Rock foundation structure for photovoltaic support

Abstract

The present invention relates to a rock foundation structure for a photovoltaic support, and belongs to the field of rock foundation construction. The rock foundation structure for a photovoltaic support includes a tension rope, a casing with an axis extending in a vertical direction, and a pile body embedded in the rock. The pile body is provided with at least three pile bodies, and the pile body is arranged around the casing. The pile body is an anchor cable or anchor bar, and the top of the pile body is exposed from the top surface of the rock. One end of the tension rope is fixedly connected to the pile body, and the other end of the tension rope is connected to the casing; the casing is arranged on the rock or in a space of karst collapse; when the casing is located on the rock, the bottom surface of the casing contacts the top surface of the rock, and the tension rope is used to keep the axis of the casing in a vertical direction; when the casing is located in a space of karst collapse, the tension rope is used to keep the axis of the casing in a vertical direction, and the tension rope is used to withstand the force applied by the casing. In addition to being suitable for rock foundations, this product is also suitable for terrain conditions with karst collapse, and has less damage to the geomorphic environment.

Description

Technical Field

[0001] The invention relates to a rock foundation structure for a photovoltaic support and belongs to the field of rock foundation construction. Background Art

[0002] The terrain and geology of mountain photovoltaics vary greatly, as shown by: the hillside is undulating and the elevation is uneven; the thickness of the surface slope gravel soil varies from 0.1 to 1.9m, the thickness of the soil layer varies greatly, and the soil layer is largely missing. The weathered dolomite limestone in the rock layer is shallowly buried or exposed in some places, making drilling difficult. At present, the foundation of mountain photovoltaic brackets usually adopts the "microporous cast-in-place pile" foundation. The "microporous cast-in-place pile" foundation is suitable for mountain foundations with a rock layer soil burial depth greater than 0.7m.

[0003] When the weathered dolomite limestone in the rock layer is buried less than 0.7m deep or exposed, the use of "microporous cast-in-place pile" foundation will result in adverse consequences such as great difficulty in drilling and construction, great damage to the original landform, high project cost, and long construction period.

[0004] The announcement number is CN208472753U, which provides an anchor-type foundation structure for mountain photovoltaic brackets, including: anchor bars, which are threaded steel bars embedded in the underground rock layer, and the threaded part of the anchor bar end is exposed to the rock layer ground for pouring; embedded casing, which is connected to the anchor bar end through embedded steel plates, and nuts are provided upstream and downstream of the embedded steel plates, and the nuts are threadedly connected to the anchor bar end. The device is relatively simple to construct and has less damage to the original landform;

[0005] However, the embedded sleeve of the device is connected to the end of the anchor bar through the embedded steel plate, and the embedded steel plate is connected to the end of the anchor bar. Therefore, when encountering karst collapse terrain conditions, the device cannot be embedded in the anchor bar. Therefore, the device cannot adapt to landforms with karst collapse. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a rock foundation structure for a photovoltaic support which is applicable to karst collapse and has less damage to the original landform.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a rock foundation structure for a photovoltaic support, comprising a tension rope, a casing with an axis extending in a vertical direction, and a pile body embedded in the rock, at least three pile bodies are provided, and the pile body is arranged around the casing, the pile body is an anchor cable or anchor bar, and the top of the pile body is exposed from the top surface of the rock, one end of the tension rope is fixedly connected to the pile body, and the other end of the tension rope is connected to the casing;

[0008] The casing is set on the rock or located in the space of the karst collapse;

[0009] When the casing is located on the rock, the bottom surface of the casing contacts the top surface of the rock, and the tension rope is used to keep the axis of the casing in a vertical direction;

[0010] When the casing is located in the space of karst collapse, the tension rope is used to keep the axis of the casing in a vertical direction, and the tension rope is used to withstand the force applied by the casing.

[0011] Furthermore, when the casing is located on the rock, a pile body is embedded in the rock below the casing, and a connecting plate is fixedly connected to the top of the pile body. The bottom surface of the connecting plate contacts the top surface of the rock, and the bottom surface of the connecting plate is adapted to the shape of the top surface of the rock, and the casing is fixedly connected to the top surface of the connecting plate.

[0012] Furthermore, the pile bodies are distributed in the shape of regular polygons.

[0013] Furthermore, a thread is provided at the top of the pile body, and a plurality of screws are evenly spaced along the circumferential direction of the outer surface of the casing. The number of the screws matches the number of the tensioning ropes. Rope rings are fixed at both ends of the tensioning ropes. The two rope rings are respectively connected to the screws and the thread at the top of the pile body through nuts.

[0014] Furthermore, the pile body is an anchor cable, and anchor concrete is arranged on the top of the anchor cable.

[0015] Furthermore, the portion of the pile body embedded in the rock is fixedly connected to the rock via a bonding material.

[0016] Furthermore, the bonding material is grouting material or structural adhesive.

[0017] Furthermore, a plurality of barbs are arranged on the outer peripheral surface of the pile body, one end of the barb is fixedly connected to the pile body, and the other end of the barb extends obliquely in a direction toward the top surface of the rock.

[0018] Furthermore, a plurality of barbs are arranged at intervals along the circumference of the pile body, barbs located in the same circumference are grouped together, and a plurality of groups of barbs are arranged at intervals along the axial direction of the pile body.

[0019] The beneficial effects of the present invention are:

[0020] Compared with the anchor-bar foundation structure in the comparative document, this device is not only suitable for rock foundations, but also for terrain conditions with karst collapse, that is: when there is karst collapse on the surface, the pile body surrounding the casing is embedded in the rock next to the karst collapse, and the casing is kept vertical by a tensioning rope fixedly connected to the pile body. The casing is located in the space of the karst collapse, and the casing is suspended in the air. Therefore, the force borne by the casing in the vertical direction acts on the tensioning rope. Under the action of the tensioning rope, the casing remains stationary in the space of the karst collapse, thereby adapting to the topography of the karst collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is an elevation view of the present invention;

[0022] Figure 2 It is a top view of the present invention.

[0023] In the figure, the markings are: 1 is the pile body, 2 is the tension rope, 3 is the adhesive, 4 is the connecting plate, 5 is the casing, 52 is the screw rod, and 7 is the barb. DETAILED DESCRIPTION

[0024] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0025] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1 to Figure 2 As shown, the rock foundation structure for a photovoltaic support of the present invention comprises a tension rope 2, a casing 5 whose axis extends in a vertical direction, and a pile body 1 embedded in the rock, wherein at least three pile bodies 1 are provided, and the pile body 1 is arranged around the casing 5, the pile body 1 is an anchor cable or anchor bar, and the top of the pile body 1 is exposed from the top surface of the rock, one end of the tension rope 2 is fixedly connected to the pile body 1, and the other end of the tension rope 2 is connected to the casing 5;

[0027] The casing 5 is arranged on the rock or in the space of the karst collapse;

[0028] When the casing 5 is located on the rock, the bottom surface of the casing 5 contacts the top surface of the rock, and the tension rope 2 is used to keep the axis of the casing 5 in the vertical direction;

[0029] When the casing 5 is located in the space of karst collapse, the tension rope 2 is used to keep the axis of the casing 5 in a vertical direction, and the tension rope 2 is used to withstand the force applied by the casing 5 .

[0030] Specifically, the comparative document is not applicable to karst topographic conditions, such as karst collapse on the surface, or small-scale caves below; if there is karst collapse, that is, the rock surface is concave, when using the device in the comparative document, in order for the entire string to meet the horizontal height requirements of the bracket, the concrete pier formed by the steel cage at the location of the collapsed photovoltaic bracket will be cast particularly large, because the part of the pit that has collapsed must be filled up, increasing environmental damage; if there is a cavity directly below, the anchor-bar foundation structure cannot be used.

[0031] Compared with the anchor-bar foundation structure in the comparative document, the present device is not only suitable for rock foundations, but also for karst landform conditions. Like the comparative document, the casing 5 of the present device is used to connect the photovoltaic bracket, and the photovoltaic bracket and the casing 5 can be fixedly connected by bolts; when on the rock foundation, the tensioning rope 2 is stretched straight in the horizontal direction, and the casing 5 is kept vertical by the tensioning rope 2 fixedly connected to the pile body 1, and the force borne by the casing 5 in the vertical direction acts on the rock; when there is karst collapse on the surface, the pile body 1 surrounding the casing 5 is embedded in the rock next to the karst collapse, and the casing 5 is also kept vertical by the tensioning rope 2 fixedly connected to the pile body 1, and the casing 5 is located in the space of the karst collapse, the casing 5 is suspended in the air, and the tensioning rope 2 is stretched straight, so that the casing 5 remains stationary in the space of the karst collapse, and the force borne by the casing 5 in the vertical direction acts on the tensioning rope 2.

[0032] Preferably, when the casing is located on the rock, the pile body 1 is also embedded in the rock below the casing 5, and the top of the pile body 1 is fixedly connected with a connecting plate 4, the bottom surface of the connecting plate 4 is in contact with the top surface of the rock, and the bottom surface of the connecting plate 4 is adapted to the shape of the top surface of the rock, and the casing 5 is fixedly connected to the top surface of the connecting plate 4.

[0033] Specifically, a through hole is provided on the connecting plate 4, through which the pile body 1 passes, a thread is provided on the top of the pile body 1, and a nut is connected to the pile body 1, and the connecting plate 4 is pressed against the top surface of the rock by the cooperation of the nut and the thread, and the nut and the connecting plate 4 can also be welded, so that the reliability of the connection between the connecting plate 4 and the pile body 1 can be increased. The top surface of the connecting plate 4 is preferably a plane, so that it is convenient to weld the casing 5 to the connecting plate 4. This solution can increase the stability of the casing 5 and reduce the risk of the casing 5 tilting or rotating under the action of external force.

[0034] Preferably, the pile body 1 is distributed in a regular polygonal shape.

[0035] Preferably, a thread is provided at the top of the pile body 1, and a plurality of screw rods 52 are evenly spaced along the circumferential direction of the outer peripheral surface of the casing 5, the number of the screw rods 52 matches the number of the tensioning ropes 2, and rope rings are fixed at both ends of the tensioning ropes 2, and the two rope rings are respectively connected to the screw rods 52 and the thread at the top of the pile body 1 through nuts.

[0036] Specifically, the tension rope 2 is a steel strand or a steel wire rope, and the screw rod 52 on the casing 5 is arranged at different positions on the outer circumference of the casing to avoid stress concentration.

[0037] Preferably, the pile body 1 is an anchor cable, and anchor concrete is provided on the top of the anchor cable.

[0038] Preferably, the portion of the pile body 1 embedded in the rock is fixedly connected to the rock via a binder 3 .

[0039] Preferably, the adhesive 3 is a grouting material or a structural adhesive.

[0040] Specifically, compared with the anchor-type foundation structure, the foundation below the ground in this application mainly adopts prestressed anchor cables. The anchor cables themselves are combined with the rock mass by structural adhesive or grouting materials. The ground part is fastened with nuts, or sealed with anchor concrete. There is no need to cast concrete piers on the surface, which will not affect the appearance and can also reduce damage to the existing environment.

[0041] Preferably, a plurality of barbs 7 are provided on the outer peripheral surface of the pile body 1, one end of the barb 7 is fixedly connected to the pile body 1, and the other end of the barb 7 extends obliquely in a direction toward the top surface of the rock.

[0042] Specifically, the barbs 7 can increase the bonding surface between the pile body 1 and the adhesive 3 and enhance the pull-out resistance of the entire pile body 1 .

[0043] Preferably, a plurality of barbs 7 are arranged at intervals along the circumference of the pile shaft 1 , the barbs 7 located in the same circumference are a group, and a plurality of groups of barbs 7 are arranged at intervals along the axial direction of the pile shaft 1 .

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. In this article, "parallel", "vertical", etc. are not strict mathematical and / or geometrical limitations, but also include errors that can be understood by those skilled in the art and are allowed by manufacturing or use. It should also be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other.

Claims

1. A rock foundation structure for a photovoltaic support, characterized in that: The invention comprises a tension rope (2), a casing (5) whose axis extends in a vertical direction, and a pile body (1) embedded in a rock, wherein the pile body (1) is provided with at least three pieces, and the pile body (1) is arranged around the casing (5), the pile body (1) is an anchor cable or anchor bar, the top of the pile body (1) is exposed from the top surface of the rock, one end of the tension rope (2) is fixedly connected to the pile body (1), and the other end of the tension rope (2) is connected to the casing (5); When there is karst collapse on the surface, the casing (5) is located in the space of the karst collapse, the casing (5) is suspended in the air, and the tension rope (2) is stretched straight to keep the casing (5) stationary in the space of the karst collapse. The tension rope (2) is used to keep the axis of the casing (5) in a vertical direction, and the force borne by the casing (5) in the vertical direction acts on the tension rope (2).

2. The rock foundation structure for a photovoltaic support according to claim 1, characterized in that: The pile body (1) is distributed in the shape of a regular polygon.

3. The rock foundation structure for a photovoltaic support according to claim 2, characterized in that: The top of the pile body (1) is provided with a thread, and the outer peripheral surface of the sleeve (5) is evenly spaced along its circumference with a plurality of screw rods (52), the number of the screw rods (52) matches the number of the tension ropes (2), and rope rings are fixed at both ends of the tension rope (2), and the two rope rings are respectively connected to the screw rods (52) and the thread at the top of the pile body (1) through nuts.

4. The rock foundation structure for a photovoltaic support according to claim 1, characterized in that: The pile body (1) is an anchor cable, and anchoring concrete is arranged on the top of the anchor cable.

5. The rock foundation structure for a photovoltaic support according to any one of claims 1 to 4, characterized in that: The portion of the pile body (1) embedded in the rock is fixedly connected to the rock via a bonding material (3).

6. The rock foundation structure for a photovoltaic support according to claim 5, characterized in that: The bonding material (3) is a grouting material or a structural adhesive.

7. The rock foundation structure for a photovoltaic support according to claim 5, characterized in that: A plurality of barbs (7) are arranged on the outer peripheral surface of the pile body (1), one end of the barb (7) is fixedly connected to the pile body (1), and the other end of the barb (7) extends obliquely in a direction toward the top surface of the rock.

8. The rock foundation structure for a photovoltaic support according to claim 7, characterized in that: A plurality of barbs (7) are arranged at intervals along the circumference of the pile body (1); the barbs (7) located in the same circumference form a group; and a plurality of groups of barbs (7) are arranged at intervals along the axial direction of the pile body (1).

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