Pile foundation structure for rugged topography and photovoltaic device

Abstract

The utility model relates to a pile foundation structure for rugged topography and a photovoltaic device.The pile foundation structure comprises a pile column, a pull-press rod and a reinforcing assembly, the pile column comprises a plurality of pile foundations arranged at intervals, each pile foundation comprises a first section and a second section which are connected with each other, the first section is used for being embedded in a soil layer, and the second section extends to the position above the soil layer; the highest heights of the pile foundations are equal, one end of each pull-press rod is connected with the second section of one of the two adjacent pile foundations, each pull-press rod is connected between the two adjacent second sections, each pull-press rod is connected between the two second sections with different lengths, and the reinforcing assemblies are connected to the peripheries of the first sections of the pile foundations. And the reinforcing assembly is embedded in the soil layer. According to the technical scheme, the rigidity difference between the second section with the long length and the second section with the relatively short length is reduced, the structural consistency and the overall strength of the pile column are improved, and then the purpose of improving the sidesway strength between adjacent pile foundations is achieved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of pile foundation, in particular, to a pile foundation structure for undulating terrain and a photovoltaic device. BACKGROUND

[0002] In undulating terrain, such as mountainous, hilly and other complex terrain conditions, in order to ensure the structural safety of the components (such as photovoltaic modules) above the pile foundation, the height of the pile foundation at different positions often needs to be adjusted, which will result in different heights of different pile foundations protruding from the ground. According to the pile foundation lateral stiffness calculation formula, the pile foundation lateral stiffness is inversely proportional to the height of the pile foundation protruding from the ground. The greater the height of the pile foundation protruding from the ground, the smaller the pile lateral stiffness; on the contrary, the greater the height of the pile foundation protruding from the ground, the greater the pile lateral stiffness. The arrangement of pile foundations of different lengths in the same group of supports requires a "stiffness difference", and the support structure of the group of supports deforms uncoordinatedly under extreme wind load conditions, which will cause additional displacement of the components above the pile foundation and additional stress, and aggravate the damage to the structure.

[0003] Therefore, it is necessary to take measures to control the "stiffness difference" of the complex terrain photovoltaic long and short pile foundation, so as to make the lateral stiffness of the pile foundation of the same group of supports similar, so as to avoid the additional stress damage caused by uncoordinated deformation. CONTENT OF THE INVENTION

[0004] The purpose of the present disclosure is to provide a pile foundation structure for undulating terrain and a photovoltaic device to solve the technical problems existing in the related art.

[0005] In order to achieve the above purpose, the first aspect of the present disclosure provides a pile foundation structure for undulating terrain, comprising:

[0006] A pile row comprising a plurality of spaced pile foundations, each of the pile foundations comprising a first section and a second section connected to each other, the first section being used for embedding in the soil layer, and the second section extending above the soil layer, the highest height of each of the pile foundations being equal;

[0007] A tension-compression rod connected between two adjacent second sections, and the tension-compression rod is connected between two second sections having different lengths;

[0008] A reinforcing component connected to the outer periphery of the first section of the pile foundation, and the reinforcing component is embedded in the soil layer.

[0009] Optionally, the reinforcing component is detachably connected to the first section of the pile foundation.

[0010] Optionally, the reinforcing assembly comprises a first reinforcing plate, a second reinforcing plate, and a first fastening bolt, the first reinforcing plate has a first through hole penetrating through the thickness of the first reinforcing plate, the second reinforcing plate has a second through hole penetrating through the thickness of the second reinforcing plate, and the first fastening bolt is sequentially arranged in the first through hole and the second through hole to clamp the first reinforcing plate and the second reinforcing plate on both sides of the first section.

[0011] Optionally, the reinforcing assembly further comprises a first clasp plate and a second clasp plate, the first clasp plate is connected to one side of the first reinforcing plate close to the second reinforcing plate, and a first notch groove is formed on the side of the first clasp plate away from the first reinforcing plate.

[0012] The second clasp plate is connected to one side of the second reinforcing plate close to the first reinforcing plate, and a second notch groove is formed on the side of the second clasp plate away from the second reinforcing plate, so that when the first fastening bolt is locked in the first through hole and the second through hole, the first notch groove and the second notch groove form a shape matching the outer contour of the pile foundation.

[0013] Optionally, the tensioning rod comprises a rod body and a connecting assembly connected to both ends of the rod body, and the rod body is detachably connected to the second sections of two adjacent pile foundations through the connecting assembly.

[0014] Optionally, the connecting assembly comprises a first half hoop, a second half hoop, and a locking member, the first half hoop and the second half hoop are arranged opposite to each other, and the locking member passes through the first half hoop and the second half hoop and is used for fastening and connecting the first half hoop and the second half hoop to the second section of the pile foundation.

[0015] Optionally, the connecting assembly is hinged to the end of the rod body.

[0016] Optionally, two tensioning rods are connected between two adjacent pile foundations, and the two tensioning rods are arranged in cross.

[0017] Optionally, the plurality of pile foundations comprises a first pile foundation, a second pile foundation, and a third pile foundation, one tensioning rod is connected between the first pile foundation and the second pile foundation, and one tensioning rod is connected between the second pile foundation and the third pile foundation, and the tensioning rod connected between the first pile foundation and the second pile foundation and the tensioning rod connected between the second pile foundation and the third pile foundation are connected to each other.

[0018] The second aspect of the present disclosure provides a photovoltaic device, comprising a photovoltaic assembly and a pile foundation structure as described above, and the photovoltaic assembly is connected to the second section of the pile foundation of the pile foundation structure.

[0019] Through the technical scheme, the maximum height of each pile foundation in the pile row is equal, so that the assembly of the related components installed on the second section of the pile foundation is facilitated, the installation difficulty of the related components is reduced, and the axial stiffness of the tension-compression rod is converted into the lateral displacement stiffness of the long pile by arranging the tension-compression rod between the adjacent two pile foundations, which is equivalent to increasing the lateral displacement stiffness of the long pile, thereby reducing the stiffness difference between the second section with a relatively long length and the second section with a relatively short length, improving the structural consistency and overall strength of the pile row, and achieving the purpose of improving the lateral displacement strength between the adjacent pile foundations.

[0020] In order to further improve the stability of the pile row, the pile foundation structure further comprises a reinforcing assembly, the reinforcing assembly is connected to the outer periphery of the first section of the pile foundation, and the reinforcing assembly is also embedded in the soil layer, so that the reinforcing structure is connected to the pile foundation, the load can be better transmitted to the foundation, the overall bearing capacity of the foundation is improved, and the connection of the reinforcing structure and the pile foundation can enhance the anti-sliding stability of the foundation and prevent the foundation from sliding under the action of horizontal load.

[0021] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0023] Figure 1 is a front view of the pile foundation structure provided by the first exemplary embodiment of the present disclosure;

[0024] Figure 2 is a front view of the pile foundation structure provided by the second exemplary embodiment of the present disclosure;

[0025] Figure 3 is a front view of the pile foundation structure provided by the third exemplary embodiment of the present disclosure;

[0026] Figure 4 is an enlarged schematic view of the pile foundation structure provided by the first exemplary embodiment of the present disclosure;

[0027] Figure 5 is a top view of the pile foundation and the reinforcing assembly in a connected state according to the first exemplary embodiment of the present disclosure;

[0028] Figure 6 is a top view of the pile foundation and the connecting assembly in a connected state according to the first exemplary embodiment of the present disclosure.

[0029] EXPLANATION OF REFERENCE NUMERALS

[0030] 1-pile foundation structure; 10-pile row; 11-pile foundation; 110-first section; 111-second section; 112-first pile foundation; 113-second pile foundation; 114-third pile foundation; 20-tension-compression rod; 21-rod body; 22-connection assembly; 221-first half hoop body; 222-second half hoop body; 223-locking piece; 30-strengthening assembly; 31-first strengthening plate; 32-second strengthening plate; 33-first fastening bolt; 34-first clasp plate; 340-first notch groove; 35-second clasp plate; 350-second notch groove. DETAILED DESCRIPTION

[0031] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0032] In the present disclosure, the orientation words such as "upper", "lower", "left", "right", etc. used to indicate the orientation or position relationship are only for the convenience of describing the present disclosure and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, and a specific orientation configuration and operation, and therefore cannot be understood as a limitation on the present disclosure. The terms "inner" and "outer" refer to the inner and outer of the corresponding structure profile.

[0033] In addition, "horizontal direction" and "vertical direction" can refer to the horizontal direction and vertical direction shown in Figure 1 and Figure 3 In addition, it should be noted that the terms such as "first", "second", etc. are used to distinguish one element from another element, and do not have sequentiality and importance. In addition, in the description with reference to the drawings, the same reference signs in different drawings represent the same elements.

[0034] In the description of the present disclosure, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "connection", "connection", "installation" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0035] For the pile foundation structure 1 of the undulating terrain, in order to ensure the overall height consistency of the pile row, as shown in Figures 1 to 3 , the pile foundation 11 located in the area with higher terrain protrudes the ground with a smaller height h, and the corresponding lateral stiffness is correspondingly larger, while for the pile foundation 11 located in the area with lower terrain, the height H protruding the ground is relatively larger, and this part also has the problem of smaller lateral stiffness.

[0036] Based on this, with reference to Figures 1 to 6 The first aspect of the present disclosure provides a pile foundation structure 1 for undulating terrain, comprising a pile row 10, a tension-compression rod 20 and a reinforcing assembly 30, the pile row 10 comprises a plurality of spaced piles 11, each pile 11 comprises a first section 110 and a second section 111 connected with each other, the first section 110 is used for embedding in the soil layer, and the second section 111 extends above the soil layer, the highest height of each pile 11 is equal, one end of the tension-compression rod 20 is connected with the second section 111 of one of the two adjacent piles 11, the tension-compression rod 20 is connected between the two adjacent second sections 111, and the tension-compression rod 20 is connected between the two second sections 111 with different lengths, and the reinforcing assembly 30 is connected to the outer periphery of the first section 110 of the pile 11, and the reinforcing assembly 30 is embedded in the soil layer.

[0037] Through the above technical solution, the highest height of each pile 11 of the pile row 10 is equal, which facilitates the assembly of related components installed on the second section 111 of the pile 11, reduces the installation difficulty of the related components, and because the lateral displacement stiffness of the pile 11 is negatively correlated with the height of the pile 11 protruding from the ground, by arranging the tension-compression rod 20 between the two adjacent piles 11, the axial stiffness of the tension-compression rod 20 can be converted into the lateral displacement stiffness of the long pile, which is equivalent to increasing the lateral displacement stiffness of the long pile, thereby reducing the stiffness difference between the second section 111 with relatively long length and the second section 111 with relatively short length, improving the structural consistency and overall strength of the pile row 10, and further achieving the purpose of improving the lateral displacement strength between the two adjacent piles 11.

[0038] In order to further improve the stability of the above-mentioned pile row 10, the above-mentioned pile foundation structure 1 further comprises a reinforcing assembly 30, which is connected to the outer periphery of the first section 110 of the pile 11, and the reinforcing assembly 30 is also embedded in the soil layer, so that the reinforcing structure is connected with the pile 11, the load can be better transmitted to the foundation, the overall bearing capacity of the foundation is improved, and the connection of the reinforcing structure with the pile 11 can enhance the anti-sliding stability of the foundation to prevent the foundation from sliding under the action of horizontal load.

[0039] Optionally, the reinforcing assembly 30 is detachably connected to the first section 110 of the pile 11. On the one hand, the detachable connection makes the installation and disassembly of the reinforcing assembly 30 more convenient and flexible, so it can be applied to a wider range of engineering application scenarios, and can be adjusted according to actual construction needs to improve construction efficiency; on the other hand, the detachable connection makes the inspection and maintenance of the reinforcing assembly 30 more convenient, and when problems are found in the pile 11 or the reinforcing assembly 30, the reinforcing assembly 30 can be easily disassembled, repaired or replaced without damaging the entire foundation structure.

[0040] The present disclosure does not limit the specific structure and reinforcing method of the reinforcing assembly 30 described above, as long as the reinforcing effect on the lateral displacement stiffness of the pile foundation 11 can be achieved. For example, in an exemplary embodiment provided by the present disclosure, as shown in Figure 4 、 Figure 5 The reinforcing assembly 30 can include a first reinforcing plate 31 having a first through hole penetrating through the thickness thereof, a second reinforcing plate 32 having a second through hole penetrating through the thickness thereof, and a first fastening bolt 33 sequentially penetrating and locked in the first through hole and the second through hole, so that the first reinforcing plate 31 and the second reinforcing plate 32 are clamped on both sides of the first section 110. By screwing the first fastening bolt 33, the first fastening bolt 33 sequentially penetrating the first through hole of the first reinforcing plate 31 and the second through hole of the second reinforcing plate 32 can lock the first reinforcing plate 31 and the second reinforcing plate 32 on both sides of the pile foundation 11, thereby achieving relative fixation with the pile foundation 11. The arrangement of the second reinforcing plate 32 can increase the contact area between the pile foundation 11 and the soil layer, i.e., by increasing the effective bearing area of the soil layer and improving the mechanical properties of the soil body, the overall bearing capacity of the structure is enhanced, and the anti-overturning and anti-sliding capacity of the pile foundation 11 is improved, the overall stability is enhanced, especially in soft soil or poor geological conditions. In addition, the reinforcing assembly 30 can also disperse the load, reduce the local settlement, reduce the settlement difference of the pile foundation 11 and the superstructure thereon, and improve the service performance.

[0041] In order to further improve the connection stability between the reinforcing assembly 30 and the pile foundation 11, as shown in Figure 4 、 Figure 5 The reinforcing assembly 30 further includes a first clasp plate 34 and a second clasp plate 35. The first clasp plate 34 is connected to the side of the first reinforcing plate 31 close to the second reinforcing plate 32, and a first notched groove 340 is formed on the side of the first clasp plate 34 away from the first reinforcing plate 31. The second clasp plate 35 is connected to the side of the second reinforcing plate 32 close to the first reinforcing plate 31, and a second notched groove 350 is formed on the side of the second clasp plate 35 away from the second reinforcing plate 32. When the first fastening bolt 33 is locked in the first through hole and the second through hole, the shape enclosed by the first notched groove 340 and the second notched groove 350 matches the outer contour of the pile foundation 11. When the first reinforcing plate 31 and the second reinforcing plate 32 are connected and fixed by the first fastening bolt 33, the first clasp plate 34 and the second clasp plate 35 can be clamped on both sides of the pile foundation 11, i.e., the pile foundation 11 is accommodated between the first notched groove 340 and the second notched groove 350, thereby increasing the contact area with the pile foundation 11, so that the reinforcing assembly 30 is less likely to loosen with the pile foundation 11.

[0042] As shown in Figure 4As shown, the reinforcing assembly 30 can include a plurality of first clamping ring plates 34 and a plurality of second clamping ring plates 35, which are arranged in a vertical direction and are spaced apart from each other, so as to further increase the contact area with the pile foundation 11, improve the connection stability and the anti-pulling effect of the pile foundation 11.

[0043] In order to improve the stability of the connection between the first clamping ring plate 34 and the second clamping ring plate 35 and the reinforcing assembly 30, as shown in Figure 5 As shown, the shapes enclosed by the first notch groove 340 and the second notch groove 350 should be matched with the shape of the cross section of the pile foundation 11. For example, for the embodiment in which the cross section of the pile foundation 11 is circular, in an exemplary embodiment provided by the present disclosure, the cross sections of the first notch groove 340 and the second notch groove 350 in the horizontal direction are both formed in a semicircle, so that when the first clamping ring plate 34 and the second clamping ring plate 35 are clamped on the outer periphery of the pile foundation 11, the groove walls of the first notch groove 340 and the second notch groove 350 can be tightly fitted on the outer wall of the pile foundation 11.

[0044] Similarly, for the embodiments in which the cross section of the pile foundation 11 is in other shapes, the first notch groove 340 and the second notch groove 350 can also be formed in corresponding shapes.

[0045] In order to facilitate the connection between the tension-compression rod 20 and the adjacent two pile foundations 11, in an exemplary embodiment provided by the present disclosure, as shown in Figures 1 to 3 As shown, the tension-compression rod 20 can include a rod body 21 and a connecting assembly 22 connected to both ends of the rod body 21, and the rod body 21 is detachably connected to the second sections 111 of the adjacent two pile foundations 11 through the connecting assembly 22. The rod body 21 can be detachably connected to the second sections 111 of the adjacent two pile foundations 11 through the connecting assembly 22, and the rod body 21 does not directly contact the pile foundation 11, which is more convenient for flexible adjustment during the assembly process of the pile foundation 11 without affecting the stress bearing of the rod body 21.

[0046] The present disclosure does not limit the specific connection structure and connection mode of the connecting assembly 22. For example, in an exemplary embodiment provided by the present disclosure, as shown in Figure 6As shown, the connecting assembly 22 can include a first half hoop body 221, a second half hoop body 222, and a locking member 223. The first half hoop body 221 is arranged opposite to the second half hoop body 222. The locking member 223 passes through the first half hoop body 221 and the second half hoop body 222, and is used to fasten and connect the first half hoop body 221 and the second half hoop body 222 on the second section 111 of the pile foundation 11. During the connecting process, the first half hoop body 221 and the second half hoop body 222 can be sleeved on the second section 111 to be connected, and then the first half hoop body 221 and the second half hoop body 222 are locked by the locking member 223, so as to tighten the first half hoop body 221 and the second half hoop body 222 on the outer periphery of the second section 111 of the pile foundation 11, and realize the relative regulation between the rod body 21 and the second section 111 of the pile foundation 11.

[0047] It should be noted that the distance between the adjacent two pile foundations 11 is not fixed, and there may be a case that the distance between some pile foundations 11 is large and the distance between some pile foundations 11 is small. In order to facilitate the connection of the tension-compression rod 20 between the pile foundations 11 with different distances, in the present disclosure, the connecting assembly 22 is hinged with the end of the rod body 21. That is, the connecting assembly 22 and the end of the rod body 21 are rotationally connected, so that during the connecting process, the rod body 21 can rotate around the end of the rod body 21, so as to adjust the angle of the rod body 21 to adapt to the distance between the two pile foundations 11 to be connected, so as to reduce or avoid the torsional force of the rod body 21 during the connecting process, and improve the stability of the rod body 21 during the connecting process.

[0048] In an exemplary embodiment provided in the present disclosure, the rod body 21 can be made of one of an angle steel, a channel steel and a U-shaped steel. Specifically, the axial stiffness of the tension-compression rod 20 is related to the cross-sectional form of the tension-compression rod 20. When the stiffness difference between the long pile and the short pile is not significant, an angle steel or a channel steel with smaller axial stiffness can be used; when the stiffness difference between the long pile and the short pile is more significant, a thin-walled U-shaped steel with larger axial stiffness can be used.

[0049] In order to further improve the connection stability and overall strength between the adjacent two pile foundations 11, optionally, as shown in Figure 1 , Figure 3 As shown, two tension-compression rods 20 are connected between the adjacent two pile foundations 11, and the two tension-compression rods 20 are arranged in a cross manner. The cross arrangement of the two tension-compression rods 20 can provide support in two directions, effectively disperse and transfer loads, and enhance the stability of the structure. In addition, the cross arrangement can also provide better shear and bending resistance, reduce the relative displacement between the pile foundations 11, and make the pile foundations 11 more stable in horizontal and vertical directions.

[0050] For example, in an exemplary embodiment provided by the present disclosure, the two tension-compression rods 20 connected between the above-mentioned two adjacent pile foundations 11 can be formed in an X shape or a V shape, and the present disclosure does not limit this.

[0051] Alternatively, in other manners provided by the present disclosure, as shown in Figure 1 , Figure 3 the plurality of pile foundations 11 include a first pile foundation 112, a second pile foundation 113, and a third pile foundation 114, one tension-compression rod 20 is connected between the first pile foundation 112 and the second pile foundation 113, and one tension-compression rod 20 is connected between the second pile foundation 113 and the third pile foundation 114, and the tension-compression rod 20 connected between the first pile foundation 112 and the second pile foundation 113 and the tension-compression rod 20 connected between the second pile foundation 113 and the third pile foundation 114 are connected to each other. At this time, a certain connection relationship can be established between the two adjacent tension-compression rods 20, so that the tension-compression rods 20 are more difficult to displace in the vertical direction of the pile foundation 11 under the limitation of each other, further improving the firmness and stability of the cooperation between the tension-compression rods 20 and the pile foundation 11.

[0052] The second aspect of the present disclosure provides a photovoltaic device, which comprises a photovoltaic assembly and the above-mentioned pile foundation structure 1, and the photovoltaic assembly is connected to the second section 111 of the pile foundation 11 of the pile foundation structure 1. The photovoltaic device has all the beneficial effects of the above-mentioned pile foundation structure 1, and the present disclosure does not repeat it here.

[0053] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-mentioned embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0054] In addition, it should be noted that each specific technical feature described in the above-mentioned specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combination manners.

[0055] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as it does not deviate from the idea of the present disclosure, it should also be considered as disclosed by the present disclosure.

Claims

1. A pile foundation structure for undulating terrain, characterized by, The utility model relates to a pile foundation structure, including: a pile array, the pile array includes a plurality of interval arrangement pile foundation, each pile foundation includes mutually connected first section and second section, the first section is used for embedding in the soil layer, the second section extends to the soil layer above, the highest height of each pile foundation is equal; a tension-compression rod, the tension-compression rod is connected between two adjacent second sections, and the tension-compression rod is connected between two second sections with different lengths; a reinforcing assembly, the reinforcing assembly is connected on the outer periphery of the first section of the pile foundation, and the reinforcing assembly is embedded in the soil layer.

2. A pile foundation structure for undulating terrain according to claim 1, characterized in that, The reinforcing assembly is detachably connected on the first section of the pile foundation.

3. The pile foundation structure for undulating terrain according to claim 1, characterized in that: The reinforcing assembly includes a first reinforcing plate, a second reinforcing plate and a first fastening bolt, the first reinforcing plate has a first through hole penetrating through its own thickness direction, the second reinforcing plate has a second through hole penetrating through its own thickness direction, and the first fastening bolt is sequentially inserted and locked in the first through hole and the second through hole to make the first reinforcing plate and the second reinforcing plate clamped on both sides of the first section respectively.

4. A pile foundation structure for undulating terrain according to claim 3, characterised in that, The reinforcing assembly further includes a first clasp plate and a second clasp plate, the first clasp plate is connected on one side of the first reinforcing plate close to the second reinforcing plate, and a first notch groove is formed on the side of the first clasp plate away from the first reinforcing plate; The second clasp plate is connected on one side of the second reinforcing plate close to the first reinforcing plate, and a second notch groove is formed on the side of the second clasp plate away from the second reinforcing plate, so that when the first fastening bolt is locked in the first through hole and the second through hole, the first notch groove and the second notch groove enclose a shape matching the outer contour of the pile foundation.

5. A pile foundation structure for undulating terrain according to any one of claims 1-4, characterized in that, The tension-compression rod includes a rod body and a connecting assembly connected on both ends of the rod body, and the rod body is detachably connected with the second sections of two adjacent pile foundations through the connecting assembly.

6. A pile foundation structure for undulating terrain according to claim 5, characterised in that, The connecting assembly includes a first half hoop, a second half hoop and a locking member, the first half hoop and the second half hoop are oppositely arranged, the locking member passes through the first half hoop and the second half hoop and is used for fastening and connecting the first half hoop and the second half hoop on the second section of the pile foundation.

7. A pile foundation structure for undulating terrain according to claim 5, characterized by The connecting assembly is hinged with the end of the rod body.

8. A pile foundation structure for undulating terrain according to any one of claims 1-4, characterized in that, Two tension-compression rods are connected between two adjacent pile foundations, and the two tension-compression rods are cross arranged.

9. A pile foundation structure for undulating terrain according to any one of claims 1-4, characterized in that, The plurality of pile foundations includes a first pile foundation, a second pile foundation and a third pile foundation, one tension-compression rod is connected between the first pile foundation and the second pile foundation, one tension-compression rod is connected between the second pile foundation and the third pile foundation, and the tension-compression rods connected between the first pile foundation and the second pile foundation and the tension-compression rods connected between the second pile foundation and the third pile foundation are connected with each other.

10. A photovoltaic device, characterized by The utility model further relates to a photovoltaic module structure, including a photovoltaic module and the pile foundation structure according to any one of claims 1-9, and the photovoltaic module is connected to the second section of the pile foundation of the pile foundation structure.

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