Large-span ocean photovoltaic platform, construction structure and construction method of the platform

Abstract

The application discloses a large-span ocean photovoltaic platform, a construction structure and a construction method of the platform, wherein the photovoltaic platform comprises, from bottom to top, a steel pipe pile, a pile cap installed on the top of the steel pipe pile, a support truss installed on the pile cap and a photovoltaic assembly installed on the support truss; the support truss is connected by a plurality of space trusses; the space truss has upper and lower layer frame bodies, the upper layer frame body can lay photovoltaic panels, and the lower layer frame body can install transformer and other power transformation equipment and lay cables, thereby solving the problem that traditional photovoltaic power stations need to additionally and separately install power transformation equipment, and the platform has high overall bearing capacity, light self weight, can adapt to more complex ocean environment, and is convenient for early-stage installation and late-stage maintenance of the photovoltaic assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean photovoltaic technology, and particularly relates to a large-span ocean photovoltaic platform, a construction structure and a construction method of the platform. BACKGROUND

[0002] Traditional ocean photovoltaic platforms are mostly fixed photovoltaic support structures, which adopt a multi-pile frame bearing structure. The frame is a single-layer structure, and the entire platform has poor bearing capacity, which causes the ocean photovoltaic platform of this structure to have the following problems: 1. The photovoltaic equipment of the traditional ocean photovoltaic platform is easily damaged due to the complex and changeable marine environment; 2. Whether the erection of power transformation equipment or the later maintenance of photovoltaic equipment is limited by marine conditions; 3. During construction, the construction process of sinking piles-lifting support structures-installing equipment is mostly used, and the number of piles is large.

[0003] Based on the above considerations, the traditional ocean photovoltaic platform is built in the sea area close to the coast, which limits the scale of ocean photovoltaic and the development towards the deep sea to some extent, and the construction window period is long and the construction cost is high. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide a large-span ocean photovoltaic platform with strong bearing capacity.

[0005] Further, the present application also provides a construction structure of a large-span ocean photovoltaic platform.

[0006] Further, the present application also provides a construction method of a large-span ocean photovoltaic platform.

[0007] The technical scheme adopted by the present application is as follows:

[0008] The large-span ocean photovoltaic platform comprises a steel pipe pile, a pile cap installed on the top of the steel pipe pile, a support truss installed on the pile cap, and a photovoltaic assembly installed on the support truss from bottom to top; the support truss is connected by a plurality of space trusses.

[0009] Further, each space truss is formed by a plurality of planar Warren trusses connected end to end to enclose a hollow upper frame body and a lower frame body at the top and bottom of each space truss, respectively, and a plurality of support cables are installed in the upper frame body; the photovoltaic assembly comprises a photovoltaic panel, a power transformation device, and a cable connecting the photovoltaic panel and the power transformation device, the photovoltaic panel is laid along the upper frame body and located on the support cables, the power transformation device is installed on the lower frame body, and the cable is laid along the lower frame body.

[0010] Further, the application provides a construction structure of a large-span offshore photovoltaic platform, which is used for erecting the large-span offshore photovoltaic platform, and comprises a support assembly and a hoisting assembly. The support assembly comprises support legs and a jacking mechanism. The hoisting assembly comprises transverse sliding rails and a crown block used for hoisting support trusses and photovoltaic assemblies. The support legs and the jacking mechanism are respectively installed on the pile caps. The transverse sliding rails are two, which are erected on the pile caps, supported by the support legs, and can be jacked up and moved by the jacking mechanism. The crown block is installed on the transverse sliding rails and can move along the transverse sliding rails.

[0011] Further, the crown block comprises longitudinal sliding rails and a hoist. The longitudinal sliding rails are two and parallel to each other. The longitudinal sliding rails are both arranged across the transverse sliding rails and can slide along the transverse sliding rails. The hoist is slidingly installed on the longitudinal sliding rails.

[0012] Further, the crown block further comprises a transverse support and a longitudinal support. The transverse support is slidingly installed on the transverse sliding rails. The longitudinal support is fixedly installed at two ends of the longitudinal sliding rails on the transverse support. The longitudinal support is slidingly installed at two ends of the longitudinal sliding rails. The hoist is installed at a middle part of the longitudinal support.

[0013] Further, the crown block further comprises a placing plate, which is arranged across the transverse support.

[0014] Further, the jacking mechanism comprises a guide rail, a jack and a mounting seat. The guide rail is installed on the pile cap. The mounting seat is slidingly installed on the guide rail. The jack is installed on the mounting seat.

[0015] Further, the application provides a construction method of a large-span offshore photovoltaic platform, which comprises the following steps:

[0016] S1, determining a current construction area and a to-be-constructed area adjacent to the current construction area in a construction sea area;

[0017] S2, sinking piles in the current construction area and installing pile caps on each pile;

[0018] S3, installing a construction structure on the pile caps in the current construction area, wherein the construction structure is the construction structure described above;

[0019] S4, in the current construction area, hoisting support trusses and photovoltaic assemblies by a crown block of the construction structure, installing the support trusses on the pile caps, and laying the photovoltaic assemblies on the support trusses; at the same time, sinking piles in the to-be-constructed area and installing pile caps on each pile;

[0020] S5, installing support legs and a jacking mechanism on the pile caps in the to-be-constructed area;

[0021] S6. After the current construction area is completed, the jacking mechanism will continuously lift the hoisting components and move them towards the construction area until the hoisting components are erected in the construction area, thus realizing the erection of the construction structure in the construction area; at the same time, the support legs and jacking mechanism in the current construction area will be dismantled.

[0022] S7. Determine the area to be constructed in step S6 where the construction structure has been erected as the current construction area, and determine the area adjacent to the current construction area as the area to be constructed; repeat steps S4 to S6 until the construction of the photovoltaic platform in the entire construction sea area is completed.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0025] Figure 1 This is a schematic diagram of the structure of the large-span marine photovoltaic platform provided in Embodiment 1 of this application;

[0026] Figure 2 This is a schematic diagram of the supporting truss provided in Embodiment 1 of this application;

[0027] Figure 3 This is a schematic diagram of the space truss structure provided in Embodiment 1 of this application;

[0028] Figure 4 This is a schematic diagram of the construction structure of the large-span marine photovoltaic platform provided in Embodiment 2 of this application;

[0029] Figure 5 for Figure 4 Enlarged view of part A;

[0030] Figure 6 This is a schematic diagram of the installation structure of the support component provided in Embodiment 2 of this application.

[0031] Among them, steel pipe pile 1, pile cap 2, support truss 3, Hualun truss 31, support cable 32, photovoltaic panel 4, support leg 5, jacking mechanism 6, guide rail 61, mounting base 62, jack 63, transverse slide rail 7, overhead crane 8, transverse support 81, longitudinal slide rail 82, longitudinal support 83, crane 84, and storage plate 85. Detailed Implementation

[0032] The technical solutions of the present application will be described in detail below in conjunction with specific embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, but cannot limit the protection scope of the present application.

[0033] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meanings understood by the skilled in the art to which the present application belongs.

[0034] Embodiment 1

[0035] Referring to Figures 1-3 , the present embodiment provides a large-span offshore photovoltaic platform, which comprises, from bottom to top, a steel pipe pile 1, a pile cap 2 installed on the top of the steel pipe pile 1, a support truss 3 installed on the pile cap 2, and a photovoltaic assembly installed on the support truss 3; the support truss 3 is connected by a plurality of space trusses.

[0036] Specifically, referring to Figure 3 , the space truss is a rectangular frame structure, and the support truss 3 is connected by a plurality of space trusses. Each space truss is formed by a plurality of planar Warren trusses 31 connected end to end to enclose a space, and the planar Warren trusses 31 form the side of the space truss; a hollow upper frame body and a lower frame body are formed at the top and bottom of each space truss, respectively, and a plurality of support cables 32 are installed in the upper frame body in intervals to serve as auxiliary support. The photovoltaic assembly includes a photovoltaic panel 4, a power transformation device, and a cable connecting the photovoltaic panel 4 and the power transformation device, the photovoltaic panel 4 is laid along the upper frame body and located on the support cable 32, and is made of the Warren truss 31 and the support cable 32, the power transformation device is installed on the lower frame body, and the cable is laid along the lower frame body.

[0037] The planar Warren truss 31 can be prefabricated, assembled, and has strong bending and shearing resistance. The present embodiment connects the planar Warren truss 31 end to end to form a space truss with upper and lower frame body structures, greatly improving the carrying capacity of the space truss; a plurality of support cables 32 are arranged in the upper frame body as auxiliary structures, the cables have good corrosion resistance, and at the same time can realize lightweight design of the entire structure, reducing the cost. The photovoltaic assembly is installed on each space truss, and a plurality of space trusses are arranged and spliced in an array to form the upper structure of the photovoltaic platform of the present embodiment, and the entire upper structure falls on the pile cap 2 and is supported by the steel pipe pile 1, having strong overall carrying capacity, light weight, and being able to adapt to more complex marine environments, and the photovoltaic assembly is more convenient to install and maintain in the early stage.

[0038] The space truss adopting the structure of the embodiment has upper and lower frame bodies, the upper frame body can lay photovoltaic panels 4, and the lower frame body can install transformer and other power transformation equipment and lay cables, thereby solving the problem of separately installing power transformation equipment in traditional photovoltaic power stations.

[0039] Due to the strong bearing capacity of the marine photovoltaic platform, the marine photovoltaic platform can bear the human load generated in the later maintenance, and the space truss system can redistribute the stress internally after being partially damaged, and will not cause complete failure, so the maintenance and repair of the structure is relatively simple, and will not cause major property losses.

[0040] Embodiment 2

[0041] Referring to Figures 4-6 The embodiment provides a construction structure of a large-span marine photovoltaic platform, which is used for erecting the large-span marine photovoltaic platform of embodiment 1.

[0042] The construction structure includes a support assembly and a hoisting assembly, the support assembly includes support legs 5 and a jacking mechanism 6, and the hoisting assembly includes transverse sliding rails 7 and a trolley crane 8 used for hoisting the support truss 3 and the photovoltaic assembly; the support legs 5 and the jacking mechanism 6 are respectively installed on the pile cap 2, the transverse sliding rails 7 are two, the two transverse sliding rails 7 are erected on the pile cap 2, are supported by the support legs 5, can be jacked up and moved by the jacking mechanism 6, and the trolley crane 8 is installed on the two transverse sliding rails 7 and can move along the transverse sliding rails 7.

[0043] During construction, the above construction structure can be erected in the first construction area, the trolley crane 8 moves on the transverse sliding rails 7, the support truss 3 and the photovoltaic assembly are continuously hoisted, and the installation of the support truss 3 and the photovoltaic assembly is performed; after the installation is completed, the transverse sliding rails 7 can be jacked up and moved to the second construction area adjacent to the first construction area by the jacking mechanism 6, after the transverse sliding rails 7 are completely moved to the second construction area, the trolley crane 8 moves on the transverse sliding rails 7, the support truss 3 and the photovoltaic assembly are hoisted, and the installation of the support truss 3 and the photovoltaic assembly in the second construction area is realized.

[0044] By using the above construction structure, the pile sinking construction of the second construction area can be simultaneously performed when the first construction area is constructed, the support truss 3 and the photovoltaic assembly are laid while the pile sinking is performed, the step-by-step construction of the photovoltaic platform construction is realized, and the window period of the pile sinking construction is greatly reduced.

[0045] The trolley crane 8 includes longitudinal sliding rails 82 and a hoist 84, the longitudinal sliding rails 82 are two parallel rails, the two longitudinal sliding rails 82 are both arranged across the transverse sliding rails 7 and can slide along the transverse sliding rails 7, and the hoist 84 is slidingly installed on the longitudinal sliding rails 82.

[0046] Specifically, the crown block 8 further comprises two groups of transverse supports 81 and a longitudinal support 83. The two groups of transverse supports 81 are respectively slidably installed on the corresponding transverse slide rails 7. The longitudinal slide rails 82 are respectively fixedly installed on the corresponding transverse supports 81 at two ends and are arranged across the two groups of transverse supports 81. The longitudinal support 83 is slidably installed on the corresponding longitudinal slide rail 82 at two ends and is arranged across the two longitudinal slide rails 82, so that the longitudinal support 83 can slide along the longitudinal slide rails 82. The crane 84 is installed at the middle of the longitudinal support 83.

[0047] Through the transverse slide rails 7 and the longitudinal slide rails 82, the crane 84 can move laterally along the transverse slide rails 7 and longitudinally along the longitudinal slide rails 82 in the construction area, so as to hoist the support truss 3 and the photovoltaic assembly to the required position, facilitating the installation of the support truss 3 and the photovoltaic assembly.

[0048] In order to temporarily place construction materials or equipment, the crown block 8 further comprises a storage plate 85 arranged across the transverse supports 81. The two ends of the storage plate 85 are respectively fixed to the corresponding transverse supports 81.

[0049] The jacking mechanism 6 is a commercially available product. For example, a KET-B walking type intelligent jacking hydraulic system produced by Jiangsu Kaint Mechanical Equipment Manufacturing Co., Ltd. can be used. The jacking mechanism 6 comprises a guide rail 61, a jack 63 and a mounting seat 62. The guide rail 61 is installed on the pile cap 2. The mounting seat 62 is slidably installed on the guide rail 61. The jack 63 is installed on the mounting seat 62.

[0050] The jacking mechanism 6 is used to jack up and move the transverse slide rails 7. In operation, the transverse slide rails 7 are first jacked up by the jack 63 and are suspended above the support legs 5. Then, the mounting seat 62 is slid to drive the jack 63 and the transverse slide rails 7 supported by the jack 63 to move a certain distance along the guide rail 61. After the movement is completed, the jack 63 is retracted, the transverse slide rails 7 are lowered onto the corresponding support legs 5, and then the mounting seat 62 drives the jack 63 to return to the original position, thereby completing the movement of the transverse slide rails 7. Through repeated jacking of the jack 63, movement of the mounting seat 62, retraction of the jack 63 and return of the mounting seat 62, the transverse slide rails 7 can be moved to the next construction area, the hoisting assembly can be moved and erected on the next construction area, and the platform construction of the next construction area can be realized.

[0051] During construction, the steel pipe pile 1 supports the entire construction structure through the pile cap 2 installed thereon. After the construction is completed, the steel pipe pile 1 supports the support truss 3 and the photovoltaic assembly of the upper part of the photovoltaic platform through the pile cap 2 installed thereon.

[0052] The support assembly of the construction structure can be installed on the pile cap 2 at the corresponding position according to the spacing between the two transverse sliding rails 7, so as to ensure that the spacing between the two adjacent support legs 5 and the spacing between the two adjacent pushing mechanisms 6 are equal.

[0053] The installation direction of the guide rail 61 of the pushing mechanism 6 can be set according to the actual construction area. The guide rail 61 can be arranged in the transverse direction to realize the transverse movement of the transverse sliding rail 7, or can be arranged in the longitudinal direction to realize the longitudinal movement of the transverse sliding rail 7.

[0054] Embodiment 3

[0055] The embodiment provides a construction method of a large-span offshore photovoltaic platform, which comprises the following steps:

[0056] S1, determining a current construction area and a to-be-constructed area adjacent to the current construction area in a construction sea area.

[0057] The current construction area is an area in which the photovoltaic platform is currently constructed, and the to-be-constructed area is an area in which the photovoltaic platform is next constructed. After the construction of the first current construction area is completed, the first to-be-constructed area becomes the second current construction area, and an area adjacent to the second current construction area is determined as the second to-be-constructed area. This is repeated until the installation and construction of the photovoltaic platform are completed.

[0058] S2, sinking piles in the current construction area and installing pile caps 2 on each pile.

[0059] The pile sinking construction of the steel pipe pile 1 is performed in the current construction area, and the pile cap 2 is installed on each steel pipe pile 1. The steel pipe piles 1 are arranged in an array, and the spacing between the steel pipe piles 1 is determined according to the design of the photovoltaic platform.

[0060] S3, installing a construction structure on the pile caps 2 in the current construction area, the construction structure being the construction structure of embodiment 2.

[0061] Specifically, according to the spacing between the two transverse sliding rails 7, the pile caps 2 on which the support assemblies need to be installed are determined, and the support assemblies are respectively installed on the corresponding pile caps 2.

[0062] In an exemplary embodiment, three rows of steel pipe piles 1 are arranged in an array in the transverse direction and six columns of steel pipe piles 1 are arranged in the longitudinal direction in the current construction area, a total of eighteen steel pipe piles 1, and the pile cap 2 is installed on each steel pipe pile 1; according to the spacing between the two transverse sliding rails 7, the support legs 5 and the pushing mechanisms 6 are respectively installed on the pile caps 2 in the first row and the third row, and the pile caps 2 in the second row are not installed; the two transverse sliding rails 7 are respectively laid on the support legs 5 in the first row and the third row and are supported by the corresponding support legs 5, the pushing mechanism 6 is located below the corresponding transverse sliding rail 7, the guide rail 61 of the pushing mechanism 6 is arranged along the length direction of the transverse sliding rail 7 and is consistent with the direction of the transverse sliding rail 7.

[0063] The trolley 8 is arranged on the lateral slide rail 7, and the lateral support 81 of the trolley 8 is slidably arranged on the two lateral slide rails 7, so as to complete the erection of the construction structure.

[0064] S4, in the current construction area, the support truss 3 and the photovoltaic module are hoisted by the trolley 8 of the construction structure, the support truss 3 is installed on the pile cap 2, and the photovoltaic module is laid on the support truss 3; at the same time, the pile sinking is carried out in the to-be-constructed area, and the pile cap 2 is installed on each pile.

[0065] After the construction structure is erected in the current construction area, the installation and construction of the photovoltaic platform in the current construction area can be carried out. During the installation, the support truss 3 and the photovoltaic module are hoisted by the trolley 8, the assembly of the support truss 3 and the installation of the photovoltaic module are completed according to the structure of the embodiment 1.

[0066] When the installation and construction of the photovoltaic platform in the current construction area are carried out, the pile sinking and the installation of the pile cap 2 can be carried out in the to-be-constructed area at the same time, so as to reduce the construction window period.

[0067] S5, the support leg 5 and the jacking mechanism 6 are installed on the pile cap 2 in the to-be-constructed area.

[0068] The installation of the support leg 5 and the jacking mechanism 6 can be carried out at the same time as the installation of the photovoltaic platform in the current construction area, or can be carried out after the installation of the photovoltaic platform in the current construction area is completed.

[0069] In this embodiment, after the installation of the photovoltaic platform in the current construction area is completed, the support leg 5 and the jacking mechanism 6 are installed on the pile cap 2 in the to-be-constructed area, and the lateral slide rail 7 is moved to the to-be-constructed area.

[0070] S6, after the construction in the current construction area is completed, the jacking mechanism 6 continuously jacks up the hoisting assembly and moves to the to-be-constructed area until the hoisting assembly is erected in the to-be-constructed area, so as to realize the erection of the construction structure in the to-be-constructed area; at the same time, the support leg 5 and the jacking mechanism 6 in the current construction area are removed.

[0071] Specifically, after the installation in the current construction area is completed, the lateral slide rail 7 is jacked up by the jacking mechanism 6 in the current construction area, and is moved by the distance of one column of steel pipe piles 1 to the to-be-constructed area; after being moved to the position, the jack 63 of the jacking mechanism 6 is retracted, the front end of the lateral slide rail 7 falls on the first column of support legs 5 in the to-be-constructed area, and is supported by the corresponding support legs 5 in the current construction area and the to-be-constructed area, the jacking mechanism 6 is returned, and the step-by-step movement of the hoisting assembly is completed; thus, the jacking mechanism 6 corresponding to the lateral slide rail 7 is continuously jacked up, retracted and returned, until the hoisting assembly is completely moved to the to-be-constructed area, so as to realize the erection of the construction structure in the to-be-constructed area.

[0072] During construction, the support legs 5 and the pushing mechanism 6 in the current construction area can be removed while moving the construction structure, or the support legs 5 in the current construction area can be removed after the construction structure is moved to the to-be-constructed area.

[0073] S7, determining the to-be-constructed area in which the construction structure is erected in step S6 as the current construction area, and determining the area adjacent to the current construction area as the to-be-constructed area; repeating steps S4-S6 until the construction of the photovoltaic platform in the entire construction sea area is completed.

[0074] When the entire construction structure is moved to the first to-be-constructed area, the first to-be-constructed area in which the construction structure is erected in step S6 is determined as the second current construction area, and the area adjacent to the second current construction area is determined as the second to-be-constructed area; the installation of the photovoltaic platform is performed in the second current construction area, and the sinking of the steel pipe pile 1 and the installation of the pile cap 2 are performed in the second to-be-constructed area. This is repeated until the construction of the photovoltaic platform in the entire construction sea area is completed, and then the construction structure is removed.

[0075] The construction method of the embodiment can realize the erection of the walking construction structure from the near sea to the far sea, and the installation of the photovoltaic platform is performed while the construction structure is erected, so as to realize the construction and construction of the large-span marine photovoltaic platform from the near sea to the far sea, reduce the construction window period, and reduce the influence on the marine environment.

[0076] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrated; can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0077] In the specification of the present application, a large number of specific details are explained. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, systems and techniques are not shown in detail in order not to obscure the understanding of the present specification.

[0078] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, systems, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, systems, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction, and the combination.

[0079] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. The construction structure of a large-span marine photovoltaic platform, characterized in that, This construction structure is used to erect a large-span marine photovoltaic platform. The platform, from bottom to top, includes steel pipe piles, pile caps installed on top of the steel pipe piles, a support truss installed on the pile caps, and photovoltaic modules installed on the support truss. The support truss is composed of multiple spatial trusses connected together. The construction structure includes a support assembly and a hoisting assembly. The support assembly includes support legs and a jacking mechanism. The hoisting assembly includes transverse slide rails and a trolley for hoisting the support truss and photovoltaic modules. The support legs and the jacking mechanism are respectively installed on the pile caps. There are two transverse slide rails, which are erected on the pile caps, supported by the support legs, and can be lifted and moved by the jacking mechanism. The trolley is installed on the two transverse slide rails and can move along them.

2. The construction structure of the large-span marine photovoltaic platform according to claim 1, characterized in that, Each of the aforementioned spatial trusses is formed by multiple planar Warren trusses connected end to end. A hollow upper frame and a hollow lower frame are formed at the top and bottom of each spatial truss, respectively. Multiple support cables are installed at intervals within the upper frame. The photovoltaic module includes a photovoltaic panel, a power transmission device, and cables connecting the photovoltaic panel and the power transmission device. The photovoltaic panel is laid along the upper frame and located on the support cables. The power transmission device is installed on the lower frame, and the cables are laid along the lower frame.

3. The construction structure of the large-span marine photovoltaic platform according to claim 1, characterized in that, The overhead crane includes a longitudinal slide rail and a crane. The longitudinal slide rail consists of two parallel rails, both of which straddle the transverse slide rail and can slide along the transverse slide rail. The crane is slidably mounted on the longitudinal slide rail.

4. The construction structure of the large-span marine photovoltaic platform according to claim 3, characterized in that, The overhead crane also includes a transverse support and a longitudinal support. The transverse support is slidably mounted on the transverse slide rail. Both ends of the longitudinal slide rail are respectively fixedly mounted on the transverse support. Both ends of the longitudinal support are slidably mounted on the longitudinal slide rail. The crane is mounted in the middle of the longitudinal support.

5. The construction structure of the large-span marine photovoltaic platform according to claim 4, characterized in that, The overhead crane also includes a storage platform that spans across the transverse support.

6. The construction structure of the large-span marine photovoltaic platform according to claim 1, characterized in that, The jacking mechanism includes a guide rail, a jack, and a mounting base. The guide rail is mounted on the pile cap, the mounting base is slidably mounted on the guide rail, and the jack is mounted on the mounting base.

7. A construction method for a large-span marine photovoltaic platform, characterized in that, Includes the following steps: S1. Determine the current construction area and the adjacent construction area within the construction sea area; S2. Drive piles in the current construction area and install pile caps on each pile; S3. Install the construction structure on the pile cap in the current construction area, wherein the construction structure is the construction structure according to any one of claims 1 to 6; S4. Within the current construction area, the supporting truss and photovoltaic modules are lifted using a crane on the construction structure. The supporting truss is then installed on the pile caps, and the photovoltaic modules are laid on the supporting truss. Simultaneously, piles are driven in the area to be constructed, and pile caps are installed on each pile. S5. Install support legs and jacking mechanism on the pile caps in the area to be constructed; S6. After the current construction area is completed, the jacking mechanism will continuously lift the hoisting components and move them towards the construction area until the hoisting components are erected in the construction area, thus realizing the erection of the construction structure in the construction area; at the same time, the support legs and jacking mechanism in the current construction area will be dismantled. S7. Determine the area to be constructed in step S6 where the construction structure has been erected as the current construction area, and determine the area adjacent to the current construction area as the area to be constructed; repeat steps S4 to S6 until the construction of the photovoltaic platform in the entire construction sea area is completed.

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