CN113605512A

CN113605512A - Multi-layer graded-purification storage-adjustable concave green land and construction method thereof

Info

Publication number: CN113605512A
Application number: CN202110876028.1A
Authority: CN
Inventors: 周先武; 王海宝; 董剑华; 李钢; 陈宏业; 张志标; 黄朝鑫; 温建明
Original assignee: Guangdong Jiangzao Garden Engineering Co ltd
Current assignee: Guangdong Jiangzao Garden Engineering Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-11-05
Anticipated expiration: 2041-07-30
Also published as: CN113605512B

Abstract

The invention discloses a multilayer graded purified storage-adjustable concave greenbelt and a construction method thereof, belonging to the field of garden construction and having the following beneficial effects: when the water level of the upstream reservoir rises to a height higher than the bend of the siphon pipe, water flows overflow from the siphon pipe to the downstream reservoir, negative pressure is formed in the siphon pipe in the process, so that rainwater in the upstream reservoir can be continuously sucked to the downstream, and because one end of the siphon pipe located in the upstream reservoir extends to the bottom of the reservoir, the upstream adjacent reservoir can be quickly and automatically emptied, so that good water storage capacity can be maintained, and the ground can be kept dry. And the siphon is utilized for automatic adjustment, and compared with the existing modes of using a drainage pump, a sensor for electric control and the like, the siphon is higher in stability and lower in cost.

Description

Multi-layer graded-purification storage-adjustable concave green land and construction method thereof

Technical Field

The invention relates to the field of garden construction, in particular to a multi-layer graded-purification storage-adjustable concave green land construction method.

Background

The recessed greenery is a public greenery having a lower elevation than the surrounding road surface, also known as a low elevation greenery. The flower bed is contrary to a flower bed, the concept is that rainwater is received and stored by utilizing an open space, the runoff drainage is reduced, generally speaking, a low-potential green land has certain requirements on the concave depth, and the soil quality is not improved. Compared with the line shape of the vegetation shallow trench, the vegetation shallow trench mainly has the surface which can receive more rainwater, and the plants in the vegetation shallow trench are mainly made of native herbs.

Often present in the area that the annual rainfall is great and can't be with the whole and quick infiltration of rainwater and can't save these two aspects with unnecessary rainwater to lead to the rainwater excessive, both can't effectively reuse also influence the pedestrian and pass to the rainwater, and the soaking of a large amount of unnecessary rainwater will also destroy the ecology of recessed greenery patches. In addition, in the prior concave greenbelts on two sides of the downhill slope, water is often converged to the low-lying terrain of the slope bottom due to untimely water seepage, and accumulated water at the slope bottom is easily formed.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the retaining of the recessed formula greenery patches of present most pavement, lane both sides, drainage ability are limited, often seep water when the rainfall surge, the drainage is untimely, leads to the rainwater excessive easily or converge to slope bottom low-lying topography, and also need longer time supply the rainwater to infiltrate down after the rain stops, often leads to the mashed root of vegetation in this in-process, consequently has the improvement space.

Disclosure of Invention

In order to improve the water storage capacity and the water drainage speed of the concave green land, the application provides a construction method of the multilayer graded purification adjustable concave green land.

The application provides a multilayer hierarchical purification's adjustable sunken greenery patches construction method of holding adopts following technical scheme:

a construction method of multi-layer graded purified storage-adjustable concave green land comprises the following steps:

the method comprises the following steps: excavating foundation pits along two sides of a road;

step two: laying municipal drainage pipes in the foundation pit;

step three: building a plurality of independent water reservoirs with gradually lowered topography along the gradient of the road in sequence;

step four: arranging a support pillar in the reservoir, and sequentially laying a support steel mesh, a water permeable support plate, a water permeable brick, a first gravel layer, a geotechnical cloth layer, a second gravel layer and a laterite soil layer above the support pillar;

step five: paving a planting soil layer which is leveled with the road and is naturally set on a slope above the laterite layer of each reservoir, and planting vegetation on the planting soil layer;

the pond bottoms of adjacent water reservoirs are gradually reduced along the gradient of a road, a siphon is connected between the adjacent water reservoirs, the siphon is in an inverted U shape, one end of the siphon extends to the pond bottom of the upstream water reservoir, and the other end of the siphon extends to the first gravel layer of the downstream water reservoir; wherein, the siphon pipe of the reservoir with the lowest topography extends out of one end of the reservoir and is connected with a municipal drainage pipe.

By adopting the technical scheme, the foundation pit is excavated along the self gradient of the road on the two sides of the inclined road or sidewalk, and the drain pipe pre-buried in the foundation pit is used for overflow or conventional municipal drainage. Then build the cistern that a plurality of benchmarks pole gradually descend along the slope of road in proper order, the cistern is the vertical opening in square and top, and the support column that sets up in the cistern, support the steel mesh, the backup pad that permeates water, the brick that permeates water etc. all are used for playing the support to ground gravel layer, soil layer to form open retaining space in road both sides. Wherein the red soil layer of the top, plant the soil layer and all be used for supplying the vegetation to grow, when the rainfall, the rainwater sees through in proper order and plants the soil layer, soil layer etc. permeates water soil layer, can not be too for a long time at surface gathered water, then the rainwater passes through the second gravel layer in proper order again, the first gravel layer of geotechnological cloth layer and the brick that permeates water, the backup pad that permeates water, above-mentioned layer structure can filter the rainwater, avoid the earth on red soil layer to run off in a large number, thereby be favorable to improving the vegetation survival rate and reducing the turbidity of cistern, the later stage of being convenient for carries out cyclic utilization to the rainwater. According to the principle of the communicating vessel, when the water level of the upstream reservoir rises to a height higher than the bent position of the siphon, water flows overflow from the siphon to the downstream reservoir, negative pressure is formed in the siphon in the process, so that rainwater in the upstream reservoir can be continuously sucked to the downstream, and because one end of the siphon, which is positioned in the upstream reservoir, extends to the bottom of the reservoir, the upstream adjacent reservoir can be quickly and automatically emptied, so that better water storage capacity can be maintained, and the dryness of the ground can be maintained. And utilize siphon automatically regulated, compare modes such as current use drain pump, sensor automatically controlled, stability is higher, and the cost is lower, and finally arrange the rainwater to municipal drainage pipe, can keep the drying of planting soil layer top all the time, make rivers can not flow down along slope one-tenth thigh, protected the drying of the lower building of relief and the unblocked of traffic. Wherein with the siphon one end intercommunication to first gravel layer of downstreams cistern down, be favorable to filtering the rainwater in the cistern again through first gravel layer, realize the hierarchical purification to the rainwater in the cistern of downstreams is comparatively clean.

Preferably, the bottom of the reservoir that the topography is lowest still communicates there is the circulating pipe, the other end of circulating pipe extends to the topography is highest the top of reservoir and stretch out the planting soil layer, the suction pump is installed to the circulating pipe.

By adopting the technical scheme, the circulating pipe is used for pumping the rainwater in the reservoir at the most downstream to the surface of the upstream under the action of the water pump, so that the planting soil layer can be irrigated in rainy days, and the rainwater can be recycled.

Preferably, it is adjacent the same side wall of sharing between the cistern, the siphon runs through the side wall, be provided with on the side wall be used for right the interception mechanism that the siphon dams.

Through adopting above-mentioned technical scheme, the same side wall of sharing can reduce the construction cost, and the mechanism that dams is used for keeping apart adjacent cistern each other to can avoid too much emptying the water of the cistern of upper reaches, can save the rainwater more.

Preferably, the intercepting mechanism comprises a cavity arranged in the side wall, a control rod is connected in the side wall in a vertical sliding manner, the lower end of the control rod is rotatably connected with an intercepting plate which is connected in the cavity in a vertical clamping manner, the siphon is divided into two sections, openings of the two sections of the siphon are communicated with the cavity, the openings of the two sections of the siphon are opposite to and attached to the intercepting plate, and through holes for conducting the two sections of the siphon are formed in the intercepting plate; when the control rod is lifted, the through hole is staggered with the siphon pipe; and the top end of the control rod is also provided with a limiting device for limiting the control rod to move up and down.

Through adopting above-mentioned technical scheme, when rainy day rainfall is great, afforestation managers can mention the control lever and rotate, makes the closure plate upwards mention and then makes two sections openings dislocation of through-hole and siphon, realizes damming to two sections siphons to separate two adjacent cisterns, the rainwater can not circulate under the effect of siphon. And the pedestrian is less when rainy day, lifts the control lever this moment and not too influence the greenery patches pleasing to the eye, moves down the control lever after the rainfall again and realizes the regulation and storage.

Preferably, the limiting device comprises a long-strip-shaped limiting rod horizontally fixed at the top end of the control rod, a channel matched with the long-strip-shaped limiting rod in shape is formed in the planting soil layer, the limiting rod is clamped and slides in the channel, and when the control rod is lifted and rotates relative to the shutoff plate, the limiting rod and the channel are staggered.

Through adopting above-mentioned technical scheme, set up the passageway that can supply the gag lever post to remove in planting the soil layer, the gag lever post follows the control lever and slides in planting the soil layer joint, because the control lever bottom rotates with the closure plate to be connected, the axis of rotation sets up perpendicularly to when rotating the control lever and making gag lever post and passageway dislocation, the gag lever post supports on planting the soil layer, makes the unable reseing of control lever, and then realizes keeping damming to the siphon.

Preferably, a pump room used for shielding the water suction pump and the circulating pipe is erected above the planting soil layer.

By adopting the technical scheme, the pump room is arranged to shield the water suction pump and the circulating pipe, so that the appearance of the concave green land is improved.

Preferably, the support column in the reservoir includes a plurality of groups and array setting, the top of support column with support steel mesh fixed connection.

Through adopting above-mentioned technical scheme, set up the support column array and be favorable to more stable to the support of supporting the steel mesh to do benefit to both fixedly connected with and avoid supporting the steel mesh to shift or empty.

Preferably, the edge of the supporting steel mesh is fixedly connected with the side wall of the reservoir, and the edge of the supporting steel mesh is pre-buried in the side wall of the reservoir when the side wall of the reservoir is poured.

Through adopting above-mentioned technical scheme, the edge that will support the steel mesh is favorable to further reducing the circumstances that supports the steel mesh and topple over in just pre-buried advance the cistern lateral wall when pouring the cistern lateral wall to it is more stable to support each layer structure of top.

The adjustable storage concave greenbelt with the multilayer grading purification comprises a plurality of independent reservoirs which are built in sequence along the gradient of a road, wherein the elevations of the plurality of reservoirs and the bottoms of the reservoirs are gradually reduced along the gradient of the road, a plurality of supporting columns are arranged in the reservoirs, and a supporting steel mesh, a water permeable supporting plate, a water permeable brick, a first gravel layer, a geotechnical cloth layer, a second gravel layer and a laterite soil layer are laid above the supporting columns in sequence; a planting soil layer which is leveled with a road and is naturally set on a slope and used for planting vegetation is laid above the laterite soil layer of the reservoir; an inverted U-shaped siphon is connected between the adjacent reservoirs, one end of the siphon extends to the bottom of the upstream reservoir, and the other end of the siphon extends to the first gravel layer of the downstream reservoir; wherein the siphon of the reservoir with the lowest topography is connected with a municipal drain pipe.

By adopting the technical scheme, according to the principle of the communicating vessel, when the water level of the upstream reservoir rises to a height higher than the bent part of the siphon pipe, water flows overflow from the siphon pipe to the downstream reservoir, negative pressure is formed in the siphon pipe in the process, so that rainwater in the upstream reservoir can be continuously sucked to the downstream, and because one end of the siphon pipe, which is positioned in the upstream reservoir, extends to the bottom of the reservoir, the upstream adjacent reservoir can be quickly and automatically emptied, so that better water storage capacity can be maintained, and the dryness of the ground can be further maintained. And utilize siphon automatically regulated, compare modes such as current use drain pump, sensor automatically controlled, stability is higher, and the cost is lower, and finally arrange the rainwater to municipal drainage pipe, can keep the drying of planting soil layer top all the time, make rivers can not flow down along slope one-tenth thigh, protected the drying of the lower building of relief and the unblocked of traffic.

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

1. the water storage tanks with the elevations sequentially reduced along the gradient of the road are arranged on two sides of the road, and the support columns, the support steel mesh, the water permeable support plate, the water permeable bricks, the first gravel layer, the geotechnical cloth layer, the second gravel layer, the red soil layer and the planting soil layer are arranged in the water storage tanks from bottom to top, so that the speed of rainwater penetration, the water storage amount and the filtration of downward-seeping rainwater are improved while the soil body above the water storage tanks is supported, the multi-layer graded purification of the rainwater is realized, the recycling value of the rainwater is improved, the ponding of the surface soil layer is reduced, and the influence on low terrain and traffic is reduced;

2. the siphon pipes are communicated between the adjacent water reservoirs, and the circulating pipes provided with the water pumps are communicated above the most downstream water reservoir and the most upstream water reservoir, so that the rainwater in the previous water reservoir can be quickly transferred to the next water reservoir by utilizing the siphon effect when the water level of the previous water reservoir is higher than the elbow height of the siphon pipe, and the water demand of the concave green land positioned outdoors is improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a cross-sectional view of an embodiment of the present application;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a side wall internal cross-sectional view of an embodiment of the present application;

fig. 5 is an enlarged view at B in fig. 4.

Description of reference numerals:

1. a reservoir; 11. a side wall; 12. a cavity; 13. a control lever; 131. a limiting rod; 14. a shutoff plate; 15. a through hole; 21. a support pillar; 22. a support steel mesh; 23. a water permeable support plate; 24. water permeable bricks; 25. a first gravel layer; 26. a geotextile layer; 27. a second gravel layer; 28. a red soil layer; 29. planting a soil layer; 31. a siphon tube; 32. a circulation pipe; 33. municipal drainage pipes; 4. a pump house; 5. a road.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a construction method of a multilayer graded purification adjustable storage concave green land, which comprises the following steps:

as shown in fig. 1 to 2, step one: excavating foundation pits along two sides of the road 5; the pit bottom of the foundation pit extends along the slope of the road 5, so that the slope bottom is parallel to the road 5.

Step two: paving municipal drainage pipes 33 in the foundation pit; municipal drainage pipe 33 extends along the slope at the bottom of the foundation ditch pit, and gravel is filled above municipal drainage pipe 33 after laying is completed.

Step three: building a plurality of independent water reservoirs 1 with gradually lower topography along the gradient of a road 5; the bottom wall and the side wall of the reservoir 1 are both formed by pouring waterproof concrete mortar in a mold-lapping mode, and the inner surface of the reservoir is subjected to waterproof treatment.

As shown in fig. 2 to 3, step four: arranging support columns 21 in the reservoir 1, wherein the support columns 21 can be integrally cast and molded with the reservoir 1 body, the support columns 21 comprise a plurality of groups and are arranged in an array mode, and a support steel mesh 22, a permeable support plate 23, a permeable brick 24, a first gravel layer 25, a geotechnical cloth layer 26, a second gravel layer 27 and a laterite soil layer 28 are sequentially paved above the support columns 21; support steel mesh 22 adopts the reinforcing bar to weld with great ease and forms, and the top and the support steel mesh 22 fixed connection of support column 21 support the edge of steel mesh 22 and the lateral wall fixed connection of cistern 1, will support the edge of steel mesh 22 and bury in advance the lateral wall of cistern 1 when pouring cistern 1 lateral wall. Thereby improving the overall connection strength of the support steel mesh 22 and reducing the overturning or collapsing of the support steel mesh 22.

Step five: and a planting soil layer 29 which is leveled with the road 5 and is naturally set on a slope is laid above the laterite soil layer 28 of each reservoir 1, and vegetation is planted on the planting soil layer 29, wherein the vegetation can be manila grass and the like.

As shown in fig. 2 and 4, the bottom of each reservoir 1 is horizontally disposed, the bottom of each adjacent reservoir 1 is gradually lowered along the slope of the road 5, and the same side wall 11 is shared between the adjacent reservoirs 1, so that the amount of concrete can be reduced. A siphon tube 31 is connected between the adjacent reservoirs 1, the siphon tube 31 is in an inverted U shape, the bent part of the siphon tube 31 penetrates through the side wall 11, one end of the siphon tube 31 extends to the bottom of the upstream reservoir 1, and the other end of the siphon tube 31 extends into the first gravel layer 25 of the downstream reservoir 1; wherein the siphon 31 of the reservoir 1 with the lowest topography extends out of one end of the reservoir 1 and is connected with a municipal drainage pipe 33. The communication of the siphon 31 towards one end of the downstream reservoir 1 to the first gravel layer 25 facilitates the re-filtration of the rainwater in the reservoir 1 through the first gravel layer 25, so that the rainwater is purified in stages, and the rainwater in the most downstream reservoir 1 is relatively clean.

According to the principle of the communicating vessel, when the water level of the upstream reservoir 1 rises to a height higher than the bending position of the siphon tube 31, the water flow overflows from the siphon tube 31 to the downstream reservoir 1, in the process, negative pressure is formed in the siphon tube 31, so that rainwater in the upstream reservoir 1 can be continuously sucked to the downstream, and because one end of the siphon tube 31 positioned in the upstream reservoir 1 extends to the bottom of the pool, the upstream adjacent reservoir 1 can be quickly and automatically emptied, so that better water storage capacity can be maintained, and the ground can be kept dry. And the siphon 31 is used for automatic adjustment, so that compared with the existing modes of using a drainage pump, a sensor for electric control and the like, the stability is higher, and the cost is lower. Wherein, a cut-off mechanism for blocking the siphon 31 is arranged on the side wall 11.

As shown in fig. 4 to 5, the intercepting mechanism includes a cavity 12 formed in the side wall 11, a control rod 13 is slidably connected to the side wall 11 up and down, a lower end of the control rod 13 is rotatably connected to an intercepting plate 14 which is slidably connected to the cavity 12 up and down, the intercepting plate 14 cannot rotate under the clamping action of the cavity 12, the edge of the intercepting plate is in sealing contact with the cavity 12, and a rotation axis of the control rod 13 is vertically arranged. The single siphon 31 is divided into two sections at the bending part, the openings of the two sections of the siphon 31 are communicated with the cavity 12, the openings of the two sections of the siphon 31 are opposite and attached to the intercepting plate 14, and the two sections of the siphon 31 are blocked and intercepted through the intercepting plate 14. Wherein, the cut-off plate 14 is provided with a through hole 15 for conducting two sections of the siphon tube 31, when the control rod 13 is lifted, the through hole 15 and the siphon tube 31 are staggered, thereby realizing cut-off. The top end of the control rod 13 is also provided with a limiting device for limiting the control rod 13 to move up and down.

As shown in fig. 4 to 5, the limiting device includes an elongated limiting rod 131 horizontally fixed on the top end of the control rod 13, the planting soil layer 29 is provided with a channel matched with the elongated rod in shape, when the control rod 13 moves up and down, the limiting rod 131 is clamped and slides in the channel and limits the control rod 13 to be incapable of rotating, when the control rod 13 is lifted until the limiting rod 131 is higher than the ground surface and breaks away from the channel, the control rod 13 can rotate around the axis and make the limiting rod 131 misplaced with the channel, when the control rod 13 is lifted and rotates relative to the intercepting plate 14, the limiting rod 131 misplaces with the channel and is supported on the ground surface, so that the control rod 13 cannot descend, and at this time, the through hole 15 of the intercepting plate 14 misplaces with two sections of the siphon 31 to block the siphon 31.

As shown in fig. 2 and 4, the bottom of the reservoir 1 with the lowest topography is further communicated with a circulating pipe 32, the other end of the circulating pipe 32 extends to the upper side of the reservoir 1 with the highest topography and extends out of the planting soil layer 29, a water suction pump is mounted on the circulating pipe 32, when the water suction pump is started, rainwater in the reservoir 1 with the lowest topography is sucked to the planting soil above the reservoir 1 with the highest topography, and the rainwater is recycled under the condition that the rainfall does not occur for a plurality of days. And a pump room 4 for shielding the water pump and the circulating pipe 32 is also arranged above the planting soil layer 29, so that the overall attractiveness of the concave green land is improved.

As shown in fig. 1 to 2, the embodiment of the application discloses multilayer hierarchical purification's adjustable recessed greenery patches that hold, including a plurality of independent cistern 1 of building in proper order along the 5 slopes of road, the elevation and the bottom of the pool of a plurality of cistern 1 reduce along the 5 slopes of road gradually, and diapire, the lateral wall of cistern 1 all adopt waterproof concrete mortar to build the mould and pour and form, and the water repellent is done to the internal surface.

A plurality of support columns 21 are arranged in the reservoir 1, the support columns 21 can be integrally cast with the reservoir 1 body, and a support steel mesh 22, a water permeable support plate 23, a water permeable brick 24, a first gravel layer 25, a geotechnical cloth layer 26, a second gravel layer 27 and a laterite soil layer 28 are sequentially laid above the support columns 21; a planting soil layer 29 which is leveled with the road 5 and naturally slopes for planting vegetation is laid above the laterite layer 28 of the reservoir 1. Support steel mesh 22 adopts the reinforcing bar to weld with great ease and forms, and the top and the support steel mesh 22 fixed connection of support column 21 support the edge of steel mesh 22 and the lateral wall fixed connection of cistern 1, will support the edge of steel mesh 22 and bury in advance the lateral wall of cistern 1 when pouring cistern 1 lateral wall. Thereby improving the overall connection strength of the support steel mesh 22 and reducing the overturning or collapsing of the support steel mesh 22.

An inverted U-shaped siphon tube 31 is connected between the adjacent reservoirs 1, one end of the siphon tube 31 extends to the bottom of the upstream reservoir 1, and the other end extends to the first gravel layer 25 of the downstream reservoir 1; wherein the siphon 31 of the reservoir 1 with the lowest topography is connected to the municipal drain 33.

And a planting soil layer 29 which is leveled with the road 5 and is naturally set on a slope is laid above the laterite soil layer 28 of each reservoir 1, and vegetation is planted on the planting soil layer 29, wherein the vegetation can be manila grass and the like.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A construction method of multi-layer graded purified storage-adjustable concave green land is characterized by comprising the following steps: the method comprises the following steps:

the method comprises the following steps: excavating foundation pits along two sides of the road (5);

step two: laying municipal drainage pipes (33) in the foundation pit;

step three: a plurality of independent water reservoirs (1) with gradually lower topography are built along the gradient of the road (5);

step four: arranging a support pillar (21) in the reservoir (1), and paving a support steel mesh (22), a water permeable support plate (23), a water permeable brick (24), a first gravel layer (25), a geotechnical cloth layer (26), a second gravel layer (27) and a laterite layer (28) above the support pillar (21) in sequence;

step five: a planting soil layer (29) which is leveled with the road (5) and is naturally set on the slope is paved above the laterite soil layer (28) of each reservoir (1), and vegetation is planted on the planting soil layer (29);

the pond bottom of the adjacent impounding ponds (1) is gradually reduced along the gradient of the road (5), a siphon (31) is connected between the adjacent impounding ponds (1), the siphon (31) is in an inverted U shape, one end of the siphon (31) extends to the pond bottom of the upstream impounding pond (1), and the other end of the siphon extends into the first gravel layer (25) of the downstream impounding pond (1); wherein, the siphon (31) of the reservoir (1) with the lowest terrain extends out of one end of the reservoir (1) to be connected with a municipal drainage pipe (33).

2. The method for constructing a multi-layer graded purified adjustable storage concave green space as claimed in claim 1, wherein: the topography is lowest the bottom of the pool of cistern (1) still communicates there is circulating pipe (32), the other end of circulating pipe (32) extends to the topography is highest the top of cistern (1) and stretch out planting soil layer (29), the suction pump is installed in circulating pipe (32).

3. The method for constructing a multi-layer graded purified adjustable storage concave green space as claimed in claim 1, wherein: it is adjacent the same side wall (11) of sharing between cistern (1), siphon (31) run through side wall (11), it is right to be provided with on side wall (11) be used for siphon (31) carry out the mechanism that dams.

4. The method for constructing a multi-layer graded-purification concave-storage-adjustable green land as claimed in claim 3, wherein: the intercepting mechanism comprises a cavity (12) formed in a side wall (11), a control rod (13) is connected in the side wall (11) in a vertical sliding mode, the lower end of the control rod (13) is rotatably connected with an intercepting plate (14) which is connected in the cavity (12) in a vertical clamping mode in a sliding mode, the siphon tube (31) is divided into two sections, openings of the two sections of the siphon tube (31) are communicated with the cavity (12), the openings of the two sections of the siphon tube (31) are opposite to each other and are attached to the intercepting plate (14), and through holes (15) for conducting the two sections of the siphon tube (31) are formed in the intercepting plate (14); when the control rod (13) is lifted, the through hole (15) is dislocated with the siphon (31); and the top end of the control rod (13) is also provided with a limiting device for limiting the control rod (13) to move up and down.

5. The method for constructing a multi-layer graded purified adjustable storage concave green space as claimed in claim 4, wherein: stop device is including the level fix rectangular shape gag lever post (131) on control lever (13) top, plant soil layer (29) and offer with rectangular shape of the pole matched with passageway, gag lever post (131) are in joint slides in the passageway, work as control lever (13) are mentioned and are relative when closure plate (14) rotated, gag lever post (131) with the passageway dislocation.

6. The method for constructing a multi-layer graded-purification concave-storage-adjustable green land as claimed in claim 2, wherein: and a pump room (4) for shielding the water suction pump and the circulating pipe (32) is erected above the planting soil layer (29).

7. The method for constructing a multi-layer graded purified adjustable storage concave green space as claimed in claim 1, wherein: support column (21) in cistern (1) include a plurality of groups and array setting, the top of support column (21) with support steel mesh (22) fixed connection.

8. The method for constructing a multi-layer graded purified adjustable storage concave green space as claimed in claim 1, wherein: the edge of the supporting steel mesh (22) is fixedly connected with the side wall of the reservoir (1), and the edge of the supporting steel mesh (22) is pre-buried into the side wall of the reservoir (1) when the side wall of the reservoir (1) is poured.

9. A multi-layer graded clean, adjustable storage green space, produced by the method of any one of claims 1 to 8, wherein: the water-permeable concrete water-retaining device comprises a plurality of independent water reservoirs (1) which are built in sequence along the gradient of a road (5), wherein the elevation and the pool bottom of the water reservoirs (1) are gradually reduced along the gradient of the road (5), a plurality of supporting columns (21) are arranged in the water reservoirs (1), and supporting steel nets (22), water-permeable supporting plates (23), water-permeable bricks (24), a first gravel layer (25), a geotechnical cloth layer (26), a second gravel layer (27) and a laterite soil layer (28) are laid above the supporting columns (21) in sequence; a planting soil layer (29) which is leveled with the road (5) and is naturally set on the slope and used for planting the vegetation is laid above the laterite soil layer (28) of the reservoir (1); an inverted U-shaped siphon tube (31) is connected between the adjacent reservoirs (1), one end of the siphon tube (31) extends to the bottom of the upstream reservoir (1), and the other end of the siphon tube extends to the first gravel layer (25) of the downstream reservoir (1); wherein the siphon (31) of the reservoir (1) with the lowest topography is connected to a municipal drain (33).