A large-span photovoltaic support arranged on a steep hillside

Abstract

The application discloses a large-span photovoltaic support arranged on a steep hillside, and solves the problem of how to arrange a large-span photovoltaic support on a stone hillside; a cast-in-situ concrete long strip pile cap (5) is cast on a gravel backfill layer (2) at the bottom of the hillside, a bottom support column (6) is arranged on the concrete long strip pile cap (5), a middle support column (7) is arranged on a large isolated rock (3) arranged in the middle of the stone hillside (1), a top support column (9) is arranged on the cast-in-situ concrete long strip pile cap (5), and a large-span support (10) is arranged between the bottom support column (6), the middle support column (7) and the top support column (9); the stable arrangement of the large-span support is realized, and the operation safety of photovoltaic modules is ensured.

Description

Technical Field

[0001] This invention relates to a photovoltaic support structure, and more particularly to a large-span photovoltaic support structure for installation on steep mountain slopes. Background Technology

[0002] With the rapid development of photovoltaic power generation, the construction of large-scale photovoltaic power stations is in full swing in mountainous areas. However, due to restrictions on protecting arable land and controlling land acquisition costs, many photovoltaic power generation companies are turning their attention to barren hillsides in order to make full use of limited mountain resources and keep construction costs low. Therefore, the northern mountainous areas with poor vegetation have become the preferred sites for deploying large-area photovoltaic power stations. Generally, supports with a longitudinal span of more than 5 meters are called large-span supports. These mountainous areas have undulating terrain with large gullies, irregular topography, and chaotic topography. These areas are characterized by barren, rocky slopes that are unsuitable for cultivation and have low tree survival rates; they also feature small diurnal temperature variations, good air quality, and ample sunshine; some photovoltaic (PV) power generation components need to be installed on steep slopes in mountain valleys, where winding mountain roads prevent drilling machinery from accessing and constructing, thus limiting the installation area of ​​PV components and failing to meet the project's required installation capacity. In addition, there are areas in the valleys backfilled with industrial waste such as gravel. Designing a PV support structure with a large coverage area suitable for installation on steep slopes, while overcoming the geological instability of the backfilled areas, has become an urgent problem to be solved on site. Summary of the Invention

[0003] This invention provides a large-span photovoltaic support structure for installation on steep hillsides, solving the technical problem of how to install large-span photovoltaic support structures on rocky hillsides.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A large-span photovoltaic support structure for installation on a steep hillside includes a steep rocky hillside, with large boulders in the middle of the hillside, exposed limestone at the top of the hillside, a gravel backfill layer at the bottom of the hillside, bored piles at the top of the hillside, a cast-in-place concrete long strip foundation on the gravel backfill layer at the bottom of the hillside, a bottom support column on the concrete long strip foundation, a middle support column on the large boulders in the middle of the hillside, a top support column on the bored pile foundation, and a large-span support structure between the bottom support column, the middle support column, and the top support column.

[0006] The large-span support structure consists of 4-6 trusses. Each truss is a rectangular frame composed of a lower chord, upper chord, vertical struts, and diagonal struts. Adjacent rectangular frames are connected by X-shaped horizontal connecting rods. Purlin connecting bolts are fixedly connected to the top surface of the rectangular frame. C-shaped purlins are connected to the purlin connecting bolts, and photovoltaic modules are connected to the C-shaped purlins.

[0007] The concrete long strip foundation is composed of a front bored pile, a first crushed stone cushion layer, and a cast-in-place concrete long strip slab. The cast-in-place concrete long strip slab is cast on the first crushed stone cushion layer. The upper end of the front bored pile passes through the first crushed stone cushion layer and is set in the cast-in-place concrete long strip slab. A pre-embedded steel plate for fixing the bottom support column is pre-embedded on the rear top surface of the cast-in-place concrete long strip slab.

[0008] A steel plate base is welded to the bottom of the central support column. The steel plate base is fixed to the top surface of the large boulder by expansion bolts. A lower clamping plate is fixed to the top of the central support column. A lower chord is installed on the lower clamping plate. An upper clamping plate is installed on the lower chord. Tie bolts are installed between the lower clamping plate and the upper clamping plate.

[0009] The bored pile foundation consists of a first bored pile, a second bored pile, and a third bored pile. The three bored piles are drilled in a triangular arrangement on the exposed limestone at the top of the slope. A second crushed stone cushion layer is set on the exposed limestone. A concrete cap for the top of the slope is cast in place on the second crushed stone cushion layer. A top steel plate is pre-embedded at the top of the concrete cap for the top of the slope. The top support column is fixed on the top steel plate. The tops of the first bored pile, the second bored pile, and the third bored pile are set in the concrete cap for the top of the slope. Anchor bars are connected under the top steel plate.

[0010] A method for deploying a large-span photovoltaic support system on a steep hillside, characterized by the following steps:

[0011] Step 1: Drill the pile holes for the front bored piles in the crushed stone backfill layer at the bottom of the slope and complete the pouring of the front bored piles; set up the first crushed stone cushion layer along the slope direction, and build the pouring formwork for the cast-in-place concrete strip slab on the first crushed stone cushion layer, construct the steel reinforcement system in the cast-in-place concrete strip slab, and pour the cast-in-place concrete strip slab. At the same time, embed the pre-embedded steel plate to fix the bottom support column, and set the bottom connector on the pre-embedded steel plate; and set the front bored piles in front of the cast-in-place concrete strip slab, and set the pre-embedded steel plate in the rear of the cast-in-place concrete strip slab, so that the length direction of the cast-in-place concrete strip slab is set along the slope direction.

[0012] The second step involves drilling the first, second, and third bored pile holes on the exposed limestone at the top of the slope behind the cast-in-place concrete long strip slab, so that the line connecting the three pile holes forms a triangle shape. The first, second, and third bored piles are then poured. A second crushed stone cushion layer is then constructed, and a concrete foundation for the top of the slope is cast in place on the second crushed stone cushion layer. A top steel plate is pre-embedded at the top of the concrete foundation, and a top connector is installed on the top steel plate.

[0013] The third step is to connect the lower end of a truss to the pre-embedded steel plate through the bottom support column, and connect the upper end of a truss to the top steel plate through the top support column, so that a truss can be erected on the hillside.

[0014] Fourth step: Install an upper clamping plate and a lower clamping plate on the lower chord in the middle of a truss, and install tie bolts between the lower clamping plate and the upper clamping plate; weld the middle support column to the bottom surface of the lower clamping plate, and weld a steel plate base to the lower end of the middle support column; fix the steel plate base to the top surface of the large boulder on the hillside directly below with expansion bolts; thus completing the installation of the truss.

[0015] Step 5: Repeat steps 1 to 4 to complete the installation of each truss that is set up in parallel.

[0016] Step 6: Install X-shaped inclined anchor cables between two adjacent trusses. The ends of the inclined anchor cables are connected to the trusses by L-shaped angle steel, which is hinged to the lower chord of the truss by a pin.

[0017] Step 7: Install inclined tie anchors between each pile foundation and the top of the truss diagonally opposite the foundation. Install turnbuckles in the inclined tie anchors. Through the X-shaped arrangement of tie anchors and inclined tie anchors, the entire wide support forms a stable box frame structure.

[0018] Step 8: Fix the purlin connecting bolts to the top surface of the rectangular frame, connect the C-shaped purlins to the purlin connecting bolts, and install the photovoltaic modules on the C-shaped purlins.

[0019] In order to make more effective use of mountainous space, this invention constructs a support frame for large-span photovoltaic modules by arranging multiple trusses in parallel. It also cleverly makes full use of the mountainous geological conditions to construct pile foundations for different supports, thereby achieving stable deployment of large-span supports, providing wind uplift resistance, and ensuring the safe operation of photovoltaic modules. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the structure of the present invention;

[0021] Figure 2 is a schematic diagram of the large-span support 10 of the present invention in a side view.

[0022] Figure 3 is a structural schematic diagram of the large-span support 10 of the present invention from a bottom view.

[0023] Figure 4 is a structural schematic diagram of the concrete elongated foundation 5 of the present invention;

[0024] Figure 5 is a schematic diagram of the pre-embedded steel plate on the concrete elongated foundation 5 of the present invention;

[0025] Figure 6 This is a schematic diagram of the central support column of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the bored pile foundation 8 at the top of the slope of the present invention;

[0027] Figure 8 yes Figure 7 Sectional view along axis AA;

[0028] Figure 9 yes Figure 7 BB-direction sectional view. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings:

[0030] A large-span photovoltaic support structure for installation on a steep hillside includes a steep rocky hillside 1, a large boulder 3 in the middle of the hillside 1, exposed limestone 4 at the top of the slope, a gravel backfill layer 2 at the bottom of the slope, a bored pile foundation 8 at the top of the slope, a cast-in-place concrete long strip foundation 5 on the gravel backfill layer 2 at the bottom of the slope, a bottom support column 6 on the concrete long strip foundation 5, a middle support column 7 on the large boulder 3 in the middle of the hillside 1, a top support column 9 on the bored pile foundation 8, and a large-span support structure 10 between the bottom support column 6, the middle support column 7, and the top support column 9; the large-span support structure 10 is arranged along the hillside and is approximately 10 meters long.

[0031] The large-span support 10 consists of 3-6 trusses. Each truss is a rectangular frame composed of a lower chord 101, an upper chord 102, a vertical strut 103, and a diagonal strut 104. The members are square steel members. An X-shaped horizontal connecting rod 107 connects adjacent rectangular frames. The entire support is relatively heavy and is arranged vertically on a sunny hillside. Purlin connecting bolts are fixedly connected to the top surface of the rectangular frame. C-shaped purlins 105 are connected to the purlin connecting bolts, and photovoltaic modules 106 are connected to the C-shaped purlins 105. Each truss is supported on pile foundations spaced apart along the hillside. A concrete strip foundation 5 is set at the bottom of each truss, and a bored pile foundation 8 is set at the top of each truss. The support method in the middle can be determined according to the geological conditions.

[0032] The concrete long strip foundation 5 is composed of a front bored pile 12, a first crushed stone cushion layer 11, and a cast-in-place concrete long strip slab 13. The cast-in-place concrete long strip slab 13 is cast on the first crushed stone cushion layer 11. The upper end of the front bored pile 12 passes through the first crushed stone cushion layer 11 and is set in the cast-in-place concrete long strip slab 13. A pre-embedded steel plate 14 for fixing the bottom support column 6 is pre-embedded on the rear top surface of the cast-in-place concrete long strip slab 13. The lower end of the bottom support column 6 is welded to the pre-embedded steel plate 14. The long side of the concrete long strip foundation 5 is arranged along the slope. The friction between the bottom of the cast-in-place concrete long strip slab 13 and the slope surface is used to support and resist the downward force of the entire support. The front bored pile 12 acts as a rivet for the cast-in-place concrete long strip slab 13.

[0033] A steel plate base 15 is welded to the bottom of the central support column 7. The steel plate base 15 is fixed to the top surface of the large boulder 3 by expansion bolts 16. The large boulder 3 provides stable support for the central support column, simplifies the construction process, and saves on the investment of support pile foundation materials. A lower clamping plate 17 is fixedly connected to the top of the central support column 7. A lower chord 101 is set on the lower clamping plate 17, and an upper clamping plate 18 is set on the lower chord 101. A tie bolt 19 is set between the lower clamping plate 17 and the upper clamping plate 18. The central support column is fixedly connected to the entire support by the clamping of the two clamping plates.

[0034] The bored pile foundation 8 consists of a first bored pile 801, a second bored pile 802, and a third bored pile 803. The three bored piles are drilled in a triangular arrangement on the exposed limestone 4 at the top of the slope. A second crushed stone cushion layer 804 is set on the exposed limestone 4, and a slope top concrete cap 805 is cast-in-place on the second crushed stone cushion layer 804. A top steel plate 806 is pre-embedded at the top of the slope top concrete cap 805, and a top support column 9 is fixed to the top steel plate 806. The tops of the first bored pile 801, the second bored pile 802, and the third bored pile 803 are set in the slope top concrete cap 805, and anchor bars are connected below the top steel plate 806. The three bored piles arranged in a triangle on the exposed limestone 4 at the top of the slope have an uplift resistance function. Due to the strong mountain winds in the valley, and because the photovoltaic modules at the top of the large-span photovoltaic support form a large top plate, the large top plate will generate an upward buoyancy like a kite when the mountain wind blows upward. The bottom of the entire photovoltaic support can generate a downward pull by increasing the cast-in-place concrete strip 13. However, if the top of the entire photovoltaic support is only supported by a single bored pile, it will not be able to resist the upward buoyancy of the mountain wind, since the diameter of the bored pile is generally 150 cm. This invention uses three bored piles arranged in a triangle to form a pull on the concrete foundation 805 at the top of the slope, thus achieving the resistance to the upward wind force.

[0035] A method for deploying a large-span photovoltaic support system on a steep hillside, characterized by the following steps:

[0036] Step 1: Drill the pile holes for the front bored piles 12 on the crushed stone backfill layer 2 at the bottom of the slope, and complete the pouring of the front bored piles 12; set the first crushed stone cushion layer 11 along the slope direction, and build the pouring template for the cast-in-place concrete long strip slab 13 on the first crushed stone cushion layer 11, construct the steel reinforcement system in the cast-in-place concrete long strip slab 13, and pour the cast-in-place concrete long strip slab 13. At the same time, embed the embedded steel plate 14 to fix the bottom end support column 6, and set the bottom connector on the embedded steel plate 14; and set the front bored piles 12 at the front of the cast-in-place concrete long strip slab 13, and the embedded steel plate 14 at the rear of the cast-in-place concrete long strip slab 13, so that the length direction of the cast-in-place concrete long strip slab 13 is set along the slope direction.

[0037] The second step involves drilling the first bored pile 801, the second bored pile 802, and the third bored pile 803 on the exposed limestone 4 at the top of the slope behind the cast-in-place concrete long strip slab 13, so that the line connecting the three pile holes forms a triangle shape. The first bored pile 801, the second bored pile 802, and the third bored pile 803 are then poured. A second crushed stone cushion layer 804 is then constructed, and a concrete foundation 805 at the top of the slope is cast in place on the second crushed stone cushion layer 804. A top steel plate 806 is pre-embedded at the top of the concrete foundation 805 at the top of the slope, and a top connector is installed on the top steel plate 806.

[0038] The third step is to connect the lower end of a truss to the pre-embedded steel plate 14 through the bottom support column 6, and connect the upper end of a truss to the top steel plate 806 through the top support column 9, so that a truss can be erected on the hillside.

[0039] Fourth step: Install an upper clamping plate 18 and a lower clamping plate 17 on the lower chord 101 in the middle of a truss, and install tie bolts 19 between the lower clamping plate 17 and the upper clamping plate 18; weld the middle support column 7 to the bottom surface of the lower clamping plate 17, and weld a steel plate base 15 to the lower end of the middle support column 7; fix the steel plate base 15 to the top surface of the large boulder 3 on the hillside directly below using expansion bolts 16; thus completing the installation of the truss.

[0040] Step 5: Repeat steps 1 to 4 to complete the installation of each truss that is set up in parallel.

[0041] After the trusses on the hillside are installed, they can be connected together laterally using transverse connecting angle steel.

[0042] Step 6: Install X-shaped inclined anchor cables between two adjacent trusses. The ends of the inclined anchor cables are connected to the trusses by L-shaped angle steel. The L-shaped angle steel is hinged to the lower chord 101 of the truss by a pin. Anchor rods are installed on the vertical plate of the L-shaped angle steel through through holes. This movable hinge method facilitates the tension adjustment of the anchor rods.

[0043] Step 7: Install inclined tie anchors between each pile foundation and the top of the truss diagonally opposite the foundation. Install turnbuckles in the inclined tie anchors and adjust the tension of the anchors by rotating the turnbuckles. The X-shaped arrangement of tie anchors and inclined tie anchors makes the entire wide support form a stable box frame structure, providing conditions for the subsequent installation of photovoltaic modules.

[0044] Step 8: Fix the purlin connecting bolts to the top surface of the rectangular frame, connect the C-shaped purlins 105 to the purlin connecting bolts, and install the photovoltaic modules 106 on the C-shaped purlins 105.

Claims

1. A large-span photovoltaic support structure installed on a steep hillside, comprising a steep rocky hillside (1), a large boulder (3) in the middle of the rocky hillside (1), exposed limestone (4) at the top of the slope, and a gravel backfill layer (2) at the bottom of the slope, characterized in that, A bored pile foundation (8) is set at the top of the slope, a concrete long strip foundation (5) is cast on the crushed stone backfill layer (2) at the bottom of the slope, a bottom support column (6) is set on the concrete long strip foundation (5), a middle support column (7) is set on the large isolated rock (3) in the middle of the rocky hillside (1), a top support column (9) is set on the bored pile foundation (8), and a large span bracket (10) is set between the bottom support column (6), the middle support column (7) and the top support column (9).

2. The large-span photovoltaic support structure for installation on steep hillsides according to claim 1, characterized in that, The large-span support (10) is composed of 4-6 trusses. Each truss is a rectangular frame composed of a lower chord (101), an upper chord (102), a vertical strut (103), and a diagonal strut (104). An X-shaped horizontal connecting rod (107) connects two adjacent rectangular frames. A purlin connecting bolt is fixedly connected to the top surface of the rectangular frame. A C-shaped purlin (105) is connected to the purlin connecting bolt. A photovoltaic module (106) is connected to the C-shaped purlin (105).

3. A large-span photovoltaic support structure for installation on steep hillsides according to claim 2, characterized in that, The concrete long strip foundation (5) is composed of a front bored pile (12), a first crushed stone cushion layer (11) and a cast-in-place concrete long strip slab (13). The cast-in-place concrete long strip slab (13) is cast on the first crushed stone cushion layer (11). The upper end of the front bored pile (12) passes through the first crushed stone cushion layer (11) and is set in the cast-in-place concrete long strip slab (13). A pre-embedded steel plate (14) for fixing the bottom support column (6) is pre-embedded on the top surface of the rear part of the cast-in-place concrete long strip slab (13).

4. A large-span photovoltaic support structure for installation on steep hillsides according to claim 2, characterized in that, A steel plate base (15) is welded to the bottom of the central support column (7). The steel plate base (15) is fixedly connected to the top surface of the large boulder (3) by expansion bolts (16). A lower clamping plate (17) is fixedly connected to the top of the central support column (7). A lower chord (101) is provided on the lower clamping plate (17). An upper clamping plate (18) is provided on the lower chord (101). A tie bolt (19) is provided between the lower clamping plate (17) and the upper clamping plate (18).

5. A large-span photovoltaic support structure for installation on a steep hillside according to claim 2, characterized in that, The bored pile foundation (8) consists of a first bored pile (801), a second bored pile (802) and a third bored pile (803). The three bored piles are drilled in a triangular arrangement on the exposed limestone (4) at the top of the slope. A second crushed stone cushion layer (804) is set on the exposed limestone (4). A concrete foundation (805) at the top of the slope is cast in place on the second crushed stone cushion layer (804). A top steel plate (806) is pre-embedded at the top of the concrete foundation (805). The top support column (9) is fixed on the top steel plate (806). The tops of the first bored pile (801), the second bored pile (802) and the third bored pile (803) are set in the concrete foundation (805) at the top of the slope. Anchor bars are connected under the top steel plate (806).

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