Anchor rod foundation for flexible photovoltaic support

Abstract

The invention belongs to the technical field of flexible photovoltaic supports, and discloses an anchor rod foundation for a flexible photovoltaic support. A rod body of the anchor rod foundation adopts a high-strength steel bar and prestressed steel strand mode, namely, a prestressed steel strand is additionally arranged on each of the two sides of the high-strength steel bar. The upper portions of the high-strength steel bars and the prestressed steel strands are exposed out of the anchor rod foundation by a certain length and fixed to the flexible photovoltaic support stay cables through the upper anchor plate and related accessories. The high-strength steel bars and the bottoms of the prestressed steel strands are fixed in the anchor rod foundation through the lower anchor plate and related accessories, and are further anchored in the anchor rod foundation through grouting bodies; the ultimate bearing capacity of the anchor rod foundation can be improved, and meanwhile the phenomenon that the anchor rod foundation rod body is prone to breakage due to the fact that high-strength steel bars are adopted is effectively avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of flexible photovoltaic supports, and in particular relates to an anchor rod foundation for a flexible photovoltaic support. Background Art

[0002] Flexible photovoltaic brackets have the technical characteristics of "high clearance and large span". They are not only suitable for areas with high requirements on bracket height and span, such as tidal flats, fish ponds, and sewage treatment plants, but also have the advantages of wide terrain adaptability and flexible and adjustable structure. They can effectively adapt to complex mountainous terrain and improve land utilization rate. They are expected to become the first choice for photovoltaic bracket systems in complex mountainous terrain in the future.

[0003] Flexible photovoltaic support foundations can be divided into middle column foundations, end column foundations and cable-stayed foundations according to their layout positions. The middle column foundations and end column foundations mainly bear vertical forces, while the cable-stayed foundations bear the vertical and horizontal forces generated by the cable-stayed cables of the support. When designing the foundation of a flexible photovoltaic support, for a cable-stayed foundation that is subject to greater forces, when calculating the horizontal bearing capacity, if the physical indicators of the foundation soil are poor, the conventional reinforced concrete cast-in-place pile foundation may require a large amount of work, which cannot guarantee the overall economic efficiency of the project and brings great difficulties to the implementation of the project.

[0004] The anchor foundation has a small rod cross-section and flexible arrangement direction. When it is used in the inclined-stayed foundation of a flexible photovoltaic bracket, the setting direction of the anchor foundation can be adjusted to keep it consistent with the direction of the inclined cable of the flexible photovoltaic bracket. This allows the foundation to only bear the pulling force in the direction of the inclined cable, reducing or even avoiding the horizontal force on the foundation, effectively avoiding the need to increase the foundation engineering volume to increase the horizontal bearing capacity of the foundation due to poor physical indicators of the foundation soil.

[0005] Anchor foundation is a foundation that mainly bears pull-out force, usually composed of anchor head, rod body and grouting body. Existing anchor foundations are mostly used for foundation pit slope support or building basement anti-floating, and there are few application cases in photovoltaic power generation projects, especially in flexible photovoltaic bracket foundations. When anchor foundation is applied to flexible photovoltaic bracket foundation, its rod body usually uses high-strength steel bars. Due to the weak shear resistance of steel bars, when there is an angle between the rod body and the flexible photovoltaic bracket, or when there are defects in the cross section of the steel bar, it is easy for the steel bar to break, which brings certain safety hazards to the overall stability of the flexible photovoltaic bracket structure.

[0006] It can be seen that when the anchor foundation is applied to the flexible photovoltaic support, due to certain defects of the above-mentioned conventional anchor foundation, the application of the anchor foundation in the flexible photovoltaic support system is limited to a certain extent. Summary of the invention

[0007] The present invention overcomes the deficiencies of the prior art and provides an anchor foundation for a flexible photovoltaic support, so as to improve the strength and stability of the anchor foundation used in a flexible photovoltaic support system.

[0008] In order to achieve the above object, the present invention is achieved through the following technical solutions: An anchor rod foundation for a flexible photovoltaic support, comprising a rod assembly and a grouting body; the rod assembly comprises a high-strength steel bar and a prestressed steel strand; a prestressed steel strand is respectively arranged on both sides of the high-strength steel bar to form a rod assembly; the high-strength steel bar and the prestressed steel strand are fixedly connected at the bottom of the rod assembly by a first anchor assembly; and a reinforcing steel bar is wound around the outside of one end of the bottom of the rod assembly; a grouting body is poured outside the rod assembly along the axial direction of the rod assembly; the diameter of the grouting body located outside the reinforcing steel bar is larger than that of the grouting body of other parts of the rod assembly The diameter of the body is formed by combining the grouting body at the reinforcing steel bar with the grouting body therein to form an enlarged head section; the grouting body of other parts of the rod body assembly and the corresponding rod body assembly form a non-enlarged head section; the front end of the rod body assembly exceeds the grouting body to form an exposed anchor head; the prestressed steel strand at the anchor head exceeds the length of the high-strength steel bar, and the prestressed steel strand at the anchor head is fixed to the inclined cable through the second anchor assembly; at the same time, the inclined cable is connected to the high-strength steel bar through a connecting piece; the end of the inclined cable away from the high-strength steel bar is connected to the end column, and the bottom of the end column is fixed to the ground through the end column foundation.

[0009] Furthermore, the first anchor assembly includes a lower anchor plate, a first anchor and a first matching nut; the bottom end of the high-strength steel bar is connected to the lower anchor plate through the first matching nut, and the first anchor is arranged on both sides of the first matching nut, and the bottom end of the prestressed steel strand is fixed to the lower anchor plate through a first anchor respectively.

[0010] Furthermore, a steel bar connection hole is provided in the middle of the lower anchor plate for connecting high-strength steel bars; and steel strand connection holes are provided on both sides of the lower anchor plate for connecting prestressed steel strands.

[0011] Furthermore, the second anchor assembly includes an upper anchor plate, a second anchor, a U-shaped bolt and a matching nut; one end of the inclined cable is fixed to the upper anchor plate by a U-shaped bolt, a matching nut and a second anchor; the prestressed steel strands on both sides are fixed to the upper anchor plate by a second anchor respectively.

[0012] Furthermore, a stay cable connection hole is arranged at the center of the upper anchor plate, and two rod body steel strand connection holes and two second U-bolt connection holes are symmetrically arranged on the upper anchor plate.

[0013] Furthermore, the connecting piece includes a sleeve and connecting ears, the connecting ears are symmetrically arranged on both sides of the sleeve, a first U-shaped bolt connecting hole is arranged on the connecting ear, and the high-strength steel bar is connected to the sleeve; the inclined cable is connected to the connecting ear through a U-shaped bolt.

[0014] The beneficial effects of the present invention compared with the prior art are as follows: The anchor foundation for the flexible photovoltaic support described in the present invention adopts a high-strength steel bar + prestressed steel strand for the rod body of the anchor foundation, that is, a prestressed steel strand is added on both sides of the high-strength steel bar. The upper part of the high-strength steel bar and the prestressed steel strand is exposed to a certain length of the anchor foundation, and is fixed to the flexible photovoltaic support inclined cable through the upper anchor plate and related accessories; the bottom of the high-strength steel bar and the prestressed steel strand is fixed in the anchor foundation through the lower anchor plate and related accessories, and is further anchored in the anchor foundation through the grouting body.

[0015] The present invention can improve the ultimate bearing capacity of the anchor foundation, and at the same time effectively avoid the phenomenon that the anchor foundation rod body is prone to breakage due to the use of high-strength steel bars, providing a new solution for the application of the anchor foundation in the flexible photovoltaic bracket foundation, thereby improving the feasibility of the application of the flexible photovoltaic bracket system in areas with poor geological conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A side cross-sectional view of the anchor foundation for the flexible photovoltaic support proposed by the present invention; Figure 2 for Figure 1 Enlarged view of point C in the middle; Figure 3 for Figure 2 Sectional view at DD in the middle; Figure 4 for Figure 2 Sectional view at EE in the middle; Figure 5 for Figure 2 The enlarged view of point A in the middle; Figure 6 for Figure 2 The enlarged view of point B in the middle; Figure 7 is a structural schematic diagram of the upper anchor plate; Figure 8 is a structural schematic diagram of the lower anchor plate; Fig. 9 is a structural schematic diagram of a connecting piece; Fig.10 for Fig. 9 Cross-sectional view at FF.

[0017] In the figure: 1. High-strength steel bars; 2. Prestressed steel strands; 3. Reinforced steel bars; 4. Grouting body; 5. Enlarged head section; 6. Non-enlarged head section; 7. Anchor head; 8. Cable-stayed cable; 9. End column; 10. End column foundation; 11. Lower anchor plate; 12. First anchor; 13. First matching nut; 14. Steel bar connection hole; 15. Steel strand connection hole; 21. Upper anchor plate; 22. U-shaped bolt; 23. Matching nut; 24. Cable connection hole; 25. Steel strand connection hole of the rod body; 26. Second U-shaped bolt connection hole; 27. Second anchor; 30. Connecting piece; 31. Sleeve; 32. Connecting ear; 33. First U-bolt connecting hole. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0019] See also Figures 1 to 10 This embodiment proposes an anchor foundation for a flexible photovoltaic support, including a rod assembly and a grouting body 4; the rod assembly includes a high-strength steel bar 1 and a prestressed steel strand 2; a prestressed steel strand 2 is arranged on both sides of the high-strength steel bar 1 to form a rod assembly. The bottom of the rod assembly is fixedly connected with the high-strength steel bar 1 and the prestressed steel strand 2 by a first anchor assembly; and a reinforcing steel bar 3 is wound around the outside of one end of the bottom of the rod assembly; a grouting body 4 is poured outside the rod assembly along the axial direction of the rod assembly; the diameter of the grouting body 4 outside the reinforcing steel bar 3 is larger than the diameter of the grouting body 4 of other parts of the rod assembly, therefore, an enlarged head section 5 is formed at the reinforcing steel bar 3 in combination with the grouting body 4 there; the grouting body 4 of other parts of the rod assembly and the corresponding rod assembly form a non-enlarged head section 6. The front end of the rod assembly extends beyond the grouting body 4 to form an exposed anchor head 7; the prestressed steel strand 2 at the anchor head 7 exceeds the length of the high-strength steel bar 1, and the prestressed steel strand 2 at the anchor head 7 is fixed to the inclined cable 8 through a second anchor assembly; at the same time, the inclined cable 8 is connected to the high-strength steel bar 1 through a connecting piece 30; the end of the inclined cable 8 away from the high-strength steel bar 1 is connected to the end column 9, and the bottom of the end column 9 is fixed to the ground through an end column foundation 10.

[0020] Specifically, the first anchor assembly includes a lower anchor plate 11, a first anchor 12 and a first matching nut 13; the bottom end of the high-strength steel bar 1 is connected to the lower anchor plate 11 through the first matching nut 13, and the first anchor 12 is arranged on both sides of the first matching nut 13, and the bottom end of the prestressed steel strand 2 is fixed to the lower anchor plate 11 through a first anchor 12. Correspondingly, a steel bar connection hole 14 is arranged in the middle of the lower anchor plate 11 for connecting the high-strength steel bar 1; and steel strand connection holes 15 are arranged on both sides of the lower anchor plate 11 for connecting the prestressed steel strand 2.

[0021] Specifically, the second anchor assembly includes an upper anchor plate 21, a second anchor 27, a U-shaped bolt 22 and a matching nut 23; a cable-stayed cable connection hole 24 is provided at the center of the upper anchor plate 21, and two rod body steel strand connection holes 25 and two second U-shaped bolt connection holes 26 are symmetrically provided on the upper anchor plate 21; one end of the cable-stayed cable 8 passes through the cable-stayed cable connection hole 24 and is fixed by a U-shaped bolt 22, a matching nut 23 and a second anchor 27; the prestressed steel strands 2 on both sides respectively pass through a rod body steel strand connection hole 25 and are respectively fixed by a second anchor 27.

[0022] Specifically, the connecting member 30 includes a sleeve 31 and a connecting ear 32. The connecting ears 32 are symmetrically arranged on both sides of the sleeve 31. The connecting ears 32 are provided with a first U-shaped bolt connecting hole 33. The high-strength steel bar 1 is connected to the sleeve 31; the inclined cable 8 is connected to the connecting ear 32 through a U-shaped bolt 22.

[0023] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. An anchor foundation for a flexible photovoltaic support, characterized in that: The invention comprises a rod assembly and a grouting body (4); the rod assembly comprises a high-strength steel bar (1) and a prestressed steel strand (2); a prestressed steel strand (2) is arranged on both sides of the high-strength steel bar (1) to form the rod assembly; the high-strength steel bar (1) and the prestressed steel strand (2) are fixedly connected at the bottom of the rod assembly by a first anchor assembly; a reinforcing steel bar (3) is wound around the outside of one end of the bottom of the rod assembly; a grouting body (4) is poured outside the rod assembly along the axial direction of the rod assembly; the diameter of the grouting body (4) outside the reinforcing steel bar (3) is larger than the diameter of the grouting body (4) in other parts of the rod assembly, and a reinforcing steel bar (3) is wound around the reinforcing steel bar (3) to form a grouting body (4); The grout (4) forms an enlarged head section (5); the grouting body (4) of the other parts of the rod assembly and the corresponding rod assembly form a non-enlarged head section (6); the front end of the rod assembly exceeds the grouting body (4) to form an exposed anchor head (7); the prestressed steel strand (2) at the anchor head (7) exceeds the length of the high-strength steel bar (1), and the prestressed steel strand (2) at the anchor head (7) is fixed to the inclined cable (8) through a second anchor assembly; at the same time, the inclined cable (8) is connected to the high-strength steel bar (1) through a connecting piece; the end of the inclined cable (8) away from the high-strength steel bar (1) is connected to the end column (9), and the bottom of the end column (9) is fixed to the ground through an end column foundation (10).

2. The anchor foundation for a flexible photovoltaic support according to claim 1, characterized in that: The first anchor assembly comprises a lower anchor plate (11), a first anchor (12) and a first matching nut (13); the bottom end of the high-strength steel bar (1) is connected to the lower anchor plate (11) via the first matching nut (13), the first anchors (12) are arranged on both sides of the first matching nut (13), and the bottom ends of the prestressed steel strands (2) are fixed to the lower anchor plate (11) via a first anchor (12) respectively.

3. The anchor foundation for a flexible photovoltaic support according to claim 2, characterized in that: A steel bar connection hole (14) is provided in the middle of the lower anchor plate (11) for connecting the high-strength steel bar (1); and steel strand connection holes (15) are provided on both sides of the lower anchor plate (11) for connecting the prestressed steel strand (2).

4. The anchor foundation for a flexible photovoltaic support according to claim 1, characterized in that: The second anchor assembly comprises an upper anchor plate (21), a second anchor (27), a U-shaped bolt (22) and a matching nut (23); one end of the inclined cable (8) is fixed to the upper anchor plate (22) via the U-shaped bolt (22), the matching nut (23) and a second anchor (27); and the prestressed steel strands (2) on both sides are fixed to the upper anchor plate (22) via a second anchor (27) respectively.

5. The anchor foundation for a flexible photovoltaic support according to claim 4, characterized in that: A stay cable connection hole (24) is provided at the center of the upper anchor plate (21), and two rod body steel strand connection holes (25) and two second U-shaped bolt connection holes (26) are also symmetrically provided on the upper anchor plate (21).

6. The anchor foundation for a flexible photovoltaic support according to claim 1, characterized in that: The connecting piece comprises a sleeve (31) and connecting ears (32). The connecting ears (32) are symmetrically arranged on both sides of the sleeve (31). The connecting ears (32) are provided with first U-shaped bolt connecting holes (33). The high-strength steel bar (1) is connected to the sleeve (31); and the inclined cable (8) is connected to the connecting ears (32) via a U-shaped bolt (22).

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