounding areas; at the same time, the flow collection chamber can buffer the water flow, reduce the water flow velocity, and further reduce the impact on the seabed.

[0018] In one optional embodiment, a buffer fitting structure is provided between the flow guide support side frame and the dam body, and the buffer fitting structure is connected to one end face of the flow guide support side frame facing the dam body.

[0019] Beneficial effects: The buffer fit structure can buffer the rigid collision between the flow guide support side frame and the dam body, and at the same time buffer the structural vibration caused by the impact of water flow.

[0020] In one optional embodiment, the buffer bonding structure includes: an elastic buffer pad fixing frame; an elastic buffer pad, the elastic buffer pad being fixed to one end face of the flow guide support side frame facing the dam body by the elastic buffer pad fixing frame; and a plurality of raised small particles being provided on the surface of the elastic buffer pad facing the dam body, the raised small particles abutting against the surface of the dam body.

[0021] Beneficial effects: The raised particles on the surface of the elastic buffer pad can embed into the pits on the surface of the dam, achieving a tight fit with the dam body. This prevents water from entering the gap between the elastic buffer pad and the dam body, thus preventing local high-pressure scouring. It also protects the connection stability between the flow guide support side frame and the dam body, ensuring the long-term reliable operation of the entire scour-resistant structure in complex water flow environments.

[0022] In one alternative implementation, the width of the deflector structure gradually increases from top to bottom.

[0023] Beneficial effects: The width of the guide plate structure gradually increases from top to bottom, which can increase the contact area with the water flow and gradually transform the eddy into a downward water flow; at the same time, it can also reduce the downward impact force of the water flow and reduce the scouring of the surrounding seabed. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a marine pile foundation anti-scour structure according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the pile bottom flow collection and stabilization cover of an anti-scour structure for marine pile foundations according to an embodiment of the present invention;

[0027] Figure 3 This is a top view of a pile bottom flow collection and stabilization hood for an anti-scour structure of marine pile foundation according to an embodiment of the present invention;

[0028] Figure 4 This is a vertical cross-sectional view of the pile bottom flow collection and stabilization cover of a marine pile foundation anti-scour structure according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the buffer bonding structure of a marine pile foundation anti-scour structure according to an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Main pile foundation; 2. Guide plate structure; 201. Guide support side frame; 2011. Flow obstruction surface; 202. Lower support guide plate; 2021. Anchor bolt hole; 2022. Guide surface; 3. Pile bottom flow collection and stabilization cover; 301. Pile bottom flow collection and stabilization cover; 302. Central flow collection cylinder; 303. Flow collection chamber; 4. Buffer fitting structure; 401. Elastic buffer pad fixing frame; 402. Elastic buffer pad; 403. Protruding small particles; 5. Honeycomb airfoil composite cavity structure; 501. Honeycomb interlayer; 6. Dam body; 7. Compacted zone; 8. Connector; 801. Connecting bracket. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0034] According to an embodiment of the present invention, a marine pile foundation anti-scour structure is provided, comprising: a connector 8 and a flow guide plate structure 2. The connector is adapted to be connected to the pile foundation body 1. The flow guide plate structure 2 has one end abutting against the dam body 6 and the other end connected to the connector 8; the flow guide plate structure 2 has a flow-blocking surface 2011 and a flow-guiding surface 2022, the flow-blocking surface 2011 forming an angle with the direction of eddy current disturbance to block the eddy current around the pile foundation body 1, and the flow-guiding surface 2022 connecting with the flow-blocking surface 2011 to guide the fluid discharged from the flow-blocking surface 2011 as a downward water flow.

[0035] When the turbulent eddies reach the guide plate structure 2, the flow-blocking surface 2011, at an angle to the direction of eddy disturbance, can block the flow direction of the eddies. Simultaneously, the guide surface 2022, in conjunction with the flow-blocking surface 2011, guides the fluid directed from the flow-blocking surface 2011 into a downward water flow. The eddies are guided into a downward, orderly water flow, thereby reducing the scouring of the surrounding seabed and weakening the lateral impact of the eddies on the pile foundation.

[0036] In one embodiment, the guide plate structure 2 includes: a guide support side frame 201 and a lower support guide plate 202. One end of the guide support side frame 201 abuts against the dam body 6, and the other end is connected to the connector 8; a flow-blocking surface 2011 is disposed on the guide support side frame 201. The lower support guide plate 202 is disposed below the guide support side frame 201, and the lower support guide plate 202 includes a side plate and a bottom plate. The side plate of the lower support guide plate 202 is connected to the guide support side frame 201, and the bottom plate of the lower support guide plate 202 is disposed on and connected to the seabed; a flow-guiding surface 2022 is disposed on the lower support guide plate 202.

[0037] When turbulent eddies surge to the guide plate structure 2, the flow-blocking surface 2011 on the guide support side frame 201 blocks the flow direction of the eddies. Combined with the guide surface 2022 on the lower support guide plate 202, the fluid discharged from the flow-blocking surface 2011 is guided into a downward, orderly flow. This effectively reduces the generation of eddies around the pile foundation body 1, significantly weakens the lateral impact of the eddies on the pile foundation, and also reduces the scouring of the surrounding seabed by the eddies. The side plate of the lower support guide plate 202 guides the fluid discharged from the flow-blocking surface 2011 of the guide support side frame 201 into a downward, orderly flow, optimizing the flow path and dispersing the impact force of the water flow. Simultaneously, guided by the side plate of the lower support guide plate 202, the downward, orderly flow is guided to the bottom plate of the lower support guide plate 202, further reducing the scouring of the surrounding seabed. The bottom plate of the lower support guide plate 202 is connected to the seabed, which enhances the stability of the marine pile foundation anti-scour structure and at the same time plays a certain role in protecting the seabed around the main body of the pile foundation 1.

[0038] More specifically, the bottom plate of the lower support guide plate 202 is provided with a number of anchor bolt holes 2021, and the anchor bolts pass through the anchor bolt holes 2021 to fix the lower support guide plate 202 to the seabed.

[0039] In one embodiment, the side of the flow guide support side frame 201 away from the dam body 6 is configured as a first curved surface, and the side plate of the lower support flow guide plate 202 facing the wall of the dam body 6 is configured as a second curved surface. The connection surface between the flow guide support side frame 201 and the lower support flow guide plate 202 is an arc-shaped transition surface, and the flow guide support side frame 201 and the lower support flow guide plate 202 form a double curvature airfoil section.

[0040] When the eddy is guided into a downward flow, the downward impact force of the water gradually decreases under the guidance of the first curved surface of the guide support side frame 201 and the second curved surface of the lower support guide plate 202. Simultaneously, the connection surface between the guide support side frame 201 and the lower support guide plate 202 is an arc-shaped transition surface, which allows for a smooth connection between the surfaces of the guide support side frame 201 and the lower support guide plate 202, without any right angles or sharp protrusions. When the downward flow reaches the arc-shaped transition surface, the arc-shaped transition surface effectively reduces water flow resistance, allowing the water to flow more smoothly along the connection surface. This avoids local turbulence caused by structural abrupt changes disrupting the downward flow path, and further reduces the risk of localized erosion of the seabed.

[0041] More specifically, the guide plate structure 2 formed by connecting the flow guide support side frame 201 and the lower support guide plate 202 is an integrally molded structure; the integrally molded structure can enhance the connection strength between the flow guide support side frame 201 and the lower support guide plate 202, and greatly reduce the risk of separation or breakage of the guide plate structure 2 under long-term water flow impact.

[0042] In one embodiment, the flow guide support side frame 201 or the lower support flow guide plate 202 is provided with a cavity, and the cavity is filled with a honeycomb airfoil composite cavity structure 5; the honeycomb airfoil composite cavity structure 5 in the flow guide support side frame 201 is adapted to absorb the impact force of water flow impacting the flow guide support side frame 201; the honeycomb airfoil composite cavity structure 5 in the lower support flow guide plate 202 is adapted to absorb the impact force of water flow impacting the lower support flow guide plate 202.

[0043] The guide support side frame 201 or the lower support guide plate 202 has a cavity inside, which is filled with a honeycomb airfoil composite cavity structure 5. The honeycomb airfoil composite cavity structure 5 is suitable for absorbing the impact force of eddy currents on the guide support side frame 201 or the lower support guide plate 202. The porous honeycomb structure of the honeycomb airfoil composite cavity structure 5 can effectively disperse and absorb the kinetic energy generated by the eddy current impact, significantly reducing the instantaneous impact stress borne by the guide support side frame 201 or the lower support guide plate 202; at the same time, the porous honeycomb structure of the honeycomb airfoil composite cavity structure 5 can effectively reduce the self-weight of the overall structure while ensuring structural strength, thus reducing the additional load on the pile foundation main body 1.

[0044] In one embodiment, the honeycomb airfoil composite cavity structure 5 includes: a honeycomb interlayer 501; the honeycomb interlayer 501 is embedded in the cavity of the flow guide support side frame 201 or the lower support flow guide plate 202; the honeycomb interlayer 501 has a plurality of honeycomb cavities inside, and the honeycomb cavities are filled with a plurality of viscoelastic silicone microspheres. The viscoelastic silicone microspheres themselves have elastic deformation. When the flow guide support side frame 201 or the lower support flow guide plate 202 is subjected to eddy current impact, the viscoelastic silicone microspheres are compressed and undergo elastic deformation to absorb the kinetic energy generated by the water flow impact; when the multiple viscoelastic silicone microspheres in a honeycomb cavity are subjected to water flow impact, the multiple viscoelastic silicone microspheres in the honeycomb cavity convert the impact kinetic energy of the water flow into heat energy and deformation through mutual compression and friction, further absorbing the kinetic energy generated by the water flow impact; the honeycomb interlayer 501 satisfies the requirements of lightweighting of the flow guide support side frame 201 and the lower support flow guide plate 202 while also satisfying the overall structural rigidity.

[0045] More specifically, the viscoelastic silicone microspheres have a diameter of 1-3 nm, the cell side length of the 501 honeycomb interlayer is 5 mm, and the wall thickness is 0.1 mm. The small size of the viscoelastic silicone microspheres gives them extremely high deformation sensitivity, enabling them to respond to minute water flow impacts and dissipate energy.

[0046] In one embodiment, a plurality of pile bottom flow-collecting and stabilizing hoods 3 are provided on the bottom plate of the lower supporting guide plate 202. The pile bottom flow-collecting and stabilizing hoods 3 are adapted to guide the water flow to converge at the bottom of the pile bottom flow-collecting and stabilizing hoods 3. The water flow guided to the seabed exerts continuous pressure on the surface soil, causing the soil particles to bind tightly and forming a compacted zone 7 with higher shear strength. The compacted zone 7 formed by the convergence of water flow guided by the pile bottom flow-collecting and stabilizing hoods 3 can effectively enhance the density of the seabed around the pile foundation body 1, thereby enhancing the shear strength of the seabed and improving the bottom stability of the pile foundation body 1.

[0047] In one embodiment, the pile bottom flow collecting and stabilizing cover 3 includes: a pile bottom flow collecting and stabilizing cover 301 and a central flow collecting cylinder 302. The pile bottom flow collecting and stabilizing cover 301 has a conical structure with a through conical cavity inside; the pile bottom flow collecting and stabilizing cover 301 penetrates the bottom plate of the lower supporting guide plate 202, and the outer surface of the pile bottom flow collecting and stabilizing cover 301 is provided with flow guiding patterns. The central flow collecting cylinder 302 is disposed in the conical cavity of the pile bottom flow collecting and stabilizing cover 301; the central flow collecting cylinder 302 has a through flow collecting chamber 303, which communicates with the conical cavity of the pile bottom flow collecting and stabilizing cover 301.

[0048] The pile bottom flow collection and stabilization cover 301 is a cone-shaped structure with a downward-pointing cone angle of 60°. The generatrix (the straight side of the cone) forms a 30° angle with the bottom surface. When the water flows through the lower support guide plate 202 to the pile bottom flow collection and stabilization cover 301, the water flows towards the bottom along the cone surface, and the direction of the water flow forms a 30° angle with the seabed surface, avoiding the violent scouring caused by vertical impact on the seabed. The 30° angle of the generatrix causes the water flow to impact the seabed at an oblique angle, which reduces the direct impact force on the seabed and generates continuous pressure on the surface soil of the seabed through the water flow, making the soil particles tightly bonded. This forms a compacted zone 7 with higher shear strength around the pile bottom flow collection and stabilization cover 3, reducing the scouring of the seabed around the pile foundation and indirectly improving the pull-out and overturning resistance of the pile foundation. The flow guiding patterns on the surface of the pile bottom flow collecting and stabilizing cover 301 can further guide the water flow to converge along the surface path of the pile bottom flow collecting and stabilizing cover 301, and avoid the disorderly diffusion of water flow on the surface of the pile bottom flow collecting and stabilizing cover 301.

[0049] When the upper water flow is guided to the pile bottom flow-collecting and stabilizing cover 3 by the lower support guide plate 202, the central flow-collecting cylinder 302 guides the water flow to the central area of ​​the seabed through the flow-collecting chamber 303, avoiding large-scale scouring caused by the water flow spreading in all directions; at the same time, the flow-collecting chamber 303 can buffer the water flow, reduce the water flow velocity, and further reduce the impact on the seabed. The flow-collecting chamber 303 is connected to the conical cavity of the pile bottom flow-collecting and stabilizing cover 301 to form an integrated water flow channel, ensuring the continuity of water flow guidance.

[0050] The conical structure of the pile bottom flow collection and stabilization cover 301, combined with the flow guiding pattern on its outer surface, can guide the water flow to converge along a preset path, avoiding disorderly diffusion of the water flow on the surface of the pile bottom flow collection and stabilization cover 301; the central flow collection cylinder 302 can concentrate and guide the dispersed water flow to the central area of ​​the seabed, avoiding large-scale scouring caused by the water flow spreading to the surrounding areas; at the same time, the flow collection chamber 303 can buffer the water flow, reduce the water flow velocity, and further reduce the impact on the seabed.

[0051] More specifically, the flow guiding pattern on the surface of the pile bottom flow collection and stabilization cover 301 adopts a spiral or radial flow guiding pattern; according to the specific water flow characteristics of the seabed area, a composite flow guiding pattern can also be adopted to adapt to the water flow conditions of different sea areas, further optimize the water flow guidance effect, and enhance the scour resistance.

[0052] More specifically, the pile bottom flow collection and stabilization cover 301 is made of corrosion-resistant metal, such as titanium alloy or galvanized steel.

[0053] More specifically, the compaction zone 7 covers an area 2-3 times the diameter of the bottom surface of the pile bottom flow collection and stabilization hood 301, and is symmetrically distributed around the central axis of the pile bottom flow collection and stabilization hood 301. The size design of the compaction zone 7 can cover the key area around the bottom of the pile foundation, ensuring that the seabed soil around the pile foundation is in a compacted state, avoiding the expansion of scour pits caused by local uncompacted areas; the symmetrically distributed compaction zone 7 makes the pile foundation uniformly stressed, improving the overall stability.

[0054] In one embodiment, a buffer fitting structure 4 is provided between the flow guide support side frame 201 and the dam body 6, and the buffer fitting structure 4 is connected to one end face of the flow guide support side frame 201 facing the dam body 6. The buffer fitting structure 4 has high elasticity. When the eddy current impacts the flow guide support side frame 201, the buffer fitting structure 4 can buffer the rigid collision between the flow guide support side frame 201 and the dam body 6, and at the same time buffer the structural vibration caused by the water flow impact.

[0055] In one embodiment, the buffer bonding structure 4 includes an elastic buffer pad fixing frame 401 and an elastic buffer pad 402. The elastic buffer pad 402 is fixed to the end face of the flow guide support side frame 201 facing the dam body 6 by the elastic buffer pad fixing frame 401; the surface of the elastic buffer pad 402 facing the dam body 6 is provided with a plurality of raised small particles 403, which abut against the surface of the dam body 6. When water flows through the gap between the flow guide support side frame 201 and the dam body 6 and enters the pit on the surface of the dam body 6, a local high-pressure zone will be formed in the pit. The high-pressure water flow will generate impact stress on the flow guide support side frame 201, which may easily damage the tight bonding connection between the flow guide support side frame 201 and the dam body 6, and will also increase the gap between the flow guide support side frame 201 and the dam body 6. By abutting the raised particles 403 on the elastic buffer pad 402 against the surface of the dam body 6, the raised particles 403 can embed into the pits on the surface of the dam body 6, making the elastic buffer pad 402 and the dam body 6 fit tightly together. This prevents water from entering the gap between the elastic buffer pad 402 and the dam body 6 and forming local high-pressure scouring. At the same time, it enhances the connection stability between the flow guide support side frame 201 and the dam body 6, ensuring that the entire anti-scouring structure can operate reliably for a long time in complex water flow environments.

[0056] More specifically, the elastic cushioning pad 402 is made of elastic, corrosion-resistant rubber.

[0057] Optionally, the elastic corrosion-resistant rubber is either chloroprene rubber or ethylene propylene diene monomer (EPDM) rubber.

[0058] In one embodiment, the width of the guide vane structure 2 gradually increases from top to bottom. This gradual increase in width increases the contact area with the water flow, gradually transforming the eddy current into a downward flow; it also reduces the downward impact force of the water flow, mitigating erosion of the surrounding seabed.

[0059] In one embodiment, the connector 8 includes a connecting bracket 801, one end of which is fixedly connected to the flow guide support side frame 201, and the other end is fitted onto the outer wall of the pile foundation body 1 via an arc-shaped collar, and is detachably connected to the pile foundation body 1; the arc-shaped collar is adapted to the diameter of the pile foundation body 1. The fixed connection between the connecting bracket 801 and the flow guide support side frame 201 can effectively resist the impact force generated by the water flow; the detachable connection between the arc-shaped collar and the pile foundation body 1 facilitates the inspection, maintenance and replacement of the anti-scour structure in the later stage, improving the convenience of operation and maintenance of the structure.

[0060] More specifically, the arc-shaped collar is connected to the main pile body 1 by circumferentially distributed expansion anchors, achieving a detachable connection. This expansion anchor connection method not only facilitates installation and replacement but also provides a certain diameter tolerance, effectively addressing construction and installation deviations and ensuring a tight fit between the arc-shaped collar and the main pile body 1. The end of the connecting bracket 801 connected to the flow guide support side frame 201 is fixed by welding. This welding connection strengthens the rigid connection between the two, enhancing their ability to withstand the lateral impact of water flow.

[0061] More specifically, the connecting bracket 801 adopts a frame structure, which can distribute the load transmitted by the guide support side frame 201 and avoid excessive local stress on the main body of the pile foundation 1, which could lead to structural damage.

[0062] Optionally, the frame structure of the connecting bracket 801 can be either a rectangular grid frame or a triangular grid frame.

[0063] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A marine pile foundation scour-resistant structure, characterized in that, include: Connector (8), the connector (8) being adapted to be connected to the pile foundation body (1); The guide plate structure (2) has one end abutting against the dam body (6) and the other end connected to the connector (8); the guide plate structure (2) has a flow-blocking surface (2011) and a flow-guiding surface (2022), the flow-blocking surface forms an angle with the direction of vortex disturbance to block the vortex around the pile foundation body (1), and the flow-guiding surface (2022) is connected to the flow-blocking surface (2011) to guide the fluid discharged from the flow-blocking surface as downward water flow; The guide vane structure (2) includes: A flow-guiding support side frame (201) is provided, one end of which abuts against the dam body (6) and the other end is connected to the connector (8); the flow-blocking surface (2011) is provided on the flow-guiding support side frame (201); The lower support guide plate (202) is disposed below the guide support side frame (201). The lower support guide plate (202) includes a side plate and a bottom plate. The side plate of the lower support guide plate (202) is connected to the guide support side frame (201), and the bottom plate of the lower support guide plate (202) is disposed on the seabed and connected to the seabed. The guide surface (2022) is disposed on the lower support guide plate (202).

2. The scour-resistant structure for marine pile foundations according to claim 1, characterized in that, The side of the flow guide support side frame (201) away from the dam body (6) is set as a first curved surface, and the side plate of the lower support flow guide plate (202) facing the wall of the dam body (6) is set as a second curved surface. The connection surface between the flow guide support side frame (201) and the lower support flow guide plate (202) is an arc transition surface. The flow guide support side frame (201) and the lower support flow guide plate (202) form a double curvature airfoil section.

3. The scour-resistant structure for marine pile foundations according to claim 1, characterized in that, The flow guide support side frame (201) or the lower support flow guide plate (202) is provided with a cavity, and the cavity is filled with a honeycomb airfoil composite cavity structure (5); the honeycomb airfoil composite cavity structure (5) in the flow guide support side frame (201) is suitable for absorbing the impact force of water flow impacting the flow guide support side frame (201); the honeycomb airfoil composite cavity structure (5) in the lower support flow guide plate (202) is suitable for absorbing the impact force of water flow impacting the lower support flow guide plate (202).

4. The scour-resistant structure for marine pile foundations according to claim 3, characterized in that, The honeycomb airfoil composite cavity structure (5) includes: a honeycomb interlayer (501), which is embedded in the cavity of the flow guide support side frame (201) or the lower support flow guide plate (202); the honeycomb interlayer (501) has a plurality of honeycomb cavities inside, and the honeycomb cavities are filled with a plurality of viscoelastic silicone microspheres.

5. The scour-resistant structure for marine pile foundations according to claim 1, characterized in that, The bottom plate of the lower support guide plate (202) is provided with several pile bottom flow collection and stabilization cover (3). The pile bottom flow collection and stabilization cover (3) is suitable for guiding the water flow to converge at the bottom of the pile bottom flow collection and stabilization cover (3) to form a compaction zone (7).

6. The scour-resistant structure for marine pile foundations according to claim 5, characterized in that, The pile bottom flow collection and stabilization cover (3) includes: The pile bottom flow collecting and stabilizing cover (301) is a conical structure with a through conical cavity inside; the pile bottom flow collecting and stabilizing cover (301) penetrates the bottom plate of the lower supporting guide plate (202), and the outer surface of the pile bottom flow collecting and stabilizing cover (301) is provided with guide patterns; A central flow collector cylinder (302) is disposed within the conical cavity of the pile bottom flow collector and stabilizer hood (301); a through flow collector chamber (303) is disposed within the central flow collector cylinder (302), and the flow collector chamber (303) is connected to the conical cavity of the pile bottom flow collector and stabilizer hood (301).

7. The scour-resistant structure for marine pile foundations according to claim 1, characterized in that, A buffer fitting structure (4) is provided between the flow guide support side frame (201) and the dam body (6), and the buffer fitting structure (4) is connected to one end face of the flow guide support side frame (201) facing the dam body (6).

8. The scour-resistant structure for marine pile foundations according to claim 7, characterized in that, The buffer bonding structure (4) includes: Elastic buffer pad fixing frame (401); An elastic buffer pad (402) is fixed to one end face of the flow guide support side frame (201) facing the dam body (6) by the elastic buffer pad fixing frame (401); the surface of the elastic buffer pad (402) facing the dam body (6) is provided with a number of protruding small particles (403), and the protruding small particles (403) abut against the surface of the dam body (6).

9. A marine pile foundation scour-resistant structure according to any one of claims 1-8, characterized in that, The width of the guide plate structure (2) gradually increases from top to bottom.

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