Single pile foundation inner platform bracket, offshore wind power single pile foundation and construction method

Abstract

The invention relates to the technical field of offshore wind power equipment, and discloses a single pile foundation inner platform bracket, an offshore wind power single pile foundation and a construction method.The single pile foundation inner platform bracket comprises a first supporting assembly and a second supporting assembly, and the first supporting assembly is suitable for being fixedly installed on the inner wall of a steel pipe pile; the second supporting assembly is suitable for being fixedly installed on the first supporting assembly after drilling construction is conducted in the steel pipe pile, and the width of the cross section of the second supporting assembly is larger than that of the cross section of the first supporting assembly. Due to the fact that the space occupied by the first supporting assembly in the steel pipe pile is small, the construction space in the steel pipe pile is large, drilling construction of a drilling machine in the steel pipe pile is not affected, and after drilling construction is completed, the second supporting assembly and the first supporting assembly are combined and installed, so that enough supporting capacity can be provided for the inner platform; the device has the advantages of convenience in manufacturing and processing, quickness in mounting, safety and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power equipment, and in particular to a platform bracket in a monopile foundation, an offshore wind power monopile foundation and a construction method. Background Art

[0002] The monopile foundation is a mainstream type of offshore wind turbine foundation, with the advantages of simple structure and fast construction speed. The inner platform of the monopile foundation is set inside the pile body, on which a variety of electrical equipment and monitoring equipment are placed. The inner platform structure of the foundation is mainly composed of supporting brackets and inner platform. Due to the difficulty and high cost of offshore construction, the inner platform of the foundation is usually prefabricated on shore and installed as a whole at sea. The inner platform brackets are evenly distributed on the inner wall of the pile body and welded to the pile body in the factory.

[0003] With the development of offshore wind power projects, the site conditions of the single pile foundation construction site have evolved from clay to rock foundation, and single pile rock-embedded construction is required. During construction, rock-embedded steel pipe piles are usually driven by hydraulic hammers to sink the steel pipe piles to a specific elevation, and a drilling rig is used to enter the steel pipe piles for drilling construction. For single pile foundations that cannot be sunk by hammering during the piling process, a drilling rig is required to dig and drive while driving. Pile analysis is performed before the steel pipe piles are made. If the inner diameter of the platform bracket formed by the foundation is smaller than the outer diameter of the drill bit equipment used, the drill bit cannot pass through, which increases the risk and difficulty of on-site construction operations and delays the construction cycle. If the bracket is welded on-site after the drilling work is completed, it will be difficult to install and position, and the quality of on-site welding is difficult to ensure. The inner platform bracket is a key component supporting the inner platform structure, which bears a large equipment load, and the inner platform of the foundation is the lowest platform structure inside the steel pipe pile. The lower part of its panel cannot be repaired and maintained during the service life of the wind turbine. The quality of the bracket construction and installation will affect the safety of the entire project. Summary of the invention

[0004] In view of this, the present invention provides a platform bracket in a single pile foundation, an offshore wind power single pile foundation and a construction method to solve the problem in the prior art that the bracket in the rock-embedded steel pipe pile is easy to affect the drilling rig construction inside the steel pipe pile.

[0005] In the first aspect, the present invention provides a single pile foundation inner platform corbel, comprising a first support assembly and a second support assembly, the first support assembly being suitable for being fixedly mounted on the inner wall of a steel pipe pile, the second support assembly being suitable for being fixedly mounted on the first support assembly after drilling construction in the steel pipe pile, the top of the second support assembly being suitable for installing an inner platform, the second support assembly being nested on the first support assembly in an "L" shape, and its cross-sectional width being greater than the cross-sectional width of the first support assembly.

[0006] Beneficial effect: The present invention prefabricates and installs the first support component in the inner wall of the steel pipe pile. When the steel pipe pile is embedded in the rock, the first support component occupies a smaller space in the steel pipe pile, and the construction space in the steel pipe pile is larger, which does not affect the drilling construction of the drilling rig inside the steel pipe pile. After the drilling construction is completed, the second support component is combined with the first support component to provide sufficient support capacity for the inner platform. It has the advantages of easy manufacturing and processing, fast installation, safety and reliability, and reduces the risk and difficulty of operation.

[0007] The present invention sets the second support assembly in an "L" shape. Under the load of the upper inner platform, the second support assembly can automatically press against the inner wall of the steel pipe pile and the end plate of the first support assembly. Since the inner platform is the bottom platform of the offshore wind turbine, the bracket structure cannot be repaired and maintained after the inner platform is installed. This nested connection method is safer and more reliable for the offshore wind turbine structure. It can effectively compensate for the impact of on-site welding and is easy to construct and manufacture. For the inner platform structure that bears a large load, the safety of the overall structure is improved.

[0008] In an optional embodiment, the inner platform corbel of the monopile foundation further includes a positioning assembly, which is disposed on top of the second supporting assembly and is suitable for limiting the position of the inner platform.

[0009] Beneficial effects: The present invention can provide positioning and guidance for the on-site installation of the inner platform by setting a positioning component, and can meet the needs of rapid installation of the inner platform at sea.

[0010] In an optional embodiment, the first support assembly includes:

[0011] A first vertical plate, the first vertical plate is vertically fixedly connected to the inner wall of the steel pipe pile;

[0012] A first top plate, which is horizontally arranged on the top of the first vertical plate and fixedly connected to the inner wall of the steel pipe pile;

[0013] The first side plate is vertically arranged on a side of the first vertical plate away from the inner wall of the steel pipe pile, and the first side plate is perpendicular to the first vertical plate and the first top plate.

[0014] In an optional embodiment, the second support assembly includes:

[0015] A second vertical plate, the second vertical plate is vertically fixedly connected to the inner wall of the steel pipe pile and the first support assembly, and the second vertical plate is located above the first support assembly;

[0016] The second top plate is horizontally arranged on the top of the second vertical plate and is fixedly connected to the inner wall of the steel pipe pile.

[0017] In an optional embodiment, the positioning component includes:

[0018] A first positioning member, two first positioning members are vertically arranged on the top of the second supporting assembly;

[0019] The second positioning member is arranged on the top of the second supporting assembly, and the second positioning member is located on a side away from the inner wall of the steel pipe pile, and a positioning space is formed between the first positioning member and the second positioning member.

[0020] In an optional implementation, the second positioning member is inclined toward the center of the steel pipe pile.

[0021] In a second aspect, the present invention further provides an offshore wind power monopile foundation, comprising:

[0022] Steel pipe piles, the interior of the steel pipe piles is hollow;

[0023] The above-mentioned single pile foundation inner platform bracket, multiple single pile foundation inner platform brackets are fixedly installed on the inner wall of the steel pipe pile;

[0024] Inner platform: The inner platform is fixedly installed on the top of the inner platform corbel of the monopile foundation.

[0025] In an optional embodiment, the inner platform includes:

[0026] Platform panels;

[0027] The platform beam body, the platform panel is arranged on the top of the platform beam body;

[0028] The platform base is arranged at the bottom of the platform beam body and is installed on the top of the second supporting assembly.

[0029] In an optional embodiment, the inner platform further comprises:

[0030] The platform limit block is arranged on the top of the second support assembly, and the platform base is in contact with the platform limit block.

[0031] In an optional embodiment, the platform beam is in the shape of a regular polygonal star, and each star angle position corresponds to a platform corbel in the monopile foundation.

[0032] In an optional embodiment, the inner platform further comprises:

[0033] Ring plate, the ring plate connects the platform panel and the inner wall of the steel pipe pile.

[0034] In an optional embodiment, the inner platform further comprises:

[0035] A seal is provided at the connection between the ring plate connecting the platform panel and the steel pipe pile.

[0036] In a third aspect, the present invention provides a method for constructing an offshore wind power monopile foundation, which is applied to the above-mentioned offshore wind power monopile foundation. The construction method comprises:

[0037] Cutting and respectively assembling the first supporting assembly and the second supporting assembly;

[0038] Installing the first support assembly in the steel pipe pile;

[0039] Transport the steel pipe piles to the sea area to be constructed;

[0040] Sink the steel pipe piles to a specific elevation;

[0041] Drill holes in the rock mass inside the steel pipe pile and sink the pile to the designated location;

[0042] Assembling the second support assembly with the first support assembly;

[0043] Hoist the inner platform, install the ring plate and seal the gaps. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 It is a front view of a platform bracket in a single pile foundation according to an embodiment of the present invention;

[0046] Figure 2 A side view of a platform corbel in a monopile foundation according to an embodiment of the present invention;

[0047] Figure 3 for Figure 1 Middle II section;

[0048] Figure 4 The figure is a top view of an offshore wind power monopile foundation according to an embodiment of the present invention.

[0049] Description of reference numerals:

[0050] 1. First support assembly; 110. First top plate; 120. First side plate; 130. First vertical plate;

[0051] 2. Second supporting assembly; 210. Second top plate; 220. Second vertical plate;

[0052] 3. Positioning assembly; 310. first positioning member; 320. second positioning member;

[0053] 4. Steel pipe piles;

[0054] 5. Inner platform; 501. Platform panel; 502. Platform beam; 503. Platform base; 504. Platform limit block; 505. Ring plate; 506. Manhole; 507. Support member;

[0055] 100. Platform corbel inside single pile foundation. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0057] Combine the following Figures 1 to 4 , describing an embodiment of the present invention.

[0058] According to an embodiment of the present invention, on the one hand, Figures 1 to 3 As shown, a single pile foundation inner platform corbel 100 is provided, comprising a first support assembly 1 and a second support assembly 2, wherein the first support assembly 1 is suitable for being fixedly mounted on the inner wall of a steel pipe pile 4, and the second support assembly 2 is suitable for being fixedly mounted on the first support assembly 1 after drilling construction in the steel pipe pile 4, and the top of the second support assembly 2 is suitable for mounting an inner platform 5, and the second support assembly 2 is nested on the first support assembly 1 in an "L" shape, and its cross-sectional width is greater than the cross-sectional width of the first support assembly 1.

[0059] Specifically, in this embodiment, the overall size of the first support component 1 is smaller than that of the second support component 2. The first support component 1 is welded and installed inside the steel pipe pile 4 in the production plant. Multiple first support components 1 are evenly arranged in a circumferential direction at the same height along the inner wall of the steel pipe pile 4. After the steel pipe pile 4 and the first support component 1 are installed, they are transported to the offshore wind turbine equipment construction site, and a hydraulic hammer is used to sink the steel pipe pile 4. When the steel pipe pile 4 is sunk to a specific elevation, a drilling rig is used to enter the steel pipe pile 4 for drilling construction. In this embodiment, after the first support component 1 is installed inside the steel pipe pile 4, the inner diameter size formed by the first support component 1 inside the steel pipe pile 4 is larger than the outer diameter of the drilling rig used, which can ensure that the drill bit of the drilling rig passes through the space enclosed between the first support components 1; when the drilling construction is completed, the second support component 2 is welded and installed on the top of the first support component 1 and the inner wall of the steel pipe pile 4.

[0060] In this embodiment, Figure 1 and Figure 2As shown, the cross section of the first support assembly 1 is approximately rectangular, and its side is welded to the inner wall of the steel pipe pile 4. The cross section of the second support assembly 2 is approximately inverted "L" shape, and its side is welded to the inner wall of the steel pipe pile 4. The first wall surface of its bottom is welded to the top of the first support assembly 1, and the second wall surface of its bottom is welded to the side of the first support assembly 1 away from the inner wall of the steel pipe pile 4. After the first support assembly 1 and the second support assembly 2 are installed as an integral structure, the inner platform 5 is installed on the top of the second support assembly 2.

[0061] The present invention prefabricates and installs the first support component 1 in the inner wall of the steel pipe pile 4. When the steel pipe pile 4 is embedded in the rock, the first support component 1 occupies a smaller space in the steel pipe pile 4, and the construction space in the steel pipe pile 4 is larger, which does not affect the drilling construction of the drilling rig inside the steel pipe pile 4. After the drilling construction is completed, the second support component 2 is combined with the first support component 1 to provide sufficient support capacity for the inner platform 5. It has the advantages of convenient manufacturing and processing, fast installation, safety and reliability, and reduces the risk and difficulty of operation.

[0062] The present invention sets the second support assembly 2 in an "L" shape. Under the load of the upper inner platform 5, the second support assembly 2 can automatically press against the inner wall of the steel pipe pile 4 and the end plate of the first support assembly 1. Since the inner platform 5 is the bottom platform of the offshore wind turbine, the bracket structure cannot be repaired and maintained after the inner platform 5 is installed. This nested connection method is safer and more reliable for the offshore wind turbine structure. It can effectively compensate for the impact of on-site welding and is easy to construct and manufacture. For the inner platform 5 structure that bears a large load, the safety of the overall structure is improved.

[0063] In one embodiment, Figure 1 As shown, the bracket of the inner platform 5 of the monopile foundation further includes a positioning component 3, which is arranged on the top of the second supporting component 2, and is suitable for limiting the position of the inner platform 5.

[0064] The present invention provides positioning and guidance for the on-site installation of the inner platform 5 by setting the positioning component 3, and can meet the demand for rapid installation of the inner platform 5 at sea.

[0065] In one embodiment, Figure 1 and Figure 2 As shown, the first supporting assembly 1 includes a first vertical plate 130, a first top plate 110 and a first side plate 120. The first vertical plate 130 is vertically fixedly connected to the inner wall of the steel pipe pile 4. The first top plate 110 is horizontally arranged on the top of the first vertical plate 130 and is fixedly connected to the inner wall of the steel pipe pile 4. The first side plate 120 is vertically arranged on the side of the first vertical plate 130 away from the inner wall of the steel pipe pile 4. The first side plate 120 is perpendicular to the first vertical plate 130 and the first top plate 110.

[0066] Specifically, in this embodiment, the first vertical plate 130 is trapezoidal, and chamfers are provided on both sides of the top of the first vertical plate 130. The first vertical plate 130 is vertically welded to the inner wall of the steel pipe pile 4. The first top plate 110 is rectangular, and the first top plate 110 is horizontally welded to the top of the first vertical plate 130 and is welded to the inner wall of the steel pipe pile 4. The first side plate 120 is rectangular, and the first side plate 120 is perpendicular to the first vertical plate 130 and the first top plate 110. The first side plate 120 is located at the bottom of the first top plate 110, and the first side plate 120 is welded to the first top plate 110 and the first vertical plate 130.

[0067] In this embodiment, the width of the first vertical plate 130 and the width of the first top plate 110 should meet the requirement that when the first support assembly 1 is installed on the inner wall of the steel pipe pile 4, the space formed between the multiple first support assemblies 1 is larger than the size of the drill bit of the drilling rig, so that the drill bit can drill holes in the space between the first support assemblies 1.

[0068] In one embodiment, Figure 1 and Figure 2 As shown, the second support assembly 2 includes a second vertical plate 220 and a second top plate 210. The second vertical plate 220 is vertically fixedly connected to the inner wall of the steel pipe pile 4 and the first support assembly 1. The second vertical plate 220 is located above the first support assembly 1. The second top plate 210 is horizontally arranged on the top of the second vertical plate 220 and is fixedly connected to the inner wall of the steel pipe pile 4.

[0069] Specifically, in this embodiment, the second vertical plate 220 is in an inverted "L" shape. When processing the second vertical plate 220, a rectangular opening can be processed at the left side below a rectangular steel plate, and a chamfer can be processed below the side away from the opening. The top of the rectangular opening is the first wall, and the side of the rectangular opening is the second wall. The dimensions of the first wall and the second wall match the first support assembly 1. The second vertical plate 220 is vertically connected to the first support assembly 1, and the second vertical plate 220 is welded to the steel pipe pile 4 on one side close to the inner wall of the steel pipe pile 4.

[0070] In this embodiment, the second top plate 210 is approximately trapezoidal, and its long side matches the arc surface of the inner wall of the steel pipe pile 4 . The second top plate 210 is horizontally welded to the top of the second vertical plate 220 .

[0071] In one embodiment, Figure 1 and Figure 3 As shown, the positioning assembly 3 includes a first positioning member 310 and a second positioning member 320. The two first positioning members 310 are vertically arranged on the top of the second support assembly 2, and the second positioning member 320 is arranged on the top of the second support assembly 2. The second positioning member 320 is located on the side away from the inner wall of the steel pipe pile 4, and a positioning space is formed between the first positioning member 310 and the second positioning member 320.

[0072] Specifically, in this embodiment, the first positioning member 310 is trapezoidal, and two first positioning members 310 are welded vertically and parallel to the top of the second vertical plate 220, and the side of the first positioning member 310 is welded to the inner wall of the steel pipe pile 4. A positioning space is formed between the two first positioning members 310 and the second positioning member 320, and the positioning space is used to position and install the inner platform 5.

[0073] In one embodiment, Figure 1 and Figure 3 As shown, the second positioning member 320 is inclined toward the center of the steel pipe pile 4 .

[0074] Specifically, in this embodiment, the second positioning member 320 can be made of angle steel, and the second positioning member 320 is installed on the center line between the two first positioning members, and the second positioning member 320 is inclined toward the center direction of the steel pipe pile 4.

[0075] According to an embodiment of the present invention, on the other hand, Figure 1 and Figure 4 As shown, an offshore wind power monopile foundation is also provided, including a steel pipe pile 4, the above-mentioned monopile foundation inner platform bracket 100 and an inner platform 5, the interior of the steel pipe pile 4 is a cavity, a plurality of monopile foundation inner platform brackets 100 are fixedly installed on the inner wall of the steel pipe pile 4, and the inner platform 5 is fixedly installed on the top of the monopile foundation inner platform 5 bracket.

[0076] In one embodiment, Figure 1 and Figure 4 As shown, the inner platform 5 includes a platform panel 501, a platform beam 502 and a platform base 503, the platform panel 501 is arranged on the top of the platform beam 502, the platform base 503 is arranged on the bottom of the platform beam 502, and the platform base 503 is installed on the top of the second support assembly 2.

[0077] Specifically, in this embodiment, to facilitate the installation of the inner platform 5, the circumferential dimension of the inner platform 5 is not larger than the inner diameter dimension of the steel pipe pile 4, and multiple platform bases 503 are correspondingly installed on the top of each second top plate 210, and the platform beam 502 is installed on multiple platform bases 503. In this embodiment, the platform beam 502 is a frame structure formed by welding a combination of steel sections, and the platform panel 501 is installed on the top of the platform beam 502. The platform panel 501 is used to install and place various electrical and monitoring equipment.

[0078] In this embodiment, a manhole 506 is provided on the platform panel 501 to facilitate maintenance personnel to enter the inner platform 5 for maintenance and inspection.

[0079] Under the load of the upper inner platform 5, the second support assembly 2 can automatically press against the inner wall of the steel pipe pile 4 and the end plate of the first support assembly 1. Since the inner platform 5 is the bottom platform of the offshore wind turbine, the bracket structure cannot be repaired and maintained after the inner platform 5 is installed. This nested connection method is safer and more reliable for the offshore wind turbine structure. It can effectively compensate for the impact of on-site welding and is easy to construct and manufacture. For the inner platform 5 structure that bears a large load, the safety of the overall structure is improved.

[0080] In one embodiment, the inner platform 5 further includes a platform limit block 504 . The platform limit block 504 is disposed on the top of the second supporting assembly 2 , and the platform base 503 abuts against the platform limit block 504 .

[0081] Specifically, in this embodiment, after the inner platform 5 is hoisted on the top of the second top plate 210, a platform limit block 504 is welded on the top of the second top plate 210, and the platform limit block 504 abuts against the side of the platform base 503 close to the steel pipe pile 4 to prevent the platform base 503 from being displaced on the second top plate 210.

[0082] In one embodiment, Figure 4 As shown, the platform beam 502 is in the shape of a regular polygonal star, and each star angle position corresponds to the platform corbel 100 in the monopile foundation.

[0083] Specifically, in this embodiment, the number of star angles in the regular polygonal star-shaped platform beam body 502 matches the number of platform brackets 100 in the single pile foundation, and the platform base 503 at the bottom of each star angle is installed on the corresponding second top plate 210. In this embodiment, the platform beam body 502 is a regular octagonal star, and the platform beam body 502 is provided with eight star angles in total, and eight platform brackets 100 in the single pile foundation are correspondingly arranged in the steel pipe pile 4.

[0084] In this embodiment, the regular octagonal star-shaped platform beam 502 is a triangle arranged in the middle of each of the four sides of a square frame structure. The four triangle structures are the same as the structures of the four corners of the square. The four triangles and the four corners of the square together constitute the eight corners of the regular octagonal star. Each corner of the star is a hollow triangle structure composed of two steel sections, such as Figure 3 As shown, the hollow triangle structure is installed in the positioning space. The platform beam body 502 adopting the regular octagonal star frame structure has a stable structure and light weight, and cooperates with the second positioning member 320 to facilitate accurate positioning and installation, thereby improving construction efficiency.

[0085] In an optional embodiment, if Figure 1 and Figure 4 As shown, the inner platform 5 further includes an annular plate 505 , which connects the platform panel 501 and the inner wall of the steel pipe pile 4 .

[0086] Specifically, in this embodiment, the circumferential dimension of the platform panel 501 is smaller than the inner diameter dimension of the steel pipe pile 4. When the inner platform 5 is firmly installed, there is a gap between the platform panel 501 and the steel pipe pile 4. A support member 507 is installed at the bottom of the outer edge of the platform panel 501, and the ring plate 505 is installed on the top of the support member 507 and the first positioning member 310.

[0087] In one embodiment, the inner platform 5 further includes a seal, which is arranged at the connection between the ring plate 505 and the platform panel 501 and the steel pipe pile 4 .

[0088] Specifically, after the ring plate 505 is installed in this embodiment, a seal is provided in the gap between the ring plate 505 and the platform panel 501 and the steel pipe pile 4. In this embodiment, a salt spray resistant sealant is used for sealing, thereby increasing the sealing between the ring plate 505 and the platform panel 501 and the steel pipe pile 4.

[0089] According to an embodiment of the present invention, on the other hand, a method for constructing an offshore wind power monopile foundation is provided, which is applied to the above-mentioned offshore wind power monopile foundation. The construction method comprises:

[0090] Cutting and assembling the first support assembly 1 and the second support assembly 2 respectively;

[0091] Install the first support assembly 1 in the steel pipe pile 4;

[0092] Transporting the steel pipe piles 4 to the sea area to be constructed;

[0093] Sinking the steel pipe pile 4 to a specific elevation;

[0094] Drill holes in the rock mass within the steel pipe pile 4 and sink the pile to a designated position;

[0095] Assemble the second support assembly 2 with the first support assembly 1;

[0096] The inner platform 5 is hoisted, the ring plate 505 is installed and the gaps are sealed.

[0097] Specifically, the offshore wind power monopile foundation construction method in this embodiment is:

[0098] First, the parts of the first support assembly 1 and the second support assembly 2 are cut in the production workshop, and assembled and welded into the first support assembly 1 and the second support assembly 2 respectively; then the first support assembly 1 is installed on the inner wall of the steel pipe pile 4; then the steel pipe pile 4 welded with the first support assembly 1 is transported to the sea area to be constructed; then the steel pipe pile 4 is sunk to a specific elevation by hammering; then the drilling rig is hoisted into the steel pipe pile 4 and installed on the first support assembly 1, and a hole is drilled on the rock mass in the steel pipe pile 4 by the drilling rig, and the waste generated by the drilling is removed, and the steel pipe pile 4 is sunk to the specified position by hammering again; after the sinking is completed, the second support assembly 2 is assembled with the first support assembly 1 and welded firmly; finally, the inner platform 5 is hoisted, the platform limit block 504 is welded and installed, the ring plate 505 is installed, and the gap is sealed.

[0099] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A platform bracket in a single pile foundation, characterized in that: include: A first support assembly (1), the first support assembly (1) being suitable for being fixedly mounted on the inner wall of the steel pipe pile (4); A second support component (2), the second support component (2) is suitable for being fixedly installed on the first support component (1) after drilling holes in the steel pipe pile (4), the top of the second support component (2) is suitable for installing an inner platform (5), the second support component (2) is nested in the first support component (1) in an "L" shape, and its cross-sectional width is greater than the cross-sectional width of the first support component (1).

2. The inner platform bracket of the monopile foundation according to claim 1, characterized in that: Also includes: A positioning component (3), wherein the positioning component (3) is arranged on the top of the second supporting component (2), and the positioning component (3) is suitable for limiting the position of the inner platform (5).

3. The inner platform bracket of the monopile foundation according to claim 1 or 2, characterized in that: The first supporting assembly (1) comprises: A first vertical plate (130), the first vertical plate (130) being vertically fixedly connected to the inner wall of the steel pipe pile (4); A first top plate (110), the first top plate (110) being horizontally arranged on the top of the first vertical plate (130) and fixedly connected to the inner wall of the steel pipe pile (4); A first side plate (120), wherein the first side plate (120) is vertically arranged on a side of the first vertical plate (130) away from the inner wall of the steel pipe pile (4), and the first side plate (120) is perpendicular to the first vertical plate (130) and the first top plate (110).

4. The inner platform bracket of the monopile foundation according to claim 1, characterized in that: The second supporting assembly (2) comprises: A second vertical plate (220), the second vertical plate (220) being vertically fixedly connected to the inner wall of the steel pipe pile (4) and the first supporting assembly (1), and the second vertical plate (220) being located above the first supporting assembly (1); A second top plate (210), wherein the second top plate (210) is horizontally arranged on the top of the second vertical plate (220) and is fixedly connected to the inner wall of the steel pipe pile (4).

5. The inner platform bracket of the monopile foundation according to claim 2, characterized in that: The positioning component (3) comprises: A first positioning member (310), wherein two first positioning members (310) are vertically arranged on the top of the second supporting assembly (2); A second positioning member (320), wherein the second positioning member (320) is arranged on the top of the second supporting assembly (2), the second positioning member (320) is located on a side away from the inner wall of the steel pipe pile (4), and a positioning space is formed between the first positioning member (310) and the second positioning member (320).

6. The inner platform bracket of the monopile foundation according to claim 5, characterized in that: The second positioning member (320) is inclined toward the center direction of the steel pipe pile (4).

7. An offshore wind power monopile foundation, characterized in that: include: A steel pipe pile (4), wherein the interior of the steel pipe pile (4) is a hollow cavity; The monopile foundation inner platform bracket (100) according to any one of claims 1 to 6, wherein a plurality of the monopile foundation inner platform brackets (100) are fixedly mounted on the inner wall of the steel pipe pile (4); The inner platform (5) is fixedly mounted on the top of the bracket of the inner platform (5) of the monopile foundation.

8. The offshore wind power monopile foundation according to claim 7, characterized in that: The inner platform (5) comprises: Platform panel (501); A platform beam body (502), wherein the platform panel (501) is arranged on the top of the platform beam body (502); A platform base (503), wherein the platform base (503) is arranged at the bottom of the platform beam body (502), and the platform base (503) is installed on the top of the second supporting assembly (2).

9. The offshore wind power monopile foundation according to claim 8, characterized in that: The inner platform (5) further comprises: A platform limit block (504), wherein the platform limit block (504) is arranged on the top of the second support assembly (2), and the platform base (503) is in abutment with the platform limit block (504).

10. The offshore wind power monopile foundation according to claim 8 or 9, characterized in that: The platform beam body (502) is in the shape of a regular polygonal star, and each star angle position corresponds to the platform corbel (100) in the single pile foundation.

11. The offshore wind power monopile foundation according to claim 8, characterized in that: The inner platform (5) further comprises: A ring plate (505), wherein the ring plate (505) connects the platform panel (501) and the inner wall of the steel pipe pile (4).

12. The offshore wind power monopile foundation according to claim 11, characterized in that: The inner platform (5) further comprises: A sealing member is provided at a connection point where the ring plate (505) connects the platform panel (501) and the steel pipe pile (4).

13. A method for constructing an offshore wind power monopile foundation, characterized in that: The offshore wind power monopile foundation applied to any one of claims 7 to 12, the construction method comprising: Cutting and respectively assembling the first support assembly (1) and the second support assembly (2); Installing the first support assembly (1) in the steel pipe pile (4); Transporting the steel pipe piles (4) to the sea area to be constructed; sinking the steel pipe pile (4) to a specific elevation; Drilling holes in the rock mass within the steel pipe pile (4) and sinking the pile to a designated position; Assembling the second support assembly (2) with the first support assembly (1); The inner platform (5) is hoisted, the ring plate (505) is installed and the gap is sealed.

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