Offshore photovoltaic single-column type steel platform structure, piling tool and mounting method

Abstract

The invention provides an offshore photovoltaic single-column type steel platform structure which comprises a truss structure type single-column type foundation and a net rack platform connected to the upper portion of the single-column type foundation, foundation circular pipes are vertically arranged on the periphery of the single-column type foundation, the lower section of the single-column type foundation stretches into the position below the mud surface, and the lower section of the single-column type foundation is connected with the net rack platform. A caisson is arranged on the mud surface in a surrounding manner; net frame structures are arranged on the net frame platform in a layered mode, net frame bolt-sphere joints and foundation bolt-sphere joints are arranged at the ends of all rod pieces of the net frame structures on the upper layer and the lower layer respectively, and inserting tips are vertically arranged on the column top connecting structures at the top ends of the foundation round pipes. The net rack platform is connected through the bolt-sphere joints on the net rack platform, field welding can be avoided, rapid installation of the platform is achieved, the plane of the net rack platform is regular, the surface is flat, and therefore multiple platforms can be stacked in a multi-layer mode, and the transportation efficiency is improved. And meanwhile, the net rack platform can be hoisted through the plate-column type lifting lugs, and automatic unhooking can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore photovoltaic power generation, and in particular to a single-column steel platform structure, piling tooling and installation method for offshore photovoltaics. Background Art

[0002] The integrated offshore photovoltaic support platform structure and installation method are relatively common traditional offshore photovoltaic technologies. However, these traditional technologies have the disadvantages of complex upper platform fabrication, transportation, and installation, and excessive steel consumption in the foundation. Therefore, the following issues need to be addressed for offshore photovoltaic steel platform structures:

[0003] (1) For the traditional integral offshore photovoltaic support platform, the upper platform adopts an integral space truss structure, and all rods need to be welded and anti-corrosion, which makes the production too complicated; the integral space truss structure has a high structural height and an inclined upper part, so only one upper platform can be transported at a time, and multi-layer stacking transportation cannot be achieved, resulting in excessively high transportation costs; it is difficult to achieve automatic unhooking of the plate-type lifting lug, and the hook needs to be manually released, which makes lifting inconvenient.

[0004] (2) The foundation of the traditional integral offshore photovoltaic support platform adopts an integral jacket foundation. The plane size of the foundation is too large, resulting in an excessive amount of steel used in the foundation. At the same time, the piles above the mud surface are integral, the piles are long, and the piles are cantilever structures, which are not well stressed, so the amount of steel used in the piles is also too large. Moreover, the cantilever piles have low horizontal bearing capacity, resulting in an excessively large diameter of the piles and an excessive amount of steel used in the piles. The traditional integral offshore photovoltaic support platform also has a permanent pile clamping device installed on the top of each foundation, resulting in excessive waste of work on the pile clamping device.

[0005] (3) Traditional integral offshore photovoltaic support platforms are often equipped with a spike on the upper platform to facilitate connection with the pile foundation. Since the spike cannot be directly dropped to the ground, additional transport tooling is required during transportation. This not only makes transportation inconvenient, but also makes the connection between the upper platform and the foundation inconvenient.

[0006] Therefore, it is necessary to design a single-column steel platform structure for offshore photovoltaics to solve the problems encountered in actual engineering of the above-mentioned upper platform and foundation. Summary of the Invention

[0007] The first object of the present invention is to provide a single-column steel platform structure that ensures foundation stability while facilitating the installation of the upper platform. To this end, the present invention adopts the following technical solutions:

[0008] A single-column steel platform structure for offshore photovoltaics comprises a single-column foundation of a truss structure and a grid platform connected above the single-column foundation, wherein the single-column foundation is provided with foundation circular tubes erected on all four sides thereof, the lower section of the single-column foundation extends below the mud surface, and a sinking box is installed around the mud surface; a grid structure is arranged in layers on the grid platform, and grid bolt ball nodes and foundation bolt ball nodes are respectively provided at the ends of the rods of the upper and lower grid structures, a plug tip is vertically provided on the column top connection structure at the top of the foundation circular tube, and a first socket steel plate cooperating with the plug tip is provided at the bottom of the foundation bolt ball node; a plate-column lifting ear is provided on the top of the grid bolt ball node, and a load-bearing circular tube for limiting the connection of the lifting rope is provided on the plate-column lifting ear, and the load-bearing circular tube is protruding above the photovoltaic component installed on the top of the grid platform, and a self-swinging unhooking space is reserved below the load-bearing circular tube.

[0009] Furthermore: an upper chord rod connected to the truss bolt ball node is arranged in the upper truss structure of the truss platform, a lower chord rod connected to the foundation bolt ball node is arranged in the lower truss structure of the truss platform, and a web rod is connected between the truss bolt ball node and the foundation bolt ball node; the truss platform is provided with main purlins on the top of the truss bolt ball node, and secondary purlins staggered with the main purlins are arranged on the top of the main purlins, and the photovoltaic modules are installed on the secondary purlins.

[0010] Furthermore: the truss bolt ball node is provided with a first mounting base above its first bolt ball, and the top of the first mounting base forms a first flat portion; the basic bolt ball node is provided with a second mounting base below its second bolt ball, and the bottom of the second mounting base forms a second flat portion.

[0011] Furthermore: the plate-column type lifting ear is provided with a connecting pipe erected on the first mounting platform, a connecting part higher than the photovoltaic component is provided above the connecting pipe, a main steel plate connected to the load-bearing circular tube is provided on the connecting part, and an annular sealing plate is provided on the load-bearing circular tube away from the main steel plate.

[0012] Furthermore, an inclined surface is provided on the connecting portion, and the inclined surface is inclined along the axial direction of the connecting pipe toward the outer surface side of the main steel plate to form a guide portion with a smooth transition.

[0013] Furthermore: a steel end plate connected to the plug tip is provided at the top of the column top connection structure; a basic steel plate connected to the steel end plate is provided at the bottom of the second mounting base, the first socket steel plate is provided on the basic steel plate, and a first connecting steel plate is provided between the basic steel plate and the basic bolt ball node.

[0014] Furthermore: the single-column foundation is provided with a layered area in its vertical direction, and a horizontal bar and an oblique bar are provided in the layered area, and the ends of the horizontal bar and the oblique bar are connected to the foundation circular tubes on both sides of the same side of the single-column foundation.

[0015] Furthermore: a ground-breaking column tip is provided at the bottom of the single-column foundation, and the ground-breaking column tip includes a reverse baffle in an inverted triangle shape, and a ground-breaking circular tube connected to the foundation circular tube is provided on the lower side of the reverse baffle.

[0016] The second object of the present invention is to provide a piling tool that is convenient for piling with a single-column steel platform structure. To this end, the present invention adopts the following technical solutions:

[0017] The piling tooling for a single-column steel platform structure for offshore photovoltaics includes a piling connection structure that can cooperate with the single-column foundation. The piling connection structure is provided with a connecting cap on the column top connection structure, and the bottom of the connecting cap is provided with a second socket steel plate that is plugged into and cooperates with the plug tip. The outside of the second socket steel plate is provided with a load-bearing steel plate connected to the steel end plate; the piling connection structure is provided with a crossbeam between adjacent connecting caps, and a splint is provided on the top of the connecting cap for clamping a vibrating hammer.

[0018] The third object of the present invention is to provide a method for facilitating the offshore installation of the upper platform and foundation. To this end, the present invention adopts the following technical solutions:

[0019] The installation method of a single-column steel platform structure for offshore photovoltaics includes the following steps:

[0020] S1: Prefabricate the grid platform and the single-column foundation on shore, thereby installing the caisson in the middle area of ​​the single-column foundation, installing the groundbreaking column tip at the bottom of the single-column foundation, and installing the photovoltaic modules on the upper part of the grid platform;

[0021] S2: transporting the installed grid platform and single-column foundation to a designated location in the photovoltaic field;

[0022] S3: Installing a piling connection structure on the top of the single-column foundation, fixing the connection cap on the steel end plate and engaging with the plug tip;

[0023] S4: hoisting the single-column foundation with the pile connection structure installed to a designated location, using a vibratory hammer to drive the single-column foundation to a designed elevation through the pile connection structure, and then removing the pile connection structure;

[0024] S5: The load-bearing circular tube on the plate-column lifting ear is connected by a lifting rope to lift the grid platform. The grid platform is installed and fixed on the column top connection structure of the single-column foundation by plugging the first socket steel plate into the plug tip to complete the overall installation.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention utilizes bolted ball joints on the grid platform to avoid on-site welding and enable rapid platform installation. Furthermore, the grid platform has a regular plane and a smooth surface, allowing for multiple platforms to be stacked in multiple layers, improving transportation efficiency. Furthermore, the grid platform of the present invention utilizes plate-column lifting lugs to allow the platform to be hoisted and automatically unhooked. Since it is unsafe for people on the platform if it is not secured after hoisting, there is no need to remove the hooks, greatly facilitating hoisting. Furthermore, a plug tip is provided at the top of the base circular tube, and the corresponding first socket steel plate is used on the grid platform to make the end face of the base plate flat. This allows the platform to be placed directly on the deck or on a multi-layered frame for easy transportation.

[0027] The single-column foundation of the present invention utilizes a multi-layer truss structure. Due to the small planar dimensions of the truss columns and the excellent compressive stability of the rods, the cross-sections of the rods are relatively small, resulting in a reduction in steel consumption compared to monolithic foundations. Furthermore, the single-column foundation also utilizes a multi-layer truss structure below the soil surface, eliminating the need for piles. This eliminates the unfavorable stresses associated with cantilever piles. Furthermore, the presence of diagonal and transverse rods increases the foundation's lateral and end resistance, thereby improving its bearing capacity. Consequently, compared to traditional structures, the single-column foundation provides a more balanced stress response while reducing steel consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a side elevation view of a single-column steel platform structure for offshore photovoltaics according to the present invention;

[0029] Figure 2 This is a front elevation view of a single-column steel platform structure for offshore photovoltaics according to the present invention;

[0030] Figure 3 A plan view of the grid structure of the present invention;

[0031] Figure 4 It is a front elevation view of the grid structure of the present invention;

[0032] Figure 5 It is a side elevation view of the grid structure of the present invention;

[0033] Figure 6 A plan view of the upper chord in the grid structure of the present invention;

[0034] Figure 7 A plan view of the lower chord in the grid structure of the present invention;

[0035] Figure 8 This is an elevation view of the connection between the grid structure of the present invention and the single-column foundation;

[0036] Figure 9 A plan view showing the connection between the grid structure of the present invention and the single-column foundation;

[0037] Figure 10This is a front elevation view of the bolt ball node and plate-column lifting lug of the grid structure of the present invention;

[0038] Figure 11 It is a side elevation view of the bolt ball node and plate column type lifting lug of the grid structure of the present invention;

[0039] Figure 12 It is a plan view of the plate-column lifting lug of the present invention;

[0040] Figure 13 It is an elevation view of the anti-caisson box of the present invention;

[0041] Figure 14 It is a plan view of the anti-caisson box of the present invention;

[0042] Figure 15 It is an elevation view of the earth-breaking column tip of the present invention;

[0043] Figure 16 A plan view of the top of the earth-breaking column of the present invention;

[0044] Figure 17 This is an installation elevation view of the single-column foundation connection piling connection structure of the present invention;

[0045] Figure 18 This is an installation plan view of the single-column foundation connection piling connection structure of the present invention.

[0046] The marks in the accompanying drawings are: 1-grid platform, 11-upper chord, 12-lower chord, 13-web, 14-foundation bolt ball node, 141-second bolt ball, 142-first connecting steel plate, 143-first socket steel plate, 144-foundation steel plate, 145-second connecting bolt, 15-grid bolt ball node, 151-first bolt ball, 152-connecting circular tube, 153-second connecting steel plate, 154-first connecting bolt, 16-main purlin, 17-secondary purlin, 18-plate column hanging ear, 181-main steel plate, 182-load-bearing circular tube, 183-annular sealing plate, 184-connecting pipe , 185-connecting part, 2-photovoltaic module, 3-single column foundation, 31-foundation circular tube, 32-diagonal rod, 33-cross bar, 34-column top connection structure, 341-plug tip, 342-steel end plate, 343-stiffening plate, 4-sinking box, 41-vertical baffle, 42-horizontal anti-sinking plate, 43-air vent, 5-breaking column tip, 51-breaking circular tube, 52-reverse baffle, 6-pile connection structure, 61-connecting cap, 611-load-bearing steel plate, 612-third connecting steel plate, 613-second socket steel plate, 614-third connecting bolt, 62-crossbeam, 63-plywood, 7-vibration hammer. DETAILED DESCRIPTION

[0047] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0048] like Figure 1-18 As shown, the single-column steel platform structure for offshore photovoltaics includes a truss-structured single-column foundation 3 and a grid platform 1 connected to the single-column foundation 3. The single-column foundation 3 is provided with foundation circular tubes 31 erected on its four sides. The lower section of the single-column foundation 3 extends below the mud surface and is surrounded by a mounting stop box 4 at the mud surface. A grid structure is layered on the grid platform 1, and grid bolt ball nodes 15 and foundation bolt ball nodes 14 are respectively provided at the ends of each rod of the upper and lower grid structures. A plug tip 341 is vertically provided on the column top connection structure 34 at the top of the basic circular tube 31, and a first socket steel plate 143 that cooperates with the plug tip 341 is provided at the bottom of the basic bolt ball node 14; a plate-column lifting ear 18 is provided at the top of the truss bolt ball node 15, and a load-bearing circular tube 182 for limiting the connection of the lifting rope is provided on the plate-column lifting ear 18. The load-bearing circular tube 182 is protruding above the photovoltaic component 2 installed on the top of the truss platform 1, and a self-swinging unhooking space is reserved below the load-bearing circular tube 182.

[0049] Specifically, an upper chord 11 connected to the truss bolt ball node 15 is provided in the upper truss structure of the truss platform 1, and the first bolt ball 151 of the truss bolt ball node 15 is threadedly connected and fixed to the thread at the end of the upper chord 11; a lower chord 12 connected to the foundation bolt ball node 14 is provided in the lower truss structure of the truss platform 1, and the second bolt ball 141 of the foundation bolt ball node 14 is threadedly connected and fixed to the thread of the lower chord 12; a web 13 is connected between the truss bolt ball node 15 and the foundation bolt ball node 14, so the threads at the ends of both sides of the web 13 are respectively connected and fixed to the first bolt ball 151 and the second bolt ball 141.

[0050] The grid platform 1 is provided with main purlins 16 on top of the grid bolt ball nodes 15 , and secondary purlins 17 vertically staggered with the main purlins 16 are provided on top of the main purlins 16 , and the photovoltaic modules 2 are installed on the secondary purlins 17 .

[0051] Therefore, the grid platform 1 of this embodiment is connected by bolted ball joints, avoiding the problem of on-site welding. The main purlins 16 and secondary purlins 17 are also fixed by bolts. Therefore, the grid platform 1 does not require on-site welding, which facilitates platform production. In addition, since there is no on-site welding and no need for on-site anti-corrosion spraying, the platform can be quickly installed.

[0052] In this embodiment, the truss bolt-ball node 15 has a first mounting platform above its first bolt ball 151, with a first flattened portion formed at its top. The foundation bolt-ball node 14 has a second mounting platform below its second bolt ball 141, with a second flattened portion formed at its bottom. This allows the truss platform 1 to be laid flat during transportation, its height only equal to the structural height of the truss platform 1. The regular, flat surface allows for multiple platforms to be stacked in multiple layers, improving transportation efficiency and reducing costs.

[0053] Among them, the first mounting base on the first bolt ball 151 includes a connecting circular tube 152 and a second connecting steel plate 153. The connecting circular tube 152 is welded to the first bolt ball 151, and the second connecting steel plate 153 is welded to the connecting circular tube 152, thereby supporting the main purlin 16. The second connecting steel plate 153 is connected and fixed to the main purlin 16 through the first connecting bolt 154.

[0054] The top of the column connection structure 34 is equipped with a steel end plate 342 connected to the plug tip 341. The bottom of the second mounting base is equipped with a base steel plate 144 connected to the steel end plate 342. The base steel plate 144 and the steel end plate 342 are affixed to each other and fixed together by second connecting bolts 145. The first socket steel plate 143 is mounted on the base steel plate 144. The first connecting steel plate 142 is located between the base steel plate 144 and the base bolt ball node 14. A groove is reserved at the bottom of the first connecting steel plate 142 for mounting the first socket steel plate 143. The first connecting steel plate 142 creates a certain height gap between the base steel plate 144 and the second bolt ball 141, so that the first socket steel plate 143 has sufficient height to accommodate the insertion of the plug tip 341. The first connecting steel plate 142 is welded to the second bolt ball 141 in a cross-shaped pattern.

[0055] Among them, the column top connection structure 34 has a stiffening plate 343 welded between the bottom of the steel end plate 342 and the outer surface of the base circular tube 31.

[0056] In this embodiment, it is difficult to get on the offshore platform, and it is also very unsafe for people on the platform if it is not fixed after hoisting. To avoid the above situation, a plate-column lifting lug 18 is provided to enable the grid platform 1 to be automatically unhooked during hoisting. The plate-column lifting lug 18 is provided with a connecting pipe 184 erected on the first mounting platform, and thereby an installation space for the connecting pipe 184 is reserved on the second connecting steel plate 153 for the adjacent main purlins 16. A connecting portion 185 higher than the photovoltaic module 2 is provided above the connecting pipe 184, and a main steel plate 181 connected to the load-bearing circular tube 182 is provided on the connecting portion. An annular sealing plate 183 is provided on the side of the load-bearing circular tube 182 away from the main steel plate 181, and the cross-sectional area of ​​the annular sealing plate 183 is larger than the cross-sectional area of ​​the load-bearing circular tube 182.

[0057] Among them, an inclined surface is provided on the connecting part 185, which is inclined along the axial direction of the connecting tube 184 toward the outer surface side of the main steel plate 181, and the end of the inclined surface is in contact with the outer surface of the main steel plate 181, forming a smooth transition and a guide part that is convenient for the detachment of the lifting rope.

[0058] This embodiment specifically describes the hoisting process of the grid platform 1 in conjunction with the plate-column lifting lugs 18. Two lifting ropes are respectively looped over the load-bearing circular tubes 182 on either side of the main steel plate 181. The annular sealing plates 183 on the outside of the load-bearing circular tubes 182 prevent the lifting ropes from falling off during lifting. After installation, the lifting ropes are loosened. Under their own weight, the lifting ropes slide down the inclined surface of the connecting tube 184 to the outside of the connecting tube 184. When the lifting ropes are lifted again, they have already left the load-bearing circular tube 182, thus achieving the purpose of automatic unhooking without the need for human intervention. Therefore, there is no need for human intervention to remove the hooks, greatly facilitating lifting.

[0059] In this embodiment, the single-column foundation 3 adopts a quadrilateral structure. During the pile sinking process, the single-column foundation 3 is completely sunk into the mud surface. The single-column foundation 3 is vertically divided into several layers. Crossbars 33 are horizontally arranged at the top and bottom of the layered areas. The crossbars 33 are used to divide the layers. Several diagonal bars 32 are arranged within the layered areas. The ends of the crossbars 33 and diagonal bars 32 are welded to the foundation circular tubes 31 on both sides of the same side of the single-column foundation 3.

[0060] In this embodiment, the caisson 4 comprises a vertical baffle 41 and a horizontal caisson 42, which together form a box body. The vertical baffle 41 and the horizontal caisson 42 are welded to the foundation tube 31 and the crossbar 33 in the middle region of the single-column foundation 3. Several vents 43 are defined within the horizontal caisson 42 located above the caisson 4 to vent air from the box body.

[0061] The vertical baffles 41 and the horizontal anti-sinking plates 42 greatly increase the vertical and horizontal contact areas between the single-column foundation 3 and the soil. Therefore, the vertical baffles 41 can greatly improve the horizontal bearing capacity of the single-column foundation 3, and the horizontal anti-sinking plates 42 can greatly improve the vertical bearing capacity of the single-column foundation 3. After the single-column foundation 3 is equipped with the anti-sinking box 4, its diameter can be smaller than that of a traditional pile structure design, and the insertion depth is shallower than that of a traditional pile structure, while also reducing the amount of steel used in the foundation.

[0062] In this embodiment, a ground-breaking column tip 5 is provided at the bottom of the single-column foundation 3. The ground-breaking column tip 5 includes a reverse baffle 52 in the shape of an inverted triangle. A ground-breaking circular tube 51 connected to the foundation circular tube 31 is provided on the lower side of the reverse baffle 52. The lower end of the ground-breaking circular tube 51 is pointed, and the upper end forms a triangular frame with the horizontal bar 33 of the bottom layer of the single-column foundation 3.

[0063] It should be noted that the groundbreaking column tip 5 breaks through the soil first during placement, effectively reducing soil resistance during the placement of the single-column foundation 3. After the soil rest period following placement, the soil reconsolidates, maintaining high compressive and tensile bearing capacities. Furthermore, the vertical reversing baffle 52 on the groundbreaking column tip 5 increases the horizontal contact area between the tip and the soil, creating a reverse horizontal resistance. This, combined with the horizontal resistance of the anti-caisson 4, effectively counteracts bending moments caused by wind and wave loads.

[0064] This embodiment provides a single-column steel platform structure for offshore photovoltaics with specific numerical values ​​provided for reference. The upper platform is a grid platform 1 with a length of 14.0m and a width of 14.6m. It is a two-layer grid structure. Twelve rows of photovoltaic modules 2 are arranged on the upper part of each platform, with six photovoltaic modules 2 arranged in each row. Four plate-column lifting lugs 18 are provided on the upper grid structure of the grid platform 1, and four second mounting platforms are provided on the lower grid structure of the grid platform 1. The plate-column lifting lugs 18 and the second mounting platforms are both arranged in the middle area of ​​each grid structure, and are preferably arranged in a rectangular shape (such as Figure 6-7 shown).

[0065] The lower portion of the grid platform 1 utilizes a single-column foundation 3, with circular foundation tubes 31 spaced 2.4 meters apart. Four circular foundation tubes 31 form a 2.4-meter-by-2.4-meter single-column foundation 3, totaling 27 meters in length. The 2.4-meter-by-2.4-meter single-column foundation 3 is sunk into the sea via a piling connection structure 6, and the 14.0-meter-by-14.6-meter grid platform 1 is then installed on top.

[0066] This embodiment also provides a piling fixture that can be used in conjunction with the single-column foundation 3 of the single-column steel platform structure to connect with the corresponding plug tip 341, thereby providing a safe and effective impact base for the vibratory hammer 7. The piling fixture is well adapted to various hammer types and foundation types. Furthermore, the fixture is non-permanent and reusable, thus saving steel consumption not only for the fixture but also for the foundation as a whole.

[0067] The piling tool includes a piling connection structure 6, which is provided with a connecting cap 61 on the column top connecting structure 34. The piling connection structure 6 is provided with a crossbeam 62 between adjacent connecting caps 61, and a clamping plate 63 is provided at the top of the connecting cap 61 for clamping the vibrating hammer 7. At the same time, the clamping plate 63 can be connected to the crossbeam 62 to expand the coverage range of the clamping plate 63.

[0068] The structure of the connecting cap 61 can be similar to the second mounting platform structure at the bottom of the second bolt ball 141, or other types of structures can be used to cooperate with the plug tip 341 and be fixedly connected to the steel end plate 342. In this embodiment, the top and bottom of the connecting cap 61 are both provided with load-bearing steel plates 611, with a gap between the upper and lower load-bearing steel plates 611. The upper load-bearing steel plate 611 is used to connect to the clamping plate 63, while the bottom of the lower load-bearing steel plate 611 is affixed to the steel end plate 342 and connected via a third connecting bolt 614. The load-bearing steel plate 611 is provided with a second socket steel plate 613 that plugs into the plug tip 341. A cross-shaped third connecting steel plate 612 is welded between the upper and lower load-bearing steel plates 611.

[0069] See also Figure 1-18 When assembling a single-column steel platform structure offshore, the specific steps are as follows:

[0070] S1: Prefabricate the grid platform 1 and the single-column foundation 3 on shore;

[0071] S2: Welding the anti-caisson box 4 to the middle area of ​​the single-column foundation 3, and welding the ground-breaking column tip 5 to the bottom of the single-column foundation 3;

[0072] S3: Installing photovoltaic modules 2 on the secondary purlins 17 of the grid platform 1;

[0073] S4: transporting the installed grid platform 1 and single-column foundation 3 to a designated location in the photovoltaic field;

[0074] S5: Install the piling connection structure 6 on the top of the single-column foundation 3, install and fix the connection cap 61 on the steel end plate 342, and insert the plug tip 341 into the second socket steel plate 613. After the connection cap 61 is installed, fix it with bolts;

[0075] S6: hoist the single-column foundation 3 with the pile connection structure 6 installed to the designated location, clamp the vibrating hammer 7 on the clamping plate 63, and use the vibrating hammer 7 to drive the single-column foundation 3 to the designed elevation through the pile connection structure 6, and then remove the pile connection structure 6;

[0076] S7: The load-bearing circular tube 182 on the plate column lifting ear 18 is connected by a lifting rope to lift the grid platform 1 at sea. The grid platform 1 is installed and fixed on the column top connection structure 34 of the single column foundation 3 by plugging and matching the first socket steel plate 143 with the plug tip 341, thereby completing the installation of the overall single column steel platform structure.

[0077] The above embodiment is only a preferred technical solution of the present invention. Those skilled in the art should understand that the technical solutions or parameters in the embodiment can be modified or replaced without departing from the principle and essence of the present invention, and all should be covered by the protection scope of the present invention.

Claims

1. A single-column steel platform structure for offshore photovoltaics, characterized by: The invention comprises a truss-structured single-column foundation (3) and a grid platform (1) connected to the upper portion of the single-column foundation (3); the single-column foundation (3) is provided with foundation circular tubes (31) erected on its four sides; the lower section of the single-column foundation (3) extends below the mud surface, and a caisson (4) is provided around the mud surface; The grid platform (1) is provided with a grid structure in layers, and grid bolt ball nodes (15) and foundation bolt ball nodes (14) are respectively provided at the ends of the rods of the upper and lower grid structures. A plug tip (341) is vertically provided on the column top connection structure (34) at the top of the foundation circular tube (31), and a first socket steel plate (143) matched with the plug tip (341) is provided at the bottom of the foundation bolt ball node (14); a plate column type lifting lug (18) is provided on the top of the grid bolt ball node (15), and a load-bearing circular tube (182) for limiting the connection of the lifting rope is provided on the plate column type lifting lug (18), and the load-bearing circular tube (182) is protrudingly provided above the photovoltaic module (2) installed on the top of the grid platform (1), and a self-swinging unhooking space is reserved below the load-bearing circular tube (182).

2. The single-column steel platform structure for offshore photovoltaics according to claim 1, characterized in that: An upper chord rod (11) connected to a truss bolt ball node (15) is provided in the upper truss structure of the truss platform (1), a lower chord rod (12) connected to a foundation bolt ball node (14) is provided in the lower truss structure of the truss platform (1), and a web rod (13) is provided between the truss bolt ball node (15) and the foundation bolt ball node (14); The grid platform (1) is provided with a main purlin (16) on the top of the grid bolt ball node (15), and a secondary purlin (17) staggered with the main purlin (16) is provided on the top of the main purlin (16), and the photovoltaic module (2) is installed on the secondary purlin (17).

3. The single-column steel platform structure for offshore photovoltaics according to claim 1, characterized in that: The grid bolt ball node (15) is provided with a first mounting base above its first bolt ball (151), and the top end of the first mounting base forms a first flat portion; the foundation bolt ball node (14) is provided with a second mounting base below its second bolt ball (141), and the bottom end of the second mounting base forms a second flat portion.

4. The single-column steel platform structure for offshore photovoltaics according to claim 3, characterized in that: The plate-column lifting lug (18) is provided with a connecting pipe (184) erected on the first mounting support platform, a connecting portion (185) higher than the photovoltaic assembly (2) is provided above the connecting pipe (184), a main steel plate (181) connected to the load-bearing circular tube (182) is provided on the connecting portion, and an annular sealing plate (183) is provided on the side of the load-bearing circular tube (182) away from the main steel plate (181).

5. The single-column steel platform structure for offshore photovoltaics according to claim 4, characterized in that: The connecting portion (185) is provided with an inclined surface, and the inclined surface is inclined along the axial direction of the connecting pipe (184) toward the outer surface side of the main steel plate (181).

6. The single-column steel platform structure for offshore photovoltaics according to claim 3, characterized in that: A steel end plate (342) connected to the plug tip (341) is provided at the top of the column top connection structure (34); a base steel plate (144) connected to the steel end plate (342) is provided at the bottom of the second mounting base, the first socket steel plate (143) is provided on the base steel plate (144), and a first connecting steel plate (142) is provided between the base steel plate (144) and the base bolt ball node (14).

7. The single-column steel platform structure for offshore photovoltaics according to claim 1, characterized in that: The single-column foundation (3) is provided with a layered area in its vertical direction, wherein a horizontal bar (33) and an oblique bar (32) are provided in the layered area, and the ends of the horizontal bar (33) and the oblique bar (32) are both connected to the two side foundation circular tubes (31) on the same side of the single-column foundation (3).

8. The single-column steel platform structure for offshore photovoltaics according to claim 1, characterized in that: A soil-breaking column tip (5) is provided at the bottom of the single-column foundation (3), and the soil-breaking column tip (5) comprises a reverse baffle (52) in an inverted triangle shape. A soil-breaking circular tube (51) connected to the foundation circular tube (31) is provided on the lower side of the reverse baffle (52).

9. A piling tool for a single-column steel platform structure for offshore photovoltaics, characterized by: The invention comprises a pile connection structure (6) that can be matched with the single-column foundation (3) described in any one of claims 1 to 8, wherein the pile connection structure (6) is provided with a connection cap (61) on the column top connection structure (34), the bottom of the connection cap (61) is provided with a second socket steel plate (613) that is plugged into and matched with the plug tip (341), and the outside of the second socket steel plate (613) is provided with a load-bearing steel plate (611) that is connected to the steel end plate (342); The piling connection structure (6) is provided with a crossbeam (62) between adjacent connection caps (61), and a clamping plate (63) is provided at the top end of the connection cap (61) for clamping the vibrating hammer (7).

10. A method for installing a single-column steel platform structure for offshore photovoltaics, characterized in that: The single-column steel platform structure for offshore photovoltaics according to any one of claims 1 to 8 is installed, and offshore piling is performed using the piling tool according to claim 9, comprising the following steps: S1: Prefabricate the grid platform (1) and the single-column foundation (3) on shore, thereby installing the anti-caisson box (4) in the middle area of ​​the single-column foundation (3), installing the groundbreaking column tip (5) at the bottom of the single-column foundation (3), and installing the photovoltaic module (2) on the upper part of the grid platform (1); S2: transporting the installed grid platform (1) and single-column foundation (3) to a designated location in the photovoltaic field; S3: Installing a piling connection structure (6) on the top of the single-column foundation (3), so that the connection cap (61) is fixed on the steel end plate (342) and plugged into the plug tip (341); S4: hoisting the single-column foundation (3) with the pile connection structure (6) installed to a designated location, using a vibrating hammer (7) to drive the single-column foundation (3) to the designed elevation through the pile connection structure (6), and then removing the pile connection structure (6); S5: The load-bearing circular tube (182) on the plate-column lifting lug (18) is connected by a lifting rope to hoist the grid platform (1), and the grid platform (1) is installed and fixed on the column top connection structure (34) of the single-column foundation (3) by plugging and matching the first socket steel plate (143) with the plug tip (341), thereby completing the overall installation.

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