CN111321800B

CN111321800B - Water seepage and flood drainage system based on sponge city

Info

Publication number: CN111321800B
Application number: CN202010148297.1A
Authority: CN
Inventors: 林志博; 林晓鹏
Original assignee: Shenzhen Huasheng Construction Group Co ltd
Current assignee: Shenzhen Huasheng Construction Group Co ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2021-06-01
Anticipated expiration: 2040-03-05
Also published as: CN111321800A

Abstract

The invention relates to a water seepage and flood drainage system based on a sponge city, which comprises a water storage tank arranged below a road inspection well, wherein a water inlet on the top surface of the water storage tank is communicated with a water leakage port on the bottom surface of a road inspection well through a communicating cavity, a coarse filter screen is arranged in the water leakage port, and a fine filter screen is arranged in the water inlet; the bottom of the water storage tank is provided with a water suction pump, a water outlet of the water suction pump is communicated with a landscape lake of the city park through a water suction pipe, a suspended layer is arranged below a ground layer surrounding the landscape lake and is communicated with the landscape lake, a supporting plate is fixedly connected to the edge, close to the landscape lake, of the supporting plate and used for supporting a planting layer and a water storage layer, supporting columns are supported below the supporting plate, landscape plants are planted on the planting layer, and vertical water permeable holes are distributed in the supporting plate. The invention can effectively store rainwater, purify and reutilize the rainwater and provide more water resources for urban parks.

Description

Water seepage and flood drainage system based on sponge city

Technical Field

The invention relates to the technical field of drainage engineering, in particular to a water seepage and flood drainage system based on a sponge city.

Background

At present, with the advance of urbanization process in China, the whole scale of a city is continuously expanded, and the ground hardening of the city is intensified, so that the runoff coefficient of rainwater is increased. In rainstorm weather, water is easy to accumulate on the road surface, and traffic paralysis and casualties of urban roads are easy to cause in severe weather. The sponge city is a city which can be like a sponge and has good elasticity in the aspects of adapting to environmental changes, coping with natural disasters caused by rainwater and the like, and can also be called as a water elasticity city. Because extreme weather is frequent in China, the waterlogging phenomenon generally exists in many cities after heavy rainfall. The concept of sponge cities is more and more concerned about solving urban inland inundation and is continuously written into construction planning.

In recent years, submerged greenbelts, permeable ponds, wet ponds and the like have attracted attention and are rapidly constructed, and due to the large using amount and high manufacturing cost of the filler, the filler plays a certain acceleration role in rainwater infiltration, but is difficult to effectively store rainwater, purify and utilize the rainwater. The traditional Chinese patent with publication number CN106337484B discloses a water seepage and flood drainage system based on a sponge city, which comprises an artificial wetland, wherein the artificial wetland is connected with a cache pool through a second water pipe, and the cache pool is connected with a river channel through a first water pipe; the artificial wetland is sequentially provided with a disinfection layer, a first isolation layer, a water storage layer and a planting layer from bottom to top.

The above prior art solutions have the following drawbacks: the implementation of the whole technical scheme needs to match the artificial wetland and the river channel, and the construction of the artificial wetland and the river channel depends on the requirements of specific geographical environment conditions, so that the method is not suitable for some regions or cities, and the cost of engineering cost is high. Research and development and design of a water seepage and flood drainage system which is efficient and can continuously ensure rainwater to seep, store, purify and recycle are particularly necessary for the construction of sponge cities, and meanwhile, the system can be suitable for natural geographic environments of different regions or cities.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a water seepage and flood drainage system based on a sponge city, which can effectively store rainwater, effectively purify and reutilize the rainwater and provide more water resources for city parks.

The above object of the present invention is achieved by the following technical solutions:

a water seepage and flood drainage system based on a sponge city comprises a water storage tank arranged below a road inspection well, wherein a water inlet is formed in the top surface of the water storage tank, a water leakage port corresponding to the water inlet is formed in the bottom surface of the road inspection well, the water inlet in the top surface of the water storage tank is communicated with the water leakage port in the bottom surface of the road inspection well through a communication cavity, a coarse filter screen is installed in the water leakage port, and a fine filter screen is installed in the water inlet; the water storage tank is characterized in that a water suction pump is arranged at the bottom of the water storage tank, a water outlet of the water suction pump is communicated with a landscape lake of the city park through a water suction pipe, a suspended layer is arranged below a ground layer surrounding the landscape lake and is communicated with the landscape lake, the ground layer is divided into a planting layer on the upper portion, a water storage layer in the middle portion and a bearing plate on the lower portion, a supporting plate used for supporting the planting layer and the water storage layer is fixedly connected to the edge of the bearing plate close to the landscape lake, a supporting column is supported below the bearing plate, the lower end of the supporting column extends into the bottom surface of the suspended layer, landscape plants are planted on the planting layer, and vertical water permeable holes are distributed in the bearing.

By adopting the technical scheme, rainwater entering the road inspection well respectively passes through the water leakage port on the bottom surface of the road inspection well, the communicating cavity and the water inlet on the top surface of the water storage tank, and is gradually collected in the water storage tank for storing rainwater under the double filtering action of the coarse filtering net and the fine filtering of the fine filtering net, impurities in the rainwater stored in the water storage tank are gradually deposited on the bottom surface of the water storage tank through sedimentation, and the water suction pump is started to pump the water stored in the water storage tank into a landscape lake of a city park. A suspended layer is wound on the periphery of the landscape lake, a ground layer capable of planting landscape plants is arranged above the suspended layer, and the suspended layer can contain more rainwater, so that the water storage capacity of the landscape lake is enlarged, the pressure of waterlogging on an urban road after rainfall is solved, and the rainwater stored in the landscape lake can be reused; meanwhile, the ground layer is divided into an upper planting layer, a middle water storage layer and a lower bearing plate, the water storage layer can be used for storing moisture required by plant growth, meanwhile, the water storage layer can supplement moisture from the landscape lake through the permeation effect of the bearing plate or the supporting plate, the supporting columns are supported below the bearing plate, the overall stability of the ground layer surrounding the landscape lake is guaranteed, and the overall attractive effect of the urban park is improved.

The present invention in a preferred example may be further configured to: the cross section of the water storage tank is trapezoidal, the water storage tank is formed by integrally pouring reinforced concrete, the length of the top of the water storage tank is 2-3 m, the length of the bottom of the water storage tank is 3.5-4.5 m, and the height of the water storage tank is 4-6 m.

By adopting the technical scheme, the water storage tank is integrally poured by reinforced concrete, and meanwhile, the cross section of the water storage tank is trapezoidal, so that the overall strength of the water storage tank is improved, and the overall stability of the urban pavement is ensured.

The present invention in a preferred example may be further configured to: the bottom surface of the water storage tank is provided with a sand gathering groove, a sand pump is arranged in the sand gathering groove, and the outlet of the sand pump is connected with a sand pumping pipe extending into the ground.

Through adopting above-mentioned technical scheme, gather the sand recess and be less than the bottom surface of storage water tank, can gather more grit or other impurity, the grit of gathering or other impurity are pumped to the road surface through the sand pump on, carry away after cleaning.

The present invention in a preferred example may be further configured to: the planting layer is a mixture of soil and a plant nutrient substrate, and the weight ratio of the soil to the plant nutrient substrate is (10-12): (1-3).

By adopting the technical scheme, the soil and the plant nutrient medium are prepared into the soil according to a proper proportion, so that the required nutrients are provided for the growth of landscape plants.

The present invention in a preferred example may be further configured to: the water storage layer is prepared from (5-6) by weight: and (3-4) uniformly mixing the fine sand and the coarse sand.

By adopting the technical scheme, the fine sand stone and the coarse sand are uniformly mixed according to a proper proportion to form the water storage layer, so that the required moisture is provided for the growth of landscape plants, and meanwhile, the permeated rainwater can be stored in the water storage layer.

The present invention in a preferred example may be further configured to: the particle size of the fine sand stone is 2-3 cm, and the particle size of the coarse sand is 3-5 mm.

Through adopting above-mentioned technical scheme, selection of fine grain grit and grit particle size for the aquifer forms the retaining structure in many gaps.

The present invention in a preferred example may be further configured to: the bearing plate is formed by casting concrete in a forming mould and solidifying, and the water permeable holes are integrally cast.

Through adopting above-mentioned technical scheme, the bearing board is by concrete casting shaping, and surface distribution integrated into one piece has the hole of permeating water simultaneously, is favorable to guaranteeing the bulk strength and the water permeability of bearing board.

The present invention in a preferred example may be further configured to: and geotextile layers are respectively arranged among the planting layer at the upper part, the water storage layer at the middle part and the bearing plate at the lower part.

By adopting the technical scheme, the geotechnical cloth layer enables the planting layer, the water storage layer and the bearing plate not to run off or be mixed, the whole structure and the function of each part are kept, meanwhile, the geotechnical cloth layer has good air permeability and water permeability, water flow is enabled to pass through, and soil particles, fine sand, small stones and the like are effectively intercepted, so that the stability of water and soil engineering is kept.

The present invention in a preferred example may be further configured to: emergent aquatic plants, submerged plants and floating plants are planted in the landscape lake.

By adopting the technical scheme, the plants planted in the landscape lake can effectively absorb elements such as nitrogen and phosphorus in the water body, play roles in purifying water quality and beautifying the environment, have stronger enrichment and removal effects on other organic matters and heavy metals, improve biological geochemical circulation in the system through the oxygen therapy effect of the root system, absorb partial nutrient substances, reduce pollution load and the like.

The present invention in a preferred example may be further configured to: the end part of the water pumping pipe extending into the landscape lake is bent downwards, the outer side of the end part is covered with a filter cover, and the outer side of the end part of the water pumping pipe is provided with a slope.

By adopting the technical scheme, the filter cover can effectively prevent large-size impurities from entering and blocking the water pumping pipe, and the slope can effectively isolate the end part of the water pumping pipe from the landscape lake so as to be beneficial to the deposition effect of sediments in the landscape lake.

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

1. rainwater entering the road inspection well respectively passes through a water leakage port on the bottom surface of the road inspection well, a communicating cavity and a water inlet on the top surface of a water storage tank, and is gradually collected in the water storage tank for storing the rainwater under the double filtering action of coarse filtering of a coarse filtering net and fine filtering of a fine filtering net, impurities in the rainwater stored in the water storage tank are gradually deposited on the bottom surface of the water storage tank through sedimentation, and a water suction pump is started to pump the water stored in the water storage tank into a landscape lake of an urban park. A suspended layer is wound on the periphery of the landscape lake, a ground layer capable of planting landscape plants is arranged above the suspended layer, and the suspended layer can contain more rainwater, so that the water storage capacity of the landscape lake is enlarged, the pressure of waterlogging on an urban road after rainfall is solved, and the rainwater stored in the landscape lake can be reused; meanwhile, the ground layer is divided into an upper planting layer, a middle water storage layer and a lower bearing plate, the water storage layer can be used for storing moisture required by plant growth, meanwhile, the water storage layer can supplement the moisture from the landscape lake through the permeation effect of the bearing plate or the supporting plate, and a supporting column is supported below the bearing plate, so that the overall stability of the ground layer surrounding the landscape lake is ensured, and the overall aesthetic effect of the city park is improved;

2. the water storage tank is integrally cast by reinforced concrete, and the cross section of the water storage tank is trapezoidal, so that the overall strength of the water storage tank is improved, and the overall stability of an urban road surface is ensured. The sand gathering groove is lower than the bottom surface of the water storage tank, more sand or other impurities can be gathered, and the gathered sand or other impurities are pumped to the road surface through the sand pump and then conveyed away after being cleaned;

3. the plants in the landscape lake can effectively absorb elements such as nitrogen, phosphorus and the like in the water body, play roles in purifying water quality and beautifying the environment, have stronger enrichment and removal roles on other organic matters and heavy metals, improve the biological localization circulation in the system through the oxygen transportation function of the root system, absorb partial nutrient substances, reduce pollution load and the like; the bearing plate is formed by concrete pouring, and the surface of the bearing plate is provided with water permeable holes which are integrally formed, so that the integral strength and the water permeability of the bearing plate are ensured.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention.

FIG. 2 is a schematic view of the connection between a water storage tank and a road inspection well.

FIG. 3 is a schematic structural view of the support plate of the present invention.

Reference numerals: 1. a road inspection well; 2. a water storage tank; 3. a guardrail; 4. a coarse filter screen; 5. a fine-grade filter screen; 6. a communicating cavity; 7. a water pump; 8. a water pumping pipe; 9. a landscape lake; 10. a ground layer; 11. a suspended layer; 12. planting a layer; 13. a aquifer; 14. a support plate; 15. supporting the guard plate; 16. a support pillar; 17. landscape plants; 18. water permeable holes; 19. a sand gathering groove; 20. a sand pump; 21. a sand pumping pipe; 22. a slope; 23. and (6) a filter cover.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the sponge city-based water seepage and flood drainage system disclosed by the invention comprises a water storage tank 2 arranged below a road inspection well 1, wherein the top surface of the water storage tank 2 is provided with a water inlet, the bottom surface of the road inspection well 1 is provided with a water leakage port corresponding to the water inlet, the water inlet on the top surface of the water storage tank 2 is communicated with the water leakage port on the bottom surface of the road inspection well 1 through a communicating cavity 6, a coarse filter screen 4 is arranged in the water leakage port, and a fine filter screen 5 is arranged in the water inlet; a water suction pump 7 is arranged at the bottom of the water storage tank 2, a water outlet of the water suction pump 7 is communicated with a landscape lake 9 of the city park through a water suction pipe 8, the end part of the water suction pipe 8 extending into the landscape lake 9 is bent downwards, a filter cover 23 is covered on the outer side of the end part, and a slope 22 is arranged on the outer side of the end part of the water suction pipe 8; the ground layer 10 surrounding the landscape lake 9 is provided with a suspended layer 11 below, the suspended layer 11 is communicated with the landscape lake 9, the ground layer 10 is divided into an upper planting layer 12, a middle water storage layer 13 and a lower bearing plate 14, a geotextile layer is respectively arranged among the upper planting layer 12, the middle water storage layer 13 and the lower bearing plate 14, the planting layer 12 is a mixture of soil and plant nutrient matrix, and the weight ratio of the soil to the plant nutrient matrix is (10-12): (1-3), the water storage layer 13 is prepared from the following components in parts by weight (5-6): (3-4) uniformly mixing the fine sand and the coarse sand, wherein the particle size of the fine sand is 2-3 cm, and the particle size of the coarse sand is 3-5 mm; the edge of the supporting plate 14 close to the landscape lake 9 is fixedly connected with a supporting plate 15 for supporting the planting layer 12 and the water storage layer 13, the guardrail 3 is installed on the supporting plate 15, a supporting column 16 is supported below the supporting plate 14, the lower end of the supporting column 16 extends into the bottom surface of the suspended layer 11, landscape plants 17 are planted on the planting layer 12, and vertical water permeable holes 18 are distributed on the supporting plate 14; emergent aquatic plants, submerged plants and floating plants are planted in the landscape lake 9.

Referring to fig. 2, the cross section of the water storage tank 2 is trapezoidal, the water storage tank 2 is formed by integrally pouring reinforced concrete, the top of the water storage tank 2 is 2-3 m long, the bottom of the water storage tank 2 is 3.5-4.5 m long, and the height of the water storage tank is 4-6 m. The bottom surface of the water storage tank 2 is provided with a sand gathering groove 19, a sand pump 20 is arranged in the sand gathering groove 19, and the outlet of the sand pump 20 is connected with a sand pumping pipe 21 extending into the ground.

Referring to fig. 3, the support plate 14 is formed by casting concrete in a mold and solidifying, and the water permeable holes 18 are integrally cast.

The implementation principle of the embodiment is as follows: when meeting rainy weather in this embodiment, the rainwater that gets into among the road inspection shaft 1 respectively through the mouth that leaks of road inspection shaft 1 bottom surface, intercommunication chamber 6, the water inlet of storage water tank 2 top surface, simultaneously under the double filtration of the coarse filtration of coarse filter screen 4 and the fine filtration of fine filter screen 5, gather gradually in storage water tank 2 and be used for the storage rainwater, the impurity that stores up in the storage rainwater in storage water tank 2 deposits gradually on storage water tank 2's bottom surface through the sedimentation effect, water pump 7 starts to pump the storage water in storage water tank 2 to the view lake 9 in city park in. The periphery of the landscape lake 9 is wound with a suspended layer 11, a ground layer 10 of landscape plants 17 is planted above the suspended layer 11, the suspended layer 11 can contain more rainwater, the stored water in the suspended layer 11 is shielded by the ground layer 10 to reduce the natural evaporation capacity of the water, and meanwhile, the rainwater stored in the landscape lake 9 can be reused, for example, the irrigation of greening vegetation in parks or the irrigation of road vegetation and the like; the ground layer 10 is divided into a planting layer 12 at the upper part, a water storage layer 13 at the middle part and a bearing plate 14 at the lower part, the water storage layer 13 can be used for storing moisture required by plant growth, vertical water permeable holes 18 are distributed on the bearing plate 14, the water surface of the landscape lake 9 is higher than the tops of the water permeable holes 18, the water stored in the landscape lake 9 is pressed into the water storage layer 13 through the water permeable holes 18 by utilizing the principle of a communicating device, the water storage layer 13 can also supplement the moisture from the landscape lake 9 through the permeation of the bearing plate 14 or a supporting plate 15, and a supporting column 16 is supported below the bearing plate 14, so that the integral stability of the ground layer 10 surrounding the landscape lake 9 is ensured.

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

Claims

1. The utility model provides a infiltration flood discharge system based on sponge city, includes storage water tank (2) that set up in road inspection shaft (1) below, its characterized in that: a water inlet is formed in the top surface of the water storage tank (2), a water leakage port corresponding to the water inlet is formed in the bottom surface of the road inspection well (1), the water inlet in the top surface of the water storage tank (2) is communicated with the water leakage port in the bottom surface of the road inspection well (1) through a communicating cavity (6), a coarse filter screen (4) is installed in the water leakage port, and a fine filter screen (5) is installed in the water inlet; the water storage tank is characterized in that a water suction pump (7) is arranged at the bottom of the water storage tank (2), a water outlet of the water suction pump (7) is communicated with a landscape lake (9) of a city park through a water suction pipe (8), a suspended layer (11) is arranged below a ground layer (10) surrounding the landscape lake (9), the suspended layer (11) is communicated with the landscape lake (9), the ground layer (10) is divided into a planting layer (12) at the upper part, a water storage layer (13) at the middle part and a supporting plate (14) at the lower part, a supporting plate (15) used for supporting the planting layer (12) and the water storage layer (13) is fixedly connected to the edge of the supporting plate (14) close to the landscape lake (9), a supporting column (16) is supported below the supporting plate (14), the lower end of the supporting column (16) extends into the bottom surface of the suspended layer (11), plants (17) are planted on the planting layer (12), and vertical water permeable holes (18) are distributed on the, the water surface of the landscape lake (9) is higher than the top of the water permeable holes (18).

2. The water seepage and flood drainage system based on the sponge city as claimed in claim 1, wherein: the cross section of the water storage tank (2) is trapezoidal, the water storage tank (2) is formed by integrally pouring reinforced concrete, the length of the top of the water storage tank (2) is 2-3 m, the length of the bottom of the water storage tank (2) is 3.5-4.5 m, and the height of the water storage tank is 4-6 m.

3. The water seepage and flood drainage system based on the sponge city as claimed in claim 2, wherein: the bottom surface of the water storage tank (2) is provided with a sand gathering groove (19), a sand pumping pump (20) is placed in the sand gathering groove (19), and an outlet of the sand pumping pump (20) is connected with a sand pumping pipe (21) extending into the ground.

4. The water seepage and flood drainage system based on the sponge city as claimed in claim 1, wherein: the planting layer (12) is a mixture of soil and a plant nutrient substrate, and the weight ratio of the soil to the plant nutrient substrate is (10-12): (1-3).

5. The water seepage and flood drainage system based on the sponge city as claimed in claim 1, wherein: the water storage layer (13) is prepared from (5-6) by weight: and (3-4) uniformly mixing the fine sand and the coarse sand.

6. The water seepage and flood drainage system based on the sponge city as claimed in claim 5, wherein: the particle size of the fine sand stone is 2-3 cm, and the particle size of the coarse sand is 3-5 mm.

7. The water seepage and flood drainage system based on the sponge city as claimed in claim 1, wherein: the bearing plate (14) is formed by casting concrete in a forming mould and solidifying, and the water permeable holes (18) are integrally cast.

8. The water seepage and flood drainage system based on the sponge city as claimed in claim 1, wherein: and geotextile layers are respectively arranged among the planting layer (12) at the upper part, the water storage layer (13) at the middle part and the bearing plate (14) at the lower part.

9. The water seepage and flood drainage system based on the sponge city according to any one of claims 1 to 8, characterized in that: emergent aquatic plants, submerged plants and floating plants are planted in the landscape lake (9).

10. The water seepage and flood drainage system based on the sponge city as claimed in claim 9, wherein: the end part of the water pumping pipe (8) extending into the landscape lake (9) is bent downwards, the outer side of the end part is covered with a filter cover (23), and the outer side of the end part of the water pumping pipe (8) is provided with a slope (22).