Offshore photovoltaic supporting structure with integral jacket foundation and mounting method

Abstract

The invention provides an offshore photovoltaic supporting structure with an integral jacket foundation, a steel net rack platform is arranged on the foundation structure, a photovoltaic module is mounted above the steel net rack platform, the foundation structure comprises vertically arranged pile foundations, the steel net rack platform is arranged at the tops of the pile foundations, and connecting parts are arranged between the pile foundations in an up-down layered manner. The upper-layer connecting part is arranged in a pile foundation top area, the lower-layer connecting part is arranged in a seabed mud surface area, and jackets are arranged in the upper-layer connecting part and the lower-layer connecting part; horizontal supports are connected between the adjacent pile foundations of the jacket, octagonal supports are arranged between the horizontal supports and the pile foundations, and the octagonal supports on the lower layer extend into the seabed mud surface. According to the foundation structure, the pile foundations form an integral structure to resist loads together by taking the pile foundations as main legs of the jacket on the connecting part of the upper layer and the lower layer, so that the stability of the upper structure of the foundation structure and the stability of the lower structure near a mud surface are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore photovoltaic power generation, and in particular to an offshore photovoltaic support structure with an integral conductor frame foundation and an installation method thereof. Background Art

[0002] As a renewable and clean energy, solar energy has attracted much attention. With the rapid development of photovoltaic technology, photovoltaic power generation has become one of the most effective ways to develop solar energy resources today.

[0003] However, traditional offshore photovoltaics install a single photovoltaic panel on a bracket and then connect it to form a photovoltaic array, and the foundation often uses multiple independent pile foundations, which leads to the disadvantages of large on-site construction workload, high difficulty, and high costs. In addition, when installing the superstructure, the accuracy of pile sinking is very high. If the traditional offshore wind power conductor frame foundation is used, although the accuracy can meet the requirements, the pile and the conductor frame have overlapping sections, which will increase the amount of steel used in the foundation and the workload of grouting, and the economic benefits are poor. Summary of the invention

[0004] The first object of the present invention is to provide a supporting structure with stable structure and good bearing performance. To this end, the present invention adopts the following technical solutions:

[0005] An offshore photovoltaic support structure with an integral jacket foundation is provided on the foundation structure, and a steel grid platform with photovoltaic modules installed on the top is arranged on the foundation structure, the foundation structure includes upright pile foundations, the steel grid platform is arranged on the top of the pile foundations, and the pile foundations are provided with upper and lower layered connection parts, the upper layer connection part is arranged in the top area of ​​the pile foundations, and the lower layer connection part is arranged in the seabed mud surface area, and jackets are arranged in the upper and lower layer connection parts; the jacket is connected with horizontal braces between adjacent pile foundations, an octagonal brace is arranged between the horizontal brace and the pile foundation, and the lower layer of the octagonal brace extends into the seabed mud surface, so that the upper and lower structures of the foundation structure are both in a stable load-bearing state.

[0006] Furthermore, adjacent horizontal supports are connected with horizontal diagonal supports, and the horizontal diagonal supports are in the same height plane as the horizontal supports.

[0007] Furthermore: a diagonal brace is provided between the bottom of the steel grid platform and the outer surface of the pile foundation.

[0008] Furthermore: the steel grid platform includes an upper platform and a lower platform, a parallel spacing space is provided between the upper platform and the lower platform, and an inclined rod is connected between the upper platform and the lower platform.

[0009] Furthermore: cross beams and longitudinal beams are arranged in the upper platform and the lower platform, and the cross beams and longitudinal beams are cross-connected with each other.

[0010] The second object of the present invention is to provide an installation method that is convenient to construct. To this end, the present invention adopts the following technical solutions:

[0011] The installation method of the offshore photovoltaic support structure with an integral jacket foundation comprises the following specific steps:

[0012] S1: The foundation structure is processed, manufactured and assembled in an onshore factory, and then transported to the site as a whole to perform pile construction on the foundation structure;

[0013] S2: After the steel grid platform is processed and manufactured, the photovoltaic modules are installed and the cables are connected on land, it is transported to the site as a whole;

[0014] S3: The steel grid platform is hoisted as a whole by a construction vessel, and the foundation structure and the steel grid platform are aligned and connected on site to form a whole.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention adopts a steel grid platform as the upper structure of the supporting structure, that is, the upper structure as a whole adopts a steel grid structure, the upper and lower sides of the steel grid have the same inclination angle, the platform height is small and can be laid flat during transportation, so that multiple platforms can be stacked and transported. At the same time, the present invention uses the jacket frame on the upper and lower connecting parts of the pile foundation, and the pile foundation is used as the main leg of the jacket frame to form an overall structure to jointly resist the load, so as to ensure the stability of the upper structure of the foundation structure and the stability of the lower structure near the mud surface, and the lateral contact area between the jacket frame and the soil can be increased by the octagonal support to improve the horizontal bearing capacity of the jacket frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front elevation view of the overall structure of the present invention;

[0018] Figure 2 It is a plan view of the overall structure of the present invention;

[0019] Figure 3 It is a plan view of the steel grid platform of the present invention.

[0020] The markings in the accompanying drawings are: foundation structure 1, pile foundation 11, conductor frame 12, horizontal support 121, horizontal diagonal support 122, octagonal support 123, diagonal support 13, steel grid platform 2, upper platform 21, cross beam 211, longitudinal beam 212, lower platform 22, diagonal rod 23, photovoltaic module 3. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0022] like Figure 1-3 As shown, an offshore photovoltaic support structure with an integral jacket foundation is provided on a foundation structure 1, and a steel grid platform 2 with a photovoltaic module 3 installed on the top is provided. The steel grid platform 2 is mainly used to bear the load of the photovoltaic module 3. The foundation structure 1 includes an upright pile foundation 11, and the steel grid platform 2 is provided on the top of the pile foundation 11, and is used to transfer the upper load to the foundation soil; upper and lower layered connection parts are provided between the integral pile foundations 11, the upper layer connection part is provided in the top area of ​​the pile foundation 11, and the lower layer connection part is provided in the seabed mud surface area, and jackets 12 are provided in the upper and lower layer connection parts, and the pile foundation 11 serves as the main leg of the jacket 12, forming an integral structure to jointly resist the load; there is no overlapping section between the two, so it is not necessary Grouting greatly saves the amount of foundation materials; the jacket 12 is connected to set horizontal supports 121 between adjacent pile foundations 11, and an octagonal support 123 is set between the horizontal support 121 and the pile foundation 11, and the lower octagonal support 123 extends into the seabed mud surface, so that the upper and lower structures of the foundation structure 1 are both in a stable bearing state; thereby, the upper jacket 12 can ensure the stability of the upper part of the foundation structure 1, and also ensure the stability of the connection position between the upper pile foundation 11 and the steel grid platform 2; at the same time, the lower jacket 12 can ensure the stability of the lower part of the foundation structure 1, and can increase the lateral contact area between the jacket 12 and the soil, and use the pile foundation 11 to jointly bear the lateral resistance of the soil, thereby improving the horizontal bearing capacity of the jacket 12.

[0023] In this embodiment, the pile foundation 11 uses steel pipe piles of a certain thickness, totaling four, forming a rectangular shape; the inclination angle of the steel grid platform 2 is controlled by the different lengths of the front and rear pile foundations 11, thereby maximizing the use of light resources and increasing the power generation of the photovoltaic module 3.

[0024] Among them, four horizontal supports 121 are also provided according to the number of pile foundations 11, and the four horizontal supports 121 form a rectangular shape to connect all the pile foundations 11. At the same time, the octagonal support 123 is an "eight"-shaped support structure, and an octagonal support 123 is provided under each horizontal support 121, so that the two bifurcated ends of the octagonal support 123 are respectively connected to two adjacent pile foundations 11.

[0025] like Figure 2 As shown, specifically, adjacent horizontal braces 121 are connected with horizontal diagonal braces 122, and the horizontal diagonal braces 122 are in the same height plane as the horizontal braces 121. The horizontal diagonal braces 122 arranged in this embodiment are in a diamond shape, connecting the horizontal braces 121 at the same height and different directions, and are used to improve the overall torsion resistance of the foundation structure 1.

[0026] like Figure 1As shown, specifically, an inclined brace 13 is provided between the bottom of the steel grid platform 2 and the outer surface of the pile foundation 11. In this embodiment, the inclined brace 13 is a circular steel pipe, one end of which is welded to the pile foundation 11 to form a reliable connection, and the other end is welded to the steel grid platform 2, thereby effectively improving the overall stability of the steel grid platform 2. At the same time, the inclined brace 13 can also be connected by bolts and ear plates to reduce the welding workload on site.

[0027] like Figure 1-3 As shown, specifically, the steel grid platform 2 includes an upper platform 21 and a lower platform 22, with a parallel spacing space between the upper platform 21 and the lower platform 22, and an inclined rod 23 is connected between the upper platform 21 and the lower platform 22. In this embodiment, the inclined rod 23 is a thin-walled circular steel pipe, connecting the upper platform 21 and the lower platform 22 into a whole, so as to avoid excessive local deformation.

[0028] The steel grid platform 2 is preferably arranged facing south and distributed above the foundation structure 1 so that it is fixed above the sea surface. At the same time, the photovoltaic module 3 can be fixed on the upper platform 21 of the steel grid platform 2 by bolt connection.

[0029] Among them, the upper platform 21 and the lower platform 22 are both provided with a cross beam 211 and a longitudinal beam 212, and the cross beam 211 and the longitudinal beam 212 are cross-connected with each other. In this embodiment, the cross beam 211 is made of C-shaped steel, and the longitudinal beam 212 is also made of C-shaped steel. The longitudinal beam 212 is vertically welded to the cross beam 211 and arranged below the cross beam 211 as the main load-bearing component of the photovoltaic module 3.

[0030] In this embodiment, since the upper platform 21 and the lower platform 22 of the steel grid platform 2 have the same inclination angle, the platform height is small and can be laid flat, and the pile foundations 11 are not of the same height. During installation, the inclination angle formed by the pile foundations 11 is used to form the inclination angle of the entire platform. The following advantages are mainly reflected: First, the upper steel grid platform 2 is small in height and can be laid flat during transportation, so multiple steel grid platforms 2 can be stacked and transported, saving transportation space and reducing transportation costs; second, the steel grid structure of the steel grid platform 2 is easy to install, does not require special offshore base processing and manufacturing, and can be processed by general steel structure factories, with low production and installation costs and fast speed; third, the steel grid platform 2 is conducive to standardized operations, multiple platform structures are exactly the same, and the processing and installation of rods are also the same. The production and installation costs are reduced by using assembly line operations.

[0031] See also Figure 1-3 , when the supporting structure is installed offshore, the specific steps are as follows:

[0032] S1: The foundation structure 1 is pre-pile-dumped. The foundation structure 1 is processed and manufactured in an onshore factory, and the pile foundation 11 and the jacket 12 are welded and assembled in advance, and then transported to the site as a whole. The pile foundation 11 is sunk by the vibration of a hydraulic vibration hammer;

[0033] S2: The steel grid platform 2 is processed and manufactured on land, and the photovoltaic modules 3 are installed and the cables are connected, and then transported to the site as a whole;

[0034] S3: The steel grid platform 2 is hoisted as a whole by a construction vessel, and the foundation structure 1 and the steel grid platform 2 are aligned and welded together on site to complete the installation of the offshore photovoltaic support structure system with an integral conductor frame foundation.

[0035] 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 embodiments can be modified or replaced without departing from the principle and essence of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. An offshore photovoltaic support structure with an integral jacket foundation, characterized in that: A steel grid platform (2) with a photovoltaic module (3) installed on top is arranged on the foundation structure (1), the foundation structure (1) comprises a pile foundation (11) arranged upright, the steel grid platform (2) is arranged on the top of the pile foundation (11), and the pile foundation (11) is provided with upper and lower layered connection parts, the upper layer connection part is arranged in the top area of ​​the pile foundation (11), and the lower layer connection part is arranged in the seabed mud surface area, and the upper and lower layer connection parts are both provided with a conductor pipe frame (12); The conductor frame (12) is connected to a horizontal support (121) between adjacent pile foundations (11), an octagonal support (123) is arranged between the horizontal support (121) and the pile foundation (11), and the lower octagonal support (123) extends into the seabed mud surface, so that the upper and lower structures of the foundation structure (1) are both in a stable load-bearing state.

2. The offshore photovoltaic support structure with an integral jacket foundation according to claim 1, characterized in that: Horizontal diagonal braces (122) are connected between adjacent horizontal braces (121), and the horizontal diagonal braces (122) and the horizontal braces (121) are in the same height plane.

3. The offshore photovoltaic support structure with an integral jacket foundation according to claim 1, characterized in that: A diagonal brace (13) is provided between the bottom of the steel grid platform (2) and the outer surface of the pile foundation (11).

4. The offshore photovoltaic support structure with an integral jacket foundation according to claim 1, characterized in that: The steel grid platform (2) comprises an upper platform (21) and a lower platform (22), a parallel spacing space is provided between the upper platform (21) and the lower platform (22), and an inclined rod (23) is connected between the upper platform (21) and the lower platform (22).

5. The offshore photovoltaic support structure with an integral jacket foundation according to claim 4, characterized in that: The upper platform (21) and the lower platform (22) are both provided with a cross beam (211) and a longitudinal beam (212), and the cross beam (211) and the longitudinal beam (212) are cross-connected with each other.

6. A method for installing an offshore photovoltaic support structure with an integral jacket foundation, characterized in that: The offshore photovoltaic support structure with an integral jacket foundation as claimed in any one of claims 1 to 5 is constructed, and the specific steps are as follows: S1: The foundation structure (1) is processed, manufactured and assembled in an onshore factory, and then transported to the site as a whole to perform pile construction on the foundation structure (1); S2: After the steel grid platform (2) is processed and manufactured on land, the photovoltaic modules (3) are installed and the cables are connected, the steel grid platform (2) is transported to the site as a whole; S3: The steel grid platform (2) is hoisted as a whole by a construction vessel, and the foundation structure (1) and the steel grid platform (2) are aligned and connected on site to form a whole.

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