Anchor rod foundation of photovoltaic support

Abstract

The anchor rod foundation of the photovoltaic support relates to the technical field of photovoltaic power station construction, the anchor rod foundation comprises an anchor rod and a grouting pile foundation, the anchor rod comprises an anchor rod body, a supporting piece and a supporting cage, the supporting piece and the supporting cage are arranged at the two ends of the anchor rod body respectively, and the supporting cage can contract and stretch in the radial direction of the anchor rod body; the grouting pile foundation is formed outside the anchor rod body in a pouring mode and comprises a foundation bearing platform, a pile foundation body and a pile foundation base which are sequentially arranged, the outer diameter of the foundation bearing platform and the outer diameter of the pile foundation base are larger than the outer diameter of the pile foundation body, and the foundation bearing platform, the pile foundation body and the pile foundation base are wrapped outside the supporting piece, the anchor rod body and the supporting cage in an aligned mode. According to the anchor rod foundation of the photovoltaic support, the pulling resistance of the anchor rod foundation can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power station construction, in particular to an anchor rod foundation of a photovoltaic bracket. Background Art

[0002] In recent years, the photovoltaic industry, as a green and environmentally friendly new energy industry, has ushered in new development opportunities. The scale of the power generation industry has expanded year by year, and the installed capacity of photovoltaics has also increased year by year.

[0003] The main components of a photovoltaic power station include photovoltaic modules, photovoltaic brackets and bracket foundations, among which the bracket foundation is an important condition for ensuring the stable operation of the photovoltaic power generation system. Photovoltaic power stations occupy a large area, have a large number of bracket foundations and a large amount of engineering work, which has a significant impact on the cost of engineering construction.

[0004] The main technical solutions for the existing support foundation are as follows: cast-in-place pile foundation, in which pile holes are formed in the foundation soil by mechanical drilling, steel pipe squeezing or manual excavation at the construction site, and a steel cage is placed inside and concrete is poured to form a pile body; anchor foundation is formed, and the bond strength between the rock and soil layer and the anchor body, and between the anchor body and the grouting body provides pull-out bearing capacity to resist the pull-out force transmitted by the photovoltaic support; in general, the grouting material in the anchor hole is cement slurry, cement mortar or concrete. With the above structure, the support foundation has more reinforcement and high pressure bearing capacity.

[0005] However, the above design requires the pile length to be increased to meet the pull-out requirements of the photovoltaic bracket, which will cause the problem of excessive redundancy of the vertical compressive bearing capacity. The anchor foundation mainly relies on the bonding strength between the rock layer and the anchor body, and between the anchor rod body and the grouting body to provide pull-out bearing capacity. If the bearing capacity is insufficient, it is also necessary to take measures such as increasing the length of the anchor section, increasing the borehole diameter, or increasing the number of anchor rod bodies. Since photovoltaic power stations occupy a large area and have a large number of bracket foundations, the use of the above-mentioned conventional cast-in-place pile foundation or anchor rod foundation will increase the cost of engineering construction.

[0006] In view of this, the inventor has designed an anchor foundation for a photovoltaic bracket based on many years of production design experience in this field and related fields and after repeated experiments, in order to solve the problems existing in the prior art. Utility Model Content

[0007] The utility model aims to provide an anchor foundation for a photovoltaic bracket, which can effectively improve the pull-out resistance of the anchor foundation.

[0008] In order to achieve the above object, the utility model proposes an anchor foundation for a photovoltaic bracket, wherein the anchor foundation comprises:

[0009] An anchor rod, comprising an anchor rod body, a support member and a support cage, wherein the support member and the support cage are respectively arranged at two ends of the anchor rod body, and the support cage can shrink and expand along the radial direction of the anchor rod body;

[0010] The grouting pile foundation is cast outside the anchor rod body, and the grouting pile foundation includes a foundation cap, a pile basic body and a pile foundation base which are arranged in sequence, and the outer diameters of the foundation cap and the pile foundation base are respectively larger than the outer diameters of the pile basic body, and the foundation cap, the pile basic body and the pile foundation base are aligned and wrapped around the support member, the anchor rod body and the support cage.

[0011] The anchor rod foundation of the photovoltaic bracket as described above, wherein the support cage includes at least two mounting parts and multiple support rod assemblies, the two mounting parts are respectively sleeved outside the rod body and slidably cooperate with the rod body, the multiple support rod assemblies are arranged between the two mounting parts and are evenly distributed along the circumferential direction of the anchor rod body, each of the support rod assemblies has a first support rod and a second support rod, one end of the first support rod and one end of the second support rod are rotatably connected, and the other end of the first support rod and the other end of the second support rod are respectively rotatably connected to the two mounting parts.

[0012] In the anchor rod foundation of the photovoltaic support as described above, a pad is provided at the end of the anchor rod body to prevent the support cage from falling off.

[0013] In the anchor rod foundation of the photovoltaic support as described above, a limiting member is fixedly provided on the anchor rod body, and the limiting member is located between the two mounting members.

[0014] In the anchor rod foundation of the photovoltaic support as described above, the first support rod and the second support rod are rotatably connected via a connecting buckle.

[0015] The anchor foundation of the photovoltaic bracket as described above, wherein the support member includes a support plate and a plurality of anchor bars, the support plate is fixed to the end of the anchor body and is perpendicular to the anchor body, and the plurality of anchor bars are fixedly connected to the support plate and are evenly distributed along the circumferential direction of the anchor body.

[0016] In the anchor rod foundation of the photovoltaic support as described above, the anchor bar has a bent portion warped outwardly in the radial direction of the anchor rod body.

[0017] In the anchor foundation of the photovoltaic support as described above, the pile base body and the pile foundation base extend downward into the foundation, and the foundation cap protrudes upward from the foundation.

[0018] In the anchor foundation of the photovoltaic support as described above, the outer diameter of the pile foundation base is greater than the outer diameter of the foundation cap.

[0019] The anchor foundation of the photovoltaic support as described above, wherein the grouting pile foundation is a cement grouting pile foundation, a cement mortar grouting pile foundation or a concrete grouting pile foundation.

[0020] Compared with the prior art, the utility model has the following characteristics and advantages:

[0021] The anchor foundation of the photovoltaic bracket proposed by the utility model has an expansion structure at the bottom, and the contact area between the anchor foundation and the rock and soil layer is increased by setting the pile foundation base at the bottom, which makes full use of the deadweight and strength of the anchor foundation. On the one hand, the compressive bearing capacity of the anchor foundation is improved, and more importantly, the pull-out resistance of the anchor foundation is greatly improved. At the same time, a retractable outward expansion support cage is arranged at the pile foundation base, which enhances the shear strength of the pile foundation base and improves the reliability of the anchor foundation.

[0022] The anchor foundation of the photovoltaic bracket proposed in the utility model increases the outer diameter of the bottom by increasing the pile foundation base, thereby improving the pull-out resistance of the anchor foundation. Under the premise of meeting the bearing capacity requirements, the outer diameter and length of the anchor body can be reduced accordingly, thereby reducing the amount of steel bars and concrete used.

[0023] The anchor rod foundation of the photovoltaic support proposed by the utility model improves the pull-out bearing capacity of the foundation, thereby reducing the number of anchor rod foundations and reducing engineering construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0025] Figure 1 This is a schematic diagram of the structure of the anchor foundation of the photovoltaic support proposed by the utility model;

[0026] Figure 2 It is a structural schematic diagram of the anchor rod in the utility model;

[0027] Figure 3 for Figure 2 A cross-sectional view along the aa axis;

[0028] Figure 4 It is a schematic diagram of drilling in the utility model.

[0029] Description of Reference Numerals

[0030] 100. Anchor foundation; 10. Anchor;

[0031] 11. Anchor rod body; 12. Support member;

[0032] 121. Support plate; 122. Anchor reinforcement;

[0033] 13. Support cage; 131. Mounting parts;

[0034] 132. First support rod; 133. Second support rod;

[0035] 134. Connecting buckle; 14. Pad;

[0036] 15. Limiting parts; 20. Grouting pile foundation;

[0037] 21. Foundation cap; 22. Pile foundation body;

[0038] 23. Pile base; 200. Foundation;

[0039] 300, drilling; 310, bottom plate. DETAILED DESCRIPTION

[0040] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention.

[0041] like Figure 1 As shown, the utility model proposes an anchor foundation 100 of a photovoltaic bracket, the anchor foundation 100 includes an anchor 10 and a grouting pile foundation 20, the anchor 10 includes an anchor body 11, a support 12 and a support cage 13, the support 12 and the support cage 13 are respectively arranged at both ends of the anchor body 11, and the support cage 13 can shrink and stretch along the radial direction of the anchor body 11; the grouting pile foundation 20 is cast outside the anchor body 11, the grouting pile foundation 20 includes a foundation cap 21, a pile basic body 22 and a pile foundation base 23 which are arranged in sequence, and the outer diameters of the foundation cap 21 and the pile foundation base 23 are respectively larger than the outer diameter of the pile basic body 22, the foundation cap 21, the pile basic body 22 and the pile foundation base 23 are respectively wrapped around the support 12, the anchor body 11 and the support cage 13.

[0042] The anchor foundation 100 of the photovoltaic support proposed in the utility model has an expansion structure at the bottom, and the contact area between the anchor foundation 100 and the rock and soil layer in the foundation 200 is increased by setting the pile foundation base 23 at the bottom, which makes full use of the deadweight and strength of the anchor foundation 100, improves the compressive bearing capacity of the anchor foundation 100, and more importantly, greatly improves the pull-out resistance of the anchor foundation 100. At the same time, a retractable outward expansion support cage 13 is arranged at the pile foundation base 23, which enhances the shear strength of the pile foundation base 23 and improves the reliability of the anchor foundation 100.

[0043] The anchor foundation 100 of the photovoltaic bracket proposed in the present invention increases the outer diameter of the bottom by the pile base 23, thereby improving the pull-out resistance of the anchor foundation 100. Under the premise of meeting the bearing capacity requirements, the outer diameter and length of the anchor body 11 can be reduced accordingly, thereby reducing the amount of steel bars and concrete used.

[0044] The anchor foundation 100 of the photovoltaic support proposed in the present invention improves the pull-out bearing capacity of the foundation, thereby reducing the number of anchor foundations 100 and reducing the cost of engineering construction.

[0045] In an optional embodiment of the utility model, the support cage 13 includes at least two mounting members 131 and multiple support rod assemblies, the two mounting members 131 are respectively sleeved on the outside of the anchor rod body 11 and slidably cooperate with the anchor rod body 11, and the multiple support rod assemblies are arranged between the two mounting members 131 and are evenly distributed along the circumferential direction of the anchor rod body 11, each support rod assembly has a first support rod 132 and a second support rod 133, one end of the first support rod 132 and one end of the second support rod 133 are rotatably connected, and the other end of the first support rod 132 and the other end of the second support rod 133 are respectively rotatably connected to the two mounting members 131. With the above structure, during the lowering of the anchor rod 10, the support cage 13 is in a retracted state, the distance between the two mounting parts 131 is the farthest, and the first support rod 132 and the second support rod 133 are approximately in a straight line (that is, the angle between the first support rod 132 and the second support rod 133 is approximately 180 degrees), so that the anchor rod 10 can be lowered smoothly; when the anchor rod 10 is lowered to the predetermined position, the support cage 13 is released, and the two mounting parts 131 fall under the action of their own gravity, the distance between the two mounting parts 131 is shortened, the first support rod 132 and the second support rod 133 are expanded outward, and the outer diameter of the support cage 13 is increased. The expanded support cage 13 can effectively increase the shear strength of the pile foundation base 23.

[0046] In an optional example of this embodiment, the mounting member 131 is disc-shaped.

[0047] In an optional example of this embodiment, a pad 14 is provided at the end of the anchor body 11 to prevent the support cage 13 from falling off, so as to prevent the mounting member 131 from falling downward; the pad 14 can also be used for vertical positioning of the anchor 10 so that the anchor 10 can be lowered into a preset position.

[0048] In an optional example of this embodiment, a limiter 15 is fixedly provided on the anchor rod body 11, and the limiter 15 is located between the two mounting members 131. With the above structure, by limiting the distance between the limiter 15 and the pad 14, the shortest distance between the two mounting members 131 can be limited, thereby controlling the outer diameter of the support cage 13 after being unfolded.

[0049] In an optional example of this embodiment, the first support rod 132 and the second support rod 133 are rotatably connected via a connecting buckle 134 to ensure that the angle between the first support rod 132 and the second support rod 133 can be adjusted.

[0050] In an optional embodiment of the present invention, the support member 12 includes a support plate 121 and a plurality of anchor bars 122. The support plate 121 is fixed to the end of the anchor rod body 11 and is perpendicular to the anchor rod body 11. The plurality of anchor bars 122 are fixedly connected to the support plate 121 and are evenly distributed along the circumferential direction of the anchor rod body 11. With the above structure, the shear resistance of the foundation cap 21 is improved by the support member 12.

[0051] In an optional example of this embodiment, the anchor bar 122 has a bent portion that warps outward in the radial direction of the anchor rod body 11 , so as to further improve the shear resistance of the foundation cap 21 .

[0052] In an optional example of the present invention, the pile base body 22 and the pile foundation base 23 extend downward into the foundation 200 , and the foundation cap 21 protrudes upward from the foundation 200 .

[0053] In an optional example, the outer diameter of the pile foundation base 23 is greater than the outer diameter of the foundation cap 21 .

[0054] In an optional embodiment of the present invention, the grouting pile foundation 20 is a cement slurry grouting pile foundation, a cement mortar grouting pile foundation or a concrete grouting pile foundation.

[0055] In an optional embodiment of the present invention, the anchor rod 10 may be made of steel.

[0056] Please refer to Figures 1 to 4 , the specific implementation process of the anchor foundation 100 of the photovoltaic support proposed by the utility model is now described in detail in conjunction with an embodiment.

[0057] In this embodiment, the anchor foundation 100 is arranged in a pre-drilled hole 300 in the foundation 200. Specifically, according to the arrangement of the photovoltaic modules of the project, a hole is drilled at a determined support foundation point to form the borehole 300. The bottom end of the borehole 300 has an enlarged bottom plate portion 310, the size of which should be determined according to the bearing capacity calculation requirements. Generally, the diameter of the bottom plate portion 310 can be 1.5 to 3.5 times the diameter of the borehole body, and the height of the borehole 300 can be 150 mm to 400 mm.

[0058] The anchor rod 10 includes an anchor rod body 11, a support member 12 and a support cage 13. The support cage 13 has two mounting members 131 and multiple support rod assemblies. The support rod assembly has a first support rod 132 and a second support rod 133. The first support rod 132 and the second support rod 133 are connected by a connecting buckle 134. The end of the first support rod 132 and the end of the second support rod 133 are respectively connected to the two mounting members 131. The mounting member 131 is provided with circular holes with the same number as the support rod assemblies for mounting the first support rod 132 or the second support rod 133.

[0059] The upper mounting member 131 can move up and down on the anchor rod body 11, and the limiting member 15 is fixed on the anchor rod body 11 to limit the downward movement of the upper mounting member 131; another mounting member 131 is located below the limiting member 15, which can be fixed on the anchor rod body 11 or can also move up and down on the anchor rod body 11.

[0060] The bottom end of the anchor body 11 is welded with a backing plate 14 for vertical positioning of the anchor body 11. The top end of the anchor body 11 is welded with a support plate 121, and the support plate 121 is provided with a certain number of anchor bars 122 to meet the installation and force of the photovoltaic bracket.

[0061] When installing the anchor rod 10, in the initial state, the mounting member 131 located at the top is lifted so that it and the first support rod 132 are located above the stopper 15, the support cage 13 is in a tightened state, and the anchor rod 10 is installed in the borehole 300. After the anchor rod body 11 is in place, the mounting member 131 and the first support rod 132 are located at the position of the stopper 15, and the support cage 13 is in a state of being expanded in all directions within the bottom plate portion 310 of the borehole 300.

[0062] The grouting pile foundation 20 is formed by grouting into the borehole 300. The grouting material can be cement slurry, cement mortar or concrete. After the grouting body reaches the designed strength, the pile base body 22 and the pile foundation base 23 are formed. The support plate 121 and the anchor bar 122 are tied on the top of the anchor body 11, the foundation cap 21 is poured, and the concrete is cured to reach the designed strength.

[0063] At this point, the construction of the anchor foundation 100 of the photovoltaic bracket is completed, and photovoltaic brackets, photovoltaic modules and other equipment can be installed subsequently.

[0064] Compared with the traditional photovoltaic support cast-in-place pile foundation, the anchor foundation 100 of the photovoltaic support proposed in the utility model has a smaller main body diameter of about 200 mm, and uses an anchor body 11 and a support cage 13 to replace the traditional steel cage, which can effectively save engineering materials.

[0065] The bottom of the anchor foundation 100 is a pile foundation base 23 similar to a base plate. The diameter of the pile foundation base 23 is approximately 1.5 to 3.5 times that of the pile base body 22, and the height of the pile foundation base 23 is approximately 150 mm to 400 mm. The pile foundation base 23 increases the contact area between the anchor body and the rock and soil layer, which not only improves the pull-out resistance of the anchor foundation 100, but also improves the compressive bearing capacity of the anchor foundation 100.

[0066] The anchor body 11 together with the telescopic support cage 13 is a complete set of structures made in the factory. The support cage 13 configured at the bottom of the anchor body 11 can enhance the shear strength of the pile foundation base 23 and improve the overall pull-out resistance of the anchor foundation 100. The top of the anchor body 11 is connected to the support plate 121, and the support plate 121 is configured with anchor bars 122 and integrally cast with the foundation pedestal 21. After the foundation construction is completed, the photovoltaic bracket can be directly installed.

[0067] The anchor foundation 100 proposed in the utility model can be used not only for the support foundation of photovoltaic projects, but also for optimizing other foundation type projects that mainly bear pull-out force.

[0068] The detailed explanation of the above-mentioned embodiments is only intended to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions cannot be interpreted as limitations on the present invention for any reason. In particular, the various features described in different embodiments may also be arbitrarily combined with each other to form other embodiments. Unless there is a clear description to the contrary, these features should be understood to be applicable to any embodiment and are not limited to the described embodiments.

Claims

1. An anchor foundation for a photovoltaic support, characterized in that: The anchor foundation comprises: An anchor rod, comprising an anchor rod body, a support member and a support cage, wherein the support member and the support cage are respectively arranged at two ends of the anchor rod body, and the support cage can shrink and expand along the radial direction of the anchor rod body; The grouting pile foundation is cast outside the anchor rod body, and the grouting pile foundation includes a foundation cap, a pile basic body and a pile foundation base which are arranged in sequence, and the outer diameters of the foundation cap and the pile foundation base are respectively larger than the outer diameters of the pile basic body, and the foundation cap, the pile basic body and the pile foundation base are aligned and wrapped around the support member, the anchor rod body and the support cage.

2. The anchor foundation of the photovoltaic support according to claim 1, characterized in that: The support cage includes at least two mounting parts and multiple support rod assemblies, the two mounting parts are respectively sleeved outside the rod body and slidably cooperate with the rod body, the multiple support rod assemblies are arranged between the two mounting parts and are evenly distributed along the circumferential direction of the anchor rod body, each of the support rod assemblies has a first support rod and a second support rod, one end of the first support rod and one end of the second support rod are rotatably connected, and the other end of the first support rod and the other end of the second support rod are respectively rotatably connected to the two mounting parts.

3. The anchor foundation of the photovoltaic support according to claim 2, characterized in that: The end of the anchor rod body is provided with a pad to prevent the support cage from falling off.

4. The anchor foundation of the photovoltaic support according to claim 3, characterized in that: A limiting piece is fixedly arranged on the anchor rod body, and the limiting piece is located between the two mounting pieces.

5. The anchor foundation of the photovoltaic support according to claim 2, characterized in that: The first support rod and the second support rod are rotatably connected via a connecting buckle.

6. The anchor foundation of the photovoltaic support according to claim 1, characterized in that: The support member comprises a support plate and a plurality of anchor bars, wherein the support plate is fixed to the end of the anchor rod body and is perpendicular to the anchor rod body, and the plurality of anchor bars are fixedly connected to the support plate and are evenly distributed along the circumferential direction of the anchor rod body.

7. The anchor foundation of the photovoltaic support according to claim 6, characterized in that: The anchor bar has a bent portion warped outward in the radial direction of the anchor rod body.

8. The anchor foundation of the photovoltaic support according to claim 1, characterized in that: The pile base body and the pile foundation base extend downward into the foundation, and the foundation cap protrudes upward from the foundation.

9. The anchor foundation of the photovoltaic support according to claim 1 or 8, characterized in that: The outer diameter of the pile foundation base is greater than the outer diameter of the foundation cap.

10. The anchor foundation of the photovoltaic support according to claim 1, characterized in that: The grouting pile foundation is a cement slurry grouting pile foundation, a cement mortar grouting pile foundation or a concrete grouting pile foundation.

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