CN117569142A - Rainwater garden type central separation belt drainage structure and construction method - Google Patents

Abstract

The utility model relates to the field of road drainage technology, and provides a rainwater garden type central partition belt drainage structure, which comprises a belt ditch dug in the center of a road, a filtering component and a conveying component; the filter assembly comprises a first filter plate and a second filter plate arranged at two ends of the first filter plate, the first filter plate is arranged on a ditch wall with a ditch, a first planting layer is arranged above the first filter plate, and a water storage area is arranged below the first filter plate; the plate surface of the first filter plate is arranged in an arc shape; the second filter plate is arranged in an extending manner along the height direction of the belt groove; the conveying assembly comprises a plurality of conveying pipes, one ends of the conveying pipes extend to the water storage area, and the other ends of the conveying pipes extend into the first planting layer; the conveying pipe is filled with conveying sponge, one end of the conveying sponge extends to the first planting layer, and the other end of the conveying sponge extends to water in the water storage area, so that the difference of the soil water content in the central separation belt in rainy seasons and dry seasons is reduced.

Description

Rainwater garden type central separation belt drainage structure and construction method

Technical Field

The application relates to the field of road drainage technology, in particular to a rainwater garden type central separation belt drainage structure and a construction method.

Background

The rainwater garden is an ecological facility for managing rainwater by utilizing rainwater resources in cities through natural purification, infiltration, storage and other modes, and is generally composed of a manually excavated shallow green land, a sunk green land, a rainwater wetland and the like.

The center belt is a safety arrangement provided in the center of a road, and is mainly intended to prevent vehicles from crossing the center belt into an opposite lane and to protect structures in the center belt.

In the prior art, a rainwater garden is arranged in the center of a road, and is used as a central partition belt, so that on one hand, a part of rainfall is received, the drainage pressure of the road is relieved, and the air of the road is regulated; on the other hand, the road greening is increased, and the beautiful degree of the road is improved.

In some cities, rainy seasons and dry seasons are quite clear, so that the soil in the central partition belt is sometimes in a water shortage state, and sometimes has too high water content, so that the growth of plants is not facilitated. Therefore, there is a need to design a drainage structure for a center separator of a rainwater garden type, which reduces the difference between the water content of soil in the center separator in a rainy season and a dry season.

Disclosure of Invention

In order to reduce the difference of the soil moisture content in the central partition belt in rainy seasons and dry seasons, the application provides a rainwater garden type central partition belt drainage structure and a construction method.

On the one hand, the utility model provides a rainwater garden type central authorities median drainage structure adopts following technical scheme:

a rainwater garden type central separation belt drainage structure comprises a belt ditch dug in the center of a road, a filtering assembly and a conveying assembly; the filter assembly comprises a first filter plate and a second filter plate arranged at two ends of the first filter plate, the first filter plate is arranged on the ditch wall with the ditch, a first planting layer is arranged above the first filter plate, and a water storage area is arranged below the first filter plate; the plurality of first filter plates are arranged at intervals along the length direction of the belt grooves, and the plate surfaces of the first filter plates are arranged in an arc shape; the second filter plate is arranged in an extending mode along the height direction of the belt groove; the conveying assembly comprises a plurality of conveying pipes, one ends of the conveying pipes extend to the water storage area, and the other ends of the conveying pipes extend into the first planting layer; the pipe wall of the conveying pipe, which is positioned in the water storage area, and the pipe wall of the conveying pipe, which is positioned in the first planting layer, are provided with a plurality of water inlets; the conveying pipe is filled with conveying sponge, one end of the conveying sponge extends to the first planting layer, and the other end of the conveying sponge extends to water in the water storage area.

By adopting the technical scheme, when the precipitation amount is large, rainwater falls on the first planting layer, one part of the rainwater on the first planting layer is filtered by the first planting layer and falls into the water storage area, and the other part of the rainwater falls to the two ends of the first planting layer and falls between the adjacent second filter plates, and enters the water storage area for storage after being filtered by the second filter plates; and when the precipitation amount is smaller, conveying the water in the water storage area to the first planting layer by the conveying sponge and the conveying pipe so as to supplement the water for the first planting layer. On the one hand, when the precipitation amount is large, most of water is guided between the adjacent second filter plates and then is guided into the water storage area, so that the drainage pressure of the first planting layer is reduced; on the other hand, when the rainfall is low, the conveying assembly is utilized to supplement water for the first planting layer, so that the difference between the water content of the soil in the central dividing strip in a rainy season and a drought season is reduced.

Optionally, the height of the second filter plate is higher than the height of the first planting layer.

Through adopting above-mentioned technical scheme, before rivers flow into between the adjacent second filter, utilize the upper portion of second filter to filter rivers, reduce the risk that impurity such as leaf got into between the adjacent second filter.

Optionally, a filter sponge is disposed between adjacent first filter plates, and the filter sponge is used for filling the interval between adjacent second filter plates.

Through adopting above-mentioned technical scheme, utilize the filtration sponge to filter the rivers that get into the water storage area from the second filter, further reduce impurity entering water storage area in.

Optionally, a second planting layer is arranged above the filtering sponge, and the upper surface of the second planting layer is flush with two ends of the upper surface of the first planting layer.

By adopting the technical scheme, the beautiful degree of the central separation belt is improved.

Optionally, a planting box is arranged above the filtering sponge, and the second planting layer is positioned in the planting box; the planting box is connected to the ditch wall with the ditch in a sliding manner; the filter sponge is internally provided with a support spring, one end of the support spring is connected to the ditch bottom with the ditch, and the other end of the support spring is connected to the bottom wall of the planting box.

By adopting the technical scheme, on one hand, the planting box is supported by the filter sponge and the supporting spring together, so that the deformation of the filter sponge is not too large, and the water absorption capacity of the filter sponge is ensured; on the other hand, as the planting box is slidingly connected to the ditch wall with the ditch, when more water flows into the planting box, the mass of the planting box is increased, the filtering sponge and the supporting spring are compressed, the planting box slides downwards, so that the volume of the area for containing water between the adjacent first planting layers is increased, the temporary water storage function is realized, one part of the water flows into the water storage area through the second planting layers and the filtering sponge, and the other part flows into the water storage area through the second filter plates and the first planting layers; when rainfall is too much, the height of the upper surface of planting the case is less than the height of the lower surface of first planting layer for the water that is located the second planting layer is in the vegetation and the second filter filtration back of second planting layer direct entering water storage district, thereby improves drainage effect when slowing down drainage pressure.

Optionally, a drain pipe is arranged in the first planting layer, one end of the drain pipe extends to the water storage area, and the other end of the drain pipe is abutted against the surface of the second filter plate, which is away from the planting box; when the second planting layer is equal to the first planting layer in height, the planting box abuts against the end part of the drain pipe.

Through adopting above-mentioned technical scheme, more in precipitation, plant the case and move down the back, the tip of drain pipe is exposed, and a portion of water that is located second planting layer top directly enters into the water storage district through the drain pipe after the second filter filters, further improves drainage ability.

Optionally, the inside of carrying the sponge is provided with the bracing piece, the bracing piece is followed carry the length direction extension setting of sponge.

Through adopting above-mentioned technical scheme, when needing to change the sponge, take out the bracing piece from the conveyer pipe, utilize the bracing piece to carry the sponge out from the conveyer pipe, convenient and fast.

Optionally, the support rod adjacent to the second filter plate is connected to a side of the transport sponge away from the second filter plate; the planting box is connected with a pull rope, one end of the pull rope, which is far away from the planting box, is connected with the support rod adjacent to the second filter plate, and the pull rope is arranged in the drain pipe in a penetrating mode.

Through adopting above-mentioned technical scheme, when rainfall is great, plant the case and move down to drive the bracing piece through the stay cord and to be close to, the sponge is carried in bracing piece compression, makes the conveyer pipe form great passageway, in order to make the water of first planting layer flow into the water storage district through the conveyer pipe, further improves drainage ability.

Optionally, a drag reduction pipe is arranged in the first planting layer, one end of the drag reduction pipe is communicated with the drain pipe, and the other end of the drag reduction pipe is communicated with the conveying pipe; the stay cord is provided with many, and one part of stay cord is worn out from the tip of drain pipe back with the bracing piece is connected, another part of stay cord is worn out from the resistance-reducing pipe back with the bracing piece is connected.

Through adopting above-mentioned technical scheme for the atress at the both ends of bracing piece is comparatively even, makes the compression volume at the both ends of carrying the sponge comparatively even, ensures the drainage effect of conveyer pipe when rainfall is great.

On the other hand, the application provides a construction method of a rainwater garden type central partition belt drainage structure, which comprises the following steps:

s1: digging the ditch in the center of a road, pouring concrete to form ditch walls with ditches, and forming a supporting flange for supporting the first filter plate together when pouring the concrete, wherein the length of the supporting flange is the same as that of the first filter plate;

s2: connecting the delivery tube filled with the delivery sponge to the grooved bottom of the grooved;

s3: the first filter plate is arranged on the support flange, and the conveying pipe penetrates through the first filter plate when being erected;

s4: connecting to the second filter plate at an end of the first filter plate;

s5: and arranging the first planting layer on the first filter plate.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through setting up the interval between adjacent first filter, the first filter of medical history is the arc setting, and set up the second filter at the both ends of first filter, when rainfall is great, will rainwater guide to between the adjacent first filter, these waters enter into the water storage district that first filter descends through the filtration of second filter and store, when rainfall is less, the conveying component will store in the water transport in the water storage district first planting layer to reduce the difference of soil moisture content in the median separator in rainy season and dry season;

2. the filter sponge is arranged between the adjacent second filter plates, and the planting box provided with the second planting layer is arranged above the filter sponge, so that the attractiveness of the central separation belt is improved;

3. the planting box is connected to the ditch wall with the ditch in a sliding mode, the drain pipe is arranged in the first planting layer, the planting box is connected with the support rod through the pull rope, and the drainage capacity of the drainage structure is improved.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present application.

Fig. 2 is a schematic view showing the structure of dovetail ribs and dovetail grooves.

Fig. 3 is an enlarged schematic view of fig. 1 at a section a.

Fig. 4 is an enlarged schematic view of fig. 1 at section B.

Reference numerals illustrate: 1. a belt groove; 11. a dovetail groove; 2. a filter assembly; 21. a first filter plate; 22. a second filter plate; 23. a first planting layer; 231. a drain pipe; 24. a second planting layer; 25. filtering the sponge; 251. a support spring; 26. a third filter plate; 27. a planting box; 271. dovetail convex strips; 272. a pull rope; 28. a drag reducing pipe; 3. a transport assembly; 31. a delivery tube; 32. conveying sponge; 321. a sponge sheet; 33. a support rod; 34. a guide piece; 4. a water storage area.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4.

The embodiment of the application discloses a rainwater garden type central separation belt drainage structure.

Referring to fig. 1, a rainwater garden type central division strip drainage structure includes a strip groove 1 dug in the center of a road, a filter assembly 2, and a delivery assembly 3. The filter assembly 2 comprises a first filter plate 21 and second filter plates 22 arranged at two ends of the first filter plate 21, the first filter plate 21 is erected on a ditch wall with a ditch 1, a first planting layer 23 is arranged above the first filter plate 21, and a water storage area 4 is arranged below the first filter plate 21. The first filter plates 21 are provided in plurality, the first filter plates 21 are arranged at intervals along the length direction of the belt groove 1, the plate surfaces of the first filter plates 21 are arranged in an arc shape, and the second filter plates 22 are arranged in an extending mode along the height direction of the belt groove 1.

The delivery assembly 3 comprises a plurality of delivery tubes 31, one end of the delivery tubes 31 extending into the water storage area 4 and the other end extending into the first planting layer 23. The pipe wall of the conveying pipe 31 in the water storage area 4 and the pipe wall in the soil are provided with a plurality of water inlets. The conveying pipe 31 is filled with a conveying sponge 32, one end of the conveying sponge 32 extends to the first planting layer 23, and the other end extends to the water in the water storage area 4.

When the precipitation amount is large, rainwater falls on the first planting layer 23, one part of the rainwater located on the first planting layer 23 is filtered by the first planting layer 23 and falls into the water storage area 4, and the other part of the rainwater falls to the two ends of the first planting layer 23 and falls between the adjacent second filter plates 22, and enters the water storage area 4 for storage after being filtered by the second filter plates 22; when the precipitation amount is small, the conveying sponge 32 and the conveying pipe 31 convey the water in the water storage area 4 into the first planting layer 23 so as to supplement the first planting layer 23 with water. So that on the one hand, when the precipitation amount is large, most of water is guided between the adjacent second filter plates 22 and then into the water storage area 4, and the drainage pressure of the first planting layer 23 is reduced; on the other hand, the first planting layer 23 is supplemented with water by the conveying assembly 3 when the rainfall is small, so that the difference between the water content of the soil in the central partition belt and the dry season is reduced.

Wherein the height of the second filter plates 22 is higher than the height of the first planting layer 23, so that before the water flows between the adjacent second filter plates 22, the water flow is filtered by the upper parts of the second filter plates 22, and the risk that impurities such as leaves enter between the adjacent second filter plates 22 is reduced.

In other embodiments, the second filter plate 22 may be equal to the two ends of the first filter plate 21, where the bottom of the second filter plate 22 needs to be abutted against the bottom of the trench 1 or a third filter plate 26 is disposed at the bottom of the second filter plate 22, and the third filter plate 26 is used to connect adjacent second filter plates 22, so as to reduce the risk that impurities such as leaves enter the water storage area 4. After more impurities are gathered between the second filter plates 22, cleaning is performed.

Further, in this embodiment, a filtering sponge 25 is disposed between the adjacent first filter plates 21, and the filtering sponge 25 is used to fill the space between the adjacent second filter plates 22, so that the filtering sponge 25 is used to filter the water flow entering the water storage area 4 from the second filter plates 22, and further reduce the impurity entering the water storage area 4.

In this embodiment, the bottom of the second filter plate 22 is connected with a third filter plate 26, the third filter plate 26 is used for connecting two adjacent second filter plates 22 to each other, and a space is provided between the third filter plate 26 and the bottom of the trench 1, so that the third filter plate 26 is used for supporting the filter sponge 25, so that the water storage areas 4 below the adjacent first filter plates 21 are communicated with each other.

In other embodiments, sand may be filled between two adjacent second filter plates 22 to achieve the same effect as the filter sponge 25.

Further, in this embodiment, the second planting layer 24 is disposed above the filtering sponge 25, and is used for planting plants, so that the water-loving plants can be planted, and the aesthetic degree of the central partition belt is improved. It will be appreciated that the upper surface of the second planting layer 24 is flush with both ends of the upper surface of the first planting layer 23 so that water located in the first planting layer 23 can smoothly flow between adjacent first planting layers 23.

Further, in this embodiment, a planting box 27 is disposed above the filter sponge 25, and the second planting layer 24 is located in the planting box 27. The planting box 27 is slidably attached to the trench wall of the trench 1. The filter sponge 25 is provided with a support spring 251, one end of the support spring 251 is connected to the bottom of the trench 1, and the other end is connected to the bottom wall of the planting box 27. Thereby forming a support for the planting box 27 by the filter sponge 25 and the supporting spring 251 so that the deformation of the filter sponge 25 is not too large to ensure the water absorbing capacity of the filter sponge 25; in addition, since the planting box 27 is slidably connected to the trench wall of the trench 1, when more water flows into the planting box 27, the mass of the planting box 27 increases, the filter sponge 25 and the supporting springs 251 are compressed, the planting box 27 slides downward, so that the volume of the area for accommodating water between the adjacent first planting layers 23 increases, a temporary water storage function is achieved, and a part of the water flows into the water storage area 4 through the second planting layers 24 and the filter sponge 25, and the other part flows into the water storage area 4 through the second filter plate 22 and the first planting layers 23; when the rainfall is excessive, the height of the upper surface of the planting box 27 is lower than the height of the lower surface of the first planting layer 23, so that water on the second planting layer 24 directly enters the water storage area 4 after being filtered by the vegetation on the second planting layer 24 and the second filter plate 22, and the drainage effect is improved while the drainage pressure is reduced.

Referring to fig. 2, the planting box 27 is slidably connected to the trench wall of the trench 1, in which the outer wall of the planting box 27 is integrally formed with a dovetail convex strip 271, the trench wall of the trench 1 is provided with a dovetail groove 11, the dovetail groove 11 extends along the height direction of the trench 1, and the dovetail groove 11 is used for sliding and inserting the dovetail convex strip 271. Thereby simultaneously enabling the detachable connection of the planting box 27 with the trench wall of the trench 1, facilitating the replacement of the filter sponge 25 and the replacement of plants between adjacent first planting layers 23. It will be appreciated that in this embodiment, the ends of the support springs 251 abut against the bottom wall of the planting box 27.

Referring to fig. 1 and 3, further, a drain pipe 231 is provided in the first planting layer 23, one end of the drain pipe 231 extends to the water storage area 4, and the other end abuts against the surface of the second filter plate 22 facing away from the planting box 27. When the second planting layer 24 is at the same height as the first planting layer 23, the planting box 27 abuts against the end of the drain pipe 231. By this design, after the precipitation amount is more, the planting box 27 moves down, the end of the drain pipe 231 is exposed, and a part of water above the second planting layer 24 is filtered by the second filter plate 22 and then directly enters the water storage area 4 through the drain pipe 231, so that the drainage capacity is further improved.

Referring to fig. 3 and 4, further, the support rod 33 is disposed inside the conveying sponge 32, the support rod 33 is disposed along the length direction of the conveying sponge 32, when the sponge needs to be replaced, the support rod 33 is drawn out from the conveying pipe 31, and the conveying sponge 32 is carried out from the conveying pipe 31 by the support rod 33, so that convenience and rapidness are achieved.

In this embodiment, the end portion of the supporting rod 33 extending to the water storage area 4 is integrally formed with a guiding sheet 34, and the side wall of the guiding sheet 34 is used for abutting against the pipe wall of the conveying pipe 31, so that on one hand, a certain guiding effect is achieved when the conveying sponge 32 is installed, and on the other hand, when the conveying sponge 32 is detached, the conveying sponge 32 in the conveying pipe 31 is completely carried out by the guiding sheet 34, so that scraps are prevented from remaining in the conveying pipe 31, and finally falling into the water storage area 4 to rot and affect the water quality.

Referring to fig. 4, a specific structure in which the conveying sponge 32 is connected to the supporting rod 33 may be that the supporting rod 33 is adhered and fixed to a side wall of the conveying sponge 32; the conveying sponge 32 can also comprise a plurality of flaky sponge pieces 321, the peripheral sides of the sponge pieces 321 are used for being abutted against the pipe wall of the conveying pipe 31, the middle part of each sponge piece 321 is provided with a penetrating hole for the supporting rod 33 to penetrate through, and the plurality of sponge pieces 321 are sleeved on the supporting rod 33 along the length direction of the supporting rod 33, so that on one hand the connection between the supporting rod 33 and the conveying sponge 32 is convenient, and on the other hand the length of the conveying sponge 32 can be conveniently adjusted according to the actual installation condition by adjusting the quantity of the sponge pieces 321.

In addition, after the conveying sponge 32 is pulled out from the conveying pipe 31, an aeration pipe connected with an aeration fan can be inserted into the conveying pipe 31, and air is blown into the second planting layer 24 through the aeration pipe, so that on one hand, soil around the water through hole is loosened, the risk of blocking the water through hole is reduced, on the other hand, oxygen is provided for the first planting layer 23, and the microbial activity of the first planting layer 23 is improved.

Referring to fig. 3, in this embodiment, a support rod 33 adjacent to the second filter plate 22 is attached to the side of the transport sponge 32 remote from the second filter plate 22. The planting box 27 is connected with a pull rope 272, one end of the pull rope 272 away from the planting box 27 is connected to a supporting rod 33 adjacent to the second filter plate 22, and the pull rope 272 penetrates through the drain pipe 231. By this design, when rainfall is great, planting case 27 moves down to drive bracing piece 33 to being close to through stay cord 272, bracing piece 33 compression transport sponge 32 makes conveyer pipe 31 form great passageway, so that make the water of first planting layer 23 flow into in the water storage area 4 through conveyer pipe 31, further improves drainage ability.

It will be appreciated that, to ensure the compression effect of the support rods 33 on the conveying sponge 32, the support rods 33 in the present embodiment are of a sheet-like structure; meanwhile, in order to ensure the water delivery capacity of the sponge 32 in a normal state, a plurality of seepage ports communicated with the water through ports are formed at two ends of the supporting rod 33.

Further, the drag reduction pipe 28 is arranged in the first planting layer 23, one end of the drag reduction pipe 28 is communicated with the drain pipe 231, the other end of the drag reduction pipe 28 is communicated with the conveying pipe 31, the pull ropes 272 are provided with a plurality of pull ropes, one part of the pull ropes 272 are connected with the support rods 33 after penetrating out from the end part of the drain pipe 231, and the other part of the pull ropes 272 are connected with the support rods 33 after penetrating out from the drag reduction pipe 28, so that the stress at the two ends of the support rods 33 is uniform, the compression amount at the two ends of the conveying sponge 32 is uniform, and the drainage effect of the conveying pipe 31 when the rainfall is large is ensured.

The embodiment of the application also discloses a construction method of the rainwater garden type central interval drainage structure, which comprises the following steps:

s1: the ditch 1 is dug in the center of the road, concrete is poured to form the ditch wall with the ditch 1, and a supporting flange for supporting the first filter plate 21 is formed together when the concrete is poured, wherein the length of the supporting flange is equal to that of the first filter plate 21.

S2: the pipe 31 to which the string 272 is connected and the conveying sponge 32 is filled is welded and fixed to the bottom of the grooved 1.

S3: the first filter plate 21 is provided with penetrating holes for the conveying pipe 31 to penetrate through according to the arrangement of the conveying pipe 31; the first filter plate 21 provided with the through holes is mounted on the support flange.

S4: the two second filter plates 22 are connected through the third filter plate 26, and the connection mode can be welding or hinging; the two second filter plates 22 to which the third filter plates 26 are attached are connected to the two adjacent first filter plates 21, respectively, by welding or by hinging.

S5: placing a filter sponge 25 and a supporting spring 251 on the third filter plate 26 and between two adjacent second filter plates 22, placing a planting box 27 on the filter sponge 25, and fixedly connecting the other end of the pull rope 272 to the planting box 27, wherein the connection mode can be binding or connecting the pull ropes 272 on two sides of the two adjacent second filter plates 22 with each other firstly, and then pressing the planting box 27 on the pull ropes 272;

s6: the drain pipe 231 and the drag reducing pipe 28 are installed on the first filter plate 21, for installation stability, a first connecting rod can be arranged between the drain pipe 231 and the first filter plate 21, two ends of the first connecting rod are respectively bound and fixed on the drain pipe 231 and the first filter plate 21, a second connecting rod is arranged between the drag reducing pipe 28 and the first filter plate 21, and two ends of the second connecting rod are respectively bound and fixed on the drag reducing pipe 28 and the first filter plate 21.

S7: a first planting layer 23 is provided over the first filter plate 21 and vegetation is planted.

The implementation principle of the central separation belt drainage structure of the rainwater garden is as follows: when the rainfall is small, the conveying component 3 conveys the water in the water storage area 4 into the first planting layer 23, and supplements the water for the plants planted in the first planting layer 23.

When the rainfall is large, a part of the first planting layer 23 seeps under water, and enters the water storage area 4 through the first planting layer 23 and the first filter screen; a part of water flows into the second planting layer 24, and enters the water storage area 4 for storage through the second planting layer 24, the filtering sponge 25 and the filtering of the second filter screen.

When the rainfall is larger, the planting box 27 moves down, and the water of the first planting layer 23 flows into the water storage area 4 directly from the drain pipe 231 after being filtered by the second filter plate 22.

When the rainfall is larger, the planting box 27 continues to move downwards, the upper surface of the second planting layer 24 is lower than the lower surface of the first planting layer 23, and water of the second planting layer 24 directly enters the water storage area 4 through the second filter screen.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. The utility model provides a rainwater garden formula central authorities median drainage structures which characterized in that: comprises a ditch (1) dug in the center of a road, a filtering component (2) and a conveying component (3); the filter assembly (2) comprises a first filter plate (21) and second filter plates (22) arranged at two ends of the first filter plate (21), the first filter plate (21) is erected on the ditch wall with the ditch (1), a first planting layer (23) is arranged above the first filter plate (21), and a water storage area (4) is arranged below the first filter plate (21); the plurality of first filter plates (21) are arranged at intervals along the length direction of the belt groove (1), and the plate surfaces of the first filter plates (21) are arranged in an arc shape; the second filter plate (22) is arranged in an extending manner along the height direction of the belt groove (1); the conveying assembly (3) comprises a plurality of conveying pipes (31), one end of each conveying pipe (31) extends to the water storage area (4), and the other end of each conveying pipe extends into the first planting layer (23); the pipe wall of the conveying pipe (31) positioned in the water storage area (4) and the pipe wall positioned in the first planting layer (23) are provided with a plurality of water inlets; the conveying pipe (31) is filled with a conveying sponge (32), one end of the conveying sponge (32) extends to the first planting layer (23), and the other end of the conveying sponge extends to water in the water storage area (4).

2. A rainwater garden type central separator drainage structure as claimed in claim 1, wherein: the height of the second filter plate (22) is higher than that of the first planting layer (23).

3. A rainwater garden type central separator drainage structure as claimed in claim 1, wherein: a filter sponge (25) is arranged between the adjacent first filter plates (21), and the filter sponge (25) is used for filling the interval between the adjacent second filter plates (22).

4. A rainwater garden type central separator drainage structure as claimed in claim 3, wherein: the top of filtering sponge (25) is provided with second planting layer (24), the upper surface of second planting layer (24) with the both ends of the upper surface of first planting layer (23) flush.

5. A rainwater garden type central separator drainage structure as claimed in claim 4, wherein: a planting box (27) is arranged above the filtering sponge (25), and the second planting layer (24) is positioned in the planting box (27); the planting box (27) is connected to the ditch wall of the ditch (1) in a sliding manner; the filter sponge (25) is internally provided with a supporting spring (251), one end of the supporting spring (251) is connected to the ditch bottom of the ditch (1), and the other end of the supporting spring is connected to the bottom wall of the planting box (27).

6. A rainwater garden type central separator drainage structure as claimed in claim 5, wherein: a drain pipe (231) is arranged in the first planting layer (23), one end of the drain pipe (231) extends to the water storage area (4), and the other end of the drain pipe is abutted against the surface, deviating from the planting box (27), of the second filter plate (22); when the second planting layer (24) is equal to the first planting layer (23), the planting box (27) is abutted against the end part of the drain pipe (231).

7. A rainwater garden type central separator drainage structure as claimed in claim 6, wherein: the inside of carrying sponge (32) is provided with bracing piece (33), bracing piece (33) are followed carry the length direction extension setting of sponge (32).

8. A rainwater garden type central separator drainage structure as claimed in claim 7, wherein: the support rod (33) adjacent to the second filter plate (22) is connected to the side of the conveying sponge (32) away from the second filter plate (22); the planting box (27) is connected with a pull rope (272), one end, away from the planting box (27), of the pull rope (272) is connected to the support rod (33) adjacent to the second filter plate (22), and the pull rope (272) penetrates through the drain pipe (231).

9. A rainwater garden type central separator drainage structure as claimed in claim 8, wherein: a drag reduction pipe (28) is arranged in the first planting layer (23), one end of the drag reduction pipe (28) is communicated with the drain pipe (231), and the other end of the drag reduction pipe is communicated with the conveying pipe (31); the stay cords (272) are provided with a plurality of stay cords, wherein one part of the stay cords (272) are connected with the support rod (33) after penetrating out from the end part of the drain pipe (231), and the other part of the stay cords (272) are connected with the support rod (33) after penetrating out from the drag reduction pipe (28).

10. A method of constructing a rainwater garden-type central separator drainage structure as claimed in any one of claims 1 to 9, wherein: the method comprises the following steps:

s1: digging the ditch (1) in the center of a road, pouring concrete to form ditch walls of the ditch (1), and forming a supporting flange for supporting the first filter plate (21) together when pouring the concrete, wherein the length of the supporting flange is the same as that of the first filter plate (21);

s2: connecting the delivery pipe (31) filled with the delivery sponge (32) to the ditch bottom of the ditch (1);

s3: the first filter plate (21) is erected on the support flange, and the conveying pipe (31) passes through the first filter plate (21) during erection;

s4: -connecting the second filter plate (22) at an end of the first filter plate (21);

s5: -laying the first planting layer (23) on the first filter plate (21).