Offshore assembled floating platform and assembly construction method thereof

Abstract

The present application provides an offshore assembled floating platform and an assembly construction method thereof, which are applied to the technical field of floating platforms, wherein the floating platform includes a plurality of spliced ​​floating modules arranged in an array and a first flexible splicing piece embedded in a first splicing cavity, wherein two adjacent floating modules respectively have a first splicing mortise and tenon extending in the longitudinal direction and penetrating at least at the upper end, the first splicing mortise and tenon being configured such that, at at least one splicing location, the two first splicing mortise and tenon grooves enclose a first splicing cavity with a gradually decreasing cross-sectional area from top to bottom, the first flexible splicing piece including a plurality of first splicing modules, the first splicing modules being adapted for mortise and tenon connection with the first splicing mortise and tenon grooves, a limiting device being provided between adjacent first splicing modules, and a locking device being provided on the top first splicing module for locking the first flexible splicing piece in a retracted state, the floating platform being easy to assemble and construct and having good maintainability, and the assembly construction method can improve the quality of splicing work.

Description

Technical Field

[0001] The present application relates to the technical field of floating platforms, and in particular to an offshore assembled floating platform and an assembly construction method thereof. Background Art

[0002] Traditional floating platforms typically utilize a fixed structural design, making it difficult to flexibly adjust the platform's size and functionality to meet project requirements. This design model not only increases construction and maintenance costs but also limits the platform's suitability in diverse marine environments. Furthermore, traditional platform construction wastes resources and impacts construction schedules. Therefore, developing a modular floating platform that can be assembled into varying sizes through modular design, allowing for flexible assembly of varying units based on specific needs, has become a pressing challenge.

[0003] To address this, a Chinese patent application, published on August 23, 2022, and numbered CN217260591U, proposes an aquatic floating platform structure comprised of multiple concrete floating modules arranged in an array and connected by mortise and tenon joints. The bottom of each concrete floating module is anchored by tensioning cables. During the aquatic mortise and tenon jointing operation, the concrete floating modules to be connected are first transported to the water surface. Buoyancy is then used to float the modules on the water surface. Based on the mortise and tenon joints between the modules, the modules are then towed to the desired connection position. The height difference between the two modules is then adjusted using a counterweight until the mortise and tenon joints of one module can be connected to the other. The two adjacent modules are then secured in relative position using the interlocking force of the mortise and tenon joints.

[0004] Although this solution can achieve modular assembly of floating platforms and, to a certain extent, address the lack of adaptability and flexibility of existing floating platforms, during the construction phase of the floating platform, it is necessary to use a counterweight method or a loading method to create a height difference between the two concrete floating modules before the mortise and tenon joints between the floating modules can be completed. This obviously increases the construction difficulty. Furthermore, the mortise and tenon joints used for the mortise and tenon joints are all fixed to the bulkheads of the floating modules, which makes the mortise and tenon joint structure less maintainable. Precisely because the mortise and tenon joints on both sides of the floating modules have opposite longitudinal mortise and tenon joint directions, this means that the mortise and tenon joint structure on only one side can provide support strength for the floating module. Therefore, when the load is heavy, the mortise and tenon joint structure on that side will inevitably experience greater stress concentration, making it prone to deformation or even failure and fracture. Summary of the Invention

[0005] In view of this, the embodiments of this specification provide an offshore assembled floating platform and an assembly and construction method thereof. The floating platform has the advantages of easy assembly and construction and good maintainability, and the construction method has the advantages of being able to improve the quality of splicing operations and construction convenience.

[0006] The embodiments of this specification provide the following technical solutions:

[0007] The embodiment of the present specification first provides an offshore assembled floating platform, comprising: a plurality of spliced ​​floating modules arranged in an array, wherein two adjacent floating modules respectively have a first splicing groove extending in the longitudinal direction and penetrating at least the upper end, the first splicing groove being configured to have a taper and, at at least one splicing point, the two first splicing grooves enclose a first splicing cavity with a cross-sectional area gradually decreasing from top to bottom; a first flexible splicing piece embedded in the first splicing cavity, configured to be convertible between an extended state and a contracted state, the first flexible splicing piece comprising a plurality of first splicing modules that gradually decrease in size from top to bottom and are sequentially connected in series, wherein in the extended state, the plurality of first splicing modules are spaced apart in the longitudinal direction. The first splicing module is suitable for being connected with the first splicing mortise and tenon joints; the first splicing cavity is configured to be able to convert the first flexible splicing piece from an extended state to a contracted state while receiving the first flexible splicing piece, and a limiting device is provided between adjacent first splicing modules, and the limiting device is configured to combine with the cavity wall of the first splicing cavity in response to the first flexible splicing piece being converted from an extended state to a contracted state so as to limit the relative position of the mutually spliced ​​floating modules in the longitudinal direction, and to disengage from the cavity wall of the first splicing cavity in response to the first flexible splicing piece being converted from a contracted state to an extended state, and a locking device for locking the first flexible splicing piece in the contracted state is provided on the top of the first splicing module.

[0008] In order to optimize this technical solution, the following technical measures are also taken:

[0009] Preferably, the floating module is prefabricated and has an overall regular N-prism shape, where N is 3, 4, or 6. The upper end surface of the floating module is used to define the table top of the floating platform, and the first splicing groove is formed on the side of the floating module.

[0010] Preferably, a second splicing mortise and tenon extending longitudinally and penetrating at least the upper end is formed at the side edge of the floating module, the second splicing mortise and tenon being constructed to have a taper and, at at least one splicing point, a plurality of the second splicing mortise and tenon forming a second splicing cavity with a cross-sectional area gradually decreasing from top to bottom; the floating platform further comprises a second flexible splicing piece embedded in the second splicing cavity, which is configured to be convertible between an extended state and a contracted state, comprising a plurality of second splicing modules which are gradually reduced in size from top to bottom and are connected in series in sequence, wherein in the extended state, the plurality of second splicing modules are spaced apart in the longitudinal direction, and the second splicing modules are suitable for mortise and tenon connection with the second splicing mortise and tenon, wherein the second splicing cavity is configured to convert the second flexible splicing piece from an extended state to a contracted state while receiving the second flexible splicing piece, and the second splicing mortise and tenon is a C-shaped groove.

[0011] Preferably, the first splicing groove is a C-shaped groove or a dovetail groove.

[0012] Preferably, the limiting device is detachably mounted on the corresponding first splicing module.

[0013] Preferably, the limiting device includes two first limiting pins arranged relatively to each other in the transverse direction inside the lower first splicing module and a first push rod arranged on the upper first splicing module, the first limiting pins being configured to be movable between an insertion position and a disengagement position, wherein at the insertion position the first limiting pin is inserted into the cavity wall of the first splicing cavity, and at the disengagement position the first limiting pin is disengaged from the cavity wall of the first splicing cavity, the first push rod being configured to move downward in response to the first flexible splicing piece being converted from an extended state to a contracted state and to push the first limiting pin in the lower first splicing module through a wedge mechanism to move it from the disengagement position to the insertion position, the first limiting pin being spring-loaded to always return to the disengagement position when disengaged from the corresponding first push rod.

[0014] Preferably, the locking device includes two second limit pins arranged laterally opposite to each other inside the first splicing module at the top and a second push rod detachably connected to the first splicing module at the top, the second limit pins being configured to be movable between an insertion position and a disengagement position, wherein at the insertion position the second limit pin is inserted into the cavity wall of the first splicing cavity, and at the disengagement position the second limit pin is disengaged from the cavity wall of the first splicing cavity, the second push rod is detachably coupled to the second limit pin, and the second push rod is configured to be able to apply force to the second limit pin in a direction to keep the second limit pin in the insertion position in the coupled state, the second limit pin is spring-loaded to always return to the disengagement position when disengaged from the corresponding second push rod.

[0015] Preferably, the second push rod is connected to the first splicing module at the top by a thread, and the lower end of the second push rod is combined with the second limiting pin by an inclined wedge mechanism.

[0016] Preferably, the second push rod can also be connected to the first splicing module at the top through magnetic force, and the lower end of the second push rod is combined with the second limiting pin through an inclined wedge mechanism.

[0017] The embodiments of this specification also provide a method for assembling and constructing the above-mentioned offshore assembled floating platform, comprising the following steps:

[0018] The outline of the floating platform is formed by arranging the plurality of floating modules in an array according to the design requirements and constraining the relative positions of the floating modules so that a first splicing cavity is formed between the first splicing grooves of adjacent floating modules and a second splicing cavity is formed between the second splicing grooves;

[0019] Assembling the first flexible splicing piece, specifically: unlocking the locking device, and installing each of the limiting devices between corresponding adjacent first splicing modules;

[0020] Embedding the first flexible splicing piece, specifically: hanging the first flexible splicing piece in the extended state into the corresponding first splicing cavity, adjusting the posture and position of each first splicing module during the hanging process so that each first splicing module is respectively embedded at a different depth position in the splicing cavity, ensuring that the first flexible splicing piece enters a contracted state, and at the same time, each limiting device is engaged with the cavity wall of the first splicing cavity, and at this time, the locking device is activated to lock the current state of the first flexible splicing piece;

[0021] Embedding the second flexible splicing piece specifically involves hanging the second flexible splicing piece in an extended state into the corresponding second splicing cavity, and adjusting the posture and position of each second splicing module during the hanging process so that each second splicing module is respectively embedded at a different depth position in the splicing cavity, ensuring that the second flexible splicing piece enters a contracted state.

[0022] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0023] First, in the provided floating platform, at least one joint, the present embodiment connects two adjacent floating modules together by means of an additional first flexible splicing piece, without the need to use a counterweight method to perform longitudinal alignment of each floating module, and without the need to directly perform mortise and tenon joints on adjacent floating modules. The splicing operation of adjacent modules can be completed by simply embedding the first flexible splicing piece in the first splicing cavity and controlling the locking device to be in a locked state. In this process, thanks to the tapered design of the first splicing cavity and the shape matching of the first flexible splicing piece with the first splicing cavity, not only the first flexible splicing piece is The alignment of the splicing piece with the first splicing cavity is significantly simplified. Furthermore, the first flexible splicing piece can be transformed from an extended state to a retracted state within the first splicing cavity, triggering the limiting device on each floating module to engage the cavity wall of the first splicing cavity, thereby defining the relative longitudinal position of two adjacent modules. Furthermore, because each floating module and the first splicing groove are connected by mortise and tenon joints, the relative transverse position of two adjacent modules can also be defined. Compared to directly mortise and tenon joints to define the relative position of floating modules at sea, this greatly simplifies the splicing and assembly process between modules, reducing construction difficulty. Conversely, operators can simply release the locking device to salvage the first flexible splicing piece from the first splicing cavity for later maintenance.

[0024] Furthermore, in the provided assembly construction method, the floating modules are first arranged and assembled into the outer contour of the floating platform. Constraints, such as high-strength lashing ropes, are then used to constrain the relative positions of the floating modules. The assembled first flexible splicing pieces are then embedded in corresponding first splicing cavities to complete the side splicing of adjacent floating modules. At this point, the relative positions of the floating modules are defined. Second flexible splicing pieces are then hoisted into corresponding second splicing cavities to complete the splicing of adjacent floating modules in the array at the side edges, optimizing the stress conditions at these edges. Compared to traditional approaches, this method follows the principle of first constructing the overall contour and then performing node splicing, effectively avoiding contour deformation caused by splicing misalignment. This principle also allows for a reasonable arrangement of the splicing sequence of the first and second flexible splicing pieces. Once the first flexible splicing pieces have been completed, the relative positions of the floating modules are essentially defined, allowing the floating platform to serve as a support base, facilitating the splicing of the second flexible splicing pieces and significantly improving construction convenience and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 Schematic diagram of the splicing structure of the floating platform in Example 1;

[0027] Figure 2 is a cross-sectional schematic diagram of the first flexible splicing element in the first embodiment when it is in an extended state;

[0028] Figure 3 is a cross-sectional schematic diagram of the first flexible splicing element in the first embodiment when it is in a contracted state;

[0029] Figure 4 This is a schematic diagram of the coordination of the limiting device and its related components in Example 1;

[0030] Figure 5 This is a schematic diagram of the locking device and its related components in Example 1;

[0031] Figure 6 is a schematic structural diagram of the first flexible splicing piece in Example 1;

[0032] Figure 7 is a schematic structural diagram of the second flexible splicing piece in the second embodiment;

[0033] Figure 8 Schematic diagram of the installation structure of the limiting device in Example 1;

[0034] Figure 9 This is a schematic diagram of the splicing structure of the regular triangular prism-shaped floating modules in Example 2;

[0035] Figure 10 This is a schematic diagram of the splicing structure of the regular quadrangular prism-shaped floating modules in Example 2;

[0036] Figure 11 It is a flow chart of the floating platform assembly construction method in Example 3.

[0037] Reference numerals

[0038] 100. Floating platform; 1. Floating module; 2. First splicing mortise and tenon; 21. First plug-in recess; 22. Second plug-in recess; 3. First flexible splicing piece; 31. First splicing module; 311. Matching slope; 312. Mounting groove; 313. Embedding portion; 32. Limiting device; 321. First positioning sleeve; 322. First limiting latch; 323. First spring; 33. First push rod; 34. Locking device; 341. Second positioning sleeve; 342. Second limiting latch; 343. Second spring; 35. Second push rod; 36. First chain; 4. Second splicing mortise and tenon; 5. Second flexible splicing piece; 51. Second splicing module; 52. Second chain. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0040] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0041] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0042] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0043] The embodiments of this specification propose an offshore assembled floating platform and its assembly and construction method, which aim to solve the problems of difficult module splicing construction and poor maintainability of existing modular assembled floating platforms. It can not only reduce the difficulty of splicing operations between floating modules and improve construction efficiency, but also enhance the structural strength and support stability of the entire floating platform after assembly.

[0044] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0045] Example 1

[0046] like Figures 1 to 3 As shown, this embodiment first proposes an offshore assembled floating platform 100, comprising a plurality of connectable floating modules 1 arranged in an array. Here, the connectable floating modules 1 refer to modular units that can be connected to form a temporary or permanent floating platform 100, wherein the connection can be a threaded connection, a magnetic connection, a mortise and tenon connection, etc. The floating modules 1 can be hollow structures, such as a buoy structure with a hollow inner cavity, or solid structures, without limitation. Figure 1 The floating platform 100 is constructed using regular hexagonal prism-shaped, connectable floating modules 1. Two adjacent floating modules 1 each have a first splicing groove 2 extending longitudinally and extending through at least their upper ends. The first splicing grooves are preferably arranged to extend through both the upper and lower ends to distribute the load at the joint and reduce stress concentration. The bottom surfaces of the first splicing grooves 2 are configured to gradually slope outward from top to bottom, thereby forming a first splicing cavity between the two first splicing grooves 2 at the joint, with the cross-sectional area gradually decreasing from top to bottom. "Outward" is defined as the side horizontally away from the center of the floating module 1. For the first splicing grooves 2, it can also be defined as the side horizontally toward the side notch of the splicing groove.

[0047] In this embodiment, the floating platform 100 further includes a first flexible splicing member 3 embedded in the first splicing cavity, which is configured to be switchable between an extended state and a contracted state. The first flexible splicing member 3 includes a plurality of first splicing modules 31 whose sizes gradually decrease from top to bottom and are sequentially connected in series by ropes, cables or chains, such as Figures 4 to 6As shown, multiple first splicing modules 31 are serially connected via a first chain 36. In the extended state, the multiple first splicing modules 31 are spaced apart longitudinally. Preferably, the multiple first splicing modules 31 are equally spaced longitudinally. The first splicing modules 31 are adapted for mortise and tenon connection with the first splicing groove 2, and the outer dimensions of the first splicing modules 31 are adapted to fit within the first splicing cavity. The first splicing cavity is configured to accommodate the first flexible splicing member 3 while simultaneously enabling it to transition from an extended state to a retracted state. Limiting devices 32 are provided between adjacent first splicing modules 31. The limiting devices 32 are configured to engage with the cavity wall of the first splicing cavity in response to the transition of the first flexible splicing member 3 from an extended state to a retracted state, thereby limiting the longitudinal relative position of the spliced ​​floating modules 1. Furthermore, the limiting devices 32 are configured to disengage from the cavity wall of the first splicing cavity in response to the transition of the first flexible splicing member 3 from a retracted state to an extended state. A locking device 34 is provided on the top of the first splicing module 31 for locking the first flexible splicing member 3 in the retracted state.

[0048] In this embodiment, the two first splicing grooves 2 at the splicing position form a first splicing cavity with a tapered section area that gradually decreases from top to bottom. The multiple first splicing modules 31 embedded therein are quickly layered and positioned in the longitudinal direction by means of inclined support, so that splicing nodes can be formed at different depth positions between adjacent floating modules 1, so as to disperse the load on the splicing position in the longitudinal direction, thereby improving the overall rigidity of the floating platform 100 after assembly. At each splicing node, since the first splicing module 31 and the corresponding first splicing groove 2 are connected by mortise and tenon, the relative position of the two adjacent modules in the horizontal direction can be limited. At the same time, As the first flexible splicing member 3 transitions from an extended state to a contracted state, the limiting device 32 thereon engages with the wall of the first splicing cavity, thereby limiting the relative position of two adjacent modules in the vertical direction, i.e., the longitudinal direction. At this point, simply by using the locking device 34 on the top first splicing module 31 to lock the first flexible splicing member 3 in its current state, i.e., the contracted state, the two adjacent floating modules 1 can be completely limited, thus completing the splicing of the two adjacent modules. Since the top first splicing module 31 is relatively close to the platform surface, it is convenient for on-site construction workers to perform construction operations, which also makes it easy to operate and control the locking device 34. Compared to the prior art, this embodiment does not require the use of a counterweight method to adjust the relative position of each floating module 1. Furthermore, it does not require direct mortise and tenon joints for floating modules 1 that are severely affected by offshore buoyancy and / or wave pressure. Therefore, the splicing process of each floating module 1 can be simplified, reducing the difficulty of assembling and constructing the floating platform 100 while improving construction efficiency.

[0049] On the other hand, the operator only needs to release the locking state of the locking device 34 to salvage the first flexible splicing piece 3 from the first splicing cavity. During this process, the first flexible splicing piece 3 gradually changes from the contracted state to the original extended state, and the limiting device 32 on each first splicing module 31 gradually separates from the cavity wall of the first splicing cavity. In addition, each first splicing module 31 moves longitudinally toward the upper end of the first splicing cavity with a larger cross-sectional area, so that each first splicing module 31 can be promptly separated from the cavity wall of the first splicing cavity, reducing the difficulty of salvaging the first flexible splicing piece 3, thereby facilitating maintenance of the splicing piece. Furthermore, the flexible splicing piece is easy to store and tow at sea, which can further increase the convenience of construction.

[0050] like Figure 1 As shown, multiple floating modules 1 have the same structure and are prefabricated to increase the interchangeability and expansion convenience of each floating module 1. Here, the floating module 1 is generally in the shape of a regular hexagonal prism. Regular hexagonal prism-shaped floating modules have excellent close-packing capabilities and can seamlessly cover the entire planar space, making them the preferred choice for this embodiment. Modules with this characteristic also include regular triangular prism-shaped floating modules and regular quadrangular prism-shaped floating modules, some of whose applications are described below. The upper end surface of the floating module 1 is used to define the tabletop of the floating platform 100, and a first splicing groove 2 is formed on the side of the floating module 1. Preferably, each side of the floating module 1 is formed with a first splicing groove 2, so that the various sides of the floating module 1 can be quickly spliced ​​in response to on-site operation needs, thereby flexibly adjusting the overall size of the floating platform 100. Here, the first splicing mortise and tenon 2 is a dovetail groove. In other embodiments, the first splicing mortise and tenon 2 can also be designed as a C-shaped groove. However, considering that the dovetail groove has good guiding properties, it is convenient for the alignment installation of the first flexible splicing piece 3 and the first splicing cavity, so it becomes the preferred embodiment of this embodiment.

[0051] In this embodiment, the limiting device 32 is configured in the form of a mechanical trigger. The specific idea is that in response to the first flexible splicing piece 3 being converted from an extended state to a contracted state, the limiting device 32 is combined with the cavity wall of the first splicing cavity, that is, the outer wall of the floating module 1 to achieve a limiting effect. There are many specific forms of the limiting device 32 that can be thought of. For example, it can be a V-shaped elastic limiting arm arranged between two adjacent first splicing modules 31, which is not shown in the figure. When the first flexible splicing piece 3 is converted from an extended state to a contracted state, the adjacent first splicing modules 31 squeeze the elastic limiting arm in the middle, and the elastic limiting arm is embedded in the cavity wall of the first splicing cavity through elastic deformation to play a limiting role. When the first flexible splicing piece 3 returns to the extended state, the elastic limiting arm is separated from the cavity wall of the first splicing cavity. Since this type of elastic limiting arm is a non-standard part, it has certain difficulties in manufacturing and processing, so it is not the preferred method of this embodiment.

[0052] like Figures 2 to 4 as well as Figure 6 As shown, this embodiment also provides another specific form of a limiting device 32, which has higher reliability and is relatively easy to manufacture. The limiting device 32 includes two first limiting pins 322 relatively arranged in the lower first splicing module 31 in the transverse direction and a first push rod 33 arranged on the upper first splicing module 31. Preferably, the length of the first push rod 33 is less than the interval between the two adjacent first splicing modules 31 in the extended state or the length of the first chain 36. The first splicing mortise and tenon 2 is provided with a first plug-in recess 21 that matches the corresponding first limiting pin 322. The first limiting pin 322 is provided on the first splicing mortise and tenon 2. 22 is configured to be movable between a plug-in position and a disengagement position, wherein at the plug-in position the first limit pin 322 is inserted into the corresponding first plug-in recess 21, and at the disengagement position the first limit pin 322 is disengaged from the corresponding first plug-in recess 21, the first push rod 33 is configured to move downward in response to the first flexible splicing piece 3 being converted from an extended state to a contracted state and to push the first limit pin 322 in the first splicing module 31 below through a wedge mechanism to move it from the disengagement position to the plug-in position, the first limit pin 322 is spring-loaded to always return to the disengagement position when disengaged from the corresponding first push rod 33.

[0053] In this embodiment, the horizontal direction refers to the direction parallel to the surface of the floating platform 100. Figure 2 The longitudinal direction is perpendicular to the surface of the floating platform 100. Figure 2 In the Y direction, Figure 2 The schematic diagram roughly shows the situation when the first flexible splicing piece 3 is in the extended state and the limiting device 32 is in the disengaged position. At this time, the first limiting latch 322 is completely received in the corresponding first splicing module 31. Figure 3 and Figure 4 The schematic diagram roughly shows the first flexible splicing part 3 in the retracted state and the limit device 32 in the plug-in position, at which time the first limit pin 322 is inserted into the cavity wall of the first splicing cavity. Specifically, the side of the first splicing module 31 is provided with a mounting groove 312 that runs through it in the transverse direction, the first limit pin 322 is movably connected to the interior of the mounting groove 312, the upper portion of the first splicing module 31 is provided with an avoidance hole that is connected to the mounting groove 312, the first push rod 33 is fixed to the lower center of the corresponding first splicing module 31 and extends longitudinally, and the lower portion of the first push rod 33 is opposite to the avoidance hole on the corresponding first splicing module 31.

[0054] In this embodiment, in order to further improve the maintenance convenience of the limiting device 32, the limiting device 32 is detachably mounted on the corresponding first splicing module 31. Specifically, the first push rod 33 can be connected to the lower portion of the corresponding first splicing module 31 by threading, or connected to the lower portion of the first splicing module 31 by a fixing pin. The limiting device 32 also includes a first positioning sleeve 321 and a first spring 323. The first positioning sleeve 321 is cylindrical and has a buckle provided on its outer wall. The first splicing module 31 is provided with an embedding portion 313 that matches the buckle. The first positioning sleeve 321 is fixed in the installation groove 312 through the engagement of the buckle and the embedding portion 313. The first limiting pin 322 is slidably mounted in the first positioning sleeve 321. The outer wall of the first limiting pin 322 is provided with a first convex ring portion. The first spring 323 is connected between the first convex ring portion and the first positioning sleeve 321 and surrounds the outer circumference of the first limiting pin 322. The first limiting latch 322 has a first beveled wedge portion at one end and a first insertion portion at the other end. When the first flexible splicing member 3 transitions from an extended state to a telescopic state, the spacing between two adjacent first splicing modules 31 gradually decreases. The lower end of the first push rod 33 of the upper first splicing module 31 passes through the avoidance hole and gradually approaches and presses against the first beveled wedge portion of the lower first limiting latch 322. The beveled wedge mechanism pushes the first limiting latch 322 from the disengaged position to the engaged position. At this time, the first insertion portion is inserted into the corresponding first insertion recess 21. Conversely, when the first flexible splicing member 3 transitions from a telescopic state to an extended state, the spacing between two adjacent first splicing modules 31 gradually increases. The lower end of the first push rod 33 of the upper first splicing module 31 gradually moves away from and disengages the first beveled wedge portion of the lower first limiting latch 322. The first limiting latch 322, pulled by the first spring 323, returns from the engaged position to the disengaged position.

[0055] like Figure 2 、 Figure 3 and Figure 5 As shown, Figure 2 The figure roughly shows the situation when the second limiting latch 342 is in the disengaged position. Figure 3 and Figure 5The figure roughly shows the situation when the second limit pin 342 is in the plug-in position. In this embodiment, the locking device 34 includes two second limit pins 342 arranged laterally opposite to each other inside the first splicing module 31 at the top and a second push rod 35 detachably connected to the first splicing module 31 at the top. The second limit pin 342 is configured to be movable between a plug-in position and a disengagement position, wherein at the plug-in position, the second limit pin 342 is inserted into the cavity wall of the first splicing cavity, and at the disengagement position, the second limit pin 342 is disengaged from the cavity wall of the first splicing cavity. The second push rod 35 is detachably coupled to the second limit pin 342, and the second push rod 35 is configured to be able to apply force to the second limit pin 342 in the direction of keeping the second limit pin 342 in the plug-in position in the coupled state. The second limit pin 342 is spring-loaded to always return to the disengagement position when it is disengaged from the corresponding second push rod 35. Specifically, a second insertion recess 22 is further provided on the bottom surface of the first splicing groove 2. At the insertion position, the second limiting latch 342 is inserted into the second insertion recess 22, thereby locking the first flexible splicing piece 3 in a contracted state.

[0056] In this embodiment, to simplify the design, the locking device 34 can adopt a structure substantially identical to that of the limiting device 32, except that, in the locking device 34, the second push rod 35 is configured to apply force to the second limiting latch 342 in a direction that maintains the second limiting latch 342 in the plugged-in position. Specifically, the locking device 34 also includes a second positioning sleeve 341 and a second spring 343. The second positioning sleeve 341 is embedded and fixed inside the first splicing module 31. The second limiting latch 342 is slidably sleeved within the second positioning sleeve 341. A second convex ring portion is provided on the outer wall of the second limiting latch 342. The second spring 343 is connected between the second convex ring portion and the second positioning sleeve 341 and surrounds the outer circumference of the second limiting latch 342. The second limiting latch 342 has a second beveled wedge portion at one end and a second insertion portion at the other end. The second push rod 35 is threadedly connected to the top first splicing module 31. The lower end of the second push rod 35 forms a pressing cone, which engages the second limiting latch 342 via a beveled wedge mechanism. Specifically, by screwing the second push rod 35 downward, the pressing cone presses the second beveled wedge portion of the second limiting latch 342, thereby pushing the second limiting latch 342 from the disengaged position to the engaged position. At this time, the second insertion portion is inserted into the corresponding second insertion recess 22. Conversely, by screwing the second push rod 35 in the opposite direction to move it upward, the pressing cone disengages the second beveled wedge portion of the second limiting latch 342, and the second limiting latch 342 is reset under the pull of the spring.

[0057] As another embodiment, the second push rod 35 can also be connected to the first splicing module 31 at the top by magnetic force, and the lower end of the second push rod 35 is engaged with the second limiting pin 342 via an inclined wedge mechanism. Specifically, a push rod mounting hole is provided on the first splicing module 31 at the top, and the second push rod 35 is mounted in the push rod mounting hole. The push rod mounting hole is provided with a magnetic member for adsorbing the second push rod 35 into the push rod mounting hole.

[0058] Preferably, the first splicing module 31 is adapted to the outer dimensions of the first splicing cavity. A matching bevel 311 is formed on the outer edge of the first splicing module 31. When the first flexible splicing piece 3 is embedded in the first splicing cavity, the matching bevel 311 abuts against the cavity wall of the first splicing cavity.

[0059] Example 2

[0060] The basic structure of this embodiment is the same as that of the first embodiment, except that Figure 1 、 Figure 7 As shown, in this embodiment, a second splicing groove 4 extending longitudinally and penetrating at least the upper end is formed at the side edge of the floating module 1. Preferably, the second splicing groove 4 is penetrated at both the upper and lower ends. The second splicing groove 4 is constructed to have a taper and, at at least one splicing point, multiple second splicing grooves 4 enclose a second splicing cavity with a gradually decreasing cross-sectional area from top to bottom; the floating platform 100 also includes a second flexible splicing member 5 embedded in the second splicing cavity, which is configured to be convertible between an extended state and a contracted state, including a plurality of second splicing modules 51 that are gradually reduced in size from top to bottom and are sequentially connected in series. Preferably, the plurality of second splicing modules 51 are connected in series by a second chain 52. In the extended state, the plurality of second splicing modules 51 are connected in series. The second splicing modules 51 are spaced apart in the longitudinal direction, and the second splicing modules 51 are suitable for mortise and tenon connection with the second splicing mortise and tenon grooves 4, wherein the second splicing cavity is configured to convert the second flexible splicing member 5 from an extended state to a contracted state while receiving the second splicing mortise and tenon groove 4. The second splicing mortise and tenon groove 4 is a C-shaped groove. In this case, the second splicing modules 51 are clover-shaped. In the first embodiment, since three floating modules 1 need to be spliced ​​simultaneously at the splicing side edges to achieve full paving, each floating module 1 is provided with a second splicing mortise and tenon groove 4. In order to be able to simultaneously connect with the three second splicing mortise and tenon grooves 4 and increase the restraining force on the floating module 1 in the horizontal direction, the second splicing modules 51 are configured in a clover-shaped shape.

[0061] As has been learned in the first embodiment, floating modules 1 in the shape of regular triangular prisms, regular quadrangular prisms, or regular hexagonal prisms have excellent geometric properties and close-packing capabilities. However, if only the first flexible splicing members 3 and the first splicing cavity described in the first embodiment are used to splice the sides of each floating module 1, the following problem arises: due to the influence of seawater buoyancy and / or wave pressure from uncertain directions, the mutual compression of the floating modules 1 will generate significant stress concentration at the side edges, thereby significantly reducing the reliability of the floating modules 1. In this embodiment, the second splicing groove 4 that encloses the second splicing cavity is a C-shaped groove, and the second splicing module 51 is connected to the second splicing groove 4 by mortise and tenon, and its shape also adapts to the C-shaped groove. This not only avoids stress concentration caused by direct contact between adjacent floating modules 1 at the side edges, but also uses an arc transition between each second splicing module 51 and the corresponding second splicing groove 4, which can effectively resist marine forces from all directions, such as wave force or wave pressure, further improving the structural strength and stability of the floating platform 100.

[0062] like Figure 9 As shown, the floating platform 100 is assembled using regular triangular prism-shaped floating modules 1. Since the taper of the side edges of the regular triangular prism-shaped floating modules 1 at the joints is relatively large, the diameter of the second splicing groove 4 provided at the side edge joints should also be relatively large to minimize the occurrence of excessive local stress. In this case, six floating modules 1 are required to be spliced ​​at the side edges to achieve full paving, so the second splicing module 51 should be arranged in a six-leaf clover shape.

[0063] like Figure 10 As shown, the floating platform 100 is assembled using a floating module 1 in the shape of a regular quadrangular prism. In this case, the second assembly module 51 should be arranged in the shape of a four-leaf clover.

[0064] Preferably, at this time, a matching inclined surface that matches the shape of the second splicing cavity is formed on the side edge of the second splicing module 51.

[0065] In this embodiment, taking the second splicing module 51 as a clover-shaped example, the thickness of the second splicing module 51 at the top is related to the initial velocity of the floating platform 100, the wave frequency, the amplitude, the wave number, the depth of the location of the second splicing module 51 and the water depth, and the relationship is as follows:

[0066]

[0067] Wherein, D is the thickness of the second splicing module 51 at the top; v0 is the initial velocity of the platform; ω is the wave circular frequency; A is the wave amplitude; k is the wave number; z is the depth of the location of the second splicing module 51 at the top; d is the water depth; is the initial random phase; g is the acceleration due to gravity.

[0068] In one embodiment, the thickness relationship of the second splicing module 51 is derived as follows:

[0069] According to the small wave amplitude theory, the calculation formula of the wave height η at a distance x from the origin is as follows:

[0070]

[0071] Where A is the amplitude; k is the wave number; ω is the wave circular frequency; is the random phase at the beginning;

[0072] The acceleration a generated by the hydrodynamic load in the longitudinal direction z As follows:

[0073]

[0074] Wherein, z is the depth of the second splicing module 51; d is the water depth;

[0075] According to Newton's second law, the actual acceleration a of the second splicing module 51 at the top is as follows:

[0076]

[0077] The initial velocity of the platform is v0, and the platform motion is approximately equivalent to uniformly accelerated motion. Then, the maximum displacement H of the second splicing module 51 in the z-axis direction is as follows:

[0078]

[0079] To prevent the second splicing module 51 from popping out of the channel, that is, the second splicing cavity, its thickness D satisfies the following formula:

[0080] D≥H

[0081] In this embodiment, the radius of the first limiting latch 322 or the second limiting latch 342 is related to the density of water, the volume of the initial position platform submerged in water, and the maximum shear stress that the latch rod can withstand, and the relationship is as follows:

[0082]

[0083] Where R is the radius of the pin; ρ w is the density of water; V0 is the volume of the platform submerged in water at the initial position; τ max is the maximum shear stress that the latch rod can withstand; g is the acceleration due to gravity.

[0084] In one embodiment, the radius relationship of the first limiting pin 322 or the second limiting pin 342 is derived as follows:

[0085] The buoyancy F acting on the platform in the heave direction is approximately:

[0086] F=ρ w VgV

[0087] Where, ρ w is the density of water; g is the acceleration due to gravity; V0 is the volume of the platform submerged in water at the initial position.

[0088] The shear stress τ on the central axis of the pin is as follows:

[0089]

[0090] Where R is the radius of the pin.

[0091] To ensure structural safety, the shear stress on the central axis of the latch rod should be less than the maximum shear stress of the structure. The latch radius R satisfies the following formula:

[0092]

[0093] Where, τ max is the maximum shear stress that the latch rod can withstand.

[0094] Example 3

[0095] like Figure 11 As shown, based on the second embodiment, this embodiment further proposes an assembly construction method of the above-mentioned offshore assembled floating platform 100, which includes the following steps:

[0096] The outline of the floating platform 100 is specifically constructed by arranging the plurality of floating modules 1 in an array according to the design requirements and using restraint members to constrain the relative positions of the floating modules 1. For example, high-strength lashing ropes are used to constrain the boundaries of the arranged floating modules 1. A first splicing cavity is formed between the first splicing grooves 2 of adjacent floating modules 1, and a second splicing cavity is formed between the second splicing grooves 4.

[0097] Assemble the first flexible splicing part 3, specifically: unlock the locking device 34, and install each of the limiting devices 32 between the corresponding adjacent first splicing modules 31. For example, first install the first limiting pin 322 of each limiting device 32 in the corresponding installation groove 312. Specifically, first assemble the first limiting pin 322, the first positioning sleeve 321 and the first spring 323, and then embed the first positioning sleeve 321 in the corresponding installation groove 312 and debug the plug-in function of each first limiting pin 322, and then install the first push rod 33 on the corresponding first splicing module 31. In some methods, the first push rod 33 is fixedly connected to the first splicing module 31. The fixation can be detachable or non-detachable, which can be selected according to construction requirements.

[0098] Preferably, the method further includes providing an anchoring ring on the top first splicing module 31 for connecting cables.

[0099] It should be noted that, here, the steps of forming the outline of the floating platform 100 and assembling the first flexible splicing piece 3 can be performed simultaneously. In order to facilitate testing of the assembled first flexible splicing piece 3, as shown in FIG. Figure 11 As shown, the outline of the floating platform 100 may also be assembled first, which is not limited here.

[0100] Preferably, the sizes of the first splicing module 31 and the second splicing module 51 are determined according to the results of topology optimization.

[0101] Embedding the first flexible splicing piece 3, specifically: use a cable to hang the first flexible splicing piece 3 in the extended state into the corresponding first splicing cavity, adjust the posture and position of each first splicing module 31 during the hanging process, so that each first splicing module 31 is respectively embedded at a different depth position in the splicing cavity, ensuring that the first flexible splicing piece 3 enters the contracted state, and at the same time, each limit device 32 is combined with the cavity wall of the first splicing cavity, and at this time, the locking device 34 is activated to lock the current state of the first flexible splicing piece 3.

[0102] Under the premise of good environmental conditions, a drone can also be used to drop the first flexible splicing piece 3 into the corresponding first splicing cavity, further expanding the applicable scenarios of the assembly construction method, such as building a remote floating platform.

[0103] Embedding the second flexible splicing piece 5 is specifically as follows: using a cable to hang the second flexible splicing piece 5 in the extended state into the corresponding second splicing cavity, and adjusting the posture and position of each second splicing module 51 during the hanging process, so that each second splicing module 51 is respectively embedded at a different depth position in the splicing cavity, ensuring that the second flexible splicing piece 5 enters the contracted state.

[0104] Under the premise of good environmental conditions, a drone can also be used to place the second flexible splicing piece 5 into the corresponding second splicing cavity.

[0105] Compared to traditional solutions, this method follows the principle of first constructing the overall outline and then performing node splicing. This effectively avoids outline deformation caused by misaligned splicing. Furthermore, the positional relationship between the various splicing nodes on the platform can be utilized to ensure that the force applied to each part of the platform during the splicing process is relatively uniform, thereby maintaining the stability of the entire platform under construction. Furthermore, this principle allows for a reasonable arrangement of the splicing sequence of the first flexible splicing piece 3 and the second flexible splicing piece 5. Once the splicing operation of the first flexible splicing piece 3 has been completed, the relative positions of the various floating modules 1 are essentially defined, allowing the floating platform 100 to serve as a supporting foundation, thereby facilitating the splicing operation of the second flexible splicing piece 5, greatly improving construction convenience and efficiency.

[0106] In summary, in the above embodiment, thanks to the tapered design of the first splicing cavity and the shape matching of the first flexible splicing piece 3 with the first splicing cavity, not only is the alignment of the first flexible splicing piece 3 with the first splicing cavity greatly simplified, but the first flexible splicing piece 3 can also be triggered by the transition from an extended state to a retracted state within the first splicing cavity, triggering the stopper 32 on each floating module 1 to engage the cavity wall of the first splicing cavity to define the relative longitudinal position of two adjacent modules. Furthermore, because each floating module 1 and the first splicing groove 2 utilize a mortise and tenon connection, the relative transverse position of two adjacent modules can also be defined. Construction operators only need to control the locking device 34 of the top first splicing module 31 to lock the first flexible splicing piece 3 in the retracted state to complete the splicing of adjacent floating modules 1. Compared to the method of directly splicing floating modules 1 at sea using mortise and tenon joints, this greatly simplifies the splicing and assembly process between modules, reducing construction difficulty. Conversely, operators can simply release the locking device 34 to salvage the first flexible splicing piece 3 from the first splicing cavity for later maintenance.

[0107] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the partial description of the previous embodiments.

[0108] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An offshore assembled floating platform, characterized in that: include: A plurality of connectable floating modules are arranged in an array, wherein each of two adjacent floating modules has a first splicing groove extending longitudinally and penetrating at least at its upper end, wherein the first splicing groove is configured to have a taper and, at at least one splicing location, the two first splicing grooves enclose a first splicing cavity with a gradually decreasing cross-sectional area from top to bottom; A first flexible splicing piece embedded in the first splicing cavity is configured to be convertible between an extended state and a contracted state. The first flexible splicing piece includes a plurality of first splicing modules that are gradually reduced in size from top to bottom and are connected in series in sequence. In the extended state, the plurality of first splicing modules are spaced apart in the longitudinal direction, and the first splicing modules are suitable for being connected to the first splicing mortise and tenon joints. The first splicing cavity is configured to be able to accommodate the first flexible splicing piece while converting it from an extended state to a contracted state. A limiting device is provided between adjacent first splicing modules. The limiting device is configured to combine with the cavity wall of the first splicing cavity in response to the first flexible splicing piece converting from an extended state to a contracted state, thereby limiting the relative position of the mutually spliced ​​floating modules in the longitudinal direction, and to disengage from the cavity wall of the first splicing cavity in response to the first flexible splicing piece converting from a contracted state to an extended state. A locking device for locking the first flexible splicing piece in the contracted state is provided on the top first splicing module.

2. The offshore assembled floating platform according to claim 1, characterized in that: The floating module is prefabricated and has an overall regular N-prism shape, where N is 3, 4, or 6. The upper end surface of the floating module is used to define the table top of the floating platform, and the first splicing groove is formed on the side of the floating module.

3. The offshore assembled floating platform according to claim 2, characterized in that: A second splicing groove extending longitudinally and penetrating at least the upper end is formed at the side edge of the floating module. The second splicing groove is constructed to have a taper and, at at least one splicing point, multiple second splicing grooves form a second splicing cavity with a cross-sectional area gradually decreasing from top to bottom. The floating platform also includes a second flexible splicing piece embedded in the second splicing cavity, which is configured to be convertible between an extended state and a contracted state, including multiple second splicing modules with sizes gradually decreasing from top to bottom and connected in series in sequence. In the extended state, the multiple second splicing modules are spaced apart in the longitudinal direction, and the second splicing modules are suitable for mortise and tenon connection with the second splicing groove, wherein the second splicing cavity is configured to convert the second flexible splicing piece from an extended state to a contracted state while receiving the second flexible splicing piece, and the second splicing groove is a C-shaped groove.

4. The offshore assembled floating platform according to claim 1, characterized in that: The first splicing groove is a C-shaped groove or a dovetail groove.

5. The offshore assembled floating platform according to claim 1, characterized in that: The limiting device is detachably mounted on the corresponding first splicing module.

6. The offshore assembled floating platform according to claim 1, characterized in that: The limiting device includes two first limiting pins relatively arranged inside the lower first splicing module in the transverse direction and a first push rod arranged on the upper first splicing module, the first limiting pins being configured to be movable between an insertion position and a disengagement position, wherein at the insertion position the first limiting pin is inserted into the cavity wall of the first splicing cavity, and at the disengagement position the first limiting pin is disengaged from the cavity wall of the first splicing cavity, the first push rod being configured to move downward in response to the first flexible splicing piece being converted from an extended state to a contracted state and to push the first limiting pin in the lower first splicing module through a wedge mechanism to move it from the disengagement position to the insertion position, the first limiting pin being spring-loaded to always return to the disengagement position when disengaged from the corresponding first push rod.

7. The offshore assembled floating platform according to claim 1, characterized in that: The locking device includes two second limit pins arranged opposite to each other in the transverse direction inside the first splicing module at the top and a second push rod detachably connected to the first splicing module at the top, the second limit pins being configured to be movable between an insertion position and a disengagement position, wherein at the insertion position the second limit pin is inserted into the cavity wall of the first splicing cavity, and at the disengagement position the second limit pin is disengaged from the cavity wall of the first splicing cavity, the second push rod is detachably coupled to the second limit pin, and the second push rod is configured to be able to apply force to the second limit pin in the direction of keeping the second limit pin in the insertion position in the coupled state, the second limit pin is spring-loaded to always return to the disengagement position when disengaged from the corresponding second push rod.

8. The offshore assembled floating platform according to claim 7, characterized in that: The second push rod is connected to the first splicing module at the top through a thread, and the lower end of the second push rod is combined with the second limiting pin through an inclined wedge mechanism.

9. The offshore assembled floating platform according to claim 7, characterized in that: The second push rod can also be connected to the first splicing module at the top through magnetic force, and the lower end of the second push rod is combined with the second limiting pin through an inclined wedge mechanism.

10. An assembly construction method for an offshore assembled floating platform according to any one of claims 2 to 9, characterized in that: The steps include: The outline of the floating platform is formed by arranging the plurality of floating modules in an array according to the design requirements and constraining the relative positions of the floating modules so that a first splicing cavity is formed between the first splicing grooves of adjacent floating modules and a second splicing cavity is formed between the second splicing grooves; Assembling the first flexible splicing piece, specifically: unlocking the locking device, and installing each of the limiting devices between corresponding adjacent first splicing modules; Embedding the first flexible splicing piece, specifically: hanging the first flexible splicing piece in the extended state into the corresponding first splicing cavity, adjusting the posture and position of each first splicing module during the hanging process so that each first splicing module is respectively embedded at a different depth position in the splicing cavity, ensuring that the first flexible splicing piece enters a contracted state, and at the same time, each limiting device is engaged with the cavity wall of the first splicing cavity, and at this time, the locking device is activated to lock the current state of the first flexible splicing piece; Embedding the second flexible splicing piece specifically involves hanging the second flexible splicing piece in an extended state into the corresponding second splicing cavity, and adjusting the posture and position of each second splicing module during the hanging process so that each second splicing module is respectively embedded at a different depth position in the splicing cavity, ensuring that the second flexible splicing piece enters a contracted state.

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