A typhoon-resistant foundation structure for a photovoltaic rack

Abstract

A typhoon-resistant foundation structure for photovoltaic (PV) supports includes a PV support and a foundation. The PV support is fixed on the foundation, which is buried in the soil. The foundation includes a base and an anti-overturning component. The base has a windward side and a leeward side, and the anti-overturning component is located on the windward and leeward sides of the base. This invention uses a foundation structure to replace the traditional pipe pile structure, fundamentally avoiding the problems of pipe pile tilting and collapse. In this invention, anti-overturning components are provided on the windward and leeward sides of the base. The base provides the main vertical bearing capacity, while the anti-overturning component enhances the horizontal wind resistance. The combination of the two forms a stable force system, thereby significantly improving the overturning resistance of the foundation and effectively resisting the strong wind loads brought by typhoons, allowing the foundation to remain stable under extreme conditions such as typhoons and heavy rain.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and more particularly to a typhoon-resistant foundation structure for photovoltaic supports. Background Technology

[0002] In recent years, photovoltaic power generation has been widely used as a clean energy source, and the stability of photovoltaic supports directly affects the safety and reliability of the power generation system. Currently, the main method for fixing photovoltaic supports is through pipe pile foundations, which involves driving steel pipe piles or concrete pipe piles into the soil for fixation.

[0003] However, in typhoon-prone areas, this type of pipe pile structure has insufficient wind resistance. Typhoons are often accompanied by strong southeasterly winds, generating significant wind loads. Traditional pipe piles mainly rely on vertical bearing capacity and have weak overturning resistance, making them prone to tilting and collapse. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, the present invention provides a typhoon-resistant foundation structure for photovoltaic support. This structure uses a foundation instead of pipe piles, which fundamentally avoids the problems of pipe pile tilting and collapse, and can significantly improve the horizontal overturning resistance of the foundation, effectively resisting the strong wind load brought by typhoons.

[0005] To achieve the above objectives, the present invention provides a typhoon-resistant foundation structure for photovoltaic supports, comprising a photovoltaic support and a foundation. The photovoltaic support is fixed on the foundation, which is buried in the soil. The foundation includes a base and an anti-overturning part. The base has a windward side and a leeward side, and the anti-overturning part is respectively provided on the windward side and the leeward side of the base.

[0006] As a further improvement of the present invention, the base is a rhomboid structure, and one set of opposite corners of the base is set as the windward side and the leeward side.

[0007] As a further improvement of the present invention, the anti-overturning part is a rectangular structure integrally formed with the base.

[0008] As a further improvement of the present invention, the tops of both the base and the anti-overturning part are exposed outside the soil, and the tops of both the base and the anti-overturning part are provided with a windward slope and a leeward slope.

[0009] As a further improvement of the present invention, a hoisting lug is provided on the top of the base or the anti-overturning part.

[0010] As a further improvement of the present invention, the base has a hollow structure inside, which is filled with soil and rock or grout.

[0011] As a further improvement of the present invention, the bottom of the base is provided with anti-slip ribs or barbs.

[0012] As a further improvement of the present invention, the base and the anti-overturning part respectively use a structure that is narrow at the top and wide at the bottom, and the sides form a slope, so that the soil can be pressed on the slope of the base 21 and the anti-overturning part 22.

[0013] As a further improvement of the present invention, the bottom of the photovoltaic bracket is provided with a bracket base and a connecting bolt, and the bracket base is fixed to the base by the connecting bolt.

[0014] As a further improvement of the present invention, it also includes a measuring bolt, a gasket-type pressure sensor, and a monitoring and display device. The measuring bolt passes through the gasket-type pressure sensor and the bracket base in sequence and is then fixed on the base. The gasket-type pressure sensor is electrically connected to the monitoring and display device.

[0015] The beneficial effects of this invention are as follows: This invention uses a foundation structure to replace the traditional pipe pile structure, fundamentally avoiding the problems of pipe pile tilting and collapse. In this invention, anti-overturning parts are set on the windward and leeward sides of the base. The base provides the main vertical bearing capacity, while the anti-overturning parts enhance the horizontal wind resistance. The combination of the two forms a stable force system, thereby significantly improving the overturning resistance of the foundation, effectively resisting the strong wind loads brought by typhoons, and enabling the foundation to remain stable under extreme conditions such as typhoons and rainstorms. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of Example 1;

[0017] Figure 2 This is a schematic diagram of the structure of Example 2;

[0018] Figure 3 This is a schematic diagram of the structure of Example 3;

[0019] Figure 4 This is a schematic diagram of the structure of Example 4;

[0020] Marking description: 1. Photovoltaic bracket, 11. Bracket base, 12. Connecting bolt, 2. Foundation, 21. Base, 22. Anti-overturning part, 23. Windward side, 24. Leeward side, 25. Lifting lug, 26. Hook structure, 27. Windward slope, 28. Leeward slope, 29. Slope, 3. Measuring bolt, 31. Gasket-type pressure sensor. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0022] Example 1:

[0023] The Liyutan Photovoltaic Project in Xuwen County, Guangdong Province, is located in a coastal area. Traditional photovoltaic support structures with pipe piles are insufficient for typhoon resistance, especially after the collapse and damage caused by Typhoon Mangkhut (a Category 1 typhoon) on September 7, 2024. The typhoon season, from June to November each year, is characterized by southeast and northwest winds and heavy rain, making the pipe piles prone to collapse and tilting. To address these issues, the project adopted the following modification to the fixing structure of photovoltaic support structure 1, thereby ensuring the stability of the photovoltaic support system.

[0024] like Figure 1 As shown, a typhoon-resistant foundation structure for photovoltaic supports includes a photovoltaic support 1 and a foundation 2.

[0025] Foundation 2 is constructed on the ground using a combination of galvanized steel reinforced cages, molds, and marine concrete. These materials provide corrosion and moisture resistance, enabling it to withstand the high humidity and salt spray environment of coastal areas, thus extending its service life. After foundation 2 is prefabricated on the ground, it is hoisted into a pre-dug pit, backfilled with soil, and thus the construction of foundation 2 is completed. The photovoltaic support bracket 1 has a support base 11 at its bottom, which is fixed to the base 21 of foundation 2 by connecting bolts 12, thereby securing the photovoltaic support bracket 1 to foundation 2.

[0026] The foundation 2 includes a base 21 and an anti-overturning section 22. The base 21 has a rhomboid structure, with one diagonal parallel to the wind direction, i.e., one pair of diagonals forms the windward side 23 and the leeward side 24. Strong winds during typhoons are mostly southeast or northwest. In this embodiment, the windward side 23 faces southeast, and the leeward side 24 faces northwest. The anti-overturning section 22 is a rectangular structure integrally formed with the base 21, and is respectively installed on the windward side 23 and the leeward side 24 of the base 21. The length direction of the anti-overturning section 22 is perpendicular to the wind direction, thus enhancing horizontal wind resistance. The bidirectional anti-overturning section 22 can adapt to alternating wind directions (alternating southeast or northwest winds). The presence of anti-overturning sections 22 on both the windward side 23 and the leeward side 24 ensures that the foundation 2 provides stable anti-overturning support during alternating wind directions. When the photovoltaic support 1 is subjected to strong winds from the southeast or northwest, the wind load can be effectively transferred through the base 21 to the anti-overturning part 22 on the windward side 23 and the leeward side 24. The interaction between the anti-overturning part 22 and the soil is used to disperse the horizontal force, thereby significantly improving the overall wind resistance stability of the structure.

[0027] A hoisting lug 25 is provided on the top of the base 21 or the anti-overturning part 22. The hoisting lug 25 is installed during the pouring of the foundation 2 and is embedded in the foundation 2. The hoisting lug 25 facilitates the transportation and installation of the foundation 2 and reduces the construction difficulty. In this embodiment, the hoisting lug 25 is provided on the top of the anti-overturning part 22.

[0028] The base 21 has a hollow interior, which is filled with soil and rock or grout. The hollow structure reduces the amount of concrete used when pouring the foundation 2, thus lowering costs.

[0029] The base 21 is provided with anti-slip ribs or barbed structures 26 at its bottom. The anti-slip ribs or barbed structures 26 are used to embed the base 21 into the soil layer, increasing the friction between the base 21 and the soil, resisting the horizontal shear force caused by the typhoon, and preventing the base 21 from shifting. In this embodiment, the base 21 is provided with an inverted T-shaped barbed structure 26 at its bottom.

[0030] This embodiment also includes a stress monitoring mechanism, comprising a measuring bolt 3, a gasket-type pressure sensor 31, and a monitoring and display device. The measuring bolt 3 passes through the gasket-type pressure sensor 31 and the bracket base 11 in sequence and is then fixed on the base 21. The gasket-type pressure sensor 31 is electrically connected to the monitoring and display device. The gasket-type pressure sensor 31 monitors the stress deformation, fracture, loosening, and failure of the measuring bolt 3 in real time, providing early warning of the extreme load risk caused by typhoons, so as to facilitate timely emergency measures.

[0031] Example 2:

[0032] like Figure 2 As shown, the difference between Embodiment 2 and Embodiment 1 is that the tops of both the base 21 and the anti-overturning part 22 are exposed outside the soil, and the tops of both the base 21 and the anti-overturning part 22 are provided with a windward slope 27 and a leeward slope 28. When strong winds blow towards the windward slope 27 or the leeward slope 28, part of the horizontal load generated by the strong wind can be converted into downward pressure, increasing the friction between the bottom of the base 21 and the soil, thereby further improving the anti-overturning force. In addition, the windward slope 27 and the leeward slope 28 can also achieve rapid drainage, preventing water accumulation from eroding the top of the foundation 2.

[0033] Example 3:

[0034] like Figure 3 As shown, the difference between Embodiment 3 and Embodiment 1 is that the base 21 and the anti-overturning part 22 respectively use a structure that is narrow at the top and wide at the bottom, and the sides form a slope 29. The soil can press on the slope 29 of the base 21 and the anti-overturning part 22, thereby using the self-weight of the soil to enhance the pull-out resistance of the foundation 2.

[0035] Apart from the above, the rest of Embodiment 3 is the same as Embodiment 1, so it will not be repeated here.

[0036] Example 4:

[0037] like Figure 4As shown, the difference between Embodiment 4 and Embodiment 2 is that the lower part of the base 21 and the anti-overturning part 22, except for the top, uses a structure that is narrow at the top and wide at the bottom. The side of the lower part forms a slope 29, and the soil can press on the slope 29 of the base 21 and the anti-overturning part 22, thereby using the self-weight of the soil to enhance the pull-out resistance of the foundation 2.

[0038] Apart from the above, the rest of Embodiment 4 is the same as Embodiment 2, so it will not be repeated here.

[0039] The above-described embodiments are merely illustrative of the present invention. Any equivalent embodiments made by those skilled in the art, without departing from the scope of the technical features disclosed in the present invention, using partial modifications or alterations to the technical content disclosed in the present invention, shall still fall within the scope of the technical features of the present invention.

Claims

1. A typhoon-resistant foundation structure for photovoltaic supports, characterized in that: The system includes a photovoltaic support structure and a foundation. The photovoltaic support structure is fixed on the foundation, which is buried in the soil. The foundation includes a base and an anti-overturning part. The base has a windward side and a leeward side, and the anti-overturning part is respectively provided on the windward side and the leeward side of the base. The base has a rhomboid structure, and one pair of opposite corners of the base is set as the windward side and the leeward side; The tops of both the base and the anti-overturning part are exposed outside the soil, and the tops of both the base and the anti-overturning part are provided with a windward slope and a leeward slope. The base and the anti-overturning part, except for the top, use a structure that is narrow at the top and wide at the bottom. The sides of the lower part form a slope, and the soil can press on the slope of the base and the anti-overturning part. The base has a hollow structure inside, which is filled with soil and rock or grout. The bottom of the base is provided with anti-slip ribs or barbed structures; The photovoltaic bracket has a bracket base at its bottom and also includes connecting bolts. The bracket base is fixed to the base by the connecting bolts. It also includes a measuring bolt, a gasket-type pressure sensor, and a monitoring and display device. The measuring bolt passes through the gasket-type pressure sensor and the bracket base in sequence and is then fixed on the base. The gasket-type pressure sensor is electrically connected to the monitoring and display device.

2. The typhoon-resistant foundation structure for photovoltaic supports according to claim 1, characterized in that: The anti-overturning part is a rectangular structure integrally formed with the base.

3. The typhoon-resistant foundation structure for photovoltaic supports according to claim 1, characterized in that: The top of the base or the anti-overturning part is provided with a hoisting lug.

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