Triangular steel-concrete combined structure floating platform and construction method thereof

Abstract

The application discloses a triangular steel-concrete combined structure floating platform and a construction method thereof, and belongs to the technical field of floating platforms. The floating platform comprises a floating platform and a float. The floating platform comprises a bending piece, two extension pieces and a connecting piece. The end portions of the two extension pieces are mounted on the bending piece. The extension piece comprises a plurality of connecting cylinder sections which are sequentially spliced in the front and rear. The connecting cylinder sections of one extension piece are connected through steel strands. The float is provided with a plurality of floating platforms. Each floating platform is fixedly arranged on the top of the two extension pieces. One of the floating platforms is used for being connected with a fan. The connecting piece is used for connecting the connecting cylinder sections of the two extension pieces which are away from the bending piece. The application has the effect of facilitating the installation of fans with different sizes or weights and improving the applicability.

Description

Technical Field

[0001] This invention relates to the field of floating platforms, and in particular to a triangular steel-concrete composite structure floating platform and its construction method. Background Technology

[0002] A steel-concrete composite floating platform refers to a floating platform constructed from both steel and concrete. This type of platform combines the high strength and durability of steel with the load-bearing capacity and stability of concrete, resulting in enhanced seismic resistance and durability.

[0003] A steel-concrete composite floating platform for providing buoyancy and stability to a wind turbine unit includes a floating platform and pontoons. The floating platform is arranged in a triangular shape with an integral structure. Multiple pontoons are provided and are all fixedly installed on the top of the floating platform. One of the pontoons is used to connect to the wind turbine.

[0004] Regarding the existing technologies mentioned above, the fixed dimensions of the triangular integrated floating platform structure make it difficult to adapt to the installation of fans of different sizes or weights, resulting in poor applicability. Summary of the Invention

[0005] To facilitate adaptation to the installation of fans of different sizes or weights and improve applicability, this application provides a triangular steel-concrete composite structure floating platform.

[0006] This application provides a triangular steel-concrete composite structure floating platform, which adopts the following technical solution:

[0007] A triangular steel-concrete composite floating platform includes a floating platform and pontoons. The floating platform includes a bent component, two extension components, and a connecting component. One end of each of the two extension components is installed on the bent component. Each extension component includes multiple connecting cylindrical sections that are sequentially spliced ​​end to end. The connecting cylindrical sections of the extension components are connected by steel strands. Multiple pontoons are provided, and each pontoon is fixedly installed on the top of the floating platform. One of the pontoons is used to connect to a wind turbine. The connecting component is used to connect the connecting cylindrical sections of the two extension components that are away from the bent component.

[0008] By adopting the above technical solution, the dimensions of the floating platform can be adjusted by connecting different numbers of connecting cylinder sections and connecting the connecting cylinder sections of the two extensions away from the bending parts through connecting parts. This facilitates the adjustment of the buoyancy of the floating platform as a whole, allowing the float to adapt to the installation of fans of different sizes or weights, which is beneficial to improving applicability. In addition, the setting of connecting cylinder sections to form extensions by assembling steel strands facilitates the transportation of the floating platform and the rapid production of various components of the floating platform.

[0009] Optionally, a first flange is fixedly installed on the end of the connecting cylinder section near the bending member of the extension, and a second flange is fixedly installed on the end of the bending member near the extension. The first flange and the second flange are fixed together by welding.

[0010] By adopting the above technical solution, the connection between the extension and the bending parts is reliable and stable through welding and fixing of the first and second flanges, which helps to ensure the overall structural stability of the platform.

[0011] Optionally, each of the connecting cylinder sections is provided with circumferentially distributed and through-holes. The first flange has a first groove arranged in a ring on the side facing the second flange. The first groove is provided with a clearance hole that corresponds to and passes through the connecting holes. Both the connecting holes and the clearance holes are used for steel strands to pass through. One end of the steel strand is fixed in the first groove by an anchor plate.

[0012] By adopting the above technical solution, the setting of the anchor plate helps to ensure the stability of the position of the steel strand after it is connected to each connecting cylinder section. In addition, fixing one section of the steel strand between the first flange and the second flange facilitates the concealment and protection of the steel strand, making the steel strand less susceptible to water immersion and corrosion, and thus helping to ensure the service life of the steel strand.

[0013] Optionally, the first groove is provided with a plurality of circumferentially distributed first reinforcing ribs, and the second flange has a ring-shaped second groove on the side facing the first flange, and the second groove is provided with a plurality of circumferentially distributed second reinforcing ribs.

[0014] By adopting the above technical solution, the arrangement of the first reinforcing rib and the second reinforcing rib helps to ensure the structural strength of the first flange and the second flange, and thus helps to enhance the structural strength and fatigue resistance of the joint coupling.

[0015] Optionally, when the first flange and the second flange are welded together, the first groove and the second groove are connected and grout is injected.

[0016] By adopting the above technical solution, the grouting arrangement between the first flange and the second flange helps to further ensure the connection strength between the first flange and the second flange.

[0017] Optionally, the connecting cylinder section is provided with a water storage cavity, and two connecting partitions are fixedly installed in the water storage cavity. Both connecting partitions are arranged along the length direction of the extension and divide the water storage cavity into three partition cavities. At least two of the partition cavities are provided with water inlet holes and water outlet holes that communicate with the outside.

[0018] By adopting the above technical solution, water can be injected into different partition cavities of the water storage cavity to facilitate the adjustment of the overall diving depth of the platform, thereby adapting to different installation conditions. At the same time, in the face of different weather conditions, injecting different amounts of water into different partition cavities can facilitate the adjustment of the tilt of the extension components, which helps to further ensure the overall stability of the floating platform's location.

[0019] Optionally, a sealing gasket is fixedly provided between two adjacent connecting sections of the extension.

[0020] By adopting the above technical solution, the sealing gasket facilitates the isolation of moisture inside and outside the connecting cylinder, which helps to ensure the overall stability of the connecting cylinder after water is stored.

[0021] Optionally, the float includes an installation cylinder and a fixed cylinder. The installation cylinder is fixedly installed on the top of the bent component. There are two fixed cylinders, which are respectively fixedly installed on the top of the two extensions and located at the free ends of the two extensions away from the bent component. The distances from the two fixed cylinders to the installation cylinder are equal. The installation cylinder is used to install the fan. The connecting component includes a connecting beam and reinforcing rods. The two ends of the connecting beam are respectively fixedly installed on the two fixed cylinders. There are two reinforcing rods. One end of each reinforcing rod is fixedly connected to the two floats, and the other end is fixedly connected to the connecting beam.

[0022] By adopting the above technical solution, the setting of the fixed cylinder is conducive to ensuring the stability of the overall position of the platform after the wind turbine is installed. The setting of the connecting beam and the reinforcing rod is conducive to further enhancing the connection stability between the two fixed cylinders, and on the other hand, it is convenient to drag the entire platform on the sea surface by pulling the connecting beam.

[0023] Optionally, the connector includes two bent portions and an extension portion. The two ends of the extension portion are respectively connected to the two bent portions, and the other ends of the two bent portions are respectively connected to the ends of the two extension portions away from the bent portions. The extension portion includes multiple connecting cylinders that are spliced ​​together end to end, and each connecting cylinder of the extension portion is connected by steel strands.

[0024] By adopting the above technical solutions, the overall stress distribution of the platform is made more uniform, making it easier to withstand more extreme loads and stresses in the marine environment and more stably support the wind turbine.

[0025] Secondly, this application provides a construction method for a triangular steel-concrete composite structure floating platform, employing the following technical solution: Based on the aforementioned triangular steel-concrete composite structure floating platform, the method includes the following specific steps: S1, prefabricated connecting cylinder sections are sequentially spliced ​​end-to-end and connected by steel strands to achieve the splicing and forming of the extension sections; S2, the ends of the steel strands connecting each connecting cylinder section are fixed by anchor plates to ensure the overall stability of the spliced ​​extension sections; S3, the two spliced ​​extension sections are respectively fixedly installed at both ends of the bent section by flanges; S4, the connecting piece is installed between the two extension sections; S5, the fan is installed on one of the floating cylinders by steel strands and bolts.

[0026] By adopting the above technical solution, the length of the extension can be adjusted by connecting different numbers of connecting cylinder sections during the splicing process, which means adjusting the size of the floating platform structure. This facilitates the adjustment of the buoyancy of the entire floating platform, allowing the pontoon to adapt to the installation of fans of different sizes or weights, thus improving its applicability. In addition, the arrangement of connecting cylinder sections to form the extension facilitates the transportation of the floating platform and the rapid production of various components of the floating platform.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By connecting different numbers of connecting cylinder sections and connecting the connecting cylinder sections of the two extensions away from the bending parts through connectors, the structural dimensions of the floating platform can be adjusted. This facilitates the adjustment of the buoyancy of the entire floating platform, allowing the float to adapt to the installation of fans of different sizes or weights, thus improving its applicability.

[0029] 2. The anchor plate helps ensure the stability of the position of the steel strand after it is connected to each connecting section. The setting of fixing one section of the steel strand between the first flange and the second flange facilitates the concealment and protection of the steel strand, making it less susceptible to water immersion and corrosion, and thus helping to ensure the service life of the steel strand.

[0030] 3. Injecting water into different compartments of the water storage cavity facilitates the adjustment of the overall diving depth of the platform, thereby adapting to different installation conditions. At the same time, in response to different weather conditions, injecting different amounts of water into different compartments allows for the adjustment of the tilt of the extension components, which helps to further ensure the overall stability of the floating platform's location. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0032] Figure 2 This is an exploded view of the connection structure between the bent part and the extension part in Embodiment 1 of this application.

[0033] Figure 3 yes Figure 2 A magnified view of part A in the diagram.

[0034] Figure 4 This is a schematic diagram of the bending component in Embodiment 1 of this application.

[0035] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Bending component; 101. Bending section; 2. Extension component; 201. Connecting cylinder section; 3. Connecting component; 301. Connecting crossbeam; 302. Reinforcing rod; 303. Bending part; 304. Extension part; 3041. Connecting cylinder body; 4. Water storage cavity; 401. Partition cavity; 5. Connecting partition plate; 6. Water inlet; 7. Water outlet; 8. Sealing gasket; 9. Partition; 10. First flange; 11. Second flange; 12. First groove; 13. 14. First reinforcing rib; 15. Second groove; 16. Second reinforcing rib; 17. Connecting rib; 18. Connecting hole; 19. Alternating hole; 10. Anchor plate; 191. Pad body; 192. Clamp; 1921. Clamping part; 1922. Limiting spring; 20. Through hole; 21. Locking groove; 22. Placement groove; 23. Cover; 24. Mounting cylinder; 25. Fixing cylinder; 26. Fan; 261. Support part; 27. Stop part. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0039] Example 1.

[0040] This application discloses a triangular steel-concrete composite structure floating platform.

[0041] Reference Figure 1 The triangular steel-concrete composite floating platform includes a bending component 1, two extension components 2, and a connecting component 3. The bending component 1 is made of high-strength structural steel to give it excellent properties such as fatigue resistance, bending moment resistance, shear resistance, and corrosion resistance. The bending component 1 includes two integrally fixedly connected bending sections 101 with an included angle of 60 degrees between them. That is, the cross-section of the bending component 1 is roughly "V" shaped. The two extension components 2 are respectively connected to the ends of the two bending sections 101.

[0042] Reference Figure 1 and Figure 2The extension component 2 comprises multiple connecting cylindrical sections 201 joined end-to-end. Each connecting cylindrical section 201 is connected by steel strands. Specifically, the connecting cylindrical sections 201 are made of UHPC ultra-high performance concrete. The cross-section of each connecting cylindrical section 201 is annular, with both its top and bottom surfaces being flat, while both sides are curved to facilitate better stress distribution and provide greater stability when used as a floating platform to support structures such as the wind turbine 26. The flat top of the connecting cylindrical section 201 facilitates easier placement and support of the structure, while the flat bottom provides better support and stable buoyancy.

[0043] Reference Figure 2 and Figure 3 A water storage cavity 4 is provided through the end of the connecting cylinder 201 along its own length direction. Two vertically arranged connecting partitions 5 are fixedly installed in the water storage cavity 4. The two sides of the vertical direction of the connecting partitions 5 are respectively fixedly connected to the two cavity walls of the water storage cavity 4. Both connecting partitions 5 are arranged along the length direction of the extension 2 and are the same length as the connecting cylinder 201, so that the connecting partitions 5 divide the water storage cavity 4 into three partition cavities 401. Specifically, the partition cavities 401 near the two sides of the connecting cylinder 201 are set as ballast cavities, and the partition cavities 401 near the middle of the connecting cylinder 201 can be set as either ballast cavities or pedestrian cavities, which can be adapted according to actual needs. In the embodiment of this application, all three partition cavities 401 are set as ballast cavities.

[0044] Continue to refer to Figure 2 and Figure 3 Each partition cavity 401, i.e., each ballast cavity, is equipped with an inlet hole 6 and an outlet hole 7 that communicate with the outside. When the partition cavity 401 located in the middle of the connecting cylinder section 201 is designated as a passageway, the inlet hole 6 and outlet hole 7 are not provided in the passageway. Water is synchronously injected into the different partition cavities 401 of the water storage cavity 4 by a pump to adjust the overall diving depth of the platform, thereby adapting to different installation conditions. At the same time, in the face of different weather conditions, different amounts of water are injected into different partition cavities 401 by a pump or water is discharged from different partition cavities 401 by a pump to adjust the tilt of the extension 2, which helps to further ensure the overall stability of the floating platform's position.

[0045] Reference Figure 2 and Figure 4To facilitate the isolation of moisture inside and outside the connecting cylinder section 201 and thus ensure the overall stability of the connecting cylinder section 201 after water storage, a sealing gasket 8 is fixedly fitted onto the outer circumferential surface of one connecting cylinder section 201 facing the other connecting cylinder section 201. A partition 9 is fixedly provided on the inner side of the sealing gasket 8. When the two connecting cylinder sections 201 are connected, the two connecting cylinder sections 201 are respectively pressed against the two sides of the partition 9, and the inner side of the sealing gasket 8 is respectively pressed against the two connecting cylinder sections 201, so as to fully ensure the sealing stability between the two connecting cylinder sections 201 after connection. Both bent sections 101 of the bent member 1 are fixedly provided with a stop part 27. The stop part 27 closes the opening at one end of each partition cavity 401 to achieve stable separation of each partition cavity 401 of the two extension members 2.

[0046] Reference Figure 2 and Figure 3 To facilitate a stable connection between the bent part 1 and the extension part 2, the end of the extension part 2 near the connecting cylinder section 201 of the bent part 1 is fixedly installed with a first flange 10 by an anchor plate 19 and a steel strand. The end of the bent section 101 of the bent part 1 near the extension part 2 is fixedly installed with a second flange 11 by welding or bolts. The first flange 10 and the second flange 11 are fixed by welding.

[0047] Reference Figure 2 The first flange 10 has a first groove 12 arranged in a ring on the side facing the second flange 11. Multiple circumferentially evenly distributed first reinforcing ribs 13 are fixedly arranged in the first groove 12. The second flange 11 has a second groove 14 arranged in a ring on the side facing the first flange 10. Multiple circumferentially evenly distributed second reinforcing ribs 15 are fixedly arranged in the second groove 14 to ensure the structural stability of the first flange 10 and the second flange 11.

[0048] Continue to refer to Figure 2 Multiple circumferentially distributed reinforcing ribs 16 are fixedly connected to the side of the second flange 11 away from the first flange 10, which helps to further ensure the structural strength of the second flange 11. After the first flange 10 and the second flange 11 are welded and fixed, the first groove 12 and the second groove 14 are connected. By injecting grout into the first groove 12, UHPC ultra-high performance concrete can be used as the grouting material in this embodiment. After the grout solidifies, a grouting layer is formed in the first groove 12 and the second groove 14, which helps to further ensure the connection stability between the first flange 10 and the second flange 11.

[0049] Reference Figure 2 and Figure 3Both the connecting cylinder section 201 and each connecting partition plate 5 have connecting holes 17 that extend along their own length. The connecting holes 17 on the connecting cylinder section 201 are evenly distributed circumferentially, while the connecting holes 17 on the connecting partition plate 5 are evenly distributed along the length of their respective surfaces. The bottom wall of the first groove 12 has clearance holes 18 that correspond one-to-one with each connecting hole 17 and extend through it. Both the connecting holes 17 and the clearance holes 18 are used for steel strands to pass through, so that the connection stability between each connecting cylinder section 201 can be fully guaranteed by the arrangement of multiple sets of steel strands.

[0050] Continue to refer to Figure 2 and Figure 3 Specifically, the anchor plate 19 at one end of each steel strand is located within the first groove 12 to conceal and protect the steel strand, preventing water immersion and corrosion and ensuring its service life. Further, the anchor plate 19 includes a plate body 191 and a clamp 192. The plate body 191 has through holes 20 for the steel strand to pass through. In this embodiment, two through holes 20 are provided, and two clamps 192 are provided corresponding to each through hole 20.

[0051] Reference Figure 1 and Figure 3 The clamp 192 includes two clamping parts 1921 and a limiting spring 1922. Each clamping part 1921 has a recessed slot 21 on its opposite side, adapted to the shape of the steel strand. The limiting spring 1922 is arranged in a closed ring shape, fitted onto the outer circumference of the two clamping parts 1921. To ensure the stability of the limiting spring 1922's position, the outer circumference of the two clamping parts 1921 has a placement slot 22 for placing the limiting spring 1922. Under the elastic force of the limiting spring 1922, the two clamping parts 1921 achieve compression and positioning of the steel strand. Both clamping parts 1921 are inserted into the through hole 20, and the cross-sectional dimensions of the two clamping parts 1921 gradually increase from the direction near the opening of the through hole 20 to the direction away from the opening of the through hole 20, to fully ensure the stability of the two clamping parts 1921 in compressing and positioning the steel strand. Both extensions 2 are provided with caps 23 at the ends of the connecting cylinder sections 201 away from the bending member 1. The connection method between the caps 23 and the connecting cylinder section 201 is the same as the connection method between the connecting cylinder section 201 and the bending member 1. Both are fixed by the first flange 10 and the second flange 11, which will not be described in detail here. The caps 23 are mainly used to achieve stable closure of the opening at the end of the connecting cylinder section 201.

[0052] Reference Figure 1In this embodiment, three floats are provided. Specifically, the floats include an installation cylinder 24 and a fixed cylinder 25. The installation cylinder 24 is vertically fixedly installed on the top of the bent member 1. There are two fixed cylinders 25, which are respectively fixedly installed on the top of the two connecting cylinder sections 201 of the two extension members 2 away from the bent member 1. The distances from the two fixed cylinders 25 to the installation cylinder 24 are equal. The installation cylinder 24 is used to install the fan 26. Specifically, the support part of the fan 26 is spliced ​​from multiple support sections 261. Adjacent support sections 261 are fixed by flanges. The bottom support section 261 is double-fixed to the installation cylinder 24 by flanges and steel strands.

[0053] Continue to refer to Figure 1 The connecting component 3 includes a connecting beam 301 and a reinforcing rod 302. The two ends of the connecting beam 301 are fixedly installed on the two fixed cylinders 25 respectively. There are two reinforcing rods 302. One end of the two reinforcing rods 302 is fixedly connected to the two fixed cylinders 25 respectively, and the other end is fixedly connected to the connecting beam 301. This ensures the connection stability between the two fixed cylinders 25 and facilitates the movement of the entire platform on the sea surface by pulling the connecting beam 301.

[0054] The implementation principle of Embodiment 1 of this application is as follows: By connecting different numbers of connecting cylinder sections 201 and connecting the connecting cylinder sections 201 of the two extensions 2 away from the bending part 1 through the connecting parts 3, the structural size of the floating platform can be adjusted, thereby facilitating the adjustment of the buoyancy of the entire floating platform. This allows the float to adapt to the installation of fans 26 of different sizes or weights, which is beneficial to improving applicability. In addition, the setting of the extensions 2 formed by assembling each connecting cylinder section 201 with steel strands facilitates the transportation of the floating platform and the rapid production of various components of the floating platform.

[0055] Example 2.

[0056] The main difference between this embodiment and Embodiment 1 is that the structure of the connector 3 is different, and the ends of the connecting cylinder 201 of the two extensions 2 away from the bending member 1 are not provided with caps 23.

[0057] Reference Figure 5In this embodiment, the connector 3 includes two bent portions 303 and an extension portion 304. The two bent portions 303 have the same structure as the bent member 1 and are both made of high-strength structural steel. The bent portions 303 also include two integrally fixedly connected bent segments 101. The extension portion 304 has the same structure as the extension member 2. The extension portion 304 includes multiple connecting cylinders 3041 that are spliced ​​end to end. The connecting cylinders 3041 of the extension portion 304 are connected by steel strands. The connection method of the connecting cylinders 3041 of the extension portion 304 is the same as the connection method of the connecting cylinder sections 201 of the extension member 2, which is fixed by steel strands and sealing gaskets 8. This will not be described in detail here.

[0058] Continue to refer to Figure 5 The two ends of the extension 304 are respectively connected to one end of one of the bending sections 101 of the two bending parts 303, and one end of the other bending section 101 of the two bending parts 303 are respectively connected to the end of the two extensions 2 away from the bending part 1. The connection method between the extension 2 and the bending part 1, the connection method between the bending part 303 and the extension 304, and the connection method between the bending part 303 and the extension 2 are all the same. They are all connected and fixed by setting the first flange 10 and the second flange 11, which will not be described in detail here.

[0059] The implementation principle of Embodiment 2 of this application is the same as that of Embodiment 1. The main difference is that, through the additional setting of the two bending parts 303 and the extension part 304, the stress distribution of the platform as a whole under structural load is more uniform, which makes it easier to withstand more extreme loads and stresses in the marine environment, that is, to more stably achieve the bearing of the wind turbine 26.

[0060] This application also discloses a construction method for a triangular steel-concrete composite structure floating platform. The triangular steel-concrete composite structure floating platform and its construction method include the following specific steps: S1, prefabricated connecting cylinder sections 201 are spliced ​​end to end in sequence and connected by steel strands to achieve the splicing and forming of the extension 2.

[0061] S2, the ends of the steel strands connecting each connecting cylinder section 201 are fixed by the anchor plate 19 to ensure the overall stability of the extension 2 after splicing. Specifically, the anchor plate 19 after fixing the ends of the steel strands is located in the first groove 12 of the first flange 10.

[0062] S3, the two spliced ​​extensions 2 are fixedly installed at both ends of the bent part 1 by flanges. Specifically, when the first flange 10 and the second flange 11 are welded and fixed, each connecting rib 16 is inserted into the first groove 12 and the connecting rib 16 abuts against the inner wall of the first groove 12 to ensure the stability of the relative position of the first flange 10 and the second flange 11.

[0063] S4, install the connector 3 between the two extensions 2.

[0064] S5, the wind turbine 26 is installed on one of the floats using steel strands and bolts.

[0065] The implementation principle of the construction method of the triangular steel-concrete composite structure floating platform in this application embodiment is as follows: During the splicing process of the extension 2, the length of the extension 2 can be adjusted by connecting different numbers of connecting cylinder sections 201, that is, the size of the floating platform structure can be adjusted, thereby facilitating the adjustment of the buoyancy of the entire floating platform, so that the float can adapt to the installation of fans 26 of different sizes or weights, which is beneficial to improving applicability.

[0066] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A triangular steel-concrete composite structure floating platform, comprising a floating platform and pontoons, characterized in that: The floating platform includes a bending member (1), two extension members (2) and a connecting member (3). One end of the two extension members (2) is installed on the bending member (1). The extension member (2) includes multiple connecting cylinder sections (201) that are spliced ​​end to end. Each connecting cylinder section (201) of the extension member (2) is connected by steel strand. Multiple pontoons are provided. Each pontoon is fixedly installed on the top of the floating platform. One of the pontoons is used to connect with the fan (26). The connecting member (3) is used to connect the connecting cylinder sections (201) of the two extension members (2) that are away from the bending member (1). The extension (2) is fixedly installed with a first flange (10) at the end of the connecting cylinder (201) near the bending member (1), and the bending member (1) is fixedly installed with a second flange (11) at the end of the extension (2). The first flange (10) and the second flange (11) are fixed by welding. Each of the connecting cylinder sections (201) is provided with circumferentially distributed and through connecting holes (17). The first flange (10) has a first groove (12) arranged in a ring on the side facing the second flange (11). The first groove (12) is provided with a relief hole (18) that corresponds to the connecting hole (17) and is through it. Both the connecting hole (17) and the relief hole (18) are used for steel strands to pass through. One end of the steel strand is fixed in the first groove (12) by an anchor plate (19).

2. The triangular steel-concrete composite floating platform according to claim 1, characterized in that: The first groove (12) is provided with a plurality of circumferentially distributed first reinforcing ribs (13), and the second flange (11) has a ring-shaped second groove (14) on the side facing the first flange (10), and the second groove (14) is provided with a plurality of circumferentially distributed second reinforcing ribs (15).

3. The triangular steel-concrete composite floating platform according to claim 1, characterized in that: When the first flange (10) and the second flange (11) are welded and fixed, the first groove (12) and the second groove (14) are connected and grout is injected.

4. The triangular steel-concrete composite floating platform according to claim 1, characterized in that: The connecting cylinder (201) is provided with a water storage cavity (4). Two connecting partitions (5) are fixedly installed in the water storage cavity (4). Both connecting partitions (5) are arranged along the length direction of the extension (2) and divide the water storage cavity (4) into three partition cavities (401). At least two partition cavities (401) are provided with water inlet holes (6) and water outlet holes (7) that communicate with the outside.

5. A triangular steel-concrete composite floating platform according to claim 4, characterized in that: A sealing gasket (8) is fixedly provided between two adjacent connecting cylinder sections (201) of the extension (2).

6. A triangular steel-concrete composite floating platform according to claim 1, characterized in that: The float includes an installation cylinder (24) and a fixed cylinder (25). The installation cylinder (24) is fixedly installed on the top of the bent part (1). There are two fixed cylinders (25). The two fixed cylinders (25) are respectively fixedly installed on the top of the two extension parts (2) and located at the free ends of the two extension parts (2) away from the bent part (1). The distances from the two fixed cylinders (25) to the installation cylinder (24) are equal. The installation cylinder (24) is used to install the fan (26). The connector (3) includes a connecting beam (301) and a reinforcing rod (302). The two ends of the connecting beam (301) are respectively fixedly installed on the two fixed cylinders (25). There are two reinforcing rods (302). One end of the two reinforcing rods (302) is fixedly connected to the two floats, and the other end is fixedly connected to the connecting beam (301).

7. A triangular steel-concrete composite floating platform according to claim 1, characterized in that: The connector (3) includes two bent portions (303) and an extension portion (304). The two ends of the extension portion (304) are respectively connected to the two bent portions (303), and the other ends of the two bent portions (303) are respectively connected to the ends of the two extensions (2) away from the bent portions (1). The extension portion (304) includes a plurality of connecting cylinders (3041) spliced ​​end to end. Each connecting cylinder (3041) of the extension portion (304) is connected by steel strands.

8. A construction method for a triangular steel-concrete composite structure floating platform, based on the triangular steel-concrete composite structure floating platform according to any one of claims 1-7, characterized in that: The specific steps include: S1, splicing the pre-formed connecting cylinder section (201) end to end in sequence and connecting them with steel strands to achieve the splicing and forming of the extension part (2); S2, the ends of the steel strands connecting each connecting cylinder section (201) are fixed by the anchor plate (19) to ensure the overall stability of the extension (2) after splicing; S3, the two extension parts (2) formed by splicing are fixedly installed at both ends of the bent part (1) by flanges respectively; S4, install the connector (3) between the two extensions (2); S5, the fan (26) is installed on one of the floats by steel strands and bolts.

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