CN111636537A

CN111636537A - Black and odorous water body river course slope sponge transformation system

Info

Publication number: CN111636537A
Application number: CN202010313800.4A
Authority: CN
Inventors: 李智; 夏颖; 易新虎; 郑涛; 廖红玉; 王金龙
Original assignee: China First Metallurgical Group Co Ltd
Current assignee: China First Metallurgical Group Co Ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-09-08

Abstract

The invention provides a black and odorous water body riverway side slope sponge transformation system, which comprises: a rain garden and a multi-stage wetland downstream thereof; the rainwater garden comprises: a foundation pit and a drainage system; tamping the foundation pit with plain soil; the drainage system is arranged in the foundation pit and used for collecting and discharging rainwater; the upstream side of the drainage system is provided with a gravel layer, a bean gravel layer, a coarse sand layer, a medium soil layer and a first soil covering layer from bottom to top in sequence; the downstream side of the drainage system is filled with a second soil covering layer; the multi-stage wetland is communicated with a water outlet of the drainage system to filter and purify the drained water. According to the invention, through the upstream rainwater garden, rainwater discharge is reduced, peripheral pipe networks, structures and water bodies are protected, and waste of water resources is reduced; the rainwater is filtered and purified in multiple stages through the rainwater garden and the multiple stages of wetlands, so that non-point source pollution is reduced, and the self-cleaning pressure of a river channel is reduced; the utilization rate of water resources is improved, and meanwhile, a certain attractive effect is achieved on the side slope.

Description

Black and odorous water body river course slope sponge transformation system

Technical Field

The invention relates to the technical field of municipal construction, in particular to a black and odorous water river slope sponge transformation system.

Background

With the national emphasis on projects such as city infrastructure, underground comprehensive pipe gallery and water environment treatment, more and more cities take the water environment treatment as the first major thing. The rapid development of the urbanization process in China causes the natural permeability of the earth surface to be continuously reduced, most of urban rainfall can be discharged only through ground runoff, and the ground runoff of cities is continuously increased. The rain dissolves air pollutants, so that a large amount of pollutants are carried in the rain, and the pollutants cause serious non-point source pollution to cities, so that the urban water environment is continuously deteriorated, and the demand of residents on water sources is continuously increased along with the continuous improvement of urbanization and the continuous increase of population, so that the urban water resource shortage is increasingly serious.

Sponge urban area rainwater among the prior art is collected and is purified regulation ecological utilization system and only improved to the drainage, does not have certain aesthetic property, and the cost is higher moreover, does not have abundant utilization to the water resource, administers to the river course sponge and does not have qualitative change more.

Disclosure of Invention

In view of the above, the invention provides a black and odorous water body riverway slope sponge transformation system, and aims to fully utilize and purify water resources so as to reduce the self-purification pressure of the riverway and achieve a certain landscape effect.

In one aspect, the invention provides a black and odorous water body riverway slope sponge transformation system, which comprises: a rain garden and a multi-stage wetland downstream thereof; wherein the storm water garden comprises: a foundation pit and a drainage system; wherein the foundation pit is tamped by using plain soil; the drainage system is arranged in the foundation pit and used for collecting and discharging rainwater; the upstream side of the drainage system is sequentially filled with a gravel layer, a pea gravel layer, a coarse sand layer, a medium soil layer and a first soil covering layer from bottom to top; the downstream side of the drainage system is filled with a second soil covering layer; the multi-stage wetland is communicated with a water outlet of the drainage system and is used for filtering and purifying water discharged by the drainage system.

Further, among the above-mentioned black smelly water river course slope sponge transformation system, drainage system includes: catch basins and drains; wherein, the concrete bedding has been laid to the bottom of rainwater well, the drain pipe lay in concrete bedding top just the drain pipe extends to the downstream side, drainage system's downstream side is filled has the second overburden layer, and this second overburden layer is located in the region of drain pipe top.

Further, in the above-mentioned black and odorous water river course slope sponge transformation system, the thickness of second overburden layer is more than or equal to 600 mm.

Further, in the black and odorous water body river course slope sponge transformation system, a rainwater overflow port is arranged at the top of the rainwater well.

Further, in the sponge reforming system for the black and odorous water river channel side slope, the thickness of the gravel layer is 260-310mm, and the particle size of the gravel is 20-35 mm; the thickness of the pea gravel layer is 40-60mm, and the particle size of the pea gravel is 5-10 mm; the thickness of the coarse sand layer is 40-60 mm.

Further, in the above-mentioned black and odorous water body river course slope sponge transformation system, multistage wetland includes: the multistage wetland units are sequentially connected in series from upstream to downstream; wherein,

the two adjacent wetland units are separated by a partition wall; and green plants and crushed stone layers with different grain sizes are sequentially distributed in each wetland unit from top to bottom.

Further, in the above-mentioned black and odorous water river course side slope sponge transformation system, every the wetland unit is terminal separate the barricade on all seted up the overflow mouth, arbitrary adjacent two the overflow mouth sets up in a staggered way each other, the last one-level the last overflow mouth of wetland unit inserts the river course side slope after the transformation.

Furthermore, in the sponge reformation system for the black and odorous water river slope, the top layer of the wetland unit, which is close to the water outlet of the drainage system, is scattered with a gravel layer for reducing the scouring force of water.

Further, in the sponge reformation system for the black and odorous water river channel side slope, three layers of gravel layers are arranged from the bottom to the top in the wetland unit, the particle size of the gravel in the bottom gravel layer is 25-35mm, the particle size of the gravel in the middle gravel layer is 15-25mm, and the particle size of the gravel in the top gravel layer is 10-15 mm.

Further, in the sponge reformation system for the black and odorous water river channel side slope, the multi-stage wetland is formed by connecting three stages of wetland units in series, the first stage of wetland unit and the second stage of wetland unit are positioned at the upstream and are aligned with each other; the depth of the wetland unit at the downstream third stage is greater than that of the wetland units at the previous two stages.

According to the invention, through the upstream rainwater garden, rainwater discharge is reduced, peripheral pipe networks, structures and water bodies are protected, and waste of water resources is reduced; the rainwater is filtered and purified in multiple stages through the rainwater garden and the multiple stages of wetlands, so that non-point source pollution is reduced, and the self-cleaning pressure of a river channel is reduced; in addition, the rainwater garden is combined with the multi-stage wetland, so that the water resource utilization rate is improved, the environment of the whole river channel is improved, and a good landscape effect is achieved.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of a rainwater garden in a black and odorous water river slope sponge modification system provided by an embodiment of the invention;

fig. 2 is a schematic structural diagram of a multi-stage wetland in a black and odorous water river slope sponge modification system provided by the embodiment of the invention;

fig. 3 is a plan view of the multistage wetland in fig. 2.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1, the system for reforming black and odorous water body riverway side slope sponge in the embodiment of the invention comprises: a rain garden and a multi-stage wetland downstream thereof; wherein the storm water garden comprises: a foundation pit 1 and a drainage system 2; wherein the foundation pit 1 is tamped by adopting plain soil 11; the drainage system 2 is arranged in the foundation pit and used for collecting and discharging rainwater; the upstream side of the drainage system 2 is sequentially filled with a gravel layer 3, a bean gravel layer 4, a coarse sand layer 5, a medium soil layer 6 and a first soil covering layer 7 from bottom to top; the downstream side of the drainage system 2 is filled with a second cover soil layer 8; the multi-stage wetland is communicated with a water outlet of the drainage system 2 and is used for filtering and purifying water discharged by the drainage system 2.

Specifically, in practice, after the drainage direction is determined according to the terrain, the arrangement positions of the rainwater garden and the multi-stage wetland are determined, and the rainwater garden is kept at the upstream and the multi-stage wetland is kept at the downstream. The size of the foundation pit of the rainwater garden can be determined according to actual needs, and the foundation pit is tamped by adopting plain soil 11 after being excavated. A rainwater collecting unit and a drainage unit may be provided in the drainage system 2 to collect and drain rainwater to a subsequent system; the multi-stage wetland can be communicated with the drainage system 2 through the drainage unit. The bottom of the drainage system 2 may be provided with a concrete pad 23, such as a C15 pad.

The upstream side of the drainage system 2 is filled with a gravel layer 3, which can play a role in purifying water quality and can also retain underground water. In this embodiment, the thickness of the gravel layer 3 is 260-310mm, preferably 300 mm; the particle size of the gravel is 20-35 mm.

The pea gravel layer 4 and the coarse sand layer 5 can prevent the soil from being washed after upstream rainwater is collected, so that the soil medium in the medium soil layer 6 is lost. In the embodiment, the thickness of the gravel pack 4 is 40-60mm, preferably 50 mm; the particle diameter of the pea gravel is 5-10 mm. The thickness of the coarse sand layer 5 is 40-60mm, preferably 50 mm.

The vegetation 200 is planted at the upstream and downstream of the drainage system 2, the medium soil layer 6, the first soil covering layer 7 and the second soil covering layer 8 provide nutrients for the vegetation 200, the first soil covering layer 7 and the second soil covering layer 8 cover the top surface layer after the vegetation 200 is planted, rainwater can be intercepted and purified through the vegetation 200 and soil, and the rainwater amount directly drained into a river channel through a side slope is reduced.

The multi-stage wetland can be used for filtering and purifying rainwater discharged from the rainwater garden step by step, and the rainwater is collected, discharged, filtered and purified by combining the rainwater garden and the multi-stage wetland, so that runoff rainfall is fully utilized, all vegetation 200 and underground water are conserved, and the shortage of water resources is relieved.

The above obviously shows that the sponge reforming system for the black and odorous water riverway side slope provided by the embodiment reduces rainwater discharge through the upstream rainwater garden, protects peripheral pipe networks, structures and water bodies, and reduces waste of water resources; the rainwater is filtered and purified in multiple stages through the rainwater garden and the multiple stages of wetlands, so that non-point source pollution is reduced, and the self-cleaning pressure of a river channel is reduced; in addition, the rainwater garden is combined with the multi-stage wetland, so that the water resource utilization rate is improved, the environment of the whole river channel is improved, and a good landscape effect is achieved.

With continued reference to fig. 1, in the above embodiment, the drainage system 2 includes: a catch basin 21 and a drain pipe 22; wherein, the bottom of rainwater well 21 has laid concrete cushion 23, drain pipe 22 lay in concrete cushion 23 top just drain pipe 22 extends to the downstream side, the downstream side of drainage system 2 is filled with second overburden 8, and this second overburden 8 is located in the region of drain pipe 22 top.

Specifically, the well wall 211 of the catch basin 21 is constructed by using bricks, and the bricks are coated by using cement mortar. The top of the well wall 211 can be stepped, so that the overflow speed of rainwater can be reduced. The bottom of the shaft wall 211 near the upstream side contacts the concrete pad 23 and the bottom of the shaft wall 211 near the downstream side contacts the drain pipe 22. The brick body can be an MU10 brick, and the cement mortar can be cement mortar with the ratio of cement to sand being 1: 2.

The rainwater overflow port 212 is arranged at the top of the rainwater well 21. For the sake of beauty, a transparent well cover (not shown in the figure) may be provided with a rainwater overflow port 212, and the diameter of the transparent well cover may be 700 mm. In this embodiment, rainwater well 21 both sides are planted and are had vegetation 200, can utilize plant, overflow inlet for stom water, soil etc. to cut off, the infiltration purifies the rainwater, has cut down the non-point source pollution, has reduced the direct rainfall volume of discharging into the river course through the side slope, through the collection of rainwater overflow mouth 212, and multistage filtration, purification have reduced the self-purification pressure in river course in advance.

In fact, a well seat (not shown in the figure) can be arranged at the well mouth of the rainwater well 21, a groove is formed in the well seat, a rotating seat matched with the groove is formed in the transparent well cover, and the transparent well cover and the well seat can be connected through the rotating seat. Transparent well lid can be enclosed by well lid base, well lid top and center and constitutes, and through the grid strip fixed connection that a plurality of intervals set up between well lid base and the well lid top circle, through the grid strip fixed connection that a plurality of intervals set up between well lid top circle and the center circle, can form rainwater overflow mouth 212 between each grid strip.

The drain pipe 22 is buried above the mat at the bottom of the catch basin 21, and the direction indicated by the arrow in fig. 1 is the direction of the drain pipe 22, i.e., the direction of water discharge. The pipe diameter of the drain pipe 22 can be determined according to actual requirements, for example, the pipe diameter can be 400 mm.

Vegetation 200 is planted on the downstream side of the drainage system 2, a second soil covering layer 8 is laid after the vegetation 200 is planted, and the thickness of the second soil covering layer 8 is larger than or equal to 600 mm. In this embodiment, the second soil cover layer 8 is the same as the first soil cover layer 7 in covering soil.

Referring to fig. 2 and 3, the multistage wetland comprises: the multistage wetland units 9 are sequentially connected in series from upstream to downstream; wherein, two adjacent wetland units 9 are separated by a separating wall 92; the vegetation 200 and the gravel layers with different grain diameters are sequentially distributed in each wetland unit 9 from top to bottom.

Specifically, the wetland unit 9 is a tank body with an open top, the tank body is constructed by a concrete structure 91, and vegetation 200 is planted in the tank body. Three layers of crushed stone layers are arranged from the bottom to the top in the wetland unit 9, the particle size of the crushed stone in the bottom crushed stone layer 94 is 25-35mm, the particle size of the crushed stone in the middle crushed stone layer 95 is 15-25mm, and the particle size of the crushed stone in the top crushed stone layer 96 is 10-15 mm.

In order to reduce the scouring force of water, a gravel scattering layer 90 is arranged at the top layer of the wetland unit 9 close to the water outlet of the drainage system 2. Gravel can be scattered in the wetland unit 9 right below the outlet of the drain pipe 22 of the drainage system 2, the size of the gravel scattered layer can be arranged according to the length of 2 meters and the width of 0.8 meter, and the gravel scattered layer can be adjusted according to actual requirements.

Every 9 terminal wetland units 9 separate on the barricade 92 all seted up overflow mouth 93, arbitrary adjacent two the overflow mouth 93 sets up in a staggered way each other, the last one-level the last overflow mouth 93 on the wetland unit 9 inserts the river course slope after the transformation. The overflow ports 93 are arranged in a staggered manner, so that the overflow speed of water flow can be reduced, and the flushing of the vegetation 200 is reduced. Because each wetland unit 9 is a tank body built by concrete, every two adjacent tank bodies share one side wall, and the shared side wall forms a partition wall 92. An overflow port 93 positioned at the tail end of the wetland is connected into the river channel, and the water filtered and purified layer by layer is discharged into the river channel, so that the self-purification pressure of the river channel is further reduced.

Preferably, in this embodiment, the multistage wetland is formed by connecting three stages of wetland units 9 in series, and the first stage of wetland unit 9 and the second stage of wetland unit 9 are located at the upstream and are flush with each other; the depth of the wetland unit 9 at the downstream third stage is greater than that of the wetland units 9 at the previous two stages. The sectional area of the third stage wetland can be smaller than that of the first two stages of wetland units 9. Gravel scattering layer 90 is laid at the position corresponding to the outlet of the first-stage wetland unit 9 and the drain pipe 22, so that rainwater is filtered and purified step by step through the multi-stage structure, the attractive effect of the wetland is preserved, and the multi-stage purification effect is also achieved.

The construction method of the black and odorous water river slope sponge transformation system comprises the following steps:

(1) after the position of an upstream rainwater garden is determined according to the terrain, a foundation pit is excavated, plain soil 11 is tamped, a concrete cushion 23 is poured at the bottom of the drainage system 2, a drainage pipe 22 is laid above the concrete, a rainwater well 21 is built, and a rainwater overflow port 212 is arranged at the top of the rainwater well 21;

(2) sequentially filling a gravel layer 3, a bean gravel layer 4, a coarse sand layer 5 and a medium soil layer 6 on the upstream side of the drainage system 2 from bottom to top; after the vegetation 200 is planted, a first covering soil layer 7 is paved on the top surface layer;

(3) and determining the positions of the multistage wetlands according to the positions of the drain pipes 22 reserved at the upstream and the river channel side slopes, and pouring concrete after excavating the stratum to form the multistage wetland units 9.

In conclusion, the sponge reformation system for the black and odorous water riverway side slope reduces rainwater discharge through the upstream rainwater garden, protects peripheral pipe networks, structures and water bodies, and reduces waste of water resources; the rainwater is filtered and purified in multiple stages through the rainwater garden and the multiple stages of wetlands, so that non-point source pollution is reduced, and the self-cleaning pressure of a river channel is reduced; in addition, the rainwater garden is combined with the multi-stage wetland, so that the water resource utilization rate is improved, and a certain attractive effect is achieved on the side slope.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a black and odorous water body river course slope sponge transformation system which characterized in that includes: a rain garden and a multi-stage wetland downstream thereof; wherein,

the rainwater garden comprises: a foundation pit and a drainage system; wherein the foundation pit is tamped by using plain soil; the drainage system is arranged in the foundation pit and used for collecting and discharging rainwater; the upstream side of the drainage system is sequentially filled with a gravel layer, a pea gravel layer, a coarse sand layer, a medium soil layer and a first soil covering layer from bottom to top; the downstream side of the drainage system is filled with a second soil covering layer;

the multi-stage wetland is communicated with a water outlet of the drainage system and is used for filtering and purifying water discharged by the drainage system.

2. The black and odorous water river slope sponge reforming system according to claim 1, wherein the drainage system comprises: catch basins and drains; wherein,

the rainwater well is characterized in that a concrete cushion is laid at the bottom of the rainwater well, the drainage pipe is laid above the concrete cushion and extends towards the downstream side, a second covering soil layer is filled at the downstream side of the drainage system, and the second covering soil layer is located in the area above the drainage pipe.

3. The black and odorous water river course side slope sponge transformation system of claim 2, wherein the thickness of the second cover soil layer is greater than or equal to 600 mm.

4. The black and odorous water river slope sponge reforming system according to claim 2, wherein a rainwater overflow port is arranged at the top of the rainwater well.

5. The sponge reforming system for the black and odorous water river course slope according to claim 1, wherein the thickness of the gravel layer is 260-310mm, and the particle size of the gravel is 20-35 mm; the thickness of the pea gravel layer is 40-60mm, and the particle size of the pea gravel is 5-10 mm; the thickness of the coarse sand layer is 40-60 mm.

6. The black and odorous water body river course side slope sponge transformation system of any one of claims 1 to 5, wherein the multistage wetland comprises: the multistage wetland units are sequentially connected in series from upstream to downstream; wherein,

7. The black and odorous water river slope sponge reforming system according to claim 5, wherein overflow ports are formed in the retaining wall at the tail end of each wetland unit, any two adjacent overflow ports are arranged in a staggered mode, and the overflow ports in the last stage of wetland unit are connected to the reformed river slope.

8. The black and odorous water river slope sponge reforming system as claimed in claim 5, wherein a gravel layer is scattered on the top layer of the wetland unit close to the water outlet of the drainage system to reduce the scouring force of water.

9. The black and odorous water river slope sponge reformation system of claim 5, wherein the wetland unit is provided with three layers of crushed stone layers from bottom to top, the crushed stone particle size in the bottom crushed stone layer is 25-35mm, the crushed stone particle size in the middle crushed stone layer is 15-25mm, and the crushed stone particle size in the top crushed stone layer is 10-15 mm.

10. The black and odorous water river slope sponge reforming system according to claim 5, wherein the multi-stage wetland is formed by connecting three stages of wetland units in series, and the first stage wetland unit and the second stage wetland unit are positioned at the upstream and are level to each other; the depth of the wetland unit at the downstream third stage is greater than that of the wetland units at the previous two stages.