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

Abstract

This invention discloses a quadrilateral steel-concrete composite floating platform and its construction method, belonging to the technical field of floating platforms. It includes a floating platform and pontoons. The floating platform comprises a first floating body unit, a second floating body unit, a third floating body unit, and a connecting body. The first floating body unit is connected to the second and third floating body units at both ends via bending units. The connecting body is arranged parallel to the first floating body unit, and its two ends are connected to the second and third floating body units respectively. Each of the first, second, and third floating body units is composed of multiple floating body components sequentially spliced ​​end-to-end, with adjacent floating body components connected by steel strands. Multiple pontoons are provided, each pontoon being located on top of the floating platform. This application facilitates the rapid transportation of the floating platform to the designated installation location for installation.

Description

Technical Field

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

[0002] A floating platform is a large floating structure commonly used in marine engineering, oil exploration and development, and other offshore activities. It can be moved and deployed at sea, offering high flexibility and adaptability. Floating platforms typically have ample operating space, allowing for the installation of various equipment and tools to support diverse offshore operational needs.

[0003] Floating platforms used to provide buoyancy and stability for wind turbine units typically employ steel-concrete composite structures, meaning a combination of steel and concrete components that work together as a whole. This type of structure combines characteristics of both steel and reinforced concrete structures and is widely used in building construction, bridge engineering, highway and urban road engineering, underground engineering, marine engineering, and special containers.

[0004] Existing quadrilateral steel-concrete composite floating platforms typically consist of a floating platform and pontoons. The floating platform is a single, integrated quadrilateral structure, while multiple pontoons are fixedly mounted on top of the platform, with one pontoon used for connection to a wind turbine. The integrated floating platform structure is relatively large, making it inconvenient to quickly transport the floating platform to the designated location for installation. Summary of the Invention

[0005] To facilitate the rapid transport of the floating platform to the designated installation location for installation, this application provides a quadrilateral steel-concrete composite structure floating platform.

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

[0007] A quadrilateral steel-concrete composite floating platform includes a floating platform and pontoons. The floating platform includes a first floating body unit, a second floating body unit, a third floating body unit, and a connecting body. The first floating body unit is connected to the second and third floating body units at both ends by bending units. The connecting body is arranged parallel to the first floating body unit, and its two ends are connected to the second and third floating body units respectively. The first, second, and third floating body units are all composed of multiple floating body components assembled end to end, and adjacent floating body components are connected by steel strands. Multiple pontoons are provided, and each pontoon is located on the top of the floating platform.

[0008] By adopting the above technical solution, when the floating platform needs to be transported, since the first floating unit, the second floating unit, and the third floating unit are all composed of multiple floating parts, each floating part and bending unit can be transported to the designated installation position in sequence for installation. There is no need to transport the entire integrated floating platform structure. This makes it easy to quickly transport the floating platform to the designated installation position for installation. In addition, the individual size of each floating part and bending unit is small, which facilitates the rapid production of each floating part and bending unit.

[0009] Optionally, a first flange is fixedly installed at the end of the floating body near the bending unit, and a second flange is fixedly installed at the end of the bending unit. The first flange and the second flange are fixed together by welding.

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

[0011] Optionally, each of the floating body components 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 connection hole. Both the connection hole and the clearance hole 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 is provided with a ring-shaped second groove on the side away from 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 float component has a water storage cavity through it, and two connecting partitions are fixedly installed in the water storage cavity. Both connecting partitions are arranged along the length of the float component and divide the water storage cavity into three partition cavities. Each partition cavity is provided with an inlet and an outlet 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 adjacent float components of the first float unit, the second float unit, and the third float unit.

[0020] By adopting the above technical solution, the setting of the sealing gasket makes it easy to isolate the water inside and outside the float, which helps to ensure the overall stability of the connecting cylinder section after water is stored.

[0021] Optionally, the float includes an installation cylinder and a fixing cylinder. The installation cylinder is fixedly installed on the top of the first float unit and located near the middle of the length direction of the first float unit. There are two fixing cylinders, which are respectively fixedly installed on the top of the second float unit and the third float unit. The distances from the two fixing cylinders to the installation cylinder are equal. The installation cylinder is used to install the fan. The connecting body includes a connecting beam and reinforcing rods. The two ends of the connecting beam are respectively fixedly installed on the two fixing cylinders. There are two reinforcing rods, one end of each reinforcing rod is fixedly connected to the two floats, and the other end of each reinforcing rod 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 connecting body includes two bent components and a connecting component. The two ends of the connecting component are respectively connected to the two bent components, and the other ends of the two bent components are respectively connected to the ends of the second float unit and the third float unit away from the first float unit. The connecting component includes multiple connectors that are spliced ​​together end to end, and each connector of the connecting component 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 quadrilateral steel-concrete composite structure floating platform. Based on the aforementioned quadrilateral steel-concrete composite structure floating platform, the following technical solution is adopted, including the following specific steps: S1, prefabricated floating body components are sequentially spliced ​​end to end and connected by steel strands to form a first floating body unit, a second floating body unit, and a third floating body unit respectively; S2, the ends of the steel strands connecting each floating body component are fixed by anchor plates to ensure the overall stability of the first floating body unit, the second floating body unit, and the third floating body unit after splicing; S3, the two ends of the first floating body unit are connected to the second floating body unit and the third floating body unit respectively by two bending units; S4, the connector is installed between the second floating body unit and the third floating body unit; S5, the fan is installed on the pontoon located in the first floating body unit by steel strands and bolts.

[0026] By adopting the above technical solution, since multiple floating body components are sequentially spliced ​​together to form the first floating body unit, the second floating body unit, and the third floating body unit, each floating body component and bending unit can be transported to the designated installation position in sequence for assembly. There is no need to transport the entire integrated floating platform structure, which makes it easy to quickly transport the floating platform to the designated installation position for installation. In addition, the individual size of each floating body component and bending unit is small, which facilitates the rapid production of each floating body component and bending unit.

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

[0028] 1. Since the first floating body unit, the second floating body unit, and the third floating body unit are all composed of multiple floating body parts, each floating body part and bending unit can be transported to the designated installation position in sequence for installation. There is no need to transport the entire integrated floating platform structure, which makes the operation of quickly transporting the floating platform to the designated installation position for installation simple.

[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 bending unit and the floating unit 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 unit 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. First float unit; 2. Second float unit; 3. Third float unit; 4. Bending unit; 401. Bending section; 5. Float component; 6. Water storage cavity; 601. Partition cavity; 7. Connecting partition; 8. Water inlet; 9. Water outlet; 10. Sealing gasket; 11. Separator; 12. Stopping part; 13. First flange; 14. Second flange; 15. First groove; 16. First reinforcing rib; 17. Second groove; 18. Second reinforcing rib ; 19. Connecting rib; 20. Connecting hole; 21. Clearing hole; 22. Anchor plate; 221. Pad body; 222. Clamp; 2221. Clamping part; 23. Limiting spring; 24. Through hole; 25. Locking groove; 26. Placement groove; 27. End cap; 28. Mounting cylinder; 29. ​​Fixing cylinder; 30. Fan; 31. Support part; 32. Connecting beam; 33. Reinforcing rod; 34. Bending component; 35. Connecting component; 351. Connecting piece. 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 quadrilateral steel-concrete composite structure floating platform.

[0041] Reference Figure 1 The quadrilateral steel-concrete composite floating platform includes a floating platform and pontoons. The floating platform includes three floating body units and a connecting body. The three floating body units are respectively designated as the first floating body unit 1, the second floating body unit 2, and the third floating body unit 3. The two ends of the first floating body unit 1 are connected to the second floating body unit 2 and the third floating body unit 3 through bending units 4, respectively. The bending units 4 are made of high-strength structural steel to give them excellent properties such as fatigue resistance, bending moment resistance, shear resistance, and corrosion resistance. The bending unit 4 includes two integrally fixedly connected bending sections 401, with an included angle of ninety degrees between the two bending sections 401.

[0042] Reference Figure 1 and Figure 2 Each floating unit comprises floating body components 5, which are sequentially spliced ​​together end to end. These components 5 are connected by steel strands. Specifically, the floating body components 5 are made of UHPC ultra-high performance concrete, and their cross-section is annular. The top and bottom surfaces of the connecting cylinder are planar, while the two sides of the connecting cylinder 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 30. The planar top surface of the connecting cylinder facilitates easier placement and support of the structure, while the planar bottom surface provides better support and stable buoyancy.

[0043] Reference Figure 2 and Figure 3 A water storage cavity 6 is provided through the end of the floating body 5 along its own length direction. Two vertically arranged connecting partitions 7 are fixedly installed in the water storage cavity 6. The two sides of the vertical direction of the connecting partitions 7 are respectively fixedly connected to the two cavity walls of the water storage cavity 6. Both connecting partitions 7 are arranged along the length direction of the extension and are the same length as the connecting cylinder section, so that the connecting partitions 7 divide the water storage cavity 6 into three partition cavities 601. Specifically, the partition cavities 401 near the two sides of the floating body 5 are set as ballast cavities, and the partition cavities 401 near the middle of the floating body 5 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 3Each partition cavity 601 is equipped with a water inlet 8 and a water outlet 9 that communicate with the outside. When the partition cavity 401 located in the middle of the floating body 5 is designated as a passageway, the water inlet 6 and water outlet 7 are not provided in the passageway. Water is synchronously injected into the different partition cavities 601 of the water storage cavity 6 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, the pump can inject different amounts of water into different partition cavities 601 or pump water out of different partition cavities 601 to adjust the tilt of the extension, which helps to further ensure the overall stability of the floating platform.

[0045] Reference Figure 2 and Figure 4 To facilitate the isolation of water inside and outside the connecting cylinder section and thus ensure the overall stability of the float component 5 after water storage, a sealing gasket 10 is fixedly fitted onto the outer circumferential surface of one float component 5 facing the other float component 5. A partition 11 is fixedly provided on the inner side of the sealing gasket 10. When the two float components 5 are connected, the two float components 5 are respectively pressed against the two sides of the partition 11, and the inner side of the sealing gasket 10 is respectively pressed against the two float components 5, so as to fully ensure the sealing stability between the two float components 5 after connection. Both bending sections 401 of the bending unit 4 are fixedly provided with a stop part 12. The stop part 12 closes the opening at one end of each partition cavity 601 to achieve stable separation of each float unit partition cavity 601.

[0046] Reference Figure 2 and Figure 3 To facilitate a stable connection between the bending unit 4 and each float unit, the end of the float component 5 of each float unit near the bending unit 4 is fixedly installed with a first flange 13 by an anchor plate 22 and a steel strand. The end of the bending section 401 of the bending unit 4 near the float unit is fixedly installed with a second flange 14 by welding or bolts. The first flange 13 and the second flange 14 are fixed by welding.

[0047] Reference Figure 2 The first flange 13 has a first groove 15 arranged in a ring on the side facing the second flange 14. Multiple first reinforcing ribs 16 are fixedly arranged in a circumferentially evenly distributed manner in the first groove 15. The second flange 14 has a second groove 17 arranged in a ring on the side facing the first flange 13. Multiple second reinforcing ribs 18 are fixedly arranged in a circumferentially evenly distributed manner in the second groove 17 to ensure the structural stability of the first flange 13 and the second flange 14.

[0048] Continue to refer to Figure 2Multiple circumferentially distributed reinforcing ribs 19 are fixedly connected to the side of the second flange 14 away from the first flange 13, which helps to further ensure the structural strength of the second flange 14. After the first flange 13 and the second flange 14 are welded and fixed, the first groove 15 and the second groove 17 are connected. By grouting into the first groove 15, UHPC ultra-high performance concrete can be used as the grouting material in this embodiment. After the grouting solidifies, a grouting layer is formed in the first groove 15 and the second groove 17, which helps to further ensure the connection stability between the first flange 13 and the second flange 14.

[0049] Reference Figure 2 and Figure 3 The float component 5 and each connecting partition 7 are provided with connecting holes 20 that extend along their own length. The connecting holes 20 located in the connecting cylinder are evenly distributed circumferentially, while the connecting holes 20 located in the connecting partition 7 are evenly distributed along the length of their respective surfaces. The bottom wall of the first groove 15 is provided with clearance holes 21 that correspond one-to-one with each connecting hole 20 and extend through it. Both the connecting holes 20 and the clearance holes 21 are used for steel strands to pass through, so that the connection stability between each float component 5 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 22 at one end of each steel strand is located within the first groove 15 to conceal and protect the steel strand, preventing water immersion and corrosion and ensuring its service life. Further, the anchor plate 22 includes a plate body 221 and a clamp 222. The plate body 221 has through holes 24 for the steel strand to pass through. In this embodiment, two through holes 24 are provided, and two clamps 222 are provided corresponding to each through hole 24.

[0051] Reference Figure 3 The clamp 222 includes two clamping parts 2221. Each clamping part 2221 has a recessed positioning groove 25 on its opposite side, adapted to the shape of the steel strand. A limiting spring 23 is provided outside each clamping part 2221. The limiting spring 23 is arranged in a closed ring shape and is sleeved on the outer circumferential surface of the two clamping parts 2221. To ensure the stability of the limiting spring 23's position, a placement groove 26 is provided on the outer circumferential surface of each clamping part 2221 for placing the limiting spring 23. Under the elastic force of the limiting spring 23, the two clamping parts 2221 achieve compression and positioning of the steel strand. Both clamping parts 2221 are inserted into the through hole 24, and the cross-sectional dimensions of the two clamping parts 2221 gradually increase from the direction near the opening of the through hole 24 to the direction away from the opening of the through hole 24, to fully ensure the stability of the two clamping parts 2221 in compressing and positioning the steel strand.

[0052] Reference Figure 1Both the second float unit 2 and the third float unit 3 have end caps 27 at the ends of the float components 5 that are away from the first float unit 1. The connection between the end caps 27 and the float components 5 is the same as the connection between the float components 5 and the bending unit 4. They are fixed by the first flange 13 and the second flange 14, which will not be described in detail here. The end caps 27 are mainly used to achieve stable closure of the opening at the end of the connecting cylinder section.

[0053] Continue to refer to Figure 1 In this embodiment, three floats are provided. Specifically, each float includes an installation cylinder 28 and a fixing cylinder 29. The installation cylinder 28 is vertically fixedly installed on the top of the first float unit 1 and is located near the middle of the length of the first float unit 1. Two fixing cylinders 29 are provided, and are respectively fixedly installed on the top of the second float unit 2 and the third float unit 3. The two fixing cylinders 29 are located near the free ends of the second float unit 2 and the third float unit 3 away from the first float unit 1, and the distances from the two fixing cylinders 29 to the installation cylinder 28 are equal. The installation cylinder 28 is used to install the fan 30. Specifically, the support part of the fan 30 is composed of multiple support sections 31 spliced ​​together. Adjacent support sections 31 are fixed by flanges, and the bottom support section 31 is double-fixed to the installation cylinder 28 by flanges and steel strands.

[0054] Continue to refer to Figure 1 The connecting body includes a connecting beam 32 and reinforcing rods 33. The two ends of the connecting beam 32 are fixedly installed on the two fixed cylinders 29 respectively. There are two reinforcing rods 33. One end of each reinforcing rod 33 is fixedly connected to the two fixed cylinders 29 respectively, and the other end is fixedly connected to the connecting beam 32. This ensures the connection stability between the two fixed cylinders 29 and facilitates the movement of the entire platform on the sea surface by pulling the connecting beam 32.

[0055] The implementation principle of Embodiment 1 of this application is as follows: When the floating platform needs to be transported, since the first floating unit 1, the second floating unit 2 and the third floating unit 3 are all composed of multiple floating parts 5, each floating part 5 and the bending unit 4 can be transported to the designated installation position in sequence for installation. There is no need to transport the entire integrated floating platform structure. This makes it easy to quickly transport the floating platform to the designated installation position for installation. In addition, the individual size of each floating part 5 and the bending unit 4 is small, which facilitates the rapid production of each floating part 5 and the bending unit 4.

[0056] Example 2.

[0057] The main difference between this embodiment and Embodiment 1 is that the structure of the connecting body is different, and the ends of the floats 5 of the second float unit 2 and the third float unit 3 that are far from the first float unit 1 are not provided with end caps 27.

[0058] Reference Figure 5 In this embodiment, the connecting body includes two bent components 34 and a connecting component 35. The two bent components 34 have the same structure as the bent unit 4 and are both made of high-strength structural steel. The bent components 34 also include two integrally fixedly connected bent sections 401. The connecting component 35 has the same structure as each floating unit. The connecting component 35 includes multiple connectors 351 that are spliced ​​end to end. Each connector 351 of the connecting component 35 is connected by steel strands. The connection method of each connector 351 of the connecting component 35 is the same as the connection method of each floating component 5 of a single floating unit, which is fixed by steel strands and sealing gaskets 10. This will not be described in detail here.

[0059] Continue to refer to Figure 5 The two ends of the connecting member 35 are respectively connected to one end of one of the bending sections 401 of the two bending members 34, and one end of the other bending section 401 of the two bending members 34 is respectively connected to the ends of the second float unit 2 and the third float unit 3 away from the first float unit 1. The connection method between the connecting member 35 and the bending member 34, the connection method between the bending member 34 and one of the float units, and the connection method between one of the float units and the bending unit 4 are all the same, and are all connected and fixed by setting the first flange 13 and the second flange 14, which will not be described in detail here.

[0060] 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 two bending members 34 and connecting members 35, the stress situation of the platform as a whole when bearing the structure 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 30.

[0061] This application also discloses a construction method for a quadrilateral steel-concrete composite structure floating platform. The quadrilateral steel-concrete composite structure floating platform and its construction method include the following specific steps: S1, prefabricated floating body parts 5 are spliced ​​end to end in sequence and connected by steel strands to form a first floating body unit 1, a second floating body unit 2 and a third floating body unit 3 respectively.

[0062] S2, the ends of the steel strands connecting each float component 5 are fixed by the anchor plate 22 to ensure the overall stability of the first float unit 1, the second float unit 2 and the third float unit 3 after splicing. Specifically, the anchor plate 22 after fixing the ends of the steel strands is located in the first groove 15 of the first flange 13.

[0063] S3, the two ends of the first float unit 1 are connected to the second float unit 2 and the third float unit 3 respectively through two bending units 4. Specifically, the bending unit 4 and the two float units are welded and fixed by the first flange 13 and the second flange 14. When the first flange 13 and the second flange 14 are welded and fixed, each connecting rib 19 is inserted into the first groove 15 and the connecting rib 19 abuts against the inner wall of the first groove 15 to ensure the stability of the relative position of the first flange 13 and the second flange 14.

[0064] S4, install the connector between the second float unit 2 and the third float unit 3.

[0065] S5, the fan 30 is installed on the pontoon located in the first floating unit 1 by means of steel strands and bolts.

[0066] The implementation principle of the construction method of a quadrilateral steel-concrete composite floating platform according to the embodiments of this application is as follows: Since multiple floating body parts 5 are spliced ​​together in sequence to form a first floating body unit 1, a second floating body unit 2 and a third floating body unit 3, each floating body part 5 and bending unit 4 can be transported to the designated installation position in sequence for assembly. There is no need to transport the entire integrated floating platform structure, which makes it easy to quickly transport the floating platform to the designated installation position for installation. In addition, the individual size of each floating body part 5 and bending unit 4 is small, which facilitates the rapid production of each floating body part 5 and bending unit 4.

[0067] 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 quadrilateral steel-concrete composite structure floating platform, comprising a floating platform and pontoons, characterized in that: The floating platform includes a first floating body unit (1), a second floating body unit (2), a third floating body unit (3), and a connecting body. The first floating body unit (1) is connected to the second floating body unit (2) and the third floating body unit (3) at both ends by bending units (4). The connecting body is arranged parallel to the first floating body unit (1), and the two ends of the connecting body are connected to the second floating body unit (2) and the third floating body unit (3) respectively. The first floating body unit (1), the second floating body unit (2), and the third floating body unit (3) are all formed by splicing multiple floating body parts (5) end to end. Adjacent floating body parts (5) are connected by steel strands. Multiple buoys are provided, and each buoy is located on the top of the floating platform. A first flange (13) is fixedly installed at the end of the floating body (5) near the bending unit (4), and a second flange (14) is fixedly installed at the end of the bending unit (4). The first flange (13) and the second flange (14) are fixed by welding. Each of the floating body components (5) is provided with circumferentially distributed and through-holes (20). The first flange (13) has a first groove (15) arranged in a ring on the side facing the second flange (14). The first groove (15) is provided with a clearance hole (21) that corresponds to the connection hole (20) and is through-holes. Both the connection hole (20) and the clearance hole (21) are used for steel strands to pass through. One end of the steel strand is fixed in the first groove (15) by an anchor plate (22). When the first flange (13) and the second flange (14) are welded and fixed, the first groove (15) and the second groove (17) are connected and grout is injected.

2. The quadrilateral steel-concrete composite structure floating platform according to claim 1, characterized in that: The first groove (15) is provided with a plurality of circumferentially distributed first reinforcing ribs (16), and the second flange (14) has a ring-shaped second groove (17) on the side facing the first flange (13), and the second groove (17) is provided with a plurality of circumferentially distributed second reinforcing ribs (18).

3. The quadrilateral steel-concrete composite structure floating platform according to claim 1, characterized in that: The floating body (5) is provided with a water storage cavity (6) through it. Two connecting partitions (7) are fixedly installed in the water storage cavity (6). The two connecting partitions (7) are arranged along the length of the floating body (5) and divide the water storage cavity (6) into three partition cavities (601). At least two of the partition cavities (601) are provided with water inlet holes (8) and water outlet holes (9) that are connected to the outside.

4. A quadrilateral steel-concrete composite structure floating platform according to claim 3, characterized in that: A sealing gasket (10) is fixedly provided between two adjacent float components (5) of the first float unit (1), the second float unit (2) and the third float unit (3).

5. A quadrilateral steel-concrete composite floating platform according to claim 1, characterized in that: The float includes an installation cylinder (28) and a fixed cylinder (29). The installation cylinder (28) is fixedly installed on the top of the first float unit (1) and located near the middle of the length direction of the first float unit (1). There are two fixed cylinders (29). The two fixed cylinders (29) are fixedly installed on the top of the second float unit (2) and the third float unit (3), respectively. The distances from the two fixed cylinders (29) to the installation cylinder (28) are equal. The installation cylinder (28) is used to install the fan (30). The connecting body includes a connecting beam (32) and a reinforcing rod (33). The two ends of the connecting beam (32) are fixedly installed on the two fixed cylinders (29), respectively. There are two reinforcing rods (33). One end of the two reinforcing rods (33) is fixedly connected to the two floats, and the other end is fixedly connected to the connecting beam (32).

6. A quadrilateral steel-concrete composite structure floating platform according to claim 1, characterized in that: The connecting body includes two bending members (34) and a connecting member (35). The two ends of the connecting member (35) are respectively connected to the two bending members (34). The other ends of the two bending members (34) are respectively connected to the ends of the second float unit (2) and the third float unit (3) away from the first float unit (1). The connecting member (35) includes a plurality of connectors (351) spliced ​​end to end. Each connector (351) of the connecting member (35) is connected by steel strands.

7. A construction method for a quadrilateral steel-concrete composite structure floating platform, based on the quadrilateral steel-concrete composite structure floating platform according to any one of claims 1-6, characterized in that: The specific steps include: S1, splicing the pre-formed floating body parts (5) end to end in sequence and connecting them with steel strands to form the first floating body unit (1), the second floating body unit (2) and the third floating body unit (3) respectively; S2, the ends of the steel strands connecting each floating body component (5) are fixed by the anchor plate (22) to ensure the overall stability of the first floating body unit (1), the second floating body unit (2) and the third floating body unit (3) after splicing; S3, the connection between the two ends of the first floating body unit (1) and the second floating body unit (2) and the third floating body unit (3) is realized by the two bending units (4); S4, install the connector between the second float unit (2) and the third float unit (3); S5, the fan (30) is installed on the pontoon located in the first floating unit (1) by means of steel strand and bolts.

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