Drainage and soil fixation system for retention wall type sloping field photovoltaic field

Abstract

The utility model discloses a drainage and soil fixation system of a retention wall type sloping field photovoltaic field, which relates to the technical field of drainage structures of photovoltaic fields and comprises a sloping field photovoltaic field, a drainage channel is arranged on the low-terrain side of the sloping field photovoltaic field, and a transverse main retention wall and a longitudinal secondary retention wall are arranged on the surface of the sloping field photovoltaic field. The main water retaining wall and the secondary water retaining wall are in a criss-cross grid shape, an overflowing notch is reserved in the end, close to the main water retaining wall, of the secondary water retaining wall, the main water retaining wall and the secondary water retaining wall are provided with sand blocking walls at the overflowing notch, and the main water retaining wall and the secondary water retaining wall are connected into a whole underground through the sand blocking walls. And a soil fixation grid is arranged on the surface of the slope photovoltaic field area and between the grid-shaped main retention wall and the grid-shaped secondary retention wall. The water retaining wall system is used for separating and guiding surface runoff, and natural overflowing and underground seepage capacity of a site are fully utilized, so that the effects of reducing water and soil loss of the site and reducing the cost of a drainage system are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic field area drainage structure technical field especially is involved in a kind of retaining wall type slope photovoltaic field area's drainage solid soil system. BACKGROUND

[0002] The field area of photovoltaic power generation can be distributed in vast field, under the condition of reducing the reformation to environment as far as possible, generally reduce the reformation to terrain as far as possible, to cause the field area of photovoltaic installation is natural slope ground shape.And in the field area of slope ground shape, drainage solid soil is one of the most important contents of slope photovoltaic design, especially in loose soil and rainwater abundant area.Rainfall brings rainwater to drop slope after collection into surface runoff under the action of gravity, continuously accelerates and constantly takes away surface sediment under the action of gravity, forms gully on runoff path.If not controlled, gully will continuously expand and deepen, eventually lead to photovoltaic support instability damage.

[0003] For the above situation, the traditional drainage design generally will select to add drainage branch ditch in photovoltaic subarray, so that most rainwater directly falls into drainage branch ditch from the gap between photovoltaic panel, then is collected to the drainage main ditch outside subarray.But this arrangement has the following shortcomings, first, the wet week and roughness of drainage branch ditch are lower than original ground, overflow speed accelerates, runoff collection time reduces, rainfall intensity increases per unit time, surface runoff peak flow increases, drainage ditch cross section size increases, subarray area reaches certain degree, even photovoltaic support needs to be arranged in drainage ditch, which is not conducive to structural safety;Second, drainage ditch civil engineering quantity is large, construction period is long, affects photovoltaic support construction and module installation;Third, drainage ditch is lower than original ground, and subarray surface silt is easily taken away by water flow, causes water and soil loss, and affects natural environment.To overcome the above shortcomings, we propose a kind of retaining wall type slope photovoltaic field area's drainage solid soil system. UTILITY MODEL CONTENT

[0004] The utility model is aimed at, for loose soil and rainfall abundant area of slope photovoltaic field area, the traditional drainage design has the problems of large civil engineering quantity, not conducive to construction organization, serious water and soil loss.

[0005] In order to realize the above-mentioned purpose, the utility model provides a kind of retaining wall type slope photovoltaic field area's drainage solid soil system, 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 buried 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, and the top of the secondary water retaining wall is flush with the top of the main water retaining wall close to the flow-through gap.

[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 along the same main water retaining wall and starting from the drainage channel.

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

[0013] In conclusion, the application has the following beneficial effects:

[0014] The application combines the soil fixation grid, the main water retaining wall and the secondary water retaining wall, 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, a 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 limited to be 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 of the scouring prevention protection is reduced, and the water and soil loss is reduced.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the utility model.

[0016] In the drawings:

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

[0018] The following will be combined with the drawings Figure 1 The utility model is further explained in detail.

[0019] Please refer to the drawings in the specification Figure 1 , the utility model provides an embodiment: a kind of retaining wall type slope photovoltaic field area's drainage soil fixation 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 divides into independent drainage watershed by slope photovoltaic field area 10, main retaining wall 1 and secondary retaining wall 2 divide into independent catchment unit by slope photovoltaic field area 10. Secondary retaining wall 2 is close to the end of main retaining wall 1 and is reserved overflow gap, and each catchment unit is drained by overflow gap, and the bottom of main retaining wall 1 and secondary retaining wall 2 is all buried below ground, and the top is all 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 being located underground in main retaining wall 1 and secondary retaining wall 2, and the surface of slope photovoltaic field area 10 is provided with soil grid 4 between grid-shaped main retaining wall 1 and secondary retaining wall 2.

[0020] Overflow gap of same main retaining wall 1 is connected to form overflow passage, and the top of slope photovoltaic field area 10 is provided with scour protection bottom 5 at overflow passage, the width of scour protection bottom 5 is greater than the width of overflow passage, and scour protection bottom 5 is divided into lower small-diameter stone layer and upper large-diameter block stone layer. The water of each independent drainage watershed is drained into drainage ditch 6 through overflow passage, and the stratification of scour protection bottom 5 and the width of scour protection bottom 5 being kept greater than the width of overflow passage can make the area of runoff flow to be located on scour protection bottom 5, while having good filter performance, reduce the silt carried by runoff at the bottom of overflow passage.

[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 formed by connecting the primary retaining wall 1 and the secondary retaining wall 2 into a whole underground, 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, 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 rolls violently 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 is retained and accumulated by the sand retaining wall 3. Therefore, the sand retaining wall 3 has good self-repairing capability and 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, the sand retaining wall 3 can always maintain sufficient depth below the sand surface and avoid instability and damage. The sand retaining wall 3 can be made of concrete, plastic baffle and the like.

[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 fact that the width of the anti-scouring protection bottom 5 is 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, so that the anti-scouring protection bottom 5 has good anti-filtration performance and reduces the sand carried away from the bottom of the flow passage by the runoff.

[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, 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 utility model, which do not limit the protection scope of the utility model, so that: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

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. A 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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