Construction method of spliced composite steel plate bearing abutment for ocean floating structure

Abstract

The invention discloses a construction method of a spliced composite steel plate bearing abutment for an ocean floating structure, and relates to the technical field of ocean engineering construction. According to the method, unit buoyancy tanks, connecting assemblies, limiting assemblies and buffering and energy-absorbing assemblies of a bearing base station are firstly subjected to factory standardized prefabrication and then transported to a site for modular splicing construction, and unit buoyancy tank placement, buffering and energy-absorbing assembly installation, connecting assembly assembling, limiting assembly installation and overall acceptance are sequentially completed. The unit buoyancy tanks are made of stainless steel / carbon steel composite steel plates, the connecting assemblies achieve stable connection of the adjacent buoyancy tanks through multiple anti-loosening structures, and the buffering energy absorption assemblies can dissipate wave impact energy. The bearing base platform can be rapidly installed, the construction risk and cost are reduced, the corrosion resistance, impact resistance and stability of the base platform are improved, and the bearing base platform meets the bearing base platform construction requirements of various ocean floating structures for deep and far sea culture, sea sightseeing and the like.

Description

Technical Field

[0001] This invention belongs to the field of marine engineering construction technology, specifically relating to a construction method for a spliced ​​composite steel plate load-bearing base for marine floating structures. Background Technology

[0002] As human exploitation of marine resources gradually extends from nearshore to deep-sea areas, the application of various floating structures in the field of marine engineering is becoming increasingly widespread. These floating structures not only need to bear the weight of the superstructure and their own weight, but also must effectively withstand the impact of complex and ever-changing marine environmental loads such as strong winds, giant waves, and strong currents. In this context, the load-bearing platform, as the core component of the entire structure, is directly related to the safety and stability of the overall structure and is crucial to ensuring the normal operation of marine floating facilities.

[0003] Traditional marine floating structures typically employ an integral design for their load-bearing bases, with construction methods also centered around this integral structure. While this approach offers certain advantages under specific conditions, it also presents several significant drawbacks: Firstly, the integral load-bearing bases must be manufactured in a factory and transported to the marine construction area. Their large size and weight lead to complex manufacturing processes, difficult transportation, and cumbersome on-site installation, requiring the use of large offshore hoisting equipment. This not only significantly increases project costs and time but also raises safety risks during offshore construction. Furthermore, limitations in transportation and hoisting conditions make it difficult to adapt to the construction needs of large-scale deep-sea marine floating structures. Secondly, the construction process for integral load-bearing bases lacks standardized installation schemes for buffer and energy-absorbing structures. After completion, the bases are unable to effectively buffer wave impacts, resulting in significant swaying under wave action. This not only affects the stability and safety of the bases themselves but also severely interferes with the normal operation of the superstructure, thereby reducing the overall efficiency and reliability of the marine floating structure.

[0004] Therefore, there is an urgent need for a construction method for a spliced ​​composite steel plate load-bearing base for marine floating structures, so as to achieve rapid and standardized on-site assembly of the load-bearing base, ensure the structural stability of the base after splicing, and standardize the installation process of the buffer energy absorption components to ensure that they effectively dissipate wave impact energy and reduce the sway amplitude of the base. Summary of the Invention

[0005] The purpose of this invention is to provide a construction method for a spliced ​​composite steel plate load-bearing base for marine floating structures, so as to solve the technical problems of high construction difficulty and cost of existing integral load-bearing bases, lack of standardized procedures, poor connection stability and non-standard installation of buffer energy absorption components in the construction of spliced ​​bases.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A construction method for a spliced ​​composite steel plate load-bearing base for a marine floating structure, the key being that the load-bearing base includes a unit pontoon (100), a connecting component (200), a limiting component (300), and a buffer energy-absorbing component (400). The unit pontoon (100) is a hollow buoyancy structure formed by stainless steel / carbon steel composite steel plates, with at least three splicing slots evenly arranged around its circumference. Adjacent unit pontoons (100) are joined together through the splicing slots to form a splicing cavity. The connecting component (200) is disposed in the splicing cavity to connect adjacent unit pontoons (100). The limiting component (300) connects the unit pontoon (100) and the connecting component (200) to restrict the connecting component (200) from detaching from the splicing cavity. The buffer energy-absorbing component (400) is movably installed at the bottom of the unit pontoon (100) and configured to generate a relative displacement with the unit pontoon (100) under wave load to dissipate wave impact energy. The construction method includes the following steps: S1. Factory prefabrication: The stainless steel / carbon steel composite steel plate is cut, bent and welded to form the panel of the unit float (100) and welded into a sealed hollow unit float (100). At least three splicing grooves are processed in the circumference of the unit float (100). At the same time, the connecting component (200), the limiting component (300) and the buffer energy absorption component (400) are prefabricated. S2. On-site transportation and placement: Transport the prefabricated unit pontoons (100), connecting components (200), limiting components (300) and buffer energy absorption components (400) to the marine construction area, and place multiple unit pontoons (100) according to the design size of the load-bearing base, so that the splicing slots of adjacent unit pontoons (100) are connected to form a splicing cavity. S3. Installation of buffer energy absorption component: Movably assemble the buffer energy absorption component (400) to the bottom of the unit float (100) to complete the connection between the buffer energy absorption component (400) and the unit float (100); S4. Assembly of connecting components: Install the connecting components (200) into the splicing cavity so that the adjacent unit floats (100) are fixedly connected through the connecting components (200); S5. Installation of limiting component: Connect the limiting component (300) between the unit float (100) and the connecting component (200) to prevent the connecting component (200) from coming out of the splicing cavity; S6. Overall acceptance: Check the splicing status of the unit pontoon (100), the fixing status of the connecting components (200), the connection status of the limiting components (300), and the assembly status of the buffer energy absorption components (400). After the acceptance is qualified, the on-site construction of the load-bearing base is completed.

[0007] Furthermore, the stainless steel / carbon steel composite plate includes an outer stainless steel layer (101), a resin filling layer (102), a carbon steel layer (103), and an inner stainless steel layer (104). The resin filling layer (102) is configured as a porous honeycomb structure. In step S1, the stainless steel / carbon steel composite plate is composited into one piece by a hot-pressing composite process, and then cut, bent, and welded.

[0008] Furthermore, the connecting assembly (200) includes a connecting post (202) and a connecting lug (201) fixed at the splicing groove of the unit float (100). Adjacent connecting lugs (201) on the same unit float (100) are staggered in the height direction, and the connecting lug (201) is provided with a connecting hole (203) that cooperates with the connecting post (202). In step S2, when adjacent unit floats (100) are placed, the connecting lugs (201) are staggered and overlapped. In step S4, the connecting assembly (200) is assembled to pass the connecting post (202) through the connecting hole (203) of the overlapped connecting lug (201) to realize the connection of adjacent unit floats (100).

[0009] Furthermore, the connecting post (202) includes a post body (204) and a limiting protrusion (205) disposed on the outer periphery of the post body (204), and the connecting hole (203) includes a central hole and a limiting groove disposed on the outer periphery of the central hole; in step S4, when assembling the connecting post (202), first align the post body (204) with the central hole, align the limiting protrusion (205) with the limiting groove and insert it into the connecting hole (203), and then rotate the connecting post (202) to make the limiting protrusion (205) and the limiting groove misaligned, thereby realizing the axial limiting of the connecting post (202) and the connecting ear plate (201).

[0010] Furthermore, the top of the column (204) is integrally formed with a positioning head (206), and the splicing groove is provided with a positioning groove that cooperates with the positioning head (206); in step S4, when the connecting column (202) is inserted into the connecting hole (203) until the positioning head (206) is inserted into the positioning groove, the overlapping connecting ear plate (201) is restricted between the limiting protrusion (205) and the positioning head (206).

[0011] Furthermore, the column (204) is configured as a threaded column, and a sliding sleeve (207) and a threaded sleeve (208) are fitted on the column (204). The limiting protrusion (205) is integrally formed on the surface of the sliding sleeve (207), and the threaded sleeve (208) is fitted at both ends of the sliding sleeve (207). In step S4, after the connecting column (202) is assembled, the axial position of the threaded sleeve (208) on the column (204) is adjusted to drive the sliding sleeve (207) to move, so that the distance between the limiting protrusion (205) and the positioning column head (206) is precisely matched with the actual height of the overlapping connecting ear plate (201).

[0012] Furthermore, the limiting component (300) includes a limiting frame that snaps onto the top of the unit float (100), the limiting frame including a limiting arc portion that engages circumferentially with the positioning column head (206); in step S5, the limiting component (300) is installed to snap the limiting frame onto the top of the unit float (100), so that the limiting arc portion engages circumferentially with the positioning column head (206), thereby restricting the rotation of the connecting column (202).

[0013] Furthermore, the limiting frame includes an outer frame (301) and a reinforcing frame (302) fixed inside the outer frame (301), and the limiting arc is disposed on the outer frame (301); in step S5, when the limiting frame is snapped onto the top of the unit float (100), the limiting frame is fixed by the cooperation between the reinforcing frame (302) and the unit float (100).

[0014] Furthermore, the buffer energy absorption assembly (400) includes a perforated plate (401) and at least one elastic telescopic rod (402) connecting the perforated plate (401) and the unit float (100). The bottom of the unit float (100) is uniformly fixed with a plurality of reinforcing ribs (105), which surround the perforated plate (401). In step S3, the buffer energy absorption assembly (400) is installed such that the two ends of the elastic telescopic rod (402) are respectively connected to the bottom of the perforated plate (401) and the bottom of the unit float (100), so that there is a gap between the perforated plate (401) and the bottom of the unit float (100).

[0015] Furthermore, in step S3, the gap between the perforated plate (401) and the bottom of the unit float (100) is set to 80mm, so that the perforated plate (401) is completely submerged in water and does not participate in providing buoyancy. In step S6, the degree of freedom of movement of the perforated plate (401) is checked during the overall acceptance to ensure that the perforated plate (401) can generate relative displacement with the unit float (100) under the action of wave load.

[0016] Compared with the prior art, the present invention has the following advantages: (1) This invention uses prefabricated unit pontoons, connecting components, limiting components and buffer energy absorption components in the factory, and then performs on-site modular splicing construction, which realizes the rapid on-site installation of the load-bearing base, greatly shortens the offshore construction time, reduces construction risks and engineering costs; at the same time, the modular construction method can adapt to the construction needs of different sizes of marine floating structure load-bearing bases, and solves the problem of the difficulty of transportation and installation of traditional integral bases.

[0017] (2) The stainless steel / carbon steel composite steel plate in this invention is made by hot pressing composite process, and is formed into unit floats by standardized cutting, bending and welding; its outer stainless steel layer and inner stainless steel layer give the unit floats good corrosion resistance, while the porous honeycomb resin filling layer and carbon steel layer effectively improve the impact resistance and structural strength of the unit floats, ensuring the overall durability of the base.

[0018] (3) The present invention adopts a connection method of connecting column and connecting ear plate, which is convenient to operate; and achieves multiple anti-loosening through the axial limiting of the limiting protrusion and the limiting groove, the axial clamping of the limiting protrusion and the positioning column head, and the circumferential meshing of the limiting frame and the positioning column head. After construction, it can effectively ensure the stability of the splicing of adjacent unit floating boxes and avoid the problem of loosening and misalignment under marine load.

[0019] (4) In this invention, the column body of the connecting column is a threaded column, and the limiting protrusion is integrally formed on the sliding sleeve; during construction, the height of the limiting protrusion can be flexibly adjusted by adjusting the threaded sleeve to adapt to the fixing of connecting ear plates of different positions and thicknesses, thereby improving the flexibility and adaptability of construction.

[0020] (5) The present invention standardizes the installation process of the buffer energy absorption component, so that the perforated plate and the bottom of the unit pontoon are kept at a preset gap and connected by elastic telescopic rods, ensuring that the perforated plate can generate relative displacement with the unit pontoon under wave load. Through the dual buffering of fluid resistance and elastic deformation, the wave impact energy is dissipated, effectively reducing the sway amplitude of the overall load-bearing base and improving the stability of the base. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the load-bearing platform in this invention; Figure 2 This is a schematic diagram of the assembly of the unit float and the connecting components in this invention; Figure 3 This is a schematic diagram of the assembly of the unit float and the buffer energy absorption component in this invention; Figure 4 This is an exploded view of the assembly structure of the unit float and the buffer energy absorption component in this invention; Figure 5 This is a schematic diagram of the connecting component in this invention; Figure 6This is a cross-sectional view of the unit pontoon in this invention; Figure 7 for Figure 6 Enlarged view of point A in the image; In the diagram: Unit float - 100; Outer stainless steel layer - 101; Resin filling layer - 102; Carbon steel layer - 103; Inner stainless steel layer - 104; Reinforcing rib - 105; Connecting assembly - 200; Connecting ear plate - 201; Connecting column - 202; Connecting hole - 203; Column body - 204; Limiting protrusion - 205; Positioning column head - 206; Sliding sleeve - 207; Threaded sleeve - 208; Limiting assembly - 300; Outer frame - 301; Reinforcing frame - 302; Buffer energy absorption assembly - 400; Perforated plate - 401; Elastic telescopic rod - 402. Detailed Implementation

[0022] To further understand the content of this invention, a detailed description of the invention is provided in conjunction with specific embodiments. The construction process and operation methods illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the invention can be implemented. Therefore, they have no substantial technical significance. Any adjustments to the construction process or minor changes to the operation methods, without affecting the effects and objectives that the invention can produce, should still fall within the scope of the technical content disclosed in this invention.

[0023] Furthermore, terms such as "upper," "lower," "circumferential," and "axial" used in this specification are merely for clarity of description and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention. It should be noted that terms such as "first," "second," etc., in the specification, claims, and above description of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate.

[0024] The construction method of the spliced ​​composite steel plate load-bearing base for marine floating structures described in this invention is based on the core of achieving efficient and stable construction of the load-bearing base through modular prefabrication and standardized on-site splicing, which is suitable for the use requirements of various marine floating structures. The core structure and construction steps of this invention will be explained in detail below, and then its actual application will be described in conjunction with specific application scenarios.

[0025] Please see Figures 1 to 7First, the structural components of the load-bearing platform involved in this invention will be explained: The load-bearing platform mainly consists of unit floats 100, connecting components 200, limiting components 300, and buffer energy-absorbing components 400. The unit floats 100 are the basic load-bearing components of the load-bearing platform, and are enclosed by stainless steel / carbon steel composite plates to form a closed, hollow buoyancy structure. At least three splicing slots are evenly arranged around its circumference for docking with adjacent unit floats 100. Adjacent unit floats 100, after docking through the splicing slots, form a splicing cavity, providing installation space for the connecting components 200.

[0026] like Figure 6 and Figure 7 As shown, the stainless steel / carbon steel composite steel plate adopts a four-layer composite structure, specifically composed of an outer stainless steel layer 101, a resin-filled layer 102, a carbon steel layer 103, and an inner stainless steel layer 104. The resin-filled layer 102 adopts a porous honeycomb structure. This composite structure design can improve the corrosion resistance of the unit pontoon 100 through the outer stainless steel layer 101 and the inner stainless steel layer 104, adapting to the harsh marine environment of high salt and high humidity. The porous honeycomb resin-filled layer 102, together with the carbon steel layer 103, can effectively improve the impact resistance and structural strength of the unit pontoon 100, ensuring that the unit pontoon 100 can bear the weight of the superstructure and itself, while resisting wave impact.

[0027] from Figure 2 and Figure 5 As can be seen, the connecting component 200 is used to achieve a fixed connection between adjacent unit floats 100. It mainly includes a connecting post 202 and a connecting lug 201. The connecting lug 201 is fixed at the splicing slot of the unit float 100. Adjacent connecting lugs 201 on the same unit float 100 are staggered in the height direction; that is, one connecting lug 201 is positioned closer to the top of the splicing slot, while its adjacent connecting lug 201 is positioned closer to the bottom of the splicing slot. (Reference) Figure 2The four corners of the unit float 100 are marked as “o”, “oo”, “ooo”, and “oooo”, respectively. According to the different markings, the connecting lugs 201 at the corresponding splicing slots are set at different heights, so that the connecting lugs 201 of adjacent unit floats 100 can be staggered and overlapped when splicing. Furthermore, the connecting lugs 201 are provided with connecting holes 203 that cooperate with the connecting posts 202. That is, by passing the connecting posts 202 through the connecting holes 203 of the multiple sets of staggered connecting lugs 201 on adjacent unit floats 100, the connection and fixation of adjacent unit floats 100 can be achieved. For example, if the height of the connecting ear plate 201 at "o" is H and the thickness of each connecting ear plate 201 is D, then the height of the connecting ear plate 201 at "oo" is HD (or H+D), the height of the connecting ear plate 201 at "ooo" is H-2D (or H+2D), and the height of the connecting ear plate 201 at "oooo" is H-3D (or H+3D). This ensures that after multiple unit floats 100 are spliced, the four connecting ear plates 201 can achieve a seamless staggered overlap, ensuring the stability of the splicing between the unit floats 100 and the connecting components 200.

[0028] The connecting post 202 further includes a post body 204 and a limiting protrusion 205. The limiting protrusion 205 is disposed on the outer periphery of the post body 204. Correspondingly, the connecting hole 203 includes a central hole and a limiting groove. The limiting groove is disposed on the outer periphery of the central hole. The size and position of the limiting protrusion 205 and the limiting groove are adapted to each other, so as to realize the axial limiting of the connecting post 202 and the connecting ear plate 201. The top of the post body 204 is integrally formed with a positioning head 206. The splicing groove is provided with a positioning groove that cooperates with the positioning head 206. After the positioning head 206 is inserted into the positioning groove, it can further improve the installation stability of the connecting post 202, and at the same time restrict the overlapping connecting ear plate 201 between the limiting protrusion 205 and the positioning head 206, so as to realize the tight fixation of the connecting ear plate 201.

[0029] To accommodate overlapping connecting ear plates 201 of varying thicknesses, the column 204 employs a threaded column structure. A sliding sleeve 207 and a threaded sleeve 208 are fitted onto the column 204. A limiting protrusion 205 is integrally formed on the surface of the sliding sleeve 207, and the threaded sleeve 208 engages at both ends of the sliding sleeve 207. Specifically, the sliding sleeve 207 can slide axially on the column 204, and the threaded sleeve 208 is threadedly connected to the column 204. By rotating and adjusting the axial position of the threaded sleeve 208 on the column 204, the sliding sleeve 207 can be moved axially along the column 204, thereby adjusting the distance between the limiting protrusion 205 and the positioning column head 206 to precisely match the actual height of the overlapping connecting ear plate 201, ensuring a tight connection. Preferably, in this embodiment, four limiting protrusions 205 on the surface of the sliding sleeve 207 and four limiting grooves around the outer periphery of the central hole are preferably provided to ensure uniform circumferential force after the connecting ear plate 201 and the connecting column 202 are connected.

[0030] Please see Figure 2 The limiting component 300 is used to restrict the connecting component 200 from disengaging from the splicing cavity. It mainly includes a limiting frame that snaps onto the top of the unit float 100. The limiting frame has limiting arc portions (preferably four in this embodiment, located at the four corners) that circumferentially engage with the positioning column head 206. Through the circumferential engagement of the limiting arc portions with the positioning column head 206, the rotation of the connecting column 202 is restricted, ensuring that the limiting protrusion 205 and the limiting groove remain misaligned, preventing the connecting column 202 from loosening and disengaging. The limiting frame further includes an outer frame 301 and a reinforcing frame 302. The reinforcing frame 302 is fixed inside the outer frame 301, and the limiting arc portions are located on the outer frame 301. When the limiting frame is snapped onto the top of the unit float 100, the cooperation between the reinforcing frame 302 and the unit float 100 achieves stable fixation of the limiting frame, while simultaneously improving the structural strength of the limiting frame. In addition, the reinforcing frame 302 is configured as a cross structure; correspondingly, the slot on the top of the unit float 100 is also a cross structure. During installation, the reinforcing frame 302 is inserted into the slot with an interference fit, thereby achieving a reliable connection between the limiting frame and the unit float 100.

[0031] like Figure 3 and Figure 4As shown, the buffer energy absorption component 400 is used to dissipate wave impact energy and reduce the sway amplitude of the base. It mainly includes a perforated plate 401 and an elastic telescopic rod 402. At least one elastic telescopic rod 402 is provided to connect the perforated plate 401 to the bottom of the unit float 100, allowing the perforated plate 401 to be movably installed at the bottom of the unit float 100. Multiple reinforcing ribs 105 are evenly fixed to the bottom of the unit float 100, surrounding the perforated plate 401 to form a buffer cavity that cooperates with the perforated plate 401. Specifically, the depth of the buffer cavity is slightly greater than the movement range of the perforated plate 401, allowing the perforated plate 401 to move freely within a certain range while also acting as a limiter to ensure the stability of the perforated plate 401's movement and prevent damage to the perforated plate 401 due to excessive displacement caused by wave impact. A gap, preferably 80mm, is left between the perforated plate 401 and the bottom of the unit float 100. This ensures that the perforated plate 401 is completely submerged in water and does not contribute to buoyancy. When the overall base is impacted by waves, the impact force acts on the perforated plate 401, causing it to move relative to the unit float 100 in the water. On one hand, as the perforated plate 401 moves up and down, the water flow through the holes on the plate generates fluid resistance. On the other hand, the perforated plate 401 drives the elastic telescopic rod 402 to extend and retract, further absorbing energy through the deformation of elastic elements (such as springs), thereby effectively buffering wave impact and suppressing the swaying of the unit float 100. In other words, under wave load, the perforated plate 401 can generate relative displacement with the unit float 100, and the wave impact energy is dissipated through a double buffering effect of fluid resistance and the elastic deformation of the elastic telescopic rod 402.

[0032] The construction steps of this invention will be explained in detail below: The first step is factory prefabrication, the core of which is to complete the standardized prefabrication of each component, laying the foundation for on-site construction. Specifically, the outer stainless steel layer 101, resin-filled layer 102, carbon steel layer 103, and inner stainless steel layer 104 are first bonded together using a hot-pressing composite process to create a stainless steel / carbon steel composite plate. Then, the formed stainless steel / carbon steel composite plate is cut, bent, and welded to form the panels of the unit float 100. Subsequently, the panels are welded together to form a sealed, hollow unit float 100, and at least three splicing slots are machined around the circumference of the unit float 100. Simultaneously, ear plates 20 are fixedly connected to the splicing slots of the unit float 100. 1. The bottom is fixed with a reinforcing rib plate 105; the connecting component 200, the limiting component 300 and the buffer energy absorption component 400 are prefabricated simultaneously. The connecting column 202 of the connecting component 200 is prefabricated as a threaded column structure with a positioning column head 206. The sliding sleeve 207, the threaded sleeve 208 and the column body 204 are pre-assembled. The limiting frame of the limiting component 300 is prefabricated as a structure with a reinforcing frame 302 and a limiting arc. The perforated plate 401 and the elastic telescopic rod 402 of the buffer energy absorption component 400 are pre-assembled to ensure that the prefabrication accuracy of each component meets the construction requirements.

[0033] The second step is on-site transportation and placement. The core of this step is to safely transport the prefabricated components to the construction sea area and complete the initial placement of the unit pontoons 100 according to the design requirements. Specifically, the prefabricated unit pontoons 100, connecting components 200, limiting components 300, and buffer energy-absorbing components 400 are transported to the marine construction sea area using marine transportation equipment. Then, according to the design dimensions and layout requirements of the load-bearing base, multiple unit pontoons 100 are placed in the designated construction positions to ensure that the splicing slots of adjacent unit pontoons 100 are precisely aligned to form a splicing cavity. At the same time, the connecting lugs 201 of adjacent unit pontoons 100 are staggered and overlapped to prepare for the subsequent assembly of the connecting components 200.

[0034] The third step is the installation of the buffer energy-absorbing component. The core of this step is to stably install the buffer energy-absorbing component 400 at the bottom of the unit pontoon 100 to ensure that it can perform its buffer energy-absorbing function normally. Specifically, the buffer energy-absorbing component 400 is hoisted to the bottom of the unit pontoon 100, and the two ends of the elastic telescopic rod 402 are fixedly connected to the bottom of the unit pontoon 100 and the perforated plate 401, respectively. The perforated plate 401 is placed within the area protected by the reinforcing rib plate 105, and an 80mm gap is left between the perforated plate 401 and the bottom of the unit pontoon 100 to ensure that the perforated plate 401 is completely submerged in water and does not participate in providing buoyancy. This completes the assembly of the buffer energy-absorbing component 400 with the unit pontoon 100.

[0035] The fourth step is the assembly of the connecting components. The core of this step is to achieve a fixed connection between adjacent unit floats 100 through the connecting components 200, ensuring the stability of the base structure after splicing. Specifically, the connecting column 202 is hoisted to the splicing cavity. First, the column body 204 is aligned with the center hole of the overlapping connecting ear plate 201, and the limiting protrusion 205 is aligned with the limiting groove. The connecting column 202 is then vertically inserted into the connecting hole 203 until the positioning head 206 is fully engaged in the positioning groove within the splicing groove, thus restricting the overlapping connecting ear plate 201 between the limiting protrusion 205 and the positioning head 206. Next, the connecting column 202 is rotated to 45°, so that the limiting protrusion 205 and the positioning head 206 are aligned. The slots are misaligned to achieve axial positioning of the connecting column 202 and the connecting ear plate 201; finally, according to the actual height of the overlapping connecting ear plate 201, the axial position of the threaded sleeve 208 on the column 204 is adjusted by rotation, which drives the sliding sleeve 207 to move along the column 204, so that the distance between the limiting protrusion 205 and the positioning column head 206 is precisely matched with the actual height of the overlapping connecting ear plate 201, thus completing the assembly of the connecting component 200 and realizing the fixed connection of the adjacent unit floats 100.

[0036] The fifth step is the installation of the limiting component. The core of this step is to restrict the rotation and disengagement of the connecting component 200 by using the limiting component 300, thereby further improving the splicing stability of the base. Specifically, the limiting frame is hoisted to the top of the unit float 100, and the reinforcing frame 302 of the limiting frame is fitted and snapped into the top of the unit float 100. This ensures that the limiting arc on the outer frame 301 is tightly engaged with the positioning column head 206 of the connecting column 202, restricting the rotation of the connecting column 202 and ensuring that the limiting protrusion 205 and the limiting groove are always misaligned. This completes the fixing of the limiting component 300 and prevents the connecting component 200 from disengaging from the splicing cavity.

[0037] The sixth step is overall acceptance. The core of this step is to conduct a comprehensive inspection of the completed load-bearing platform to ensure that the construction quality meets the usage requirements. Specifically, professional inspectors will conduct a comprehensive inspection of the completed load-bearing platform, focusing on the splicing and docking accuracy of the unit pontoons 100, the fixing firmness of the connecting components 200, and the fit between the limiting components 300 and the unit pontoons 100 and connecting columns 202. At the same time, the assembly position of the buffer energy-absorbing components 400 will be checked, and the degree of freedom of movement of the perforated plate 401 will be manually tested to ensure that the perforated plate 401 can flexibly generate relative displacement with the unit pontoons 100 under wave loads. After all inspection items pass the acceptance, the on-site construction of the spliced ​​composite steel plate load-bearing platform for marine floating structures is completed.

[0038] The construction method of this invention can be widely adapted to the construction of load-bearing bases for various marine floating structures. The following describes its actual application effects and adaptation methods in conjunction with two typical application scenarios: Firstly, the construction of load-bearing foundations for deep-sea aquaculture platforms. The core requirement for this application scenario is that the construction area is typically 20-50 meters deep, with strong wave impact and fast currents. The foundation must support the weight of aquaculture equipment, feed, and personnel, while also adapting to the high-salinity marine environment and resisting long-term erosion from marine loads. The construction method of this invention, through modular prefabrication in a factory, allows for the disassembly and transportation of components such as the unit pontoon 100 and connecting components 200. This avoids the inconvenience of transporting large, integral foundations at sea, significantly reducing transportation difficulty and costs, shortening offshore construction time, and lowering the safety risks of deep-sea construction. The assembled platform, through the cooperation of connecting columns 202 and connecting lugs 201 and the multiple anti-loosening measures of the limiting components 300, ensures the stability of the assembly and effectively resists the impact of strong waves and currents, preventing loosening or misalignment at the joint. The porous plate 401 of the buffer energy-absorbing component 400 is completely submerged in water, effectively dissipating wave impact energy, reducing platform sway, and preventing collision damage between the aquaculture cages and the platform. Simultaneously, the porous plate 401 can block debris carried by the current from impacting the bottom of the unit pontoon 100, protecting the platform structure. The corrosion resistance of the stainless steel / carbon steel composite plate extends the service life of the platform, meeting the long-term usage requirements of deep-sea aquaculture platforms. During specific construction, the specifications of the unit pontoon 100 can be flexibly adjusted according to the size of the aquaculture platform during factory prefabrication. On-site placement is combined with the direction of ocean currents to ensure a streamlined layout of the platform, reducing current resistance. During overall acceptance, the load-bearing capacity of the platform is additionally tested to ensure it meets the weight requirements of the aquaculture equipment and crops, guaranteeing the safe operation of aquaculture.

[0039] Secondly, the construction of the load-bearing base for offshore sightseeing platforms. The core requirements for this application scenario are that the base must possess high flatness and stability to prevent swaying that could affect passenger comfort. Simultaneously, the construction period must be minimized to reduce impact on navigation in the sea area. Furthermore, the base must have a clean appearance, good corrosion resistance, and extended service life. Combining the construction method of this invention, the standardized prefabrication and splicing process enables rapid assembly of the base, significantly shortening the construction period and reducing interference with navigation in the sea area. During the splicing process, precise alignment and adjustment of the threaded sleeve 208 ensure the flatness of the base surface, laying the foundation for the subsequent installation of sightseeing railings, sunshades, etc. The buffer energy-absorbing component 400 effectively reduces the swaying amplitude of the base, improving passenger comfort. At the same time, the corrosion resistance of the stainless steel / carbon steel composite plate prevents rust from long-term exposure to the marine environment, ensuring a clean appearance for the base. During the actual construction process, installation holes can be reserved at the top of the limiting frame to facilitate the subsequent installation of sightseeing railings and sunshade facilities, thus achieving a connection between the construction and the installation of subsequent facilities. During the overall acceptance, the focus is on checking the flatness and sway of the base to ensure that it meets the requirements for sightseeing use. At the same time, the splicing accuracy of the base is checked to avoid problems such as protrusions and depressions that affect the tourist experience.

[0040] In the description of this invention, the terms "an embodiment," "example," etc., refer to specific construction steps or operating methods described in connection with that embodiment or example, which are included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0041] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A construction method for a spliced ​​composite steel plate load-bearing base for a marine floating structure, characterized in that, The load-bearing base includes unit floats (100), connecting components (200), limiting components (300), and buffer energy-absorbing components (400). The unit floats (100) are hollow buoyancy structures formed by stainless steel / carbon steel composite plates, with at least three splicing slots evenly arranged around the circumference. Adjacent unit floats (100) are connected through the splicing slots to form a splicing cavity. The connecting components (200) are disposed in the splicing cavity to connect adjacent unit floats (100). The limiting components (300) connect the unit floats (100) and the connecting components (200) to restrict the connecting components (200) from detaching from the splicing cavity. The buffer energy-absorbing components (400) are movably installed at the bottom of the unit floats (100) and configured to generate relative displacement with the unit floats (100) under wave load to dissipate wave impact energy. The construction method includes the following steps: S1. Factory prefabrication: The stainless steel / carbon steel composite steel plate is cut, bent and welded to form the panel of the unit float (100) and welded into a sealed hollow unit float (100). At least three splicing grooves are processed in the circumference of the unit float (100). At the same time, the connecting component (200), the limiting component (300) and the buffer energy absorption component (400) are prefabricated. S2. On-site transportation and placement: Transport the prefabricated unit pontoons (100), connecting components (200), limiting components (300) and buffer energy absorption components (400) to the marine construction area, and place multiple unit pontoons (100) according to the design size of the load-bearing base, so that the splicing slots of adjacent unit pontoons (100) are connected to form a splicing cavity. S3. Installation of buffer energy absorption component: Movably assemble the buffer energy absorption component (400) to the bottom of the unit float (100) to complete the connection between the buffer energy absorption component (400) and the unit float (100); S4. Assembly of connecting components: Install the connecting components (200) into the splicing cavity so that the adjacent unit floats (100) are fixedly connected through the connecting components (200); S5. Installation of limiting component: Connect the limiting component (300) between the unit float (100) and the connecting component (200) to prevent the connecting component (200) from coming out of the splicing cavity; S6. Overall acceptance: Check the splicing status of the unit pontoon (100), the fixing status of the connecting components (200), the connection status of the limiting components (300), and the assembly status of the buffer energy absorption components (400). After the acceptance is qualified, the on-site construction of the load-bearing base is completed.

2. The construction method of the spliced ​​composite steel plate load-bearing base for marine floating structures according to claim 1, characterized in that, The stainless steel / carbon steel composite plate includes an outer stainless steel layer (101), a resin filling layer (102), a carbon steel layer (103), and an inner stainless steel layer (104). The resin filling layer (102) is configured as a porous honeycomb structure. In step S1, the stainless steel / carbon steel composite plate is composited into one piece by a hot pressing composite process, and then cut, bent, and welded.

3. The construction method of the spliced ​​composite steel plate load-bearing base for marine floating structures according to claim 1, characterized in that, The connecting assembly (200) includes a connecting post (202) and a connecting lug (201) fixed at the splicing slot of the unit float (100). Adjacent connecting lugs (201) on the same unit float (100) are staggered in the height direction, and the connecting lug (201) is provided with a connecting hole (203) that cooperates with the connecting post (202). In step S2, when adjacent unit floats (100) are placed, the connecting lugs (201) are staggered and overlapped. In step S4, the connecting assembly (200) is assembled such that the connecting post (202) passes through the connecting hole (203) of the overlapped connecting lug (201) to realize the connection of adjacent unit floats (100).

4. The construction method of the spliced ​​composite steel plate load-bearing base for marine floating structures according to claim 3, characterized in that, The connecting column (202) includes a column body (204) and a limiting protrusion (205) disposed on the outer periphery of the column body (204). The connecting hole (203) includes a central hole and a limiting groove disposed on the outer periphery of the central hole. In step S4, when assembling the connecting column (202), the column body (204) is first aligned with the central hole, the limiting protrusion (205) is aligned with the limiting groove and inserted into the connecting hole (203), and then the connecting column (202) is rotated to make the limiting protrusion (205) and the limiting groove misaligned, thereby realizing the axial positioning of the connecting column (202) and the connecting ear plate (201).

5. The construction method of the spliced ​​composite steel plate load-bearing base for marine floating structures according to claim 4, characterized in that, The top of the column (204) is integrally formed with a positioning head (206), and the splicing groove is provided with a positioning groove that cooperates with the positioning head (206); in step S4, when the connecting column (202) is inserted into the connecting hole (203) until the positioning head (206) is inserted into the positioning groove, the overlapping connecting ear plate (201) is restricted between the limiting protrusion (205) and the positioning head (206).

6. The construction method of the spliced ​​composite steel plate load-bearing base for marine floating structures according to claim 4 or 5, characterized in that, The column (204) is configured as a threaded column, and a sliding sleeve (207) and a threaded sleeve (208) are fitted on the column (204). The limiting protrusion (205) is integrally formed on the surface of the sliding sleeve (207), and the threaded sleeve (208) is fitted at both ends of the sliding sleeve (207). In step S4, after the connecting column (202) is assembled, the axial position of the threaded sleeve (208) on the column (204) is adjusted to drive the sliding sleeve (207) to move, so that the distance between the limiting protrusion (205) and the positioning column head (206) is precisely matched with the actual height of the overlapping connecting ear plate (201).

7. The construction method of the spliced ​​composite steel plate load-bearing base for marine floating structures according to claim 5, characterized in that, The limiting component (300) includes a limiting frame that snaps onto the top of the unit float (100), and the limiting frame includes a limiting arc that engages circumferentially with the positioning column head (206); in step S5, the limiting component (300) is installed to snap the limiting frame onto the top of the unit float (100), so that the limiting arc engages circumferentially with the positioning column head (206) to restrict the rotation of the connecting column (202).

8. The construction method of the spliced ​​composite steel plate load-bearing base for marine floating structures according to claim 7, characterized in that, The limiting frame includes an outer frame (301) and a reinforcing frame (302) fixed inside the outer frame (301). The limiting arc is provided on the outer frame (301). In step S5, when the limiting frame is snapped onto the top of the unit float (100), the limiting frame is fixed by the cooperation between the reinforcing frame (302) and the unit float (100).

9. The construction method of the spliced ​​composite steel plate load-bearing base for marine floating structures according to claim 1, characterized in that, The buffer energy absorption assembly (400) includes a perforated plate (401) and at least one elastic telescopic rod (402) connecting the perforated plate (401) and the unit float (100). The bottom of the unit float (100) is uniformly fixed with a plurality of reinforcing ribs (105), which surround the perforated plate (401). In step S3, the buffer energy absorption assembly (400) is installed by connecting the two ends of the elastic telescopic rod (402) to the bottom of the perforated plate (401) and the unit float (100) respectively, so that there is a gap between the perforated plate (401) and the bottom of the unit float (100).

10. The construction method of the spliced ​​composite steel plate load-bearing base for marine floating structures according to claim 9, characterized in that, In step S3, the gap between the perforated plate (401) and the bottom of the unit float (100) is set to 80mm, so that the perforated plate (401) is completely submerged in water and does not participate in providing buoyancy. In step S6, the degree of freedom of movement of the perforated plate (401) is checked during the overall acceptance to ensure that the perforated plate (401) can generate relative displacement with the unit float (100) under the action of wave load.

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