Water retaining wall type slope photovoltaic field area drainage and soil consolidation system

Abstract

The application discloses a kind of retaining wall type slope photovoltaic field area's drainage solid soil system, it is related to photovoltaic field area drainage structure technical field, including slope photovoltaic field area, the side of slope photovoltaic field area lower topography is provided with drainage channel, the surface of slope photovoltaic field area is provided with transverse main water retaining wall and longitudinal secondary water retaining wall, main water retaining wall and secondary water retaining wall are longitudinal and transverse staggered grid, secondary water retaining wall is close to the end of main water retaining wall and is reserved overflow gap, main water retaining wall and secondary water retaining wall are provided with sand retaining wall at overflow gap, sand retaining wall is connected into whole by main water retaining wall and secondary water retaining wall in the ground, the surface of slope photovoltaic field area is located between grid-shaped main water retaining wall and secondary water retaining wall and is provided with solid soil grid.This application is separated by water retaining wall system and guides surface runoff, makes full use of site natural overflow and underground seepage capacity, to reduce the effect of field area water and soil loss and reduce drainage system cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic field drainage structure, in particular to a retaining wall type slope photovoltaic field drainage and soil fixation system. BACKGROUND

[0002] The photovoltaic power generation field can be distributed in a wide open field. In order to reduce the environmental modification as much as possible, the modification of the terrain is generally reduced as much as possible, so that the photovoltaic installation field is in a natural slope state. In the slope field, drainage and soil fixation are one of the most important contents of slope photovoltaic design, especially in areas with loose soil and abundant rainfall. After heavy rain, rainwater falls on the slope and forms surface runoff. Under the action of gravity, the surface runoff continuously accelerates and continuously carries away surface sediments, forming gullies on the runoff path. If not controlled, the gullies will continue to expand and deepen, eventually leading to instability and damage of the photovoltaic support.

[0003] In view of the above situation, the traditional drainage design generally selects to add a drainage branch ditch inside the photovoltaic subarray, so that most of the rainwater directly falls into the drainage branch ditch from the gap between the photovoltaic panels, and then flows into the drainage main ditch outside the subarray. However, this arrangement has the following disadvantages: first, the wet perimeter and roughness of the drainage branch ditch are lower than those of the original ground, the flow velocity is accelerated, the runoff collection time is reduced, the rainfall intensity per unit time is increased, the peak flow of surface runoff is increased, the cross-sectional size of the drainage ditch is increased, and when the subarray area reaches a certain degree, the photovoltaic support may even need to be arranged in the drainage ditch, which is not conducive to the structural safety; second, the drainage ditch has a large amount of civil engineering work and a long construction period, which affects the construction of the photovoltaic support and the installation of the components; and third, the drainage ditch is lower than the original ground, and the surface sediment of the subarray is easily carried away by the water flow, causing soil erosion and affecting the natural environment. In order to overcome the above-mentioned shortcomings, a retaining wall type slope photovoltaic field drainage and soil fixation system is proposed. SUMMARY

[0004] The purpose of the present application is to solve the problems of traditional drainage design in the slope photovoltaic field of loose soil and abundant rainfall area, such as large amount of civil engineering work, not conducive to construction organization, and serious soil erosion.

[0005] In order to achieve the above-mentioned purpose, the present application provides a retaining wall type slope photovoltaic field drainage and soil fixation system, which adopts the following technical scheme:

[0006] The application discloses a drainage and soil fixation system for a slope photovoltaic field area.

[0007] Further, the flow-through gaps of the same main water retaining walls are connected to form a flow-through channel, and a scouring prevention bottom protection layer is arranged on the top of the slope photovoltaic field area and located at the flow-through channel.

[0008] Further, the width of the scouring prevention bottom protection layer is greater than the width of the flow-through channel.

[0009] Further, the scouring prevention bottom protection layer is divided into a lower small-grain stone layer and an upper large-grain block stone layer.

[0010] Further, the bottom of the main water retaining wall and the bottom of the secondary water retaining wall are both embedded below the ground, and the top of the main water retaining wall and the top of the secondary water retaining wall are both higher than the ground.

[0011] Further, the height of the sand retaining wall is equal to or slightly greater than the height of the ground of the slope photovoltaic field area, and the top of the sand retaining wall is higher than the bottom of the adjacent sand retaining wall.

[0012] Further, the soil fixation grid is a fiber woven net structure which is laid between the main water retaining wall and the secondary water retaining wall.

[0013] In conclusion, the application has the following advantages:

[0014] The application increases the roughness of the slope surface of the photovoltaic field, reduces the surface runoff speed, prolongs the runoff collection time, and reduces the peak flow of the runoff; the open water retaining wall is used instead of the closed drainage channel, the channel for the runoff infiltration is reserved, part of the surface runoff is converted into underground seepage, the peak flow of the runoff is reduced, and thus the amount of civil engineering of the drainage system is reduced; the surface runoff is only collected along the secondary water retaining wall and the main water retaining wall, the scouring prevention range is reduced from the whole field to the reserved drainage channel; the secondary water retaining wall and the main water retaining wall block the runoff twice, the flow speed of the runoff in the reserved drainage channel is reduced, the requirement for the scouring prevention is reduced, and the water and soil loss is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural diagram of the present application.

[0016] in the drawings:

[0017] 1, main retaining wall; 2, secondary retaining wall; 3, sand retaining wall; 4, soil stabilization grid; 5, scour protection bottom protection; 6, drainage ditch; 10, slope photovoltaic field area. DETAILED DESCRIPTION

[0018] The following will be combined with the Figure 1 Further detailed description of the present application.

[0019] Please refer to the drawings in the specification Figure 1 , the present application provides an embodiment: a kind of retaining wall type slope photovoltaic field area drainage soil stabilization system, including slope photovoltaic field area 10, the side of slope photovoltaic field area 10 lower terrain is provided with drainage ditch 6, the surface of slope photovoltaic field area 10 is provided with transverse main retaining wall 1 and longitudinal secondary retaining wall 2, main retaining wall 1 and secondary retaining wall 2 are staggered grid, and main retaining wall 1 extends to the other side of slope photovoltaic field area 10 lower terrain with drainage ditch 6 as starting point, main retaining wall 1 is divided into a independent drainage watershed by slope photovoltaic field area 10, main retaining wall 1 and secondary retaining wall 2 are divided into a independent catchment unit by slope photovoltaic field area 10. The end of secondary retaining wall 2 close to main retaining wall 1 is reserved overflow gap, each catchment unit is drained through overflow gap, the bottom of main retaining wall 1 and secondary retaining wall 2 is buried below ground, and the top of main retaining wall 1 and secondary retaining wall 2 is above ground, and the top of secondary retaining wall 2 is flush with the top of main retaining wall 1 close to overflow gap. Main retaining wall 1 and secondary retaining wall 2 are provided with sand retaining wall 3 at overflow gap, sand retaining wall 3 is connected into a whole by main retaining wall 1 and secondary retaining wall 2 underground, and the surface of slope photovoltaic field area 10 is provided with soil stabilization grid 4 between grid-shaped main retaining wall 1 and secondary retaining wall 2.

[0020] Overflow gap of the same main retaining wall 1 is connected to form overflow channel, and the top of slope photovoltaic field area 10 is provided with scour protection bottom protection 5 at overflow channel, the width of scour protection bottom protection 5 is greater than the width of overflow channel, and scour protection bottom protection 5 is divided into lower small-diameter stone layer and upper large-diameter block stone layer. The accumulated water of each independent drainage watershed is drained into drainage ditch 6 through overflow channel, the stratification of scour protection bottom protection 5, and keeping the width of scour protection bottom protection 5 greater than the width of overflow channel can make the area of runoff flow above scour protection bottom protection 5, which has good filter performance, while reducing the runoff from the bottom of overflow channel.

[0021] The elevation of the sand retaining wall 3 is equal to or slightly greater than the elevation of the ground of the photovoltaic field area 10 at this place, and along the same main water retaining wall 1, the top elevation of the sand retaining wall 3 is higher than the bottom elevation of the adjacent sand retaining wall 3.

[0022] The soil stabilizing grid 4 is a fiber woven net structure laid between the main water retaining wall 1 and the secondary water retaining wall 2.

[0023] In summary, when designing the drainage and soil stabilization of the photovoltaic field area on the slope, the lower side of the photovoltaic field area 10 is provided with a drainage ditch 6, and the surface of the photovoltaic field area 10 is provided with a transverse main water retaining wall 1 and a longitudinal secondary water retaining wall 2. The bottom of the main water retaining wall 1 and the secondary water retaining wall 2 is buried below the ground, and the top is above the ground, and the top of the secondary water retaining wall 2 is flush with the top of the main water retaining wall 1 close to the flow gap. And in order to facilitate construction in the photovoltaic field area, the main water retaining wall 1 is generally arranged at the place where the space between the photovoltaic panel support and the ground is the largest or between two photovoltaic components, and the main water retaining wall 1 can be made of water-proof materials such as concrete, plastic baffle, etc.

[0024] The main water retaining wall 1 and the secondary water retaining wall 2 are in a longitudinal and transverse staggered grid shape, and the main water retaining wall 1 extends to the other side of the photovoltaic field area 10 with higher terrain from the drainage ditch 6. The main water retaining wall 1 divides the photovoltaic field area 10 on the slope into independent drainage basins, and the runoff of each drainage basin is guided by the main water retaining wall 1 to the drainage ditch 6 on the low side, ensuring that the absolute drop between each drainage basin is limited, and the kinetic energy of the water flow in adjacent drainage basins cannot be accumulated, reducing the runoff speed. The main water retaining wall 1 and the secondary water retaining wall 2 divide the photovoltaic field area 10 on the slope into independent catchment units, and the secondary water retaining wall 2 has a flow gap at one end close to the main water retaining wall 1. Each catchment unit drains through the flow gap, avoiding direct accumulation of kinetic energy of water flow in adjacent catchment units. The rainwater in each catchment unit flows along the slope, collides with the secondary water retaining wall 2 after the first energy dissipation, and then flows along the secondary water retaining wall 2 to the main water retaining wall 1. When reaching the flow passage, it collides with the runoff in the flow passage on one side and collides with the main water retaining wall 1 on the other side, completing the second energy dissipation. The secondary water retaining wall 2 can be made of water-proof materials such as concrete, plastic baffle, etc.

[0025] The sand retaining wall 3 is connected to the primary retaining wall 1 and the secondary retaining wall 2 by being laid underground, and the elevation of the sand retaining wall 3 is equal to or slightly greater than the elevation of the ground surface of the photovoltaic field area 10 at the position, and the elevation of the top of the sand retaining wall 3 is higher than the elevation of the bottom of the adjacent sand retaining wall 3 along the same primary retaining wall 1 and starting from the drainage ditch 6. In the case of extreme rainfall, the upstream water flow is violently rolled and carries away part of the sand, the sand retaining wall 3 is exposed to the ground and forms a small sedimentation tank in front of the sand retaining wall 3, and when the rainfall intensity and runoff speed decrease, most of the upstream sand will be intercepted and accumulated by the sand retaining wall 3. Therefore, the sand retaining wall 3 has good self-repairing ability, which can ensure that the upstream scouring does not continue to deepen. In terms of structure, the elevation of the top of the sand retaining wall 3 is higher than the elevation of the bottom of the adjacent sand retaining wall 3 along the same primary retaining wall 1 and starting from the drainage ditch 6, so that even if the downstream of the sand retaining wall 3 is eroded, the sand surface after the erosion is flush with the top of the next level sand retaining wall 3, and the sand retaining wall 3 can always maintain sufficient depth below the sand surface to avoid instability and damage. The sand retaining wall 3 can be made of concrete, plastic baffle and other materials.

[0026] The top of the photovoltaic field area 10 on the slope is provided with an anti-scouring protection bottom 5 at the position of the flow passage, the width of the anti-scouring protection bottom 5 is greater than the width of the flow passage, and the anti-scouring protection bottom 5 is divided into a lower layer of small-diameter gravel layer and an upper layer of large-diameter block stone layer. The water in each independent drainage watershed is discharged into the drainage ditch 6 through the flow passage, the layered structure of the anti-scouring protection bottom 5, and the width of the anti-scouring protection bottom 5 being greater than the width of the flow passage can make the area through which the runoff flows be located above the anti-scouring protection bottom 5, and reduce the sand carried away from the bottom of the flow passage while having good anti-filtration performance.

[0027] The surface of the photovoltaic field area 10 on the slope is provided with a soil-fixing grid 4 between the grid-shaped primary retaining wall 1 and the secondary retaining wall 2, which is laid in each water-collecting unit divided by the primary retaining wall 1 and the secondary retaining wall 2, and is made of natural or artificial fibers such as coconut fiber, straw fiber, jute fiber and polypropylene.

[0028] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A water retaining wall type slope photovoltaic field area drainage and soil solidification system comprising a slope photovoltaic field area (10), characterized in that: The lower side of the slope photovoltaic field area (10) is provided with a drainage ditch (6), the surface of the slope photovoltaic field area (10) is provided with a transverse main water retaining wall (1) and a longitudinal secondary water retaining wall (2), the main water retaining wall (1) and the secondary water retaining wall (2) are in a longitudinal and transverse staggered grid shape, the main water retaining wall (1) extends to the other side of the slope photovoltaic field area (10) with the drainage ditch (6) as the starting point, the secondary water retaining wall (2) is provided with a flow gap at one end close to the main water retaining wall (1), the main water retaining wall (1) and the secondary water retaining wall (2) are provided with a sand retaining wall (3) at the flow gap, the sand retaining wall (3) is connected to the main water retaining wall (1) and the secondary water retaining wall (2) by being integrated underground, and the surface of the slope photovoltaic field area (10) is provided with a soil stabilizing grid (4) between the main water retaining wall (1) and the secondary water retaining wall (2) in the grid shape.

2. A retaining wall type slope photovoltaic field area drainage and soil consolidation system according to claim 1, characterized in that: The flow gaps of the same main water retaining wall (1) are connected to form a flow channel, and the top of the slope photovoltaic field area (10) is provided with an anti-scouring bottom protection (5) at the flow channel.

3. A retaining wall type slope photovoltaic field area drainage and soil consolidation system according to claim 2, characterized in that: The width of the anti-scouring bottom protection (5) is greater than the width of the flow channel.

4. A retaining wall type slope photovoltaic field area drainage and soil consolidation system according to claim 2, characterized in that: The anti-scouring bottom protection (5) is divided into a lower small-diameter stone layer and an upper large-diameter block stone layer.

5. A retaining wall type slope photovoltaic field area drainage and soil consolidation system according to claim 1, characterized in that: The bottom of the main water retaining wall (1) and the bottom of the secondary water retaining wall (2) are both buried below the ground, and the top of the main water retaining wall (1) and the top of the secondary water retaining wall (2) are both above the ground, and the top of the secondary water retaining wall (2) is flush with the top of the main water retaining wall (1) close to the flow gap.

6. A retaining wall type slope photovoltaic field area drainage and soil consolidation system according to claim 1, characterized in that: The elevation of the sand retaining wall (3) is equal to or slightly greater than the elevation of the ground of the slope photovoltaic field area (10) at this place, and along the same main water retaining wall (1) with the drainage ditch (6) as the starting point, the top elevation of the sand retaining wall (3) is higher than the bottom elevation of the adjacent sand retaining wall (3).

7. The retaining wall type slope photovoltaic field area drainage and soil consolidation system according to claim 1, characterized in that: The soil stabilizing grid (4) is a fiber woven fishing net structure laid between the main water retaining wall (1) and the secondary water retaining wall (2).

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