Flexible photovoltaic support for highway slope

Abstract

The invention discloses a flexible photovoltaic support for an expressway slope. A row of photovoltaic modules are only arranged along a long and narrow area of the expressway slope; the flexible photovoltaic support comprises two prestressed steel strands, the length directions of the two prestressed steel strands are arranged along the long and narrow area of the highway slope, and the lower surface of each photovoltaic module is connected with the two prestressed steel strands; the two ends of each prestressed steel strand are connected with end stand columns, and the lower portions of the end stand columns are connected with end piles. The middle of the prestressed steel strand is further connected with a plurality of middle stand columns, and the lower portions of the middle stand columns are connected with middle piles; the upper portion of the end stand column is further connected with a longitudinal pull rod, the side, away from the prestressed steel strand, of the longitudinal pull rod is arranged downwards in an inclined mode, and the lower portion of the longitudinal pull rod is connected with an expanded head anchor rod. According to the scheme, the occupied area is reduced, the highway slope can be well matched, and the influence of instantaneous wind load generated by traffic flow on the flexible photovoltaic support can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of support structures for photovoltaic modules, and particularly relates to a flexible photovoltaic bracket for highway slopes. Background Art

[0002] Driven by various green and low-carbon policies, some pilot projects of "photovoltaic + highway" have emerged in the transportation field. How to reasonably arrange photovoltaic modules in combination with the characteristics of highway slopes is a key problem to be solved in structural design. Currently, the installation of photovoltaic modules on highway slopes mainly adopts the form of fixed brackets, that is, the traditional fixed photovoltaic bracket structure. These fixed photovoltaic brackets arranged on highway slopes transfer the load to the foundation by setting reinforced concrete pier foundations or micropile foundations on the highway slopes. The advantages of the traditional fixed photovoltaic bracket foundation scheme are that the design and construction technologies are simple, and these technologies are familiar to most technicians in the industry. However, the disadvantages are that the number of foundations is large and the construction workload is huge. The traditional flexible bracket has the advantages of large span and few foundations. However, due to the relatively high installation height of the components and the relatively large number of component rows of the traditional flexible bracket, it is not applicable to the narrow areas such as highway slopes. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide a flexible photovoltaic bracket for highway slopes, to solve the problems such as large construction volume or inapplicability to highway slopes in the existing solutions, to better fit the narrow areas such as highway slopes, and to give full play to the economy of the flexible bracket and the foundation.

[0004] According to the technical solution of the present invention, a flexible photovoltaic bracket for highway slopes is provided. The highway slope is a narrow area, and only one row of photovoltaic modules is arranged along the narrow area of the highway slope. The photovoltaic modules are arranged on the flexible photovoltaic bracket. The flexible photovoltaic bracket includes two prestressed steel strands. The length directions of the two prestressed steel strands are arranged along the narrow area of the highway slope. The lower part of each photovoltaic module is connected to the two prestressed steel strands. Both ends of each prestressed steel strand are connected with end columns. The lower part of the end column is connected with an end pile, and the lower part of the end pile is buried below the ground surface of the highway slope. A plurality of middle columns are also connected in the middle of the prestressed steel strands. The lower part of the middle column is connected with a middle pile, and the lower part of the middle pile is buried below the ground surface of the highway slope. A longitudinal tie rod is also connected to the upper part of the end column. The longitudinal tie rod is arranged obliquely downward on the side far from the prestressed steel strand. The lower part of the longitudinal tie rod is connected with an enlarged head anchor rod, and the lower part of the enlarged head anchor rod is buried below the ground surface of the highway slope.

[0005] Furthermore, the end columns of the two prestressed steel strands correspond to each other, and an end cross bar is connected between the two corresponding end columns.

[0006] Further, the middle columns of the two prestressed steel strands correspond to each other, and a middle cross bar is connected between the two corresponding middle columns.

[0007] Further, the two prestressed steel strands are arranged in parallel; among the two prestressed steel strands, one is located obliquely below the other; the plane where the photovoltaic modules are located is inclined to the horizontal line.

[0008] Further, among the two longitudinal tie rods at the same end in the length direction of the two prestressed steel strands, the lengths of the two longitudinal tie rods are different, and one of the two longitudinal tie rods is located obliquely above or obliquely below the other.

[0009] Further, in a flexible photovoltaic support, the numbers of the end columns, end piles, longitudinal tie rods, and enlarged head anchor bolts are all four, and the numbers of the middle columns and middle piles are all even numbers greater than or equal to four.

[0010] Further, the upper end of the end column has a through hole, and the end of the prestressed steel strand passes through the through hole at the upper end of the end column and is fixed by a steel strand anchor.

[0011] Further, the distance between the lowest point of the photovoltaic module and the ground of the highway slope is 500mm ± 50mm.

[0012] Further, both of the two prestressed steel strands are prestressed steel strands with a diameter of φ15.2mm.

[0013] Further, the longitudinal tie rod is a prestressed steel strand with a diameter of φ17.8mm.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are as follows: The flexible photovoltaic support for the highway slope of the present invention is a relatively suitable type of photovoltaic support proposed for the highway slope situation. Only one row of photovoltaic modules is arranged in the narrow area, so that it can be applied to most highway slopes; through structural construction measures, the height of the flexible photovoltaic support is reduced, the number of rows of flexible photovoltaic support components is reduced, and the enlarged head anchor bolts are used to transfer the horizontal force of the flexible photovoltaic support to the foundation, reducing the floor area of the end foundation (end pile). The improved flexible photovoltaic support and foundation scheme can better fit the narrow area such as the highway slope and can reduce the influence of the instantaneous wind load generated by the vehicle flow on the flexible photovoltaic support; the traditional flexible photovoltaic support mainly uses the form of cast-in-place piles or independent foundations to transfer the horizontal force of the prestressed steel strand to the foundation. The present invention uses enlarged head anchor bolts to transfer the horizontal force of the prestressed steel strand to the foundation, eliminating the need for concrete formwork and steel bar binding, and shortening the construction time of the flexible photovoltaic support foundation. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the planar structure of the flexible photovoltaic support provided by the present invention when viewed from above.

[0016] Figure 2 It is a schematic elevation view of the flexible photovoltaic support provided by the present invention.

[0017] Description of reference numerals in the accompanying drawings: 1. Photovoltaic modules; 2. Prestressed steel strands; 3. End columns; 4. End piles; 5. Highway slope ground; 6. Center columns; 7. Center piles; 8. Longitudinal tie rods; 9. Enlarged head anchor rods; 10. End cross bars; 11. Center cross bars; 12. Steel strand anchors. DETAILED DESCRIPTION

[0018] The present invention provides a flexible photovoltaic bracket for highway slopes, which solves the problems of large construction volume or unsuitability for highway slopes in existing solutions. More specifically, the purpose of the present invention is to find a flexible photovoltaic bracket structural solution that can be applied to highway slopes. The solution of the present invention reduces the height of the flexible bracket and the number of rows of flexible photovoltaic bracket components through structural construction measures, and uses enlarged head anchor rods to transfer the horizontal force of the flexible bracket and foundation to the foundation, reducing the footprint of the end foundation. The modified flexible photovoltaic bracket and foundation solution can better fit the narrow and long areas such as highway slopes, and can reduce the impact of instantaneous wind loads generated by traffic on the flexible photovoltaic bracket.

[0019] See also Figure 1 , Figure 2 The flexible photovoltaic bracket for highway slopes of the present invention is mainly aimed at proposing a suitable photovoltaic bracket type for highway slopes. Highway slopes are narrow and long areas and will be affected by the airflow of high-speed cars. The existing photovoltaic bracket solutions have the problems of large construction volume or large land occupation, and cannot be well applied to highway slopes. For this special application scenario, the solution of the present invention is to use a new type of flexible photovoltaic bracket and only arrange a row of photovoltaic modules 1 along the narrow and long area of the highway slope, so that it can be applied to most highway slopes.

[0020] More specifically, the photovoltaic module 1 is arranged on a flexible photovoltaic support, and the flexible photovoltaic support includes two prestressed steel strands 2, the length direction of the two prestressed steel strands 2 is arranged along the narrow and long area of the highway slope, and each photovoltaic module 1 is connected to the two prestressed steel strands 2 below; multiple photovoltaic modules 1 are arranged side by side along the prestressed steel strands 2, that is, a row of photovoltaic modules 1 is formed along the highway slope. The photovoltaic module 1 is connected and fixed to the prestressed steel strands 2 through a connecting device.

[0021] Both ends of each prestressed steel strand 2 are connected with end columns 3. The lower part of the end column 3 is connected with an end pile 4, and the lower part of the end pile 4 is buried below the ground surface 5 of the highway slope. Several middle columns 6 are also connected to the middle of the prestressed steel strand 2. The lower part of the middle column 6 is connected with a middle pile 7, and the lower part of the middle pile 7 is buried below the ground surface 5 of the highway slope. A longitudinal tie rod 8 is also connected to the upper part of the end column 3. The longitudinal tie rod 8 is arranged obliquely downward on the side away from the prestressed steel strand 2. The lower part of the longitudinal tie rod 8 is connected with an expanded head anchor rod 9, and the lower part of the expanded head anchor rod 9 is buried below the ground surface 5 of the highway slope.

[0022] More specifically, two prestressed steel strands 2 are arranged in parallel. And among the two prestressed steel strands 2, one of them is located obliquely below the other; thus, the plane where the photovoltaic module 1 is located is inclined to the horizontal line. During the period with sufficient sunlight, the angle of the photovoltaic module 1 facing the sun is appropriate, which helps to increase the power generation of the photovoltaic power generation. In the embodiment, both prestressed steel strands 2 are prestressed steel strands with a diameter of φ15.2mm (i.e., the nominal diameter is 15.2mm).

[0023] The upper end of the end column 3 has a through hole. The end of the prestressed steel strand 2 passes through the through hole at the upper end of the end column 3 and is fixed by a steel strand anchor 12. Both the end column 3 and the end pile 4 are arranged vertically. The lower part of the end pile 4 has a sufficient burial depth to ensure the bearing strength. The end columns 3 of the two prestressed steel strands 2 correspond to each other. For example, Figure 2 as shown, when observed from the perspective of facing each other from the side, the positions of the end columns 3 coincide. Furthermore, an end cross bar 10 is connected between the two corresponding end columns 3. For example, the upper ends of the two end columns 3 are connected by the end cross bar 10.

[0024] The forms of the middle column 6 and the middle pile 7 are the same as or similar to those of the end column 3 and the end pile 4, for example. Both the middle column 6 and the middle pile 7 are arranged vertically. The lower part of the middle pile 7 has a sufficient burial depth to ensure the bearing strength. The middle columns 6 of the two prestressed steel strands 2 correspond to each other. A middle cross bar 11 is connected between the two corresponding middle columns 6. For example, the upper ends of the two middle columns 6 are connected by the middle cross bar 11. It is preferred to have the end cross bar 10 and the middle cross bar 11 to ensure the integrity of the entire flexible support system.

[0025] The longitudinal tie rod 8 and the expanded head anchor rod 9 are arranged obliquely with respect to the ground surface 5 of the highway slope, so that the whole forms, for example Figure 2The trapezoidal structure shown. The "longitudinal" direction of the longitudinal tie rod 8 is relative to the two prestressed steel strands 2 that are substantially parallel, corresponding to the length direction of the prestressed steel strands 2, and is mainly used for force transmission in this direction. The longitudinal tie rod 8 is a prestressed steel strand with a diameter of φ17.8 mm (i.e., a nominal diameter of 17.8 mm). The enlarged head anchor rod 9 mainly includes an anchor rod and an enlarged head section. The enlarged head section is located at the lower part. Both the anchor rod and the enlarged head section are buried in the ground surface 5 of the highway slope. The anchor rod extends out of the ground and is connected to the longitudinal tie rod 8.

[0026] Furthermore, in a flexible photovoltaic support, the number of end columns 3, end piles 4, longitudinal tie rods 8, and enlarged head anchor rods 9 is four (two groups) each, and the number of middle columns 6 and middle piles 7 is an even number greater than four (multiple evenly distributed groups). Among the two longitudinal tie rods 8 at the same end in the length direction of the two prestressed steel strands 2, the lengths of the two longitudinal tie rods 8 can be different, and one of the two longitudinal tie rods 8 is located diagonally above or below the other, so as to achieve various tilting angles of the component layout; and correspondingly, the embedment depths of the enlarged head sections of the two enlarged head anchor rods 9 at the same end also vary; thus better adapting to the highway slope conditions.

[0027] The main concept and principle of the present invention are as follows. The flexible photovoltaic support located on the highway slope should be able to withstand the actions of wind load, snow load, gravity load, seismic load, and the combined action of the above loads. When the photovoltaic modules are subjected to the actions of wind load, snow load, and gravity load, etc., these loads will be directly transmitted to the two prestressed steel strands that support the photovoltaic modules; the two prestressed steel strands are fixed to the end columns and are vertically supported by the middle columns; the middle columns transfer a part of the vertical force borne by the prestressed steel strands to the foundation through the middle piles; the end columns transfer a part of the vertical force borne by the prestressed steel strands to the foundation through the end piles; and through the longitudinal tie rods and the enlarged head anchor rods, the longitudinal horizontal force borne by the prestressed steel strands is transferred to the foundation.

[0028] The economy of flexible photovoltaic supports and their foundations is often related to the number of spans of the supports, that is, the more spans the supports have, the better the economy. The "strip-shaped" structural characteristics of highway slopes fit the structural form of flexible supports, enabling the full play of the economy of flexible supports and their foundations. Furthermore, in order to apply traditional flexible photovoltaic supports to highway slopes, a flexible photovoltaic support solution proposed by the present invention can achieve a distance of about 500 mm (such as 500 mm ± 50 mm) between the lowest point of the photovoltaic module 1 and the ground 5 of the highway slope. By reducing the height of the module layout, the impact of instantaneous wind loads of vehicle flows on the photovoltaic modules and supports can be reduced. At the same time, in order to adapt to such long and narrow areas as highway slopes, only one row of photovoltaic modules is arranged in this solution, so that it can be applied to most highway slopes. In addition, the flexible support of this solution transfers the horizontal force to the foundation through an anchor rod with an enlarged head, which can ensure safety and reduce the floor area.

[0029] In summary, the flexible photovoltaic support for highway slopes of the present invention is a relatively suitable type of photovoltaic support proposed for the situation of highway slopes. Only one row of photovoltaic modules is arranged in the long and narrow area, so that it can be applied to most highway slopes. Through structural construction measures, the height of the flexible photovoltaic support is reduced, the number of rows of the flexible photovoltaic support module layout is reduced, and an anchor rod with an enlarged head is used to transfer the horizontal force of the flexible photovoltaic support to the foundation, reducing the floor area of the end foundation (i.e., end pile). The improved flexible photovoltaic support and foundation solution can better fit such long and narrow areas as highway slopes and reduce the impact of instantaneous wind loads generated by vehicle flows on the flexible photovoltaic support. Traditional flexible photovoltaic supports mainly use bored piles or independent foundations to transfer the horizontal force of prestressed steel strands to the foundation. The present invention uses an anchor rod with an enlarged head to transfer the horizontal force of prestressed steel strands to the foundation, eliminating the need for concrete formwork and steel bar binding and shortening the construction time of the flexible photovoltaic support foundation.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention; for the convenience of description, only parts related to the relevant invention are shown in the drawings. Without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other; modifying the technical solutions recorded in the foregoing embodiments or equivalently replacing some of the technical features does not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible photovoltaic support for highway slopes, characterized in that, The highway slope is a narrow area, and only a row of photovoltaic modules (1) is arranged along the narrow area of the highway slope. The photovoltaic modules (1) are arranged on flexible photovoltaic brackets. The flexible photovoltaic bracket includes two prestressed steel strands (2). The length directions of the two prestressed steel strands (2) are arranged along the narrow area of the highway slope. Each photovoltaic module (1) is connected to the two prestressed steel strands (2) below. Both ends of each prestressed steel strand (2) are connected to end columns (3). The lower part of the end column (3) is connected to an end pile (4). The lower part of the end pile (4) is buried below the highway slope ground (5). A number of middle columns (6) are also connected to the middle of the prestressed steel strand (2). The lower part of the middle column (6) is connected to a middle pile (7). The lower part of the middle pile (7) is buried below the highway slope ground (5). A longitudinal tie rod (8) is also connected to the upper part of the end column (3). The longitudinal tie rod (8) is arranged obliquely downward on the side away from the prestressed steel strand (2). The lower part of the longitudinal tie rod (8) is connected to an enlarged head anchor rod (9). The lower part of the enlarged head anchor rod (9) is buried below the highway slope ground (5).

2. The flexible photovoltaic support for highway slopes according to claim 1, characterized in that, The end columns (3) of the two prestressed steel strands (2) correspond to each other, and an end cross bar (10) is connected between the two corresponding end columns (3).

3. The flexible photovoltaic support for highway slopes according to claim 2, characterized in that, The middle columns (6) of the two prestressed steel strands (2) correspond to each other, and a middle cross bar (11) is connected between the two corresponding middle columns (6).

4. The flexible photovoltaic support for highway slopes according to claim 1, wherein, The two prestressed steel strands (2) are arranged in parallel; among the two prestressed steel strands (2), one is located obliquely below the other; the plane where the photovoltaic module (1) is located is inclined to the horizontal line.

5. The flexible photovoltaic support for highway slopes according to claim 4, characterized in that, Among the two longitudinal tie rods (8) at the same end in the length direction of the two prestressed steel strands (2), the lengths of the two longitudinal tie rods (8) are different, and one of the two longitudinal tie rods (8) is located obliquely above or obliquely below the other.

6. The flexible photovoltaic support for highway slopes according to any one of claims 1-5, characterized in that In a flexible photovoltaic bracket, the numbers of the end columns (3), end piles (4), longitudinal tie rods (8), and enlarged head anchor rods (9) are all four, and the numbers of the middle columns (6) and middle piles (7) are all even numbers of four or more.

7. The flexible photovoltaic support for highway slopes according to any one of claims 1-5, characterized in that The upper end of the end column (3) has a through hole, and the end of the prestressed steel strand (2) passes through the through hole at the upper end of the end column (3) and is fixed by a steel strand anchor (12).

8. The flexible photovoltaic support for highway slopes according to any one of claims 1-5, characterized in that, The distance between the lowest point of the photovoltaic module (1) and the highway slope ground (5) is 500mm ± 50mm.

9. The flexible photovoltaic support for highway slopes according to any one of claims 1-5, characterized in that, Both of the two prestressed steel strands (2) are prestressed steel strands with a diameter of φ15.2mm.

10. The flexible photovoltaic support for highway slopes according to any one of claims 1-5, characterized in that The longitudinal tie rod (8) is a prestressed steel strand with a diameter of φ17.8mm.

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