CN106337484B - Infiltration flood drainage system based on sponge city - Google Patents

Abstract

The invention discloses a water seepage and flood drainage system based on a sponge city, which includes a constructed wetland, the constructed wetland is connected to a buffer pool through a second water pipe, and the buffer pool is connected to a river channel through a first water pipe; the constructed wetland is successively arranged as a disinfection layer, The first isolation layer, the aquifer and the planting layer; the planting layer is provided with soil, and the planting layer is planted with emergent plants; the aquifer is provided with coarse sand; the first isolation layer is provided with barriers for blocking sediment The mud board is wrapped with geotextiles outside the mud board; a number of volcanic rocks are arranged in the disinfection layer. The seepage and flood drainage system based on the sponge city solves the problem that rainwater is difficult to infiltrate and accumulate and utilize. At the same time, the system can effectively relieve the flood discharge pressure of the river, increase the convenience of municipal water use, and realize the infiltration, collection and purification of river water and rainwater. , storage and utilization functions.

Description

Water seepage and flood drainage system based on sponge city

technical field

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

Background technique

With the significant acceleration of the urbanization process in our country, the continuous expansion of the city scale, the intensification of the urban ground hardening, resulting in the increase of the rainwater runoff coefficient and the acceleration of the confluence, in case of heavy rain, the road surface is prone to water accumulation, and in severe cases, it is easy to cause urban road traffic paralysis and casualties.

Sponge city refers to a city that can be like a sponge and has good "elasticity" in adapting to environmental changes and responding to natural disasters. use. In recent years, with the frequent occurrence of extreme weather, waterlogging is common in many cities in my country after heavy rainfall. The concept of "sponge city" has attracted more and more attention in solving urban waterlogging, and has been written into construction plans one after another.

In the past, the methods and ideas for controlling urban waterlogging in my country were relatively simple, focusing on the pursuit of large-area hardened pavement, adding and expanding infiltration facilities and underground drainage pipes, etc. The strong drainage of rainwater; the non-point source pollution caused by rainwater erosion has increased the difficulty of urban sewage treatment, and at the same time brought a certain pressure on the urban pipeline network for flood discharge, but after the heavy rain, it fell into the dilemma of dryness and water shortage. The heat island effect is significant.

In recent years, sunken greenbelts, infiltration ponds, wet ponds, etc. have begun to attract attention and have been rapidly constructed. However, due to the relatively single filler, although the infiltration of rainwater has been accelerated to a certain extent, it is difficult to effectively store rainwater and purify it. Take advantage of it. Therefore, the research and development of multifunctional devices and systems that can efficiently and continuously ensure rainwater infiltration, storage, purification, and reuse are particularly necessary for the construction of sponge cities.

Contents of the invention

In view of the above-mentioned deficiencies in the prior art, the seepage and flood drainage system based on the sponge city provided by the present invention solves the problem that urban rainwater is difficult to infiltrate and accumulate and utilize.

In order to achieve the above-mentioned purpose of the invention, the technical scheme adopted in the present invention is:

A sponge city-based seepage and flood drainage system is provided, which includes a constructed wetland, the constructed wetland is connected to a buffer pool through a second water pipe, and the buffer pool is connected to a river channel through a first water pipe;

Constructed wetlands are sequentially set up as a disinfection layer, a first isolation layer, an aquifer and a planting layer from bottom to top; soil is set in the planting layer, and emergent plants are planted on the planting layer; coarse sand is set in the aquifer; the first The isolation layer is provided with a mud barrier for blocking sediment, and the mud barrier is wrapped with a geotextile; a number of volcanic rocks are arranged in the disinfection layer.

Further, the bottom of the buffer pool is provided with a silt collection boss; the buffer pool is provided with a filter plate, and a sand pump is arranged between the filter plate and the silt collection boss; the sand pump is connected with a silt extraction pipe.

Further, the inclined surface of the sediment collection boss faces the filter plate.

Further, an intercepting device connected to the first water pipe is provided in the river channel, and the intercepting device is set as a hollow triangular prism, and one side of the triangular prism is provided with a water inlet and installation holes surrounding the water inlet; one side of the triangular prism is provided with a grid plate; the water inlet is connected to the first water pipe.

Further, the constructed wetland also includes a water collection layer arranged under the disinfection layer, the water collection layer includes several empty boxes, the surface of the empty boxes is provided with through holes, and a water pump is arranged in the empty box; the bottom of the water collection layer is provided with a second Two isolation layers, the second isolation layer is provided with mud barriers for blocking sediment, and the mud barriers are wrapped with geotextiles.

Further, the system also includes a water storage tank, a drainage hole is arranged at the bottom of the storage tank, and the water storage tank is connected to the water pump through the fourth water pipe and the third water pipe; the third water pipe is connected to the fourth water pipe, and the two ends of the fourth water pipe are respectively connected to the water storage tank and cache pool.

Further, the system also includes a control system, the control system includes a control unit, a first solenoid valve set on the first water pipe, a first liquid level sensor set on the top of the buffer pool, a second electromagnetic valve set on the second water pipe Valve, the second liquid level sensor arranged above the planting layer of the constructed wetland, the third liquid level sensor arranged on the top of the water storage tank, and the multi-position multi-way solenoid valve arranged at the connection between the third water pipe and the fourth water pipe; A solenoid valve, the first liquid level sensor, the second solenoid valve, the second liquid level sensor, the third liquid level sensor and the multi-position and multi-way solenoid valves are all connected with the control unit.

The beneficial effects of the present invention are:

1. The present invention can effectively alleviate the flood discharge capacity of the river channel to the rain and flood, and play the role of peak shaving and storage; and the uniquely designed artificial wetland can not only increase the infiltration of rain and flood, but also filter and disinfect the infiltrated river water and rainwater , to optimize the environment.

2. Due to the lack of vegetation in the city, the river water will carry a large amount of sediment during heavy rains. The buffer pool can settle the sediment and mud carried in the river water, avoiding the problem of sediment blocking the pipeline during the subsequent flow of rainwater, reducing the The sediment content entering the constructed wetland protects the ecological environment of the constructed wetland.

And the silt collecting boss and the filter plate arranged in the buffer pool can gather the silt together, and the silt in the buffer pool is cleaned by the set sand pump to prevent the filter plate from clogging.

3. The water storage tank provided by the present invention can store the water resources naturally filtered from the artificial wetland, and improve the utilization efficiency of water resources in the city.

4. The first solenoid valve set in the present invention can control the isolation between the system and the river, and the second solenoid valve can prevent the water in the constructed wetland from flowing back to the buffer pool; when the water level in the buffer pool triggers the first liquid level sensor, the first The liquid level sensor sends a signal to the control unit, and the control unit controls the second solenoid valve to open, so that the water in the buffer pool flows to the artificial wetland; when the second liquid level sensor is triggered, it means that the artificial wetland is saturated, and the second liquid level sensor sends the signal Send it to the control unit, and the control unit controls the first electromagnetic valve to close to prevent the system from overloading.

5. Except for the artificial wet area, all other parts of the system are underground, which has little impact on the surrounding environment. It basically does not occupy the ground space and can improve the utilization rate of land resources; it is suitable for all kinds of urban main roads and residential roads. For large squares, etc., the corresponding buffer pool size can be set according to different places of use, with strong adaptability.

Description of drawings

Fig. 1 is the structural representation of this system;

Figure 2 is a schematic diagram of the structure of the constructed wetland;

Fig. 3 is a structural schematic diagram of the intercepting device.

Among them: 1. River channel; 11. Interception device; 111. Water inlet; 112. Installation hole; 113. Grid plate; 2. First water pipe; 21. First solenoid valve; 3. Buffer pool; 31. Sediment pumping 32. Sediment collection boss; 33. Filter plate; 34. First liquid level sensor; 35. Sand pump; 4. Second water pipe; 41. Second solenoid valve; 5. Constructed wetland; 51. Planting layer; 52, aquifer layer; 53, first isolation layer; 54, disinfection layer; 544, volcanic rock; 55, catchment layer; 551, empty tank; 56, second isolation layer; 57, second liquid level Sensor; 58. Emerging plants; 59. Water pump; 6. Storage tank; 61. Drainage hole; 62. The third liquid level sensor; 7. The third water pipe; 8. The fourth water pipe; 81. Multi-position multi-way solenoid valve .

Detailed ways

The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

Example 1

As shown in Figure 1, the seepage and flood drainage system based on the sponge city includes a constructed wetland 5, which is connected to the buffer pool 3 through the second water pipe 4, and the buffer pool 3 is connected to the river channel 1 through the first water pipe 2; the constructed wetland 5 is set in In the park or other environments to be greened, the system is built and the environment is beautified.

As shown in Figure 2, a disinfection layer 54, a first isolation layer 53, a water storage layer 52, and a planting layer 51 are successively arranged in the constructed wetland 5 from bottom to top; Emergent plants 58 are planted; the matrix in the aquifer 52 is mainly coarse sand, and the coarse sand is preferably quartz sand with a diameter between 1mm-8mm; the first isolation layer 53 is provided with a mud shield for blocking silt, The mud partition is wrapped with geotextiles, wherein the material of the mud partition is aluminum alloy; the disinfection layer 54 is mainly filled with some volcanic rocks for disinfection. Wherein the thickness of planting layer 51, water storage layer 52 and disinfection layer 54 is 15cm-30cm.

In order to prevent people from entering the constructed wetland 5 by mistake and causing potential safety hazards, fences are preferably set up around the constructed wetland 5 , wherein the fence can be made of bricks to further improve the water storage capacity of the constructed wetland 5 .

Emergent plants 58 can be selected according to the local climate characteristics and the water storage height of the constructed wetland 5, among which aquatic plants such as Zailihua and reed grass are preferred. In order to ensure ecological balance, the planted plants can be a variety of mixed species, and the distance between It is advisable not to exceed 10 plants per square meter.

The constructed wetland 5 can also feed loach, koi and other fish with low requirements for living conditions. Feeding such fish can not only improve the ecological balance of the constructed wetland 5, but also further purify the water body, loosen the soil in the planting layer 51, and improve The infiltration efficiency of water can be improved, and the feces of fish can also bring the requisite fertilizer for the growth of emergent plants 58.

Since each layer of the constructed wetland 5 has a certain filtering and cleaning function, and the filled materials are also convenient for water storage and infiltration, the quality of water permeated into the ground is high, preventing groundwater from being polluted.

The buffer pool 3 is provided with a trapezoidal silt collection boss 32 near the bottom of the first water pipe 2, and a filter plate 33 is arranged in front of the silt collection boss 32, and the sieve diameter of the filter plate 33 is 0.1mm- 0.3mm, and the inclined plane of the silt collection boss 32 faces the filter plate 33, a tank body for collecting silt is left between the silt collection boss 32 and the filter plate 33, and a sand pump 35 is arranged in the tank body to pump The sand pump 35 is connected to the outside of the buffer pool 3 through the sand extraction pipe 31, and the sand pump 35 can effectively remove the collected sand and reduce the filtration pressure of the filter plate 33.

Example 2

This embodiment is a further improvement on the seepage and flood drainage system on the basis of Example 1. Specifically, referring to FIG. Rubbish enters the first water pipe 2 and causes the water pipe to be blocked, affecting the intercepting device 11 of the normal operation of the system.

The intercepting device 11 is set as a hollow triangular prism, a water inlet 111 and an installation hole 112 surrounding the water inlet 111 are arranged on one side of the triangular prism; a grid plate 113 is arranged on one side of the triangular prism. During implementation, the water inlet 111 of the intercepting device 11 is docked with the first water pipe 2, and the intercepting device 11 is fixed on the river channel wall by using the installation hole 112, so that the side with the grid plate 113 faces away from the upstream to prevent the direct impact of the river water And enter the first water pipe 2 to prevent the garbage mixed in the river water from being sucked into the first pipe 2.

In order to improve the garbage blocking effect of the grid plate 113, the mesh diameter of the grid plate 113 is preferably 2mm-10mm. Since the intercepting device 11 is located in water for a long time, in order to improve the corrosion resistance of the intercepting device 11, the material of the intercepting device 11 is preferably aluminum alloy.

Since the grid plate 113 is located behind, the garbage in the river can not only not enter the first water pipe 2, but also will not block the water inlet of the first water pipe 2, effectively reducing the maintenance frequency of the system.

Example 3

This embodiment is a further improvement on the constructed wetland on the basis of Embodiment 1 and Embodiment 2. Specifically referring to FIG. 1 and FIG. The water layer 55 is formed by stacking several empty boxes 551, and the surface of the empty boxes 551 is provided with through holes, and a water pump 59 is arranged in one of the empty boxes 551 near the shore of the constructed wetland 5; The second isolation layer 56 is made of the same structural material as the first isolation layer 53 . A large number of cavities formed by the water collection layer 55 enable it to accumulate a large amount of water resources, which can quickly infiltrate in rainy seasons and be absorbed by upper vegetation in dry seasons, ensuring the ecological balance of the constructed wetland 5 .

Example 4

This embodiment further improves the seepage and flood drainage system on the basis of Example 3, specifically referring to Figure 1, the seepage and flood drainage system based on the sponge city also includes a water storage tank 6, and a Drainage hole 61, this drainage hole 61 is used for external water pipe, and the water resource in the storage tank 6 is effectively utilized; The storage tank 6 is connected to the water pump 59 through the fourth water pipe 8 and the third water pipe 7, wherein one end of the third water pipe 7 is connected to the first Four water pipes 8, one end is connected to the water pump 59, the two ends of the fourth water pipe 8 are respectively connected to the water storage tank 6 and the buffer pool 3, and the end of the fourth water pipe 8 located in the buffer pool 3 passes through the filter plate 33 preferentially.

The water pump 59 is arranged in the inside of the constructed wetland 5, so that the extracted water has been well filtered to meet the requirements of watering plants and cleaning roads, and is convenient for municipal water intake.

Example 5

This embodiment is a further improvement on the seepage and flood drainage system based on the sponge city based on the embodiments 1 to 4. Specifically, referring to FIG. 1, the seepage and flood drainage system based on the sponge city also includes a control system, The control system includes a control unit, a first solenoid valve 21 arranged on the first water pipe 2, a first liquid level sensor 34 arranged on the top of the buffer tank 3, a second solenoid valve 41 arranged on the second water pipe 4, and a The second liquid level sensor 57 above the planting layer of the constructed wetland 5, the third liquid level sensor 62 arranged on the top of the water storage tank 6, and the multi-position multi-way solenoid valve arranged at the connection between the third water pipe 7 and the fourth water pipe 8 81; the first solenoid valve 21, the first liquid level sensor 34, the second solenoid valve 41, the second liquid level sensor 57, the third liquid level sensor 62 and the multi-position multi-way solenoid valve 81 are all connected to the control unit.

The first solenoid valve 21 can control the isolation of the system from the river channel 1, and the second solenoid valve 41 can prevent the water in the constructed wetland from flowing back to the buffer pool 3; when the water level in the buffer pool 3 triggers the first liquid level sensor 34, the second A liquid level sensor 34 sends a signal to the control unit, and the control unit controls the second solenoid valve 41 to open, so that the water in the buffer pool 3 flows to the constructed wetland 5; when the second liquid level sensor 57 is triggered, it means that the constructed wetland 5 is saturated , the second liquid level sensor 57 sends a signal to the control unit, and the control unit controls the first solenoid valve 21 to close, thereby disconnecting the water source to prevent the system from overloading.

When it is necessary to clean up the buffer pool 3, it is only necessary to use the control unit to connect the multi-position multi-way solenoid valve 81 to the direction of the fourth water pipe 8 leading to the buffer pool 3, and turn on the water pump 69 and the sand pump 35 to collect The silt is quickly drawn away by the sand pump 35 under the mixing of water, and when the silt is cleaned, the first electromagnetic valve 21 and the second electromagnetic valve 41 are preferentially closed, so that the cleaning work is more rapid and efficient.

After the silt cleaning is completed, close the sand pump 35, turn the multi-position multi-way solenoid valve 81 to the water storage tank 6, keep the first solenoid valve 21 and the second solenoid valve 41 open, and make the system work again.

This control system realizes semi-automatic control of the seepage and flood drainage system based on the sponge city, reasonably controls the seepage and flood drainage system, and maximizes the use efficiency of the seepage and flood drainage system.

To sum up, the seepage and flood drainage system based on the sponge city solves the problem that rainwater is difficult to infiltrate and accumulate and utilize. Infiltration, collection, purification, storage and utilization functions.

Claims (1)

1. A kind of 1. infiltration flood drainage system based on sponge city, it is characterised in that：Including artificial swamp (5), the artificial swamp (5) river course (1) is connected by the first water pipe (2) by the second water pipe (4) Connection Cache pond (3), the cache pool (3)；

   Sterilizing layer (54), the first separation layer (53), aquifer (52) and kind are sequentially provided with the artificial swamp (5) from bottom to up Plant layer (51)；Soil is provided with the plantation layer (51), kind is implanted with emergent aquactic plant (58) on plantation layer (51)；The aquifer (52) coarse sand is provided with；Be provided with first separation layer (53) for stop silt every mud plate, it is described every outside mud plate It is enclosed with geotextiles；Some peleliths (544) are provided with the sterilizing layer (54)；

   The bottom of the cache pool (3) is provided with silt and collects boss (32)；Filter is provided with the cache pool (3) (33), the filter (33) and the silt are provided with sand pump (35) between collecting boss (32)；The sand pump (35) It is connected with silt and detaches pipe (31)；

   The silt collects the inclined plane of boss (32) towards the filter (33)；

   The blocking apparatus (11) of the first water pipe of connection (2) is provided with the river course (1), the blocking apparatus (11) is arranged to empty Heart triangular prism, water inlet (111) and the mounting hole around the water inlet (111) are provided with a side of the triangular prism (112)；One side of the triangular prism is provided with Turbogrid plates (113)；The water inlet (111) connects first water pipe (2)；

   The artificial swamp (5) also includes being arranged on the collection water layer (55) below the sterilizing layer (54), the collection water layer (55) Including several empty vans (551), empty van (551) surface is provided with through hole, and a water pump is provided with the empty van (551) (59)；The second separation layer (56) is provided with below the collection water layer (55), is provided with and is used in second separation layer (56) Stop silt every mud plate, it is described to be wrapped with geotextiles every mud plate；

   Also include tank (6), the bottom of the tank (6) is provided with an osculum (61), and the tank (6) passes through Four water pipes (8) and the 3rd water pipe (7) connect the water pump (59)；3rd water pipe (7) connects the 4th water pipe (8), institute The both ends for stating the 4th water pipe (8) connect the tank (6) and cache pool (3) respectively；

   Also include control system, the control system includes control unit, the first magnetic valve being arranged on the first water pipe (2) (21) first liquid level sensor (34) on cache pool (3) top, the second solenoid valve being arranged on the second water pipe (4), are arranged on (41), it is arranged on the second liquid level sensor (57) above the plantation layer (51) of artificial swamp (5), is arranged on tank (6) top 3rd liquid level sensor (62) in portion, and be arranged on the multidigit of the 3rd water pipe (7) and the 4th water pipe (8) junction and be powered magnetic more Valve (81)；First magnetic valve (21), the first liquid level sensor (34), second solenoid valve (41), the second liquid level sensor (57), the 3rd liquid level sensor (62) and multidigit various way solenoid valve (81) are connected with control unit.