Photovoltaic support foundation structure resistant to frost heaving of the ground

Abstract

The utility model discloses a photovoltaic support foundation structure of resisting ground soil frost heaving, including prism foundation, connecting assembly, concrete buttress, installation component, the prism foundation is set in the bottom of photovoltaic support foundation structure of resisting ground soil frost heaving and is arranged to be narrow on the top and wide on the bottom, connecting assembly includes lower connecting portion and upper connecting portion, and the top of prism foundation is connected concrete buttress through lower connecting portion, and upper connecting portion stretches out concrete buttress from lower connecting portion and sets up, and upper connecting portion is connected with the installation component of being able to fix upper portion stand in upper connecting portion on the top, and upper portion stand can be fixed after the height of sliding adjustment along upper connecting portion, the utility model discloses the form of prism foundation, increases the contact area of foundation and ground soil, and through the geometric shape design of being narrow on the top and wide on the bottom, effectively prevents the foundation from moving upward, prevents the foundation slip caused by ground soil frost heaving, and significantly improves the stability and security of photovoltaic support.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation technology, and in particular to a photovoltaic support foundation structure resistant to soil frost heave. Background Technology

[0002] With the rapid development of photovoltaic power generation technology, seasonally frozen land areas in my country, rich in solar resources, have become important development areas for photovoltaic projects. However, installing photovoltaic support foundations in these areas faces severe challenges. Because the foundation soil is prone to frost heave in low-temperature environments, the moisture in the soil pores freezes, causing frost heave. This results in the steel pipe pile foundation being subjected to tangential and horizontal frost heave forces, which can cause the photovoltaic support to tilt or settle, affecting the normal operation of the photovoltaic power generation system.

[0003] Traditional photovoltaic (PV) support foundations primarily utilize precast piles or cast-in-place piles, but these foundation types present numerous challenges during construction. While precast and cast-in-place piles are suitable for areas with poor geological conditions, traditional construction methods are difficult and costly in rocky terrain and steep slopes. Furthermore, in seasonally frozen soil regions, existing pile foundations are susceptible to differential frost pull-out due to the relatively small weight of the PV panels and other loads, leading to reduced power generation efficiency and even fracture damage.

[0004] Currently, while conventional pile foundations offer good resistance to frost heave, simply increasing pile length, although it increases surface friction, is unacceptable from a practical investment cost perspective for sites with excessive seasonal freezing depth or severe frost heave. Furthermore, for foundations with poor geological conditions such as silt deposits, longer piles are often required to ensure foundation support strength, significantly increasing material and installation costs and potentially causing settlement issues. Existing photovoltaic support foundations lack specificity in material selection and structural design, making them unsuitable for different geological conditions and engineering requirements, thus limiting their flexibility and applicability in practical applications. Therefore, a new type of frost-heave-resistant photovoltaic support foundation is urgently needed to address the problems of existing foundation types in seasonally frozen soil areas, improving project safety and economy.

[0005] Existing technology 1: A steel pipe pile photovoltaic support foundation for preventing soil frost heave (CN118441669A) The steel pipe pile photovoltaic support foundation for preventing soil frost heave increases the contact area with the foundation soil through concrete piles, but from the perspective of actual investment cost, there are still problems such as large material and installation costs, and difficulty in installation and maintenance.

[0006] Existing technology 2: Anti-frost heave photovoltaic support foundation (CN118309101A) The anti-frost heave photovoltaic support foundation introduces anti-frost heave filling material, which can reduce or eliminate frost heave force on the support foundation. However, the connection between the photovoltaic support foundation and the upper photovoltaic support structure is not stable enough, and it is difficult to effectively protect the photovoltaic support structure from erosion by rainwater and other factors.

[0007] Existing technology 3: A frost-resistant pile foundation for photovoltaic bracket installation in frozen soil areas (CN222332749U) can effectively prevent foundation slippage caused by frost heave of the foundation soil, but only a connecting plate is used to connect the lower foundation and the photovoltaic panel, which has stability problems under the action of external factors such as wind, snow and rain.

[0008] Therefore, based on years of experience and practice in related industries, the inventor proposes a photovoltaic support foundation structure that is resistant to soil frost heave, in order to overcome the shortcomings of existing technologies. Utility Model Content

[0009] The purpose of this invention is to provide a photovoltaic support foundation structure resistant to frost heave, overcoming the problem in existing technologies where the photovoltaic support foundation in permafrost areas shifts position due to frost heave, making it difficult to stably connect the lower foundation with the upper photovoltaic support and affecting the normal operation of the photovoltaic power generation system. This invention adopts a truncated pyramid foundation form, which increases the contact area between the foundation and the foundation soil. Through the geometric design of being narrow at the top and wide at the bottom, it effectively prevents the foundation from moving upward and prevents foundation slippage caused by frost heave, significantly improving the stability and safety of the photovoltaic support.

[0010] The purpose of this utility model is achieved as follows: a photovoltaic support foundation structure resistant to frost heave of the foundation soil includes a frustum foundation, a connecting component, a concrete pier, and an installation component. The frustum foundation is positioned at the bottom of the photovoltaic support foundation structure, narrower at the top and wider at the bottom. The connecting component includes a lower connecting part and an upper connecting part. The top of the frustum foundation is connected to the concrete pier through the lower connecting part. The upper connecting part extends upward from the lower connecting part to the concrete pier. An upper column is connected to the upper connecting part. The upper column can slide along the upper connecting part to adjust its height and then be fixed. The installation component is connected to the upper connecting part to fix the upper column to the upper connecting part.

[0011] In a preferred embodiment of the present invention, the upper connecting part includes a pre-embedded steel pipe preset in the concrete support, the bottom end of the pre-embedded steel pipe is connected to the lower connecting part, and the installation component is set at the position of the pre-embedded steel pipe above the concrete support.

[0012] In a preferred embodiment of the present invention, the installation assembly includes a plurality of fastening bolts, which are positioned above the pre-embedded steel pipe on the concrete support. The fastening bolts can be screwed inward to radially abut and fix the upper column, or screwed outward to loosen the upper column.

[0013] In a preferred embodiment of the present invention, the installation assembly includes a sealing ring that can seal between the embedded steel pipe and the upper column, the sealing ring being disposed at the top end of the embedded steel pipe.

[0014] In a preferred embodiment of the present invention, the lower connecting part includes a steel plate base, and the pre-embedded steel pipe is located on top of the steel plate base and is fixedly connected to the steel plate base.

[0015] In a preferred embodiment of this utility model, a stiffening rib is connected between the pre-embedded steel pipe and the steel plate base. The number of stiffening ribs is multiple, and the multiple stiffening ribs are radially distributed on the top surface of the steel plate base.

[0016] In a preferred embodiment of this utility model, the steel plate base and the top surface of the frustum foundation are connected by expansion bolts, and the expansion bolts are located on the outside of the stiffening ribs.

[0017] In a preferred embodiment of this utility model, the steel plate base is provided with an elongated oval connecting hole, and the top end of the expansion bolt passes through the connecting hole and is fixed by a connecting nut.

[0018] In a preferred embodiment of the present invention, the top surface of the frustum foundation is provided with a groove for installing the connecting component, and the bottom of the concrete support is embedded in the groove.

[0019] In a preferred embodiment of this utility model, an anti-corrosion layer is provided on the outer surface of the frustum foundation.

[0020] As described above, the photovoltaic support foundation structure of this utility model that resists soil frost heave has the following beneficial effects:

[0021] 1. The use of a truncated pyramid foundation increases the contact area between the foundation and the soil. The geometric design, which is narrower at the top and wider at the bottom, effectively prevents the foundation from moving upward and avoids slippage caused by frost heave of the soil, thus significantly improving the stability and safety of the photovoltaic support.

[0022] 2. By reserving a cubic groove, the contact area between the frustum foundation and the concrete support is increased, which makes the concrete support and the frustum foundation tightly connected, thus achieving the stability of the lower foundation. At the same time, it effectively protects the bottom of the photovoltaic support from erosion by rainwater and extends the service life of the photovoltaic support.

[0023] 3. The design of the connecting components to reinforce the columns significantly improves the overall strength and frost resistance of the foundation, effectively solving the problem of frost pull-out that traditional pile foundations are prone to in seasonally frozen soil areas;

[0024] 4. The design of the installation components allows for a tight connection between the upper connecting part and the upper column. The installation components can also provide a fixed connection after the height of the upper column is adjusted, thus realizing flexible adjustment of the photovoltaic bracket height to meet different terrain and engineering requirements.

[0025] 5. The structural design of this utility model has good adaptability. The size and structural form of the foundation can be flexibly adjusted according to different geological conditions, which effectively reduces the project cost and ensures the operability of construction. It is particularly suitable for areas where traditional construction methods are difficult to adapt to, such as bare rock and mountainous terrain with large slopes. Attached Figure Description

[0026] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0027] Figure 1 This is a cross-sectional view of the photovoltaic support foundation structure for resisting soil frost heave according to this utility model.

[0028] Figure 2 This is a top view of the photovoltaic support foundation structure for resisting soil frost heave according to this utility model.

[0029] Figure 3 This is an isometric schematic diagram of the connecting component of this utility model.

[0030] In the picture:

[0031] 100. Photovoltaic support foundation structure resistant to soil frost heave;

[0032] 1. Frustum base; 11. Groove;

[0033] 2. Connecting components; 21. Embedded steel pipe; 22. Steel plate base; 23. Stiffening ribs; 24. Expansion bolts; 25. Connecting nuts;

[0034] 3. Concrete supports;

[0035] 4. Install components; 41. Fastening bolts; 42. Sealing rings;

[0036] 5. Upper column. Detailed Implementation

[0037] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0038] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the present invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on this invention, and these should all be considered within the scope of this invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal connections between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] like Figures 1 to 3 As shown, this utility model provides a photovoltaic support foundation structure 100 resistant to frost heave of the foundation soil, including a frustum foundation 1, a connecting component 2, a concrete support 3, and an installation component 4. The frustum foundation 1 is set at the bottom of the photovoltaic support foundation structure 100 with a narrow top and wide bottom. The connecting component 2 includes a lower connecting part and an upper connecting part. The top of the frustum foundation 1 is connected to the concrete support 3 through the lower connecting part. The upper connecting part extends upward from the lower connecting part to the concrete support 3. The upper connecting part is connected to an upper column 5 (which is a component of the photovoltaic support structure and is used to connect with the photovoltaic support foundation, according to the prior art). The upper column 5 can slide along the upper connecting part to adjust its height and then be fixed. The upper connecting part is connected to the installation component 4, which can fix the upper column 5 to the upper connecting part.

[0041] The problem this invention aims to solve is that, when used in permafrost areas, the photovoltaic support foundation is easily affected by seasonal ambient temperature and ground rainwater thawing. The photovoltaic support foundation is prone to displacement due to frost heave of the foundation soil. In addition, the photovoltaic support column is easily eroded by rainwater, making it difficult to stably connect the lower foundation and the upper photovoltaic support, thereby affecting the normal operation of the photovoltaic power generation system.

[0042] The photovoltaic support foundation structure resistant to soil frost heave of this utility model has the following beneficial effects:

[0043] 1. The use of a truncated pyramid foundation increases the contact area between the foundation and the soil. The geometric design, which is narrower at the top and wider at the bottom, effectively prevents the foundation from moving upward and avoids slippage caused by frost heave of the soil, thus significantly improving the stability and safety of the photovoltaic support.

[0044] 2. The tight combination of concrete supports and truncated pyramid foundations ensures the stability of the lower foundation and effectively protects the bottom of the photovoltaic support from erosion by rainwater, thus extending the service life of the photovoltaic support.

[0045] 3. The design of the connecting components to reinforce the columns significantly improves the overall strength and frost resistance of the foundation, effectively solving the problem of frost pull-out that traditional pile foundations are prone to in seasonally frozen soil areas;

[0046] 4. The design of the installation components allows for a tight connection between the upper connecting part and the upper column. The installation components can also provide a fixed connection after the height of the upper column is adjusted, thus realizing flexible adjustment of the photovoltaic bracket height to meet different terrain and engineering requirements.

[0047] 5. The structural design of this utility model has good adaptability. The size and structural form of the foundation can be flexibly adjusted according to different geological conditions, which effectively reduces the project cost and ensures the operability of construction. It is particularly suitable for areas where traditional construction methods are difficult to adapt to, such as bare rock and mountainous terrain with large slopes.

[0048] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the upper connecting part includes a pre-embedded steel pipe 21 pre-installed in the concrete support 3. The bottom end of the pre-embedded steel pipe 21 is connected to the lower connecting part. An installation component 4 is installed on the pre-embedded steel pipe 21 above the concrete support 3.

[0049] Furthermore, such as Figure 1 , Figure 2 As shown, the mounting assembly 4 includes multiple fastening bolts 41. The fastening bolts 41 are positioned above the pre-embedded steel pipe 21 on the concrete support 3. The fastening bolts 41 are rotatably connected to the pre-embedded steel pipe 21 and are located on one side of the connecting assembly 2. The fastening bolts 41 can be screwed inward to radially abut and fix the upper column 5, or the fastening bolts 41 can be screwed outward to loosen the upper column 5.

[0050] Furthermore, such as Figure 1 As shown, the installation component 4 includes a sealing ring 42 that can seal between the pre-embedded steel pipe 21 and the upper column 5, and the sealing ring 42 is disposed at the top of the pre-embedded steel pipe 21.

[0051] Specifically, the installation component 4 includes fastening bolts 41 and sealing rings 42. The pre-embedded steel pipe 21 is connected and reinforced with fastening bolts 41 and sealing rings 42 to the upper column 5. The fastening bolts 41 constitute the adjustment mechanism of the upper column 5. The height of the upper column 5 of the photovoltaic bracket can be adjusted by rotating the fastening bolts 41. The sealing rings 42 prevent rainwater from seeping in.

[0052] The embedded steel pipe 21 is tightly connected to the upper column 5 using fastening bolts 41 and sealing rings 42, ensuring the stability and sealing of the structure. In addition, the height of the photovoltaic bracket can be flexibly adjusted by adjusting the fastening bolts 41 to meet the installation requirements under different conditions, further optimizing the performance and layout of the photovoltaic system.

[0053] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the lower connecting part includes a steel plate base 22, and a pre-embedded steel pipe 21 is located on the top of the steel plate base 22 and is fixedly connected to the steel plate base 22.

[0054] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, there are multiple stiffening ribs 23 connecting the pre-embedded steel pipe 21 and the steel plate base 22. These stiffening ribs are radially distributed on the top surface of the steel plate base 22.

[0055] Specifically, the stiffening ribs 23 are fixedly connected to the steel plate base 22 by welding and are evenly distributed radially on the upper surface of the steel plate base 22. The stiffening ribs 23 are fixedly connected to the pre-embedded steel pipe 21 and are located on the outside of the pre-embedded steel pipe 21.

[0056] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the top surface of the steel plate base 22 and the frustum foundation 1 are connected by expansion bolts 24, which are located on the outside of the stiffening rib 23.

[0057] Specifically, the expansion bolt 24 is rotatably connected to the steel plate base 22 and is located on the top of the steel plate base 22. The expansion bolt 24 is located outside the pre-embedded steel pipe 21 and on one side of the stiffening rib 23.

[0058] Furthermore, such as Figure 2 As shown, the steel plate base 22 is provided with an elongated oval connecting hole, and the top of the expansion bolt 24 passes through the connecting hole and is fixed by the connecting nut 25.

[0059] The connecting component 2 consists of stiffening ribs 23, a steel plate base 22, expansion bolts 24, and a pre-embedded steel pipe 21. The pre-embedded steel pipe 21 is welded to the steel plate base 22, the stiffening ribs 23 provide stable support for the steel pipe, and the steel plate base 22 is firmly anchored to the frustum foundation 1 by the expansion bolts 24 to form a whole, thereby achieving a stable connection between the column and the foundation.

[0060] The combined design of stiffening ribs 23, steel plate base 22, expansion bolts 24 and pre-embedded steel pipes 21 to reinforce the column significantly improves the overall strength and frost pull-out resistance of the foundation, effectively solving the problem of frost pull-out that is prone to occur in traditional pile foundations in seasonally frozen soil areas.

[0061] Furthermore, such as Figure 1 As shown, the frustum foundation 1 is located at the bottom of the entire photovoltaic support foundation that resists frost heave of the foundation soil. The frustum foundation 1 adopts a frustum shape that is narrower at the top and wider at the bottom. The top surface of the frustum foundation 1 is provided with a groove 11 for installing connecting components, and the bottom of the concrete support pier 3 is embedded in the groove 11. The dimensions of the frustum foundation can be adjusted according to the specific project requirements.

[0062] The concrete support 3 is fixedly connected to the frustum foundation 1 via the connecting component 2 and is located on top of the frustum foundation 1. The upper surface dimensions of the concrete support 3 are consistent with the upper surface dimensions of the frustum foundation 1, and the groove 11 on the upper surface of the frustum foundation 1 is poured and filled.

[0063] The photovoltaic support system features a frustum-shaped foundation design, which enhances the overall structural stability by increasing the contact area with the soil. Its unique geometry, narrower at the top and wider at the bottom, effectively curbs the upward movement of the foundation, thus preventing slippage caused by soil frost heave and ensuring the stability of the entire photovoltaic support system.

[0064] A cubic groove is pre-reserved in the upper part of the frustum foundation to increase the contact area between the frustum foundation and the upper cast-in-place concrete support, thereby significantly enhancing the connection strength between the two. In this way, the concrete support can more firmly anchor the lower foundation, while providing all-round protection for the bottom of the photovoltaic support, effectively resisting erosion that may be caused by the thawing of moisture in the frozen soil. In addition, this design can also significantly improve the structure's ability to resist wind and snow loads, ensuring the long-term stable operation of the photovoltaic support in complex natural environments.

[0065] Furthermore, an anti-corrosion layer is provided on the outer surface of the frustum foundation 1.

[0066] Example 1:

[0067] like Figure 1 , Figure 2 , Figure 3As shown, the frustum base 1 adopts a frustum shape, including an upper surface, a lower surface, a front surface, a rear surface, a left surface, and a right surface. The upper surface has a size of 800×800mm, the lower surface has a size of 1200×1200mm, the height difference between the upper and lower surfaces is 500mm, and the width difference between the front and rear surfaces is 300mm. The upper surface is provided with a groove 11 for installing connecting components, and the depth of the groove 11 is 300mm.

[0068] An embedded steel pipe 21 is installed on the top of the connecting assembly 2, fixedly connected to the steel plate base 22, and located on top of the steel plate base 22. There is one embedded steel pipe 21, with a diameter of 20mm and a length of 500mm. The embedded steel pipe 21 reinforces the upper column 5 by 300mm and is made of Q235B steel.

[0069] Stiffening ribs 23 are fixedly connected to the steel plate base 22 by welding and are evenly distributed radially on the upper surface of the steel plate base 22. The stiffening ribs 23 are also fixedly connected to the embedded steel pipe 21 and are located on the outside of the embedded steel pipe 21. A total of four stiffening ribs 23 are provided. The height of each stiffening rib 23 is 100mm, the width is 80mm, and they are made of Q355 steel. The steel plate base 22 is made of Q355 steel with a thickness of 8mm.

[0070] The expansion bolt 24 is rotatably connected to the steel plate base 22 and is located on the top of the steel plate base 22. The expansion bolt 24 is located on the outside of the pre-embedded steel pipe 21 and on one side of the stiffening rib 23.

[0071] The concrete support 3 is fixedly connected to the frustum foundation 1 via the connecting component 2 and is located on top of the frustum foundation 1. The upper surface dimensions of the concrete support 3 are consistent with the upper surface dimensions of the frustum foundation 1, and the groove 11 on the upper surface of the frustum foundation 1 is poured and filled.

[0072] Mounting component 4 includes fastening bolts 41 and sealing rings 42. The pre-embedded steel pipe 21 is connected to and reinforced with the column using fastening bolts 41 and sealing rings 42. The fastening bolts 41 are M20, and the sealing rings 42 are made of wear-resistant rubber. The height of the photovoltaic bracket can be adjusted by rotating the fastening bolts 41, and the sealing rings 42 prevent rainwater from seeping in.

[0073] The outer surface of the frustum foundation 1 is treated with anti-corrosion coating, with a thickness of 250µm. The surface of the frustum foundation 1 is divided into two sections: the surface above the frost zone is polished with a surface roughness Ra≤0.3µm, and the surface below the frost zone is sandblasted with a surface roughness Ra≥1.0µm.

[0074] During the construction of the photovoltaic support foundation structure 100, which is resistant to frost heave, the foundation location is first determined based on the terrain conditions. A static pile driver is then used to drive the pre-embedded steel pipe 21 into the ground to the designed depth, ensuring verticality. Next, non-frost-heavy materials such as medium or coarse sand are backfilled around the pre-embedded steel pipe 21, with a backfill thickness of 400mm. Finally, concrete supports 3 are poured to ensure a tight bond with the reinforced columns of the pre-embedded steel pipe 21.

[0075] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A photovoltaic support foundation structure resistant to frost heave of the foundation soil, characterized in that, The system includes a frustum foundation, connecting components, concrete supports, and installation components. The frustum foundation, which is narrower at the top and wider at the bottom, is located at the bottom of the photovoltaic support foundation structure that is resistant to frost heave of the foundation soil. The connecting components include a lower connecting part and an upper connecting part. The top of the frustum foundation is connected to the concrete support through the lower connecting part. The upper connecting part extends upward from the lower connecting part and is connected to an upper column. The upper column can slide along the upper connecting part to adjust its height and then be fixed. The installation components are connected to the upper connecting part to fix the upper column to the upper connecting part.

2. The photovoltaic support foundation structure resistant to soil frost heave as described in claim 1, characterized in that, The upper connecting part includes a pre-embedded steel pipe embedded in the concrete support pier, the bottom end of the pre-embedded steel pipe is connected to the lower connecting part, and the installation component is set at the position of the pre-embedded steel pipe above the concrete support pier.

3. The photovoltaic support foundation structure resistant to soil frost heave as described in claim 2, characterized in that, The installation assembly includes multiple fastening bolts, which are positioned above the pre-embedded steel pipe on the concrete support. The fastening bolts can be screwed inward to radially abut and fix the upper column, or screwed outward to loosen the upper column.

4. The photovoltaic support foundation structure resistant to soil frost heave as described in claim 3, characterized in that, The installation assembly includes a sealing ring that can seal between the embedded steel pipe and the upper column, the sealing ring being disposed at the top of the embedded steel pipe.

5. The photovoltaic support foundation structure resistant to soil frost heave as described in claim 2, characterized in that, The lower connecting part includes a steel plate base, and the pre-embedded steel pipe is located on top of the steel plate base and is fixedly connected to the steel plate base.

6. The photovoltaic support foundation structure resistant to soil frost heave as described in claim 5, characterized in that, A stiffening rib is connected between the embedded steel pipe and the steel plate base. There are multiple stiffening ribs, which are radially distributed on the top surface of the steel plate base.

7. The photovoltaic support foundation structure resistant to soil frost heave as described in claim 6, characterized in that, The steel plate base and the top surface of the frustum foundation are connected by expansion bolts, which are located on the outside of the stiffening ribs.

8. The photovoltaic support foundation structure resistant to soil frost heave as described in claim 7, characterized in that, The steel plate base is provided with an elongated oval connecting hole, and the top of the expansion bolt passes through the connecting hole and is fixed by a connecting nut.

9. The photovoltaic support foundation structure resistant to soil frost heave as described in claim 1, characterized in that, The top surface of the truncated pyramid foundation is provided with a groove for installing the connecting component, and the bottom of the concrete support is embedded in the groove.

10. The photovoltaic support foundation structure resistant to soil frost heave as described in claim 1, characterized in that, The outer surface of the frustum foundation is provided with an anti-corrosion layer.

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