A tower structure connection node and construction method for deep-sea wind turbines

Abstract

This invention discloses a tower structure connection node and construction method for deep-sea wind turbines, relating to the field of deep-sea wind power engineering technology. The invention includes a first pipe body, a first spiral component, a second pipe body, and a second spiral component. One end of the first pipe body is used to connect to the seabed foundation, and the other end is a connecting end. The first spiral component is embedded in the first pipe body, with its end extending beyond the connecting end of the first pipe body. The second pipe body is connected to the connecting end of the first pipe body. The second spiral component is embedded in the second pipe body, with its central axis collinear with the central axis of the second pipe body. The end of the second spiral component extends from the end of the second pipe body facing the first pipe body, and is abutted and fixedly connected to the end of the first spiral component. This invention's tower structure connection node and construction method for deep-sea wind turbines can significantly shorten construction time, improve structural durability, and reduce the maximum crack width.

Description

Technical Field

[0001] This invention relates to the field of deep-sea wind power engineering technology, and in particular to a tower structure connection node and construction method for deep-sea wind turbines. Background Technology

[0002] As offshore wind power generation moves towards greater offshore scale and complexity, traditional steel towers face severe corrosion problems in the salt spray environment of the sea, with measured annual corrosion rates exceeding 0.1 mm. To address this corrosion issue, a steel-concrete hybrid tower solution has been proposed. However, the concrete layer within the tower often develops cracks exceeding 0.3 mm in width under alternating wind and wave loads, accelerating chloride ion corrosion. Existing steel-concrete structure tower assembly processes at sea rely on hydraulic tensioning equipment to assist in bolt tightening, with single tower section installation taking over 6 hours. This is not only constrained by narrow typhoon windows but also results in high construction costs and long construction periods due to the heavy equipment involved. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a tower structure connection node for deep-sea wind turbines, which can greatly shorten construction time, improve structural durability, and reduce the maximum crack width.

[0004] The present invention also proposes a construction method for the tower structure connection node of a deep-sea wind turbine.

[0005] According to a first aspect of the present invention, a tower structure connection node for a deep-sea wind turbine includes a first pipe body, one end of which is used to connect to a seabed foundation, and the other end of which is a connection end. The first spiral component is embedded in the first pipe body, the central axis of the first spiral component is collinear with the central axis of the first pipe body, and the end of the first spiral component extends out of the connecting end of the first pipe body. The second tube is coaxial with the first tube, and the connection end of the second tube is connected to the first tube. The second spiral component is embedded in the second pipe body. The central axis of the second spiral component is collinear with the central axis of the second pipe body. The end of the second spiral component extends out of the end of the second pipe body facing the first pipe body, and the end of the second spiral component is connected to and fixedly joined with the end of the first spiral component.

[0006] The tower structure connection node for deep-sea wind turbines according to embodiments of the present invention has at least the following beneficial effects: a first auger is embedded in the first pipe body, a second auger is embedded in the second pipe body, and the first and second pipe bodies are connected by the connection between the first and second augers. Offshore assembly does not require hydraulic tensioning equipment, reducing the construction time of a single tower section; the second auger is embedded in the second pipe body, which can be encased in concrete, and the second auger can strengthen the concrete, improve structural durability, and reduce the maximum crack width; the embedding of both the first and second augers can reduce the corrosion rate.

[0007] According to some embodiments of the present invention, a plurality of metal strips are included, the plurality of metal strips are woven into a metal bundle, and the metal bundle is spirally arranged to form a first spiral member or a second spiral member.

[0008] According to some embodiments of the present invention, the outer side of the metal tube bundle is provided with threads, the threads of the metal tube bundle extend from the end face of the metal tube bundle toward the other end, a fixing sleeve is provided between the first helical member and the second helical member, the inner wall of the fixing sleeve is provided with threads, and the threads at both ends of the fixing sleeve are in opposite directions, the threads of the first helical member are engaged with the threads at one end of the fixing sleeve, and the threads of the second helical member are engaged with the threads at the other end of the fixing sleeve.

[0009] According to some embodiments of the present invention, the surface of the fixed sleeve is provided with a through grouting hole.

[0010] According to some embodiments of the present invention, the second tube body includes an outer tube shell, an inner tube shell, and a filling layer. The inner tube shell is inserted into the inner side of the outer tube shell, and the second spiral member is fitted onto the outer side of the inner tube shell and located between the outer tube shell and the inner tube shell. The filling layer is disposed between the outer tube shell and the inner tube shell, and the filling layer wraps around the second spiral member.

[0011] According to some embodiments of the present invention, the outer shell includes an arc-shaped first segment and an arc-shaped second segment, wherein the first segment and the second segment are arranged opposite to each other and assembled to form the outer shell.

[0012] According to some embodiments of the present invention, a plurality of shear keys are provided on the concave side of the first tube segment and the concave side of the second tube segment. In the outer shell of the first tube segment and the second tube segment, the plurality of shear keys are evenly spaced around the circumference of the outer shell. A plurality of grooves are provided on the outer side of the inner shell, and the shear keys can cooperate with the grooves.

[0013] According to some embodiments of the present invention, a plurality of bonding pieces are provided on the outer side of the outer shell, the bonding pieces are arranged along the splice seam of the first tube segment and the second tube segment, and the bonding pieces cover the splice seam of the first tube segment and the second tube segment.

[0014] According to a second aspect of the present invention, a construction method for a tower structure connection node for a deep-sea wind turbine is provided, which involves constructing the tower structure connection node for a deep-sea wind turbine through the following steps. Step S1: Install the first pipe body. One end of the first pipe body is connected to the seabed foundation, and the other end of the first pipe body extends out of the sea surface. The first spiral component is exposed at the end of the first pipe body that extends out of the sea surface. Step S2: Hoist the second spiral component to connect with the first spiral component. Place a fixing sleeve between the second spiral component and the first spiral component. Insert one end of the first spiral component into one end of the fixing sleeve and the other end of the second spiral component into the other end of the fixing sleeve. Rotate the fixing sleeve to connect the first spiral component and the second spiral component. Step S3: Hoist the first tube segment and connect it with the first tube body, then hoist the inner tube shell and insert it from the center of the second spiral component, then hoist the second tube segment and connect it with the first tube body, and at the same time, the second tube segment and the first tube segment are assembled into the outer tube shell; Step S4: Pump concrete from the top sections of the inner and outer shells, and use a vibrator to vent the concrete to ensure that the concrete tightly wraps the second spiral component. After the concrete solidifies, the second pipe body is formed.

[0015] The construction method for the tower structure connection node of the deep-sea wind turbine according to the present invention has at least the following advantages: Compared with hoisting the complete second pipe body and connecting it with the first pipe body, the second pipe body is formed by assembling and pouring concrete on site, which makes the installation process more convenient; when connecting the first spiral component and the second spiral component, there is no interference from the outer pipe segments, which is easy to construct; then the first pipe segment, the inner shell and the second pipe segment are hoisted to form a cavity surrounding the second spiral component for pouring concrete. After the concrete solidifies, the connection node is formed, which does not require the assistance of hydraulic tensioning equipment, and the construction time of a single tower section is greatly reduced.

[0016] According to some embodiments of the present invention, step S2 further includes injecting modified epoxy resin containing carbon nanotubes into the interior of the fixed sleeve through the grouting hole of the fixed sleeve, and then connecting a DC power supply for heating and constant temperature curing.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a complete schematic diagram of the tower structure used for deep-sea wind turbines according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a tower structure connection node for a deep-sea wind turbine according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the fixing sleeve according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the second tube body according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the connection structure between the first segment and the inner shell in an embodiment of the present invention; Figure 6 This is a schematic diagram of the connection structure of the outer shell and the bonding sheet in an embodiment of the present invention.

[0019] Icon labels: Metal tube bundle 001, first tube body 100, first spiral component 200, second tube body 300, outer tube shell 310, first tube segment 311, second tube segment 312, shear key 313, inner tube shell 320, groove 321, filling layer 330, second spiral component 400, fixing sleeve 500, bonding piece 600. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0022] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] As described in the background section, using pure steel tower structures to support wind turbines is problematic because steel towers are susceptible to corrosion when submerged in seawater. Therefore, the related technology has also proposed using pure FRP towers to support wind turbines. However, while pure FRP towers are corrosion-resistant, their modulus of elasticity is low, typically below 50 GPa, making it difficult to meet the bending resistance requirements of tall towers.

[0025] Related technologies also include steel-concrete hybrid towers, but the concrete section at the base still faces the risk of seepage corrosion. Furthermore, the concrete section, subjected to alternating wind and wave loads, often develops cracks exceeding 0.3 mm in width, accelerating chloride ion erosion. The overall structure of wind turbine towers can be referenced... Figure 1 The structure shown.

[0026] Reference Figure 2 As shown, a tower structure connection node for a deep-sea wind turbine according to an embodiment of the present invention includes a first pipe body 100, a first spiral component 200, a second pipe body 300, and a second spiral component 400.

[0027] One end of the first pipe body 100 is used to connect to the seabed foundation, and the other end of the first pipe body 100 is the connecting end; the first spiral component 200 is embedded in the first pipe body 100, the central axis of the first spiral component 200 is collinear with the central axis of the first pipe body 100, and the end of the first spiral component 200 extends out of the connecting end of the first pipe body 100; the second pipe body 300 is coaxial with the first pipe body 100, and the connecting end of the second pipe body 300 is connected to the first pipe body 100; the second spiral component 400 is embedded in the second pipe body 300, the central axis of the second spiral component 400 is collinear with the central axis of the second pipe body 300, the end of the second spiral component 400 extends out of the end of the second pipe body 300 facing the first pipe body 100, and the end of the second spiral component 400 is connected and fixedly joined with the end of the first spiral component 200.

[0028] The first pipe body 100 is embedded with a first spiral component 200, and the second pipe body 300 is embedded with a second spiral component 400. The first pipe body 100 and the second pipe body 300 are connected by the connection between the first spiral component 200 and the second spiral component 400. Offshore assembly does not require hydraulic tensioning equipment, reducing the construction time of a single tower section.

[0029] The second spiral component 400 is embedded in the second pipe body 300. The second spiral component 400 can be encased in concrete, which can also strengthen the concrete, improve the structural durability, and reduce the maximum crack width of the concrete. The embedding of both the first spiral component 200 and the second spiral component 400 can reduce the corrosion rate.

[0030] It is understood that the metal bundle 001 consists of multiple metal strips woven together, and the metal bundle 001 is spirally arranged to form a first spiral member 200 or a second spiral member 400.

[0031] The metal strips can be steel wires. Multiple steel wires are twisted and interwoven to form a metal bundle 001. The metal bundle 001 is then processed into a spiral shape, resulting in either the first spiral component 200 or the second spiral component 400. Taking the second spiral component 400 as an example, the use of twisted and interwoven steel wires increases the cross-sectional area of ​​the metal bundle 001. Furthermore, during concrete embedding, the concrete can penetrate into the interior of the metal bundle 001, effectively making the metal bundle 001 a skeleton of the concrete. This enhances tensile strength and reduces the width of concrete cracks under alternating wind and wave loads.

[0032] It is understood that the outer side of the metal tube bundle 001 is provided with threads, and the threads of the metal tube bundle 001 extend from the end face of the metal tube bundle 001 toward the other end. A fixing sleeve 500 is provided between the first helical member 200 and the second helical member 400. The inner wall of the fixing sleeve 500 is provided with threads, and the threads at both ends of the fixing sleeve 500 are in opposite directions. The threads of the first helical member 200 are engaged with the threads at one end of the fixing sleeve 500, and the threads of the second helical member 400 are engaged with the threads at the other end of the fixing sleeve 500.

[0033] Reference Figure 3 As shown, the threads at both ends of the fixing sleeve 500 are in opposite directions. When connecting and fixing with the first spiral member 200 and the second spiral member 400, the fixing sleeve 500 only needs to move to one side to simultaneously move both the first spiral member 200 and the second spiral member 400 towards the inside of the fixing sleeve 500, thus completing the docking and fixing. It should be understood that the outer side of the metal tube bundle 001 is threaded. Since the metal tube bundle 001 is made of interwoven steel wire, increasing the amount of steel wire forms a protrusion, which serves as the major diameter of the thread; the groove between adjacent protrusions serves as the minor diameter of the thread.

[0034] Understandably, the surface of the fixing sleeve 500 is provided with a through-hole for grouting. Modified epoxy resin can be injected into the inside of the fixing sleeve 500 through the grouting hole to further strengthen the connection between the first spiral member 200 and the second spiral member 400. Preferably, modified epoxy resin containing 0.6 wt% carbon nanotubes is injected through the grouting hole of the fixing sleeve 500 at a pressure of 0.8 MPa. Due to the addition of carbon nanotubes, the modified epoxy resin containing carbon nanotubes can conduct current. Applying a 24V DC current to it can heat the modified epoxy resin containing carbon nanotubes to 60°C for constant-temperature curing. After 30 minutes, a connection node with a tensile strength ≥205 MPa can be formed.

[0035] Reference Figure 4 As shown, it can be understood that the second tube body 300 includes an outer tube shell 310, an inner tube shell 320, and a filling layer 330. The inner tube shell 320 is inserted into the inner side of the outer tube shell 310, and the second spiral member 400 is fitted onto the outer side of the inner tube shell 320 and located between the outer tube shell 310 and the inner tube shell 320. The filling layer 330 is disposed between the outer tube shell 310 and the inner tube shell 320, and the filling layer 330 wraps around the second spiral member 400.

[0036] The filler layer 330 is preferably filled with concrete, such as steel fiber reinforced UHPC. UHPC refers to ultra-high performance concrete, a cement-based composite material characterized by ultra-high strength, high toughness, and high durability. It is composed of steel fibers, silica fume, etc., and its compressive strength can reach over 400 MPa. Preferably, both the outer shell 310 and the inner shell 320 can be made of FRP material. FRP is fiber-reinforced composite plastic, generally referring to reinforced plastics that use glass fibers to reinforce unsaturated polyester, epoxy resin, and phenolic resin matrices, with glass fibers or their products as reinforcing materials.

[0037] It is understood that the outer shell 310 includes an arc-shaped first segment 311 and an arc-shaped second segment 312, with the first segment 311 and the second segment 312 arranged opposite to each other and assembled to form the outer shell 310.

[0038] Disassembling the outer shell 310 into the first segment 311 and the second segment 312 facilitates processing, production, and subsequent installation. During the factory prefabrication stage, the first segment 311 and the second segment 312, with an arc of 180°, can be manufactured using a vacuum-assisted resin injection process.

[0039] Reference Figure 5As shown, it can be understood that the concave side of the first tube segment 311 and the concave side of the second tube segment 312 are provided with a number of shear keys 313. In the outer shell 310 where the first tube segment 311 and the second tube segment 312 are assembled, the multiple shear keys 313 are evenly distributed around the circumference of the outer shell 310. The outer side of the inner shell 320 is provided with a number of grooves 321, and the shear keys 313 can cooperate with the grooves 321.

[0040] When installing the first segment 311, the second segment 312, and the inner shell 320 at sea, precise positioning and prevention of secondary displacement can be achieved through the cooperation of the shear key 313 and the groove 321. Furthermore, a 2mm assembly gap can be formed between the shear key 313 and the groove 321, and the dimensions of the shear key 313 and the groove 321 can be determined before processing. Furthermore, an anti-slip strip can be inlaid on the outer side of the shear key 313; the surface of the strip has 0.5mm barbs. After the shear key 313 and the groove 321 are engaged, the anti-slip strip can provide a force of ≥10kN / m for anti-slip, ensuring as little displacement as possible during the hoisting process.

[0041] It should be understood that although the shear key 313 on the outer shell 310 needs to cooperate with the groove 321 on the inner shell 320, this structure will not interfere with the setting of the second spiral member 400. This is because there is a gap in the spiral structure of the second spiral member 400, and the shear key 313 can pass through the gap of the second spiral member 400 until it cooperates with the groove 321.

[0042] Reference Figure 6 As shown, it can be understood that the outer shell 310 is provided with a plurality of bonding pieces 600, the bonding pieces 600 are arranged along the splice seam of the first tube 311 and the second tube 312, and the bonding pieces 600 cover the splice seam of the first tube 311 and the second tube 312.

[0043] The bonding sheet 600 can also be made of FRP material. The bonding sheet 600 can be designed to be 300mm wide, which can cover the splicing seam between the first tube segment 311 and the second tube segment 312. The bonding sheet 600 can be equipped with embedded circuitry. After the bonding sheet 600 comes into contact with the outer shell 310, it is heated to 120℃ by applying 24V DC power and cured for 25 minutes to complete the connection.

[0044] An embodiment of the present invention provides a construction method for a tower structure connection node for a deep-sea wind turbine, which involves constructing the aforementioned tower structure connection node for a deep-sea wind turbine through the following steps. Step S1: Install the first pipe body. One end of the first pipe body is connected to the seabed foundation, and the other end of the first pipe body extends out of the sea surface. The first spiral component is exposed at the end of the first pipe body that extends out of the sea surface. Step S2: Hoist the second spiral component to connect with the first spiral component. Place a fixing sleeve between the second spiral component and the first spiral component. Insert one end of the first spiral component into one end of the fixing sleeve and the other end of the second spiral component into the other end of the fixing sleeve. Rotate the fixing sleeve to connect the first spiral component and the second spiral component. Step S3: Hoist the first segment and connect it with the first tube body, then hoist the inner shell and insert it from the center of the second spiral component, then hoist the second segment and connect it with the first tube body, and at the same time, the second segment and the first segment are assembled into the outer shell. Step S4: Pump concrete from the top sections of the inner and outer shells, and use a vibrator to vent the concrete to ensure that the concrete tightly wraps the second spiral component. After the concrete solidifies, the second pipe body is formed.

[0045] When connecting the first and second spiral components to the fixed sleeve, first hoist the second spiral component and rotate it so that its end is opposite to the end of the first spiral component. Then, place the fixed sleeve between the first and second spiral components, insert the end of the first spiral component into one end of the fixed sleeve, and place the end of the second spiral component into the other end of the fixed sleeve. While rotating the fixed sleeve, the second spiral component can also be rotated around its central axis, so that the end of the second spiral component moves toward the end of the first spiral component. This helps the ends of the first and second spiral components to move toward the center of the fixed sleeve to complete the connection.

[0046] Furthermore, it is understood that step S2 also includes injecting modified epoxy resin containing carbon nanotubes into the interior of the fixed sleeve through the grouting hole of the fixed sleeve, and then connecting a DC power supply for heating and constant temperature curing.

[0047] Modified epoxy resin containing carbon nanotubes (0.6 wt%) is injected through the grouting hole of the fixed sleeve at a pressure of 0.8 MPa. Then, 24 V DC is applied to heat it to 60 °C and maintain the temperature for 30 minutes to cure it. The resulting joint has a tensile strength ≥ 205 MPa.

[0048] In step S3, if the first segment is equipped with a shear key, the shear key needs to be passed through the gap in the second spiral component during the hoisting of the first segment. When hoisting the inner shell, the groove of the inner shell needs to be aligned with the shear key, and the inner shell lowered until the shear key engages with the groove. Finally, when hoisting the second segment, it is similarly ensured that the shear key passes through the gap in the second spiral component and engages with the groove. It should be understood that the first and second segments can be identical, named "first" and "second" only because of the order in which they are hoisted.

[0049] In step S4, the pumped concrete is steel fiber reinforced UHPC, forming a 500mm thick interlayer between the outer and inner shells. During pouring, it is injected in segments from the top of the outer and inner shells at a flow rate of ≤1m / min. Simultaneously, a 100Hz vibrator is inserted into the concrete to remove air. In the cross-sectional view of the outer and inner shells, the vibrator is inserted between adjacent shear keys to ensure the concrete slurry densely encapsulates the second spiral component.

[0050] The tower structure connection nodes for deep-sea wind turbines obtained using the above construction method can significantly reduce construction time compared to traditional structures and construction techniques. The construction time for a traditional single tower section is approximately 6.5 hours, which can be reduced to about 3.8 hours. The maximum crack width in the concrete layer structure located in the second pipe body is reduced to 0.07 mm, far smaller than the 0.3 mm of traditional concrete structures. Simultaneously, the corrosion rate of the first and second spiral components is also reduced to 0.0018 mm / year.

[0051] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A construction method for a tower structure connection node of a deep-sea wind turbine, characterized in that, The tower structure connection nodes to be constructed for deep-sea wind turbines include: The first pipe body (100) has one end for connecting to the seabed foundation and the other end for connecting. The first spiral component (200) is embedded in the first pipe body (100). The central axis of the first spiral component (200) is collinear with the central axis of the first pipe body (100). The end of the first spiral component (200) extends out of the connecting end of the first pipe body (100). The second tube (300) is coaxial with the first tube (100) and is connected to the connecting end of the first tube (100). The second tube (300) includes an outer shell (310), an inner shell (320), and a filling layer (330). The outer shell (310) includes an arc-shaped first tube segment (311) and an arc-shaped second tube segment (312). The first tube segment (311) and the second tube segment (312) are arranged opposite to each other and assembled to form the outer shell (310). The inner shell (320) is inserted into the inner side of the outer shell (310). The filling layer (330) is disposed between the outer shell (310) and the inner shell (320). The second spiral component (400) is fitted onto the outside of the inner tube shell (320) and located between the outer tube shell (310) and the inner tube shell (320). The filling layer (330) wraps the second spiral component (400). The central axis of the second spiral component (400) is collinear with the central axis of the second tube body (300). The end of the second spiral component (400) extends out of the end of the second tube body (300) facing the first tube body (100), and the end of the second spiral component (400) is connected to and fixedly joined with the end of the first spiral component (200). The tower structure connection nodes for the deep-sea wind turbine are constructed through the following steps; Step S1: Install the first pipe body. One end of the first pipe body is connected to the seabed foundation, and the other end of the first pipe body extends out of the sea surface. The first spiral component is exposed at the end of the first pipe body that extends out of the sea surface. Step S2: Hoist the second spiral component to connect with the first spiral component. Place a fixing sleeve between the second spiral component and the first spiral component. Insert one end of the first spiral component into one end of the fixing sleeve and the other end of the second spiral component into the other end of the fixing sleeve. Rotate the fixing sleeve to connect the first spiral component and the second spiral component. Step S3: Hoist the first tube segment and connect it with the first tube body, then hoist the inner tube shell and insert it from the center of the second spiral component, then hoist the second tube segment and connect it with the first tube body, and at the same time, the second tube segment and the first tube segment are assembled into the outer tube shell; Step S4: Pump concrete from the top sections of the inner and outer shells, and use a vibrator to vent the concrete to ensure that the concrete tightly wraps the second spiral component. After the concrete solidifies, the second pipe body is formed.

2. The construction method for the tower structure connection node of a deep-sea wind turbine according to claim 1, characterized in that, The surface of the fixed sleeve (500) is provided with a through grouting hole. In step S2, the modified epoxy resin containing carbon nanotubes is injected into the interior of the fixed sleeve through the grouting hole of the fixed sleeve, and then the DC power supply is turned on to heat and cure at a constant temperature.

3. The construction method for the tower structure connection node of a deep-sea wind turbine according to claim 1, characterized in that, The tower structure connection node for the deep-sea wind turbine also includes multiple metal strips, which are woven into a metal tube bundle (001). The metal tube bundle (001) is spirally arranged to form the first spiral member (200) or the second spiral member (400).

4. The construction method for the tower structure connection node of a deep-sea wind turbine according to claim 3, characterized in that, The outer side of the metal tube bundle (001) is provided with threads, and the threads of the metal tube bundle (001) extend from the end face of the metal tube bundle (001) toward the other end. A fixing sleeve (500) is provided between the first helical member (200) and the second helical member (400). The inner wall of the fixing sleeve (500) is provided with threads, and the threads at both ends of the fixing sleeve (500) are opposite in direction. The thread of the first helical member (200) is engaged with the thread at one end of the fixing sleeve (500), and the thread of the second helical member (400) is engaged with the thread at the other end of the fixing sleeve (500).

5. The construction method for the tower structure connection node of a deep-sea wind turbine according to claim 1, characterized in that, Both the concave side of the first tube segment (311) and the concave side of the second tube segment (312) are provided with a plurality of shear keys (313). In the outer shell (310) formed by the splicing of the first tube segment (311) and the second tube segment (312), the plurality of shear keys (313) are evenly spaced around the circumference of the outer shell (310). The outer side of the inner shell (320) is provided with a plurality of grooves (321), and the shear keys (313) can cooperate with the grooves (321).

6. The construction method for the tower structure connection node of a deep-sea wind turbine according to claim 1, characterized in that, The outer shell (310) is provided with a plurality of bonding pieces (600) on its outer side. The bonding pieces (600) are arranged along the splice seam of the first tube segment (311) and the second tube segment (312), and the bonding pieces (600) cover the splice seam of the first tube segment (311) and the second tube segment (312).

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