Sand-retaining and silt-reducing structure of energy-exchange and fusion combined tube screen assembly

Abstract

The application relates to a sand-blocking and silt-reducing structure of an energy-exchanging and fusing cylinder screen combination, which comprises a plurality of rigid cylinders and a plurality of sand-blocking assemblies connected in a head-to-tail mode, the rigid cylinders and the sand-blocking assemblies are arranged alternately, the rigid cylinder is in a sleeve structure and is vertically arranged, the rigid cylinder is partially inserted into a seabed to fix the rigid cylinder, the rigid cylinder can be connected with an offshore wind turbine and serves as a foundation of a tower cylinder of the wind turbine; an outer wall of an outer sea side of an outer cylinder is provided with a half-circle sand-settling interlayer; the sand-blocking assembly comprises a flexible screen and a falling object, the flexible screen is vertically arranged, the bottom of the flexible screen is provided with the falling object to prevent the sand from passing below the screen, the two ends of the flexible screen are connected with the rigid cylinders on the two sides of the flexible screen through tenon-and-slot type connecting pieces, the rigid cylinders provide supporting and positioning functions for the flexible screen; a stand column is arranged between two adjacent rigid cylinders, two slide plates are arranged on the two sides of the bottom of the stand column, the tail of the slide plate is communicated with the sand-settling interlayer, and the top surface of the slide plate is inclined to input the accumulated sand into the sand-settling interlayer.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic engineering structure technology for sand-blocking and silt-reducing, and specifically relates to a sand-blocking and silt-reducing structure with a combination of energy-integrated cylindrical curtain structures. Background Technology

[0002] Currently, breakwater and sand-blocking structures used in coastal engineering, port engineering, and waterway engineering generally fall into two main categories: one is solid structures such as riprap-filled slope breakwaters and sand-filled bag breakwaters; the other is solid structures made of concrete components such as caissons and semi-circular structures. Both types of structures require significant construction costs, necessitating the mining of sand and gravel and encroachment on the sea area, resulting in a substantial increase in investment for solid breakwater structures. Furthermore, solid sand breakwaters or concrete structures have adverse impacts on the marine or riverine ecological environment. Solid structures interact strongly with hydrodynamic forces such as waves and currents, resulting in large structural cross-sections and significant sea area occupation. Especially for soft soil foundations, solid breakwaters are heavy and generally require foundation treatment, leading to more complex construction procedures and increased engineering costs. Simultaneously, solid breakwaters often alter local flow fields, causing certain environmental impacts.

[0003] On the other hand, in recent years, offshore and port areas have actively developed wind power, and have actively promoted and explored the integrated development of infrastructure and green clean energy. Developing wind power based on breakwaters and sand-retaining dikes in ports or nearshore areas is an important scenario for cross-energy integration. However, constructing wind turbine foundations on the solid structure of breakwaters and sand-retaining dikes may affect the stability of the original dike structure, or the wind turbine foundations may not be well integrated with the dike structure. For these reasons, there is an urgent need to develop a new type of sand-retaining and silt-reducing structure that integrates cross-energy integration. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a sand-blocking and silt-reducing structure consisting of a combination of cylindrical tubes with integrated energy exchange, comprising several rigid tubes connected end to end and several sand-blocking components. The rigid tubes and sand-blocking components are arranged alternately. The rigid tubes are hollow cylinders and are vertically arranged. The rigid tubes are partially inserted into the seabed to fix them in place. The rigid tubes can be connected to offshore wind turbines and serve as the foundation for the wind turbine towers.

[0005] The rigid cylinder is a sleeve structure. The inner cylinder is used to insert the pipe pile at the bottom of the offshore wind turbine, and the outer cylinder is hollow inside. The outer wall of the outer cylinder on the sea side is provided with a semi-circular sedimentation interlayer. The top of the sedimentation interlayer is open and the bottom is connected to the internal space of the outer cylinder, so that the sediment collected by the sedimentation interlayer can be introduced into the outer cylinder.

[0006] The sand-blocking component includes a flexible curtain and a weight. The flexible curtain is set vertically, and the weight is set at the bottom of the flexible curtain to prevent mud and sand from passing under the curtain. The two ends of the flexible curtain are connected to rigid cylinders on both sides of the flexible curtain by tenon and groove connectors. The rigid cylinders provide support and positioning for the flexible curtain.

[0007] A column is installed between two adjacent rigid cylinders. A sliding plate is installed on each side of the bottom of the column. The tail of the sliding plate is connected to the sedimentation interlayer. The top surface of the sliding plate is inclined so that the mud and sand accumulated on the sliding plate can be fed into the sedimentation interlayer.

[0008] Several rigid cylinders and several sand-blocking components are evenly arranged along the axial direction of the sand-blocking and silt-reducing structure. A flexible curtain is used to intercept sediment. The flexible curtain connects the rigid cylinders at both ends, which provide stable positioning and can also be connected to offshore wind turbines to achieve energy exchange. This invention utilizes a flexible curtain for sand blocking and silt reduction, resulting in a structure that occupies less sea area, allows for flow and sand blocking, is environmentally friendly, easy to construct, has good durability, and can be integrated with wind turbine foundations, reducing overall investment.

[0009] Optionally, the central axis of the rigid cylinder is vertically arranged, and the material is selected from reinforced concrete or steel structure, which has sufficient strength to resist the impact of sea waves and support the offshore wind turbine; the distance between two adjacent rigid cylinders is 1-8 times the equivalent diameter of the rigid cylinder; the inner cylinder and the outer cylinder are arranged concentrically.

[0010] Optionally, the outer wall of the outer cylinder is provided with a number of first sand leakage ports at the position corresponding to the bottom of the sedimentation interlayer. The number of first sand leakage ports are evenly arranged along the circumference of the outer half of the rigid cylinder, and the silt in the sedimentation interlayer enters the interior of the outer cylinder through the first sand leakage ports.

[0011] Optionally, the tenon-and-groove connector includes a steel section and an open tenon. The open tenon is square and hollow inside. One side of the open tenon is welded to the outer wall of the rigid cylinder, and the other side has an opening facing the flexible screen. The opening extends through the top of the open tenon. The longitudinal section of the steel section is T-shaped. The larger end of the steel section extends from the opening at the top of the open tenon into the interior of the open tenon from top to bottom. The smaller end of the steel section passes through the opening and extends out of the open tenon, and then connects to one end of the flexible screen.

[0012] After the steel profile and the tenon joint are installed, filler is poured into the tenon joint to fix the relative position of the steel profile and the tenon joint, thereby improving the connection strength between the flexible curtain and the rigid cylinder.

[0013] Optionally, the flexible curtain is a densely woven high-strength geotextile; the tensile strength of the flexible curtain is not less than 300kN / m, which can resist the impact of waves in most near-shore areas, and the equivalent aperture is not greater than 0.01mm, which can effectively intercept sediment; the horizontal length of the flexible curtain is slightly greater than the distance between the two rigid cylinders at both ends, and the flexible curtain takes on an arc shape under the action of waves and currents.

[0014] Optionally, the falling object is a sand rib or a concrete block, positioned below the flexible curtain and connected to the flexible curtain, to prevent mud and sand from passing under the flexible curtain and to increase the friction between the flexible curtain and the seabed.

[0015] Optionally, a column is provided in the middle between two adjacent rigid cylinders, and a liftable slide is provided between one side of the column and the corresponding rigid cylinder on that side. The slide is laid above the falling object. The end of the slide closest to the column is the front end, and the other end is the rear end. The front end of the slide is the thickest, and the rear end is the thinnest, so that the upper surface of the slide slopes downward from the front end to the rear end.

[0016] Further optionally, the column is a vertical cuboid with a hollow interior, and the top of the column is above the sea level; the column is equipped with a movable lifting block inside, and a connecting rod is provided on each side of the lifting block, the connecting rods protruding from the side of the column and connecting to the front end of the slide plate; the top of the lifting block is connected to a floating object by a pull rope, and the up and down movement of the lifting block is controlled by increasing or decreasing the number of floating objects.

[0017] Optionally, a second, openable sand outlet is provided on one side of the sand settling interlayer at the position corresponding to the rear end of the slide plate, for receiving the mud and sand sliding down the slide plate, so that the mud and sand enter the sand settling interlayer.

[0018] Optionally, the front side of the column faces the open sea, and the rear side of the column is connected to the middle of the side of the flexible curtain facing the open sea.

[0019] The left and right sides of the column face the rigid cylinders on both sides respectively. There is a vertical hollow strip on the left and right sides of the column, which allows the corresponding connecting rod to pass through the column. The rear end of the slide is movable. Attached Figure Description

[0020] Figure 1 A schematic diagram of a sand-blocking and silt-reducing structure consisting of a combination of cylindrical curtain walls with energy exchange integration;

[0021] Figure 2 This is a schematic diagram of a mortise and tenon joint;

[0022] Figure 3 This is a schematic diagram of the flexible screen and its supporting pillars.

[0023] Figure 4 This is a schematic diagram of the column;

[0024] Figure 5 This is a schematic diagram of a rigid cylinder and a sedimentation interlayer.

[0025] In the attached diagram, 1-rigid cylinder, 2-flexible curtain, 3-falling object, 4-inner cylinder, 5-sand-sinking interlayer, 6-first sand-leaking port, 7-second sand-leaking port, 8-section steel, 9-opening tenon and groove, 10-reinforcing rib, 11-steel wire rope, 12-column, 13-slide plate, 14-lifting block, 15-connecting rod, 16-outer cylinder, 17-floating object, 18-pull rope. Detailed Implementation

[0026] This embodiment provides a sand-blocking and silt-reducing structure based on a combination of energy-integrated cylindrical curtain structures, such as... Figures 1-5 As shown, it includes several rigid cylinders 1 connected end to end and several sand-blocking components. The rigid cylinders 1 and sand-blocking components are arranged alternately. The rigid cylinder 1 is a hollow cylinder and is set vertically. Part of the rigid cylinder 1 is inserted into the seabed to fix the rigid cylinder 1. The rigid cylinder 1 can be connected to the offshore wind turbine and serve as the foundation of the wind turbine tower.

[0027] The rigid cylinder is a sleeve structure. The inner cylinder 4 is used to insert the pipe pile at the bottom of the offshore wind turbine, and the outer cylinder 16 is hollow inside. The outer wall of the outer cylinder on the sea side is provided with a semi-circular sedimentation interlayer 5. The top of the sedimentation interlayer 5 is open and the bottom is connected to the internal space of the outer cylinder 16, so that the sediment collected by the sedimentation interlayer 5 is introduced into the outer cylinder.

[0028] The sand-blocking component includes a flexible curtain 2 and a weight 3. The flexible curtain 2 is set vertically, and the weight 3 is set at the bottom to prevent mud and sand from passing under the curtain. The two ends of the flexible curtain 2 are connected to the rigid cylinders 1 on both sides of the flexible curtain 2 by tenon and mortise type connectors. The rigid cylinders 1 provide support and positioning for the flexible curtain 2.

[0029] A column 12 is provided between two adjacent rigid cylinders. A sliding plate 13 is provided on each side of the bottom of the column. The tail of the sliding plate 13 is connected to the sedimentation interlayer 5. The top surface of the sliding plate is inclined so that the mud and sand accumulated on the sliding plate can be fed into the sedimentation interlayer.

[0030] Optionally, the central axis of the rigid cylinder 1 is vertically arranged, preferably with its top above sea level. Its material is selected from reinforced concrete or steel structures, possessing sufficient strength to withstand wave impact and support the offshore wind turbine. The distance between two adjacent rigid cylinders 1 is 1-8 times the equivalent diameter of the rigid cylinder 1. The inner cylinder 4 and the outer cylinder 16 are concentrically arranged. The insertion depth of the rigid cylinder 1 into the seabed is adjusted according to the stability of the rigid cylinder 1. When the rigid cylinder 1 also serves as the tower foundation of the offshore wind turbine, the insertion depth of the rigid cylinder 1 is adjusted according to the overall stability of the wind turbine and the rigid cylinder 1. One-half to two-thirds of the height of the rigid cylinder 1 can be inserted below the seabed.

[0031] Optionally, the bottom of the sedimentation interlayer 5 is 30-50cm higher than the seabed surface to prevent the sediment from the seabed surface from directly entering the sedimentation interlayer 5; the sedimentation interlayer 5 guides the collected sediment into the outer cylinder, so that the filling material in the outer cylinder increases and the stability of the rigid cylinder 1 becomes better and better.

[0032] The bottom of the sedimentation interlayer 5 can be at the same height as the seabed or lower than the seabed, depending on the ease of construction of the rigid cylinder and the specific requirements for filling the rigid cylinder with soil and sand.

[0033] The foundation of an offshore wind turbine typically uses a large-diameter steel pipe pile, with a diameter of 6 to 10 meters, which is similar to the diameter of the rigid cylinder 1 of this invention. The pile is tens of meters long, which meets the depth requirements of the rigid cylinder 1 of this invention. A large hydraulic pile hammer is used to drive it into the seabed. The upper part of the single pile is connected to the wind turbine tower through flanges and bolts.

[0034] Optionally, the outer wall of the outer cylinder is provided with a plurality of first sand leakage ports 6 at the position corresponding to the bottom of the sedimentation interlayer 5. The plurality of first sand leakage ports 6 are evenly arranged along the circumference of the outer half-circumference of the rigid cylinder 1, and the mud and sand in the sedimentation interlayer 5 enter the interior of the outer cylinder through the first sand leakage ports 6.

[0035] The outer sea side refers to the side of the silt-reducing structure facing the deep sea, while the channel side refers to the side of the silt-reducing structure facing the channel, harbor basin, and land. The silt-reducing structure is used to block sediment carried by ocean waves and tides, and to contain the sediment on the outer sea side of the structure. The outer sea side of the rigid cylinder 1 blocks sediment. When the accumulated sediment height exceeds the top opening of the sedimentation interlayer 5, the sediment enters the sedimentation interlayer 5 and then enters the rigid cylinder 1 through the first sand leakage port 6. This not only prevents a large amount of sediment from accumulating on the outer sea side of the rigid cylinder 1 but also guides the accumulated sediment into the rigid cylinder 1 as filler.

[0036] Optionally, the tenon-and-groove connector includes a steel profile 8 and an open tenon 9. The open tenon 9 is square and hollow inside. One side of the open tenon 9 is welded to the outer wall of the rigid cylinder 1, and the other side has an opening facing the flexible screen 2. The longitudinal section of the steel profile 8 is T-shaped. The large end of the steel profile 8 extends into the interior of the open tenon 9, and the small end of the steel profile 8 passes through the opening and extends out of the open tenon 9, and then connects to one end of the flexible screen 2.

[0037] After the steel section 8 and the tenon joint 9 are installed, filler is poured into the tenon joint 9 to fix the relative position of the steel section 8 and the tenon joint 9, thereby improving the connection strength between the flexible curtain 2 and the rigid cylinder 1. The filler can be concrete.

[0038] Alternatively, the outer side of the open tenon 9 is provided with two symmetrical reinforcing ribs 10 to further improve the strength of the connection between the open tenon 9 and the rigid cylinder 1.

[0039] Optionally, the flexible curtain 2 is a densely woven high-strength geotextile, which has the advantages of anti-aging and corrosion resistance; the tensile strength of the flexible curtain 2 is not less than 300kN / m, which can resist the impact of waves in most near-shore areas, and the equivalent aperture is not greater than 0.01mm, which can effectively intercept sediment; the horizontal length of the flexible curtain 2 is slightly greater than the distance between the two rigid cylinders 1 at both ends, and the flexible curtain 2 presents an arc shape under the action of waves and currents.

[0040] The tensile strength of the flexible curtain 2 can also be selected based on the stress conditions under the action of wave current. The selection of the equivalent aperture of the flexible curtain 2 is based on effectively blocking the passage of silt and sand.

[0041] Optionally, a steel wire rope 11 is connected to the outer side of the corresponding flexible curtain 2 of the rigid cylinder 1, and the other end of the steel wire rope 11 is connected to the top 1 / 3-1 / 4 of the flexible curtain 2, so that the shape of the flexible curtain 2 maintains vertical sag.

[0042] Optionally, the falling object 3 is a sand rib or a concrete block, located below the flexible curtain 2 and connected to the flexible curtain 2, so as to prevent mud and sand from passing under the flexible curtain 2 and to increase the friction between the flexible curtain 2 and the seabed.

[0043] Compared to solid structures like dumping and concrete components, the sand-blocking and silt-reducing structure described in this invention significantly reduces the amount of sand and gravel used and concrete required, avoiding the environmental damage caused by quarrying sand and gravel. This invention utilizes a flexible curtain 2 for sand blocking and silt reduction, resulting in a small structural cross-section, a significantly reduced sea area footprint, and permeable sand blocking, minimizing impact on local water flow and the surrounding environment, making it an eco-friendly structure. The rigid cylinder 1 and sand-blocking components are well-suited to soft soil foundations, requiring no additional foundation treatment. Furthermore, both the rigid cylinder 1 and the curtain can be prefabricated or manufactured in advance, greatly reducing on-site construction procedures and workload, making construction convenient and quick. By ensuring the horizontal length of the flexible curtain 2 is greater than the net distance between two adjacent rigid cylinders 1, the curtain forms an arc shape under wave action, thereby reducing local stress concentration and dissipating energy, intercepting the migration of sediment particles, improving the structure's sand-blocking effect, improving the structural stress state, and reducing project costs. The flexible curtain 2 is an anti-aging, corrosion-resistant, densely woven high-strength geotextile, easy to maintain. The structure can be integrated with offshore wind power construction, scientifically coordinate marine three-dimensional space resources, promote energy integration, and reduce overall investment.

[0044] According to preliminary calculations, the combined barrel curtain sand-blocking and silt-reducing structure can reduce the cost by more than 20% and the sea area occupied by the traditional riprap slope dike structure under the same conditions by more than 50%. If offshore wind power construction is taken into account, the overall cost can be reduced by 30% to 50% compared with the traditional riprap slope dike structure, which has significant economic benefits.

[0045] A specific embodiment: The inner cylinder has a diameter of 9m, the outer cylinder has a diameter of 9.5m, and both have a wall thickness of 350mm. The rigid cylinder is inserted 10m below the seabed, and the height of the cylinder above the seabed is 5.8m. The clear distance between the two rigid cylinders is 15m. The flexible curtain uses a densely woven polyester warp-knitted geogrid with a bidirectional tensile strength of 800kN / m and a single span horizontal length of 16m, which is greater than the clear distance between the two rigid cylinders, allowing it to form an arc shape under the action of waves and currents, thereby improving the structural stress. The lowest point of the flexible curtain is no less than 5m high, and the lower end uses a 1m wide sand rib structure to prevent silt from passing under the flexible curtain and to increase the friction between it and the seabed. A steel wire rope is installed at the upper end of the flexible curtain to maintain the curtain's shape and vertical sag.

[0046] During construction, rigid cylinders prefabricated in the onshore prefabrication yard are transported to the installation site and placed in designated positions using a crane vessel. The rigid cylinders are then vertically inserted into the seabed using either hammering or water jetting methods. The flexible curtain and sand-ribbed soft structures (fallers) are manufactured and sewn together in the factory, then transported to the installation site and filled with sand. The steel profiles are constructed by clamping one end of the flexible curtain back-to-back to form a T-shaped section, which is then bolted together. The flexible curtain is installed using a specialized hanger. The steel profiles are inserted into corresponding tenon slots via guide rails, then concrete is poured, and steel wire ropes are installed to connect the flexible curtain and rigid cylinders into a vertically integrated structure, thus forming a rigid-flexible combined sand-blocking and silt-reducing structure.

[0047] Optionally, a column 12 is provided at the middle position between two adjacent rigid cylinders 1. A liftable slide plate 13 is provided between one side of the column 12 and the corresponding rigid cylinder 1 on that side. The slide plate 13 is laid above the falling object 3. The end of the slide plate 13 closest to the column 12 is the front end, and the other end is the rear end. The front end of the slide plate 13 has the greatest thickness, and the rear end has the least thickness, so that the upper surface of the slide plate 13 slopes downward from the front end to the rear end.

[0048] The column 12 is a vertical cuboid with a hollow interior. The top of the column 12 is above the sea level, which facilitates marking the position of the sand-blocking and silt-reducing structure and prevents ships from colliding with the sand-blocking components. The column 12 has a movable lifting block 14 inside. A connecting rod 15 is provided on each side of the lifting block 14. The connecting rod 15 extends out of the side of the column 12 and is connected to the front end of the sliding plate 13. The top of the lifting block 14 is connected to the floating object 17 through the pull rope 18. The up and down movement of the lifting block 14 is controlled by increasing or decreasing the number of floating objects 17.

[0049] Optionally, a second, openable sand outlet 7 is provided on one side of the sand settling interlayer 5 at the position corresponding to the rear end of the slide plate 13, for receiving the mud and sand sliding down the slide plate 13, so that the mud and sand enter the sand settling interlayer 5.

[0050] Optionally, the rear side of the column 12 is connected to the middle of the water-facing side of the flexible curtain 2. Although the flexible curtain 2 is divided into two parts, each part can still present an arc shape under the action of the wave current.

[0051] The left and right sides of the column 12 face the rigid cylinders 1 on both sides respectively. A vertical hollow strip is provided on the left and right sides of the column 12, allowing the corresponding connecting rod 15 to pass through the column 12. The rear end of the slide plate 13 is movable, so as not to affect the slight displacement of the slide plate 13 in the left and right directions caused by the lifting and lowering of the front end of the slide plate 13.

[0052] During normal sand-blocking operations, the bottom of the flexible curtain 2 is connected to the falling object 3 and cannot move, allowing the bottom of the flexible curtain 2 on the outer sea side to intercept the mud and sand brought by the waves. The mud and sand continuously accumulate at the bottom of the flexible curtain 2, increasing the burden on the curtain. This invention provides a sliding plate 13 and a lifting block 14 to guide and drain the mud and sand accumulated at the bottom of the curtain. Specifically, when the sliding plate 13 does not rise but rests naturally on the upper surface of the falling object 3, the upper surface of the sliding plate 13 is inclined. When a small amount of mud and sand accumulates on the sliding plate 13, the mud and sand, under their own weight and with the help of the force of the waves, can naturally slide down along the upper surface of the sliding plate 13 to the second sand outlet 7 corresponding to the sand-sinking interlayer 5. The mud and sand accumulate at the second sand outlet 7, and the gravity pushes open the openable baffle at the second sand outlet 7, allowing the mud and sand to enter the sand-sinking interlayer 5 from the second sand outlet 7.

[0053] If the sediment accumulates rapidly at the bottom of the screen, a significant amount of sediment accumulates on the slide plate 13, but the sediment does not slide off smoothly. When the sediment on the slide plate 13 reaches a certain thickness, the number of floating objects connected to the lifting block 14 can be increased artificially. This increases buoyancy and causes the lifting block 14 to rise. The lifting block 14, through the connecting rod 15, causes the front ends of the slide plates 13 on both sides to rise, while the rear ends of the slide plates 13 move slightly to facilitate the sediment on the slide plates 13 sliding down to the second sand outlet 7 and entering the sedimentation layer 5 through the second sand outlet 7. Then, the number of floating objects can be reduced artificially, causing the lifting block 14 to fall and the slide plates 13 to return to their original position, allowing sediment to continue accumulating.

[0054] Optionally, the perforated strip of the column 12 has two symmetrical rubber sheets, the height of which is equal to the height of the perforated strip. The connecting rod 15 passes through the narrow gap between the two rubber sheets, effectively preventing a large amount of mud and sand from entering the interior of the column 12 through the perforated strip. When a large amount of mud and sand accumulates inside the column 12, it can be manually cleaned.

[0055] The inner space of the outer cylinder can accumulate sediment until the sediment level is higher than the first sand leakage port 6. The sediment in the sedimentation interlayer 5 can no longer enter the rigid cylinder 1. At this time, depending on the sediment accumulation, one can choose to immediately clean the inside of the rigid cylinder 1, or temporarily clean the sediment and wait until the outer sea side of the sand-blocking and silt-reducing structure is cleaned. Thus, it can be seen that sediment can enter the rigid cylinder 1 through the sedimentation interlayer 5 and can also delay the sand cleaning cycle of the sand-blocking and silt-reducing structure.

Claims

1. A sand-blocking and silt-reducing structure using a combination of cylindrical curtain structures with integrated energy exchange, characterized in that, It includes several rigid cylinders connected end to end and several sand-blocking components. The rigid cylinders and sand-blocking components are arranged alternately. The rigid cylinders are hollow cylinders and are set vertically. The rigid cylinders are inserted into the seabed to fix them. The rigid cylinders can be connected to offshore wind turbines and serve as the foundation of the wind turbine tower. The rigid cylinder is a sleeve structure. The inner cylinder is used to insert the pipe pile at the bottom of the offshore wind turbine, and the outer cylinder is hollow inside. The outer wall of the outer cylinder on the sea side is provided with a semi-circular sedimentation interlayer. The top of the sedimentation interlayer is open and the bottom is connected to the internal space of the outer cylinder, so that the sediment collected by the sedimentation interlayer can be introduced into the outer cylinder. The sand-blocking component includes a flexible curtain and a weight. The flexible curtain is set vertically, and the weight is set at the bottom of the flexible curtain to prevent mud and sand from passing under the curtain. The two ends of the flexible curtain are connected to rigid cylinders on both sides of the flexible curtain by tenon and groove connectors. The rigid cylinders provide support and positioning for the flexible curtain. A column is installed between two adjacent rigid cylinders. A sliding plate is installed on each side of the bottom of the column. The tail of the sliding plate is connected to the sedimentation interlayer. The top surface of the sliding plate is inclined so that the mud and sand accumulated on the sliding plate can be fed into the sedimentation interlayer.

2. The sand-blocking and silt-reducing structure of the energy-integrated cylindrical curtain combination according to claim 1, characterized in that, The rigid cylinder has its central axis set vertically, and its material is selected from reinforced concrete or steel structure, which has sufficient strength to resist the impact of sea waves and support the offshore wind turbine; the inner cylinder and the outer cylinder are set concentrically.

3. The sand-blocking and silt-reducing structure of the energy-integrated cylindrical curtain combination according to claim 2, characterized in that, The outer wall of the outer cylinder is provided with several first sand leakage ports at the position corresponding to the bottom of the sedimentation interlayer. The several first sand leakage ports are evenly arranged along the circumference of the outer half of the rigid cylinder. The silt in the sedimentation interlayer enters the interior of the outer cylinder through the first sand leakage ports.

4. The sand-blocking and silt-reducing structure of the energy-integrated cylindrical curtain combination according to claim 1, characterized in that, The tenon-and-groove connector includes a steel profile and an open tenon. The open tenon is square and hollow inside. One side of the open tenon is welded to the outer wall of the rigid cylinder, and the other side has an opening facing the flexible curtain. The longitudinal section of the steel section is T-shaped. The larger end of the steel section extends into the interior of the open tenon, and the smaller end of the steel section passes through the opening and extends out of the open tenon, and then connects to one end of the flexible screen. After the steel profile and the tenon joint are installed, filler is poured into the tenon joint to fix the relative position of the steel profile and the tenon joint, thereby improving the connection strength between the flexible curtain and the rigid cylinder.

5. The sand-blocking and silt-reducing structure of the energy-integrated cylindrical curtain combination according to claim 1, characterized in that, The flexible curtain is a densely woven high-strength geotextile; the tensile strength of the flexible curtain is not less than 300kN / m, which can resist the impact of waves in most near-shore areas, and the equivalent aperture is not greater than 0.01mm, which can effectively intercept sediment; the horizontal length of the flexible curtain is slightly greater than the distance between the two rigid cylinders at both ends, and the flexible curtain takes on an arc shape under the action of waves and currents.

6. The sand-blocking and silt-reducing structure of the energy-integrated cylindrical curtain combination according to claim 1, characterized in that, The falling object is a sand rib or a concrete block, placed below the flexible curtain and connected to the flexible curtain to prevent mud and sand from passing under the flexible curtain and to increase the friction between the flexible curtain and the seabed.

7. The sand-blocking and silt-reducing structure of the energy-integrated cylindrical curtain combination according to claim 1, characterized in that, A column is provided in the middle between two adjacent rigid cylinders. A liftable sliding plate is provided between one side of the column and the corresponding rigid cylinder on that side. The sliding plate is laid on top of the falling object. The end of the sliding plate closest to the column is the front end, and the other end is the rear end. The front end of the sliding plate is the thickest, and the rear end is the thinnest, so that the upper surface of the sliding plate slopes downward from the front end to the rear end.

8. The sand-blocking and silt-reducing structure of the energy-integrated cylindrical curtain combination according to claim 7, characterized in that, The column is a vertical cuboid with a hollow interior. The top of the column is above sea level. Inside the column is a movable lifting block. On each side of the lifting block is a connecting rod that extends out of the side of the column and connects to the front end of the sliding plate. The top of the lifting block is connected to a floating object by a pull rope. The up and down movement of the lifting block is controlled by increasing or decreasing the number of floating objects.

9. The sand-blocking and silt-reducing structure of the energy-integrated cylindrical curtain combination according to claim 8, characterized in that, One side of the sedimentation interlayer is provided with a second, openable sand outlet at the rear end of the slide plate, which is used to collect the mud and sand sliding off the slide plate and allow the mud and sand to enter the sedimentation interlayer.

10. The sand-blocking and silt-reducing structure of the energy-integrated cylindrical curtain combination according to claim 9, characterized in that, The front side of the column faces the open sea, and the rear side of the column is connected to the middle of the side of the flexible curtain facing the open sea. The left and right sides of the column face the rigid cylinders on both sides respectively. There is a vertical hollow strip on the left and right sides of the column, which allows the corresponding connecting rod to pass through the column. The rear end of the slide is movable.

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