Monolithic offshore photovoltaic support platform structure system and installation method

Abstract

The application provides a whole offshore photovoltaic support platform structure system, which comprises a foundation structure and an upper structure connected with a photovoltaic module arranged on the foundation structure; the foundation structure comprises a plurality of pile foundations and a guide pipe rack connected and arranged between the pile foundations; the upper structure comprises a support platform, a stand column connected and arranged at the bottom of the support platform, and an upper connecting structure arranged at the bottom of the stand column; a foundation connecting structure is arranged at the top of the pile foundation, and a guide pressure bearing part capable of being connected and matched with the upper connecting structure is arranged in the foundation connecting structure. The whole support platform structure system is divided into an independent upper structure and a foundation structure, the two parts are respectively processed and assembled on land, then transported to the sea for installation, and the whole support platform structure system is only installed twice on site, so that the engineering quantity can be saved, the construction is facilitated, and the construction progress is accelerated.

Description

Technical Field

[0001] This invention relates to the field of offshore photovoltaic power generation technology, specifically to an integrated offshore photovoltaic support platform structure system and installation method. Background Technology

[0002] Currently, the shortage of traditional energy sources and the deterioration of the natural environment are becoming increasingly serious problems. Vigorously developing new energy industries, primarily photovoltaics, can replace fossil fuels. Among them, offshore photovoltaics is an emerging direction for the utilization of solar energy, and it has developed rapidly in recent years.

[0003] However, traditional offshore solar power involves installing individual solar panels onto support structures and then connecting them to form a solar array. Furthermore, the foundations often use multiple independent pile foundations, leading to drawbacks such as a large workload, high difficulty, and high cost during on-site construction. In addition, the installation of the superstructure requires very high precision in pile driving. While traditional offshore wind turbine jacket foundations can meet the precision requirements, the overlapping sections between the piles and the jacket increase the amount of steel used in the foundation and the amount of grouting work, resulting in poor economic efficiency. Summary of the Invention

[0004] The primary objective of this invention is to provide a support platform structure system in which the two independent components can be independently assembled, and which allows for rapid connection and installation of the two components. To this end, the invention employs the following technical solution:

[0005] An integrated offshore photovoltaic support platform structure system includes a foundation structure and an upper structure connected to photovoltaic modules on the foundation structure. The foundation structure includes multiple piles and a jacket connecting the piles. The upper structure includes a support platform and columns connected to the bottom of the support platform, with an upper connecting structure at the base of the columns. A foundation connecting structure is provided at the top of the piles, and the foundation connecting structure contains guide and pressure-bearing components that can connect and cooperate with the upper connecting structure, so that the columns and piles can be quickly connected. Simultaneously, the foundation structure and the upper structure can be either separate integral structures or integrated as a single unit.

[0006] Furthermore, the guide frame includes an above-mud portion and a below-mud portion. The above-mud portion is provided with horizontal inter-pile bracing that connects the pile foundations, and diagonal inter-pile bracing that crosses between adjacent pile foundations.

[0007] Furthermore, the subsurface portion is provided with an octagonal brace that connects the pile foundation.

[0008] Furthermore, the support platform includes interconnected horizontal beams and vertical beams, and the support platform is inclined at an angle to the horizontal plane.

[0009] Further, the upper structure comprises an inter-column horizontal support connected with the columns, and an inter-column inclined support is arranged between the support platform and the columns.

[0010] Further, a guide hole is arranged in the guide pressure bearing part, and a transition section is arranged between the guide pressure bearing part and the pile top of the pile foundation, so as to form a connecting space; meanwhile, the upper connecting structure comprises a flange arranged at the bottom of the column, a guide tip is arranged on the flange and connected with the guide hole, and a fixing member is arranged on the flange and the guide pressure bearing part to connect them.

[0011] Further, a connecting section for sinking the pile of the pile foundation is arranged on the foundation connecting structure, the connecting section comprises a reinforcing plate connected with the pile top of the pile foundation, and the cross-sectional area of the reinforcing plate is larger than that of the pile top section of the pile foundation; a pile clamping section is arranged around the outside of the guide pressure bearing part at the top end of the reinforcing plate, and the pile clamping section is connected with the hydraulic vibrating hammer.

[0012] Further, a connecting inclined support is arranged between the bottom of the reinforcing plate and the outer surface of the pile foundation.

[0013] Further, a beam-column connecting structure is arranged at the top of the column of the upper structure, the beam-column connecting structure comprises a beam-to-beam connecting member connected with the cross beam and the longitudinal beam, and an ear is arranged on the top of the beam-to-beam connecting member.

[0014] The second object of the present application is to provide an installation method for reducing offshore construction procedures and reducing construction difficulty and cost.

[0015] The installation method of the integral offshore photovoltaic support platform structure system comprises the following specific steps:

[0016] S1: performing pile sinking construction on the foundation structure, the foundation structure is processed, manufactured and assembled on land, and then is transported to the site as a whole, the hydraulic vibrating hammer is fixed on the pile foundation through the pile clamping section, and the pile sinking is realized by vibration of the hydraulic vibrating hammer;

[0017] S2: the upper structure is transported to the site as a whole after the component processing, the photovoltaic assembly installation and the cable connection are completed on land;

[0018] S3: the upper structure is hoisted by the construction ship as a whole, the centering connection of the foundation structure and the upper structure is realized through the foundation connecting structure and the upper connecting structure, so that the foundation structure and the upper structure are installed into a complete integral structure.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The present application separates the whole supporting platform structure system into an upper structure and a foundation structure, and transports and installs the two parts after being processed and assembled on land, so that the whole supporting platform structure system only needs to be installed twice on site, thereby saving the engineering quantity, facilitating the construction, and accelerating the construction progress. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a front elevation view of the integral offshore photovoltaic supporting platform structure system of the present application;

[0022] Figure 2 is a plan view of the integral offshore photovoltaic supporting platform structure system of the present application;

[0023] Figure 3 is a side elevation view of the integral offshore photovoltaic supporting platform structure system of the present application;

[0024] Figure 4 is a plan view of the supporting platform structure of the present application;

[0025] Figure 5 is a front elevation view of the pile hammer and pile top quick connecting device of the present application;

[0026] Figure 6 is a front elevation view of the upper structure and foundation structure quick connecting device of the present application;

[0027] Figure 7 is a plan view of the upper structure and foundation structure quick connecting device of the present application;

[0028] Figure 8 is a front elevation view of the beam column connecting structure of the present application;

[0029] Figure 9 is a plan view of the beam column connecting structure of the present application;

[0030] Figure 10 is a side elevation view of the beam column connecting structure of the present application.

[0031] The labels in the attached diagram are as follows: Foundation structure 1, Pile foundation 11, Guide frame 12, Horizontal brace between piles 121, Diagonal brace between piles 122, Octagonal brace 123, Foundation connection structure 13, Transition section 131, Reinforcing plate 133, Pile clamping section 134, Connecting diagonal brace 135, Guide bearing component 132, Superstructure 2, Horizontal beam 211, Longitudinal beam 212, Support platform 21, Column 22, Horizontal brace between columns 23, Diagonal brace between columns 24, Superstructure connection structure 25, Flange 251, Guide tip 252, Beam-column connection structure 26, Lower circular plate 261, Upper circular plate 262, Cross stiffener 263, Lifting lug 264, Photovoltaic module 3, Hydraulic vibratory hammer 4. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0033] like Figures 1-10 As shown, the integrated offshore photovoltaic support platform structure system includes a foundation structure 1 and an upper structure 2 connected to photovoltaic modules 3 on the foundation structure 1. The foundation structure 1 includes multiple pile foundations 11 and a jacket frame 12 connected between the pile foundations 11. The upper structure 2 includes a support platform 21 and columns 22 connected to the bottom of the support platform 21, with an upper connecting structure 25 at the bottom of the columns 22. A foundation connecting structure 13 is set at the top of the pile foundations 11, and a guide pressure-bearing component 132 that can connect and cooperate with the upper connecting structure 25 is set in the foundation connecting structure 13 to enable a quick connection between the columns 22 and the pile foundations 11. At the same time, the foundation structure 1 and the upper structure 2 are either separate integrated structures or integrated as a whole.

[0034] In this embodiment, the platform structure system consists of only two parts: the superstructure 2 and the foundation structure 1. Firstly, the superstructure 2 adopts an integral structure, allowing for the fabrication, installation of photovoltaic modules 3, and internal cable connections to be completed on land. The superstructure 2 is transported to the site as a whole and then installed onto the foundation structure 1. This requires only one installation, reducing on-site work and accelerating offshore construction. Secondly, the foundation structure 1 also adopts an integral structure, with the jacket 12 and piles 11 forming a single unit. The piles 11 also serve as the main legs of the jacket 12. The foundation structure 1 is fabricated and assembled on land, then transported to the site as a whole. Four hydraulic vibratory hammers 4 are fixed to the tops of the four piles 11. The vibration of the hydraulic vibratory hammers 4 sinks the jacket 12 and piles 11 together into the seabed. The foundation structure 1 also requires only one installation, further reducing on-site work and accelerating offshore construction.

[0035] Secondly, since the jacket 12 and the pile foundation 11 are integrated as a whole, the pile foundation 11 also serves as the main leg of the jacket 12, forming an integrated structure to resist loads together, thus the sleeve of the traditional jacket foundation is not needed, the pile foundation 11 and the jacket 12 have no overlapping section, and grouting is not needed between the pile foundation 11 and the jacket 12, which greatly saves the amount of foundation materials.

[0036] In the embodiment, the pile foundation 11 is a steel pipe pile with a certain thickness, and preferably four are provided in total, so that the pile foundation 11 forms a rectangular shape between the pile foundations 11, so as to transmit the upper load to the ground soil.

[0037] The upper structure 2 is arranged southward and is distributed above the foundation structure 1, so that the upper structure 2 is positioned above the sea surface; meanwhile, the photovoltaic module 3 is fixed on the support platform 21 of the upper structure 2 by means of bolt fixation.

[0038] As shown in Figures 1-3 The jacket 12 includes the inter-pile horizontal brace 121 connecting the pile foundations 11 and the inter-pile diagonal brace 122 connecting between the adjacent pile foundations 11.

[0039] In the embodiment, the inter-pile horizontal brace 121 is preferably provided in two rows, wherein the upper inter-pile horizontal brace 121 is above the water surface, and the lower inter-pile horizontal brace 121 is above the mud surface and below the water surface; the inter-pile horizontal brace 121 is arranged in a diamond shape between the pile foundations 11, and is used for resisting torsion of the foundation. Meanwhile, the inter-pile diagonal brace 122 is arranged between the two rows of inter-pile horizontal braces 121, and part of the inter-pile diagonal brace 122 is arranged above the water surface, and part of the inter-pile diagonal brace 122 is arranged below the water surface, and the inter-pile diagonal braces 122 are arranged in an “X” shape, and are used for ensuring the horizontal force resistance of the foundation. Therefore, compared with the traditional independent pile foundation, the overall rigidity of the foundation is greatly increased after the inter-pile diagonal brace 122 and the inter-pile diagonal brace 122 are arranged in the mud surface part.

[0040] As shown in Figures 1-3 The jacket 12 further includes the octagonal brace 123 connecting the inter-pile horizontal brace 121 and the pile foundation 11 in the mud surface part.

[0041] The octagonal bracing 123 in the embodiment is arranged on four sides formed by the pile foundation 11 of the foundation structure 1, is fixed at the upper end on the horizontal bracing 121 between piles below, is fixed at the lower end on the pile foundation 11, and is mainly distributed below the mud surface; meanwhile, two octagonal bracings 123 are arranged on each side formed by the pile foundation 11, are arranged in the shape of an "eight" character, and jointly increase the overall rigidity of the foundation structure 1 with the horizontal bracing 121 between piles and the inclined bracing 122 between piles, so as to form horizontal constraint on the pile foundation 11 and avoid instability caused by excessive deformation. When the pile foundation 11 bears horizontal load, the bending moment at the position of 3-5 times the diameter below the mud surface is the largest, and the octagonal bracing 123 arranged at the position greatly improves the internal force of the pile body and greatly increases the horizontal rigidity. Meanwhile, due to the shape design of the octagonal bracing 123, the resistance of the octagonal bracing 123 to soil is small when the pile is sunk, and the pile sinking is more convenient.

[0042] As shown in Figures 5-7 , specifically, a guide hole is formed in the guide pressure-bearing component 132, and a transition section 131 is arranged between the guide pressure-bearing component 132 and the pile top of the pile foundation 11 to form a connecting space; meanwhile, the upper connecting structure 25 includes a flange 251 arranged at the column bottom of the column 22, the flange 251 is provided with a guide insertion tip 252 connected and matched with the guide hole, and a fixing member connecting the flange 251 and the guide pressure-bearing component 132 is arranged on the flange 251 and the guide pressure-bearing component 132.

[0043] The transition section 131 is preferably in the shape of a cone with the upper end smaller and the lower end larger at the pile top of the pile foundation 11, and the transition section 131 can adopt a plate member and the connecting space is arranged inside the transition section 131. Since the connecting space can be hollow, the guide insertion tip 252 with the functions of guiding and centering can be quickly inserted into the guide hole. The guide pressure-bearing component 132 can adopt a flange, so that the flange 251 and the guide pressure-bearing component 132 are more convenient to connect through bolt connection when connected.

[0044] As shown in Figures 5-7 , specifically, the foundation connecting structure 13 is provided with a connecting part for sinking the pile foundation 11, the connecting part includes a reinforcing plate 133 connected with the pile top of the pile foundation 11, and the cross-sectional area of the reinforcing plate 133 is larger than that of the pile top part of the pile foundation 11; a pile clamping section 134 is arranged around the outside of the guide pressure-bearing component 132 at the top end of the reinforcing plate 133, and the pile clamping section 134 can be connected and matched with the hydraulic vibrating hammer 4.

[0045] In the embodiment, the reinforcing plate 133 is a round plate, and the diameter of the reinforcing plate 133 is larger than the diameter of the pile foundation 11. The pile clamping section 134 can adopt a plate member structure and is welded with the reinforcing plate 133 for clamping of the hydraulic vibrating hammer 4 when sinking the pile. The horizontal reinforcing plate 133 or the horizontal flange not only has a reliable structure, but also can make the stress uniform.

[0046] It should be noted that since the upper structure 2 and the foundation structure 1 are integrally machined and manufactured, the machining precision is high, and the on-site construction precision is not dependent. The upper and lower structures are connected by bolts, the on-site operation amount is small, and the connection efficiency is more rapid. At the same time, cooperating with the guiding and centering guide insertion tip 252, the quick centering and insertion of the upper structure 2 and the foundation structure 1 during connection can be realized. Moreover, the clamping pile structure of the foundation connecting structure 13 and the upper connecting structure 25 and the hydraulic vibration hammer 4 is not affected, and the quick clamping pile and quick pile sinking construction are realized.

[0047] The connecting inclined brace 135 is arranged between the bottom of the reinforcing plate 133 and the outer surface of the pile foundation 11 to avoid excessive local deformation during pile sinking.

[0048] As shown in Figures 1-4 , specifically, the support platform 21 includes a transverse beam 211 and a longitudinal beam 212 connected to each other, and the support platform 21 is arranged at an inclination angle with the horizontal plane.

[0049] In this embodiment, the transverse beam 211 is made of a C-shaped steel, and the longitudinal beam 212 is made of a rectangular steel pipe, which is arranged perpendicularly to the transverse beam 211 by welding. The transverse beam 211 and the longitudinal beam 212 serve as the main load-bearing members of the photovoltaic module 3 for bearing the load of the photovoltaic module 3. At the same time, the support platform 21 is arranged at a certain angle with the horizontal plane and faces south, thereby maximizing the use of light resources and improving the power generation capacity of the photovoltaic module 3.

[0050] The upper structure 2 includes a column-to-column horizontal brace 23 connected to the column 22, and a column-to-column inclined brace 24 arranged between the support platform 21 and the column 22.

[0051] In this embodiment, the column 22 is preferably made of a circular steel pipe. The column-to-column horizontal brace 23 is made of a circular steel pipe and is arranged in each of the four peripheral planes surrounded by the column 22 to connect adjacent columns 22. The column-to-column inclined brace 24 is also made of a circular steel pipe and is arranged in the four planes to improve the overall rigidity of the upper structure 2 together with the column-to-column horizontal brace 23, thereby avoiding instability and damage.

[0052] As shown in Figures 8-10 , specifically, the column top of the column 22 of the upper structure 2 is provided with a beam-column connecting structure 26, which includes a beam-to-beam connecting piece welded and connected to the transverse beam 211 and the longitudinal beam 212, and a lifting lug 264 is arranged on the top of the beam-to-beam connecting piece.

[0053] In the embodiment, the inter-beam connecting member comprises a lower circular plate 261, an upper circular plate 262, and a cross stiffened plate 263 arranged between the lower circular plate 261 and the upper circular plate 262; the lower circular plate 261 is welded to the top of the column 22, and has a diameter slightly larger than the column 22; the upper circular plate 262 is arranged correspondingly to the lower circular plate 261, and has the same diameter as the lower circular plate 261; the cross stiffened plate 263 is arranged between the lower circular plate 261 and the upper circular plate 262 to increase the overall rigidity of the beam-column connecting structure 26, so as to avoid excessive deformation and local instability during hoisting.

[0054] The lug 264 is a plate-type lug, which is a rigid structure and has no obstacles around the lug 264, and is welded to the upper circular plate 262, and is used for connecting the automatic unhooking device of the crane, so as to facilitate quick hoisting.

[0055] In the embodiment, the photovoltaic module 3 is a common photovoltaic panel, which needs to be subjected to marine corrosion prevention treatment by the manufacturer before leaving the factory.

[0056] Please refer to Figures 1-10 Before the overall offshore photovoltaic support platform structure system is constructed offshore, the outer surfaces of all steel structural members of the foundation structure 1 and the upper structure 2 need to be sprayed with marine heavy-duty corrosion-resistant paint, and the photovoltaic module 3 also needs to be subjected to salt mist resistance treatment before leaving the factory, so as to further ensure good corrosion prevention effect. The welding or bolt connection between the components of the structure system should be completed on land as much as possible, so as to reduce the offshore construction procedure, and reduce the construction difficulty and cost. When the structure system is constructed offshore, the specific steps are as follows:

[0057] S1: The foundation structure 1 and the upper structure 2 are manufactured and assembled on land in advance, wherein the upper structure 2 is installed and connected with the photovoltaic module 3 and the cable after being manufactured on land;

[0058] S2: The foundation structure 1 is transported to the site of the target construction sea area by a transport ship as a whole, the hydraulic vibration hammer 4 is connected with the pile clamping segment 134, so as to be fixed on the pile foundation 11, and the pile foundation 11 is driven into the ground by the vibration of the hydraulic vibration hammer 4;

[0059] S3: The upper structure 2 is hoisted by a construction ship as a whole, the guide insertion tip 252 with the functions of guiding and centering is inserted into the guide hole of the guide pressure bearing part 132 under the action of hoisting, and the flange 251 is connected with the guide pressure bearing part 132 by bolts, so that the foundation structure 1 and the upper structure 2 are installed as a whole to form a complete support platform structure system.

[0060] The above embodiment is only one preferred technical solution of the present application, and 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 principles and essence of the present application, and all should be covered within the protection scope of the present application.

Claims

1. An integrated offshore photovoltaic support platform structure system, comprising a base structure (1) and an upper structure (2) connected to photovoltaic modules (3) on the base structure (1); characterized in that: The basic structure (1) includes multiple pile foundations (11) and a guide frame (12) connected between the pile foundations (11); the superstructure (2) includes a support platform (21) and a column (22) connected to the bottom of the support platform (21), and an upper connection structure (25) is provided at the bottom of the column (22). A foundation connection structure (13) is provided at the top of the pile foundation (11), and a guide pressure bearing component (132) that can be connected and cooperated with the upper connection structure (25) is provided in the foundation connection structure (13) so that the column (22) and the pile foundation (11) are in a quick connection state. Meanwhile, the basic structure (1) and the upper structure (2) are either separate overall structures or connected as a whole; The basic connection structure (13) is provided with a connection part for driving the pile foundation (11). The connection part includes a reinforcing plate (133) connected to the top of the pile foundation (11), and the cross-sectional area of ​​the reinforcing plate (133) is larger than the cross-sectional area of ​​the top of the pile foundation (11). The top of the reinforcing plate (133) is provided with a pile clamping section (134) around the outside of the guide bearing component (132). The pile clamping section (134) can be connected and cooperated with the hydraulic vibratory hammer (4). A connecting brace (135) is provided between the bottom of the reinforcing plate (133) and the outer surface of the pile foundation (11). The guide pressure bearing component (132) has a through guide hole, and a transition section (131) is provided between the guide pressure bearing component (132) and the top of the pile foundation (11) to form a connection space; at the same time, the upper connection structure (25) includes a flange (251) provided at the bottom of the column (22), the flange (251) is provided with a guide tip (252) that connects and cooperates with the guide hole, and a fastener is provided on the flange (251) and the guide pressure bearing component (132) to connect the two; During pile driving, the hydraulic vibratory hammer (4) is fixed on the pile foundation (11) through the pile clamping section (134), and the pile driving is achieved by the vibration of the hydraulic vibratory hammer (4); The superstructure (2) is hoisted as a whole by a construction vessel. The foundation connection structure (13) and the superstructure (25) are used to achieve the centering connection between the foundation structure (1) and the superstructure (2), so that the foundation structure (1) and the superstructure (2) are installed together to form a complete support platform structure system.

2. The integrated offshore photovoltaic support platform structure system according to claim 1, characterized in that: The guide frame (12) includes an above-mud portion and a below-mud portion. The above-mud portion is provided with horizontal inter-pile bracing (121) that connects the pile foundations (11), and diagonal inter-pile bracing (122) that cross-connects adjacent pile foundations (11).

3. The integrated offshore photovoltaic support platform structure system according to claim 2, characterized in that: The subsurface portion is provided with an octagonal brace (123) that connects the pile foundation (11).

4. The integrated offshore photovoltaic support platform structure system according to claim 1, characterized in that: The support platform (21) includes interconnected crossbeams (211) and longitudinal beams (212), and the support platform (21) is inclined to the horizontal plane.

5. The integrated offshore photovoltaic support platform structure system according to claim 1, characterized in that: The upper structure (2) includes a horizontal brace (23) between columns connected to the column (22), and an inclined brace (24) between the support platform (21) and the column (22).

6. The integrated offshore photovoltaic support platform structure system according to claim 4, characterized in that: The column (22) of the upper structure (2) is provided with a beam-column connection structure (26) at the top of the column. The beam-column connection structure (26) includes a beam connector that connects and cooperates with the crossbeam (211) and the longitudinal beam (212), and a lifting lug (264) is connected and provided at the top of the beam connector.

7. An installation method for an integrated offshore photovoltaic support platform structure system, characterized in that: The specific steps for the integrated offshore photovoltaic support platform structure system as described in any one of claims 1-6 are as follows: S1: The foundation structure (1) is subjected to pile driving construction. The foundation structure (1) is manufactured and assembled in an onshore factory and then transported to the site as a whole. The hydraulic vibratory hammer (4) is fixed on the pile foundation (11) through the pile clamping section (134). The pile is driven by the vibration of the hydraulic vibratory hammer (4). S2: After the upper structure (2) is fabricated on land, the photovoltaic modules (3) are installed and the cables are connected, it is transported to the site as a whole; S3: The superstructure (2) is hoisted as a whole by a construction vessel. The foundation connection structure (13) and the superstructure (2) are connected in the center by the foundation connection structure (13) and the superstructure connection structure (25) so that the foundation structure (1) and the superstructure (2) are installed together to form the complete support platform structure system.

Images