CN105089142A - Low elevation greenbelt rainwater regulation scheduling pool and distributed rainwater regulation scheduling pool system - Google Patents

Abstract

The invention discloses a sunken green space rainwater storage and dispatch pool and a distributed rainwater storage and dispatch pool system, comprising a sunken green space (1), a rainwater overflow well (2) and a rainwater storage and dispatch pool (7) , to realize the integrated water storage, drainage and water supply with the rainwater pipe network or sewage pipe network. Compared with the prior art, the present invention more effectively regulates rainwater runoff and flood detention, reduces runoff pollution, and realizes the functions of rainwater purification, storage and utilization; at the same time, the system is closely integrated with the city's rainwater and sewage pipe network to solve problems caused by Urban waterlogging caused by heavy rain, runoff pollution caused by rainwater erosion, and resource utilization of rainwater, etc. According to the drainage capacity of drainage pipes, water storage is dispatched, which provides an important means for the construction of sponge cities, and has outstanding social, environmental and economic benefits. .

Description

Concave rainwater storage and dispatching pool for green space and decentralized rainwater storage and dispatching pool system

technical field

The invention relates to the technical field of rainwater resource utilization and water supply and drainage, in particular to a design method of a sunken green land rainwater storage and dispatching pool.

Background technique

With the significant acceleration of the urbanization process in my country and the continuous expansion of the city scale, a large number of artificial buildings have increased the hardened ground in the city, and the increase in the impermeable area of the underlying surface of the hardened ground has led to an increase in the runoff coefficient of rainwater and a faster confluence speed, resulting in During urban rainstorms, street flooding and groundwater reserves decrease, resulting in serious urban water and soil erosion and flood drainage problems. At the same time, the runoff pollution caused by rainwater scouring the ground also increases the difficulty of urban sewage treatment. If the initial rainwater after scouring the ground is directly discharged into natural water bodies, it will seriously pollute the water resource environment.

Rainwater is a precious water resource. Except for initial rainwater, its pollution degree is relatively light. After treatment, it can be used as miscellaneous water sources such as urban greening and road flushing. At present, there are three mature rainwater utilization technologies in cities, namely, roof rainwater collection, urban pavement rainwater utilization, and urban green space, flower beds and garden rainwater continued utilization.

The sunken green space is a kind of public green space whose elevation is lower than the surrounding road surface, also called low-lying green space. The concept is to use the concave open space to receive and store rainwater, so as to reduce runoff and discharge. Generally speaking, low-lying green spaces have certain requirements on the depth of the depression. Moreover, most of its soil quality has not been improved. Once it is applied in a large area, it is easily affected by terrain and other conditions, resulting in a low actual storage volume.

The rainwater storage tank refers to the collection and utilization facilities with the function of rainwater storage, and also has the function of reducing the peak flow. In urban reconstruction, the application of rainwater storage tanks is increasing. However, the construction of a large-volume rainwater storage tank occupies a large area and is expensive. Urban practices have shown that for the goal of controlling stormwater floods in an all-round way, the small-volume, decentralized multi-regulation storage tank model is more effective than the large-volume, centralized monotonous storage tank model.

Contents of the invention

Based on the problems existing in the above-mentioned prior art, the present invention proposes a sunken green space rainwater storage and dispatching pool, and designs a system that integrates the sunken green space, rainwater storage and rainwater dispatching to more effectively regulate rainwater Runoff and flood detention, reduce runoff pollution, and realize the purification, storage and utilization of rainwater; at the same time, the system is closely integrated with the city's rainwater and sewage pipe network to solve urban waterlogging caused by heavy rain, runoff pollution caused by rainwater erosion, and The resource utilization of rainwater and other issues, according to the drainage capacity of the drainage pipes to dispatch and store water, provides an important means for the construction of sponge cities, and has outstanding social, environmental and economic benefits.

The purpose of the present invention is achieved by taking the following technical solutions:

A sunken green area rainwater storage and dispatching pool system, which realizes integrated water storage, drainage and water supply with the rainwater pipe network or sewage pipe network. The system includes a sunken green area 1, a rainwater overflow well 2, and a rainwater storage and dispatching pool 7; wherein: the concave green space 1 is set lower than the ground; the wellhead of the rainwater overflow well 2 is close to the ground, and the well body extends to the rainwater storage and dispatching pool 7 arranged at the bottom of the concave green space 1; the rainwater regulation The top of the storage and dispatching pool 7 is provided with a water collection plate 6, and the artificial backfill soil layer 3, sand and gravel filter layer 4, and non-woven geotextile cushion are sequentially filled between the water collection plate 6 and the concave green space 1. 5. Commonly used for rainwater filtration;; the side of the storage and dispatching pool 7 is provided with drainage pipe 8 and overflow pipe 9, and the drainage pipe 8 is located at the bottom; It is a pipeline of rainwater and sewage confluence system, and then each drainage pipeline 8 and overflow pipeline 9 are connected to the sewage pipeline; a pump 11 is provided under the rainwater overflow well 2 and in the rainwater storage and dispatching pool 7 for greening and sprinkling irrigation; When the rainwater storage and dispatching pool 7 is full, excess rainwater is discharged to the city's rainwater pipe network.

The present invention also proposes a decentralized rainwater storage and dispatch pool system, the system includes a plurality of distributed sunken green space rainwater storage and dispatch pools, and each sunken green space rainwater storage and dispatch pool system includes a concave The green space 1, the rainwater overflow well 2 and the rainwater storage and dispatching pool 7, and the storage and dispatching pools are connected to each other; wherein: the concave green space 1 is set lower than the ground; the wellhead of the rainwater overflow well 2 is close to the ground, and the well body extends To be arranged in the rainwater regulation and storage dispatch pool 7 at the bottom of the sunken green space 1; the top of the rainwater regulation and storage dispatch pool 7 is provided with a water collecting plate 6, and between the water collecting plate 6 and the sunken green space 1 The artificial backfill soil layer 3, the sandstone filter layer 4, and the non-woven geotextile cushion layer 5 are filled in sequence, and are jointly used for rainwater filtration; the side of the storage and regulating pool 7 is provided with a drainage pipe 8, an overflow pipe 9 and The drainage pipe 8 is located at the bottom; the overflow pipe 9 merges with the drainage pipe 8 and connects the rainwater pipe network; Below the overflow well 2, a water pump 11 is provided in the rainwater storage and dispatching pool 7 to perform greening sprinkler irrigation; when the rainwater storage and dispatching pool 7 is full, excess rainwater is discharged to the urban rainwater pipe network.

Compared with existing systems, the invention can more effectively alleviate urban waterlogging, reduce urban runoff pollution load and save water resources. Firstly, the system utilizes the sunken green land to eliminate the pollution of rainwater runoff, and the rainwater entering the storage and dispatching pool can be used for ecological water use in green land and gardens through water pumps; at the same time, considering the possibility of secondary rainfall in a short period of time, the regulating tank designed by the present invention There is a drainage port in the storage and dispatching pool to connect with the drainage pipe network. When the drainage pipe network has sufficient drainage capacity, the water pump is used to drain the air-conditioning storage tank to realize the water dispatching function to continue the secondary rainstorm runoff, which greatly improves the urban resistance. The ability of multiple short-term rainstorms; finally, the invention creates a new connection to the city's reclaimed water pipe network, which solves the problem that the water in the storage and dispatching pool cannot be effectively replenished when there is no rainfall in the city.

Compared with the prior art, the implementation of the present invention has the following technical effects:

1. The present invention integrates the functions of rainwater collection, purification, storage, scheduling, and green water use, and is more in line with the concept of sustainable development of rainwater runoff collection, reduction of runoff pollution, and improvement of water resource utilization;

2. The rainwater storage and dispatching pool of the present invention has small volume, low cost, easy site selection and management, and is suitable for sponge city construction;

3. The sewage pipeline designed by the present invention ensures that in the case of multiple heavy rains, when the drainage pipeline has sufficient drainage capacity, it can be emptied, realize staggered discharge, reduce urban waterlogging, and improve the city's ability to meet heavy rain again;

4. The design of the sunken green space improves the rainwater collection capacity. After the rainwater runoff is purified by the soil and sand filter layer, the pollution of the initial rainwater is greatly reduced;

5. The invention is groundbreakingly connected to the city's reclaimed water reuse pipe network, which solves the problem that when there is no rainfall in the city, the rainwater storage and dispatching pool can be effectively supplemented through the reclaimed water pipe for green irrigation;

6. The system of the present invention is equipped with a water pump, and the distributed storage and dispatching pool is like an emergency water source located in every corner of the city. If it cooperates with the ground water supply cock, the stored rainwater or reclaimed water can be used for urban road washing and fire water and other water supply sources.

Description of drawings

Fig. 1 is the structural representation of the specific embodiment 1 of the present invention;

Fig. 2 is the structural representation of the rainwater regulation and storage dispatch pond of the specific embodiment 1 of the present invention;

Fig. 3 is a schematic structural diagram of a second specific example of the present invention;

Fig. 4 is the structural representation of the rainwater storage and dispatch pond of the second concrete example of the present invention;

Reference signs: 1. Recessed green land, 2. Rainwater overflow outlet, 3. Artificial backfill soil layer, 4. Sand filter layer, 5. Non-woven geotextile cushion, 6. Water collecting plate, 7. Rainwater Storage and dispatching pool, 8. Sewage pipeline, 9. Overflow pipeline, 10. Reclaimed water supply pipeline, 11. Suction pump, 12. Water distribution pipe.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. If there are exemplary contents in these embodiments, they should not be construed as limiting the present invention.

Specific embodiment 1:

As shown in Fig. 1 and Fig. 2, the present invention consists of a sunken green space 1, a rainwater overflow well 2, an artificial backfill soil layer 3, a sand filter layer 4, a rainwater regulation pool 7, a water pump 11, and a water distribution pipe 12 , Reclaimed water supply pipeline 10, overflow pipeline 9 and blowdown pipeline 8 are formed. Among them, the design elevation of the concave green space 1 is 200mm lower than the surrounding roads, and the artificial backfill soil layer 3 with a backfill height of 25-30cm under the green space plants has good permeability. Layer 4, or use slag as the filler in this layer to reduce costs. The layer of filler is covered with non-woven geotextiles to form a non-woven geotextile cushion 5. A rainwater storage and dispatching pool 7 with a water collection plate 6 is built under the entire system. The depth of the rainwater storage and dispatching pool 7 is 2.0-4.0m, and the depth of the rainwater storage and dispatching pool is designed comprehensively considering the buried depth of the municipal sewage pipes. The area of the storage and dispatching pool 7 should not be too large, and it can be considered comprehensively according to the catchment area of the green space and the green water consumption designed for storage. A drainpipe 8 is arranged at the bottom of the side of the storage and dispatch pool 7, and a reclaimed water supply pipe 10 and an overflow pipe 9 are arranged on the side, and the drainpipe 8 and the overflow pipe 9 are connected to the rainwater pipe. If the surroundings of the green land are rainwater and sewage confluence pipelines, then the drainage pipeline 8 and the overflow pipeline 9 are connected to the rainwater pipeline. The 8 outlets of the drainage pipes are controlled by electromagnetic turnstiles, which are used when there are multiple continuous rainfalls to realize the emptying of the water storage dispatching pool. A water pump 11 is provided in the rainwater storage and dispatch pool 7, which is connected to the water distribution pipe 12, or connected to the ground water supply hydrant (for example: a fire hydrant). Or it can be used for greening and road flushing through ground water hydrants.

The structure and function of the above components are described as follows:

(1) The sunken green space 1 is used to collect, store and filter pollutants in rainwater; it is a green space lower than the surrounding ground and road surface, and the artificial backfill soil layer 3 with strong permeability is used as the planting soil. It is a construction An important low-impact development measure of the sponge city, planting flood-tolerant plants with rainwater absorption and interception functions in the green space, improves the rainwater collection capacity under the premise of meeting the green space ecology, landscape and other basic conditions. The depth of the depression should be determined according to the flood tolerance performance of the plants and the soil infiltration performance. Studies have shown that the sunken green space for the purpose of rainwater resource utilization should have a sunken depth of 80-160mm, and the sunken depth for the purpose of rainwater stagnation and peak shaving should be 100-300mm. There is a storage and dispatching pool 7 under the concave green, and the depth can be appropriately set at about 200mm;

(2) The rainwater overflow port 2 is used to discharge rainwater exceeding the seepage storage capacity of the sunken green space, so as to improve the flood storage capacity of the green space. At the same time, the water pump 11 required for green irrigation is placed under the rainwater overflow port, which is convenient for later system management and maintenance;

(3) Artificial backfill soil layer 3 and sandstone filter layer 4 have formed the infiltration system of rainwater, and artificial backfill soil layer 3 is mainly used in the planting of green space plants, and the backfill soil that the present invention adopts should have good permeability, can allow Rainwater infiltrates quickly, and at the same time, under the joint action of plants, soil, and microorganisms, it can purify the infiltrated rainwater very well. And the gravel filter layer 4 laid under the planting soil layer can be made of sand gravel and crushed stone, and also plays the role of filtering together with the artificial backfill soil layer, while maintaining the water and soil structure of the upper backfill soil layer 3;

(4) The geotextile cushion layer 5 is arranged between the sand filter layer 4 and the water collecting plate 6 to play a role of partition. Non-woven geotextile is a kind of permeable geosynthetic material made of synthetic fibers through acupuncture or weaving. It has excellent filtering, isolation, reinforcement and protection functions, and it has good permeability, high temperature resistance, freezing resistance and aging resistance. ,preservative. The present invention uses the geotextile cushion layer 5 as the partition between the rainwater storage and dispatching pool 7 and the concave green space 1, which effectively prevents the upper layer of soil, impurities, etc. purify;

(5) The rainwater storage and dispatch pool 7 is a measure for rainwater resource utilization with rainwater storage and dispatch functions. The rainwater storage and dispatch pond 7 of the present invention is different from traditional storage ponds, and realizes rainwater storage, dispatch, and greening Coupled with water functions, smaller in size and low in construction costs, it provides an important means for the construction of sponge cities. A honeycomb water-collecting plate 6 is arranged above the storage and dispatching pool 7 for collecting rainwater infiltrated through the backfill soil layer 3 , the sand filter layer 4 and the non-woven geotextile 5 . There are three pipelines on the side of the rainwater storage and dispatching pool 7, which are the sewage pipeline 8, the overflow pipeline 9 and the reclaimed water supply pipeline 10;

(6) The effect of the sewage pipeline 8 is to effectively empty the storage and dispatching pool 7 in the face of the secondary rainfall in a short period of time, so as to prepare for the storage of the secondary rainstorm and reduce the increase of the secondary rainstorm in the city. Risk of flooding hazards;

(9) The overflow pipe 9 is to consider the volume of the rainwater storage and dispatching pool 7. When it is full, the excess rainwater is discharged to the city's rainwater pipe. Compared with the rainwater directly flowing into the urban rainwater pipe, the overflow The water quality of the rainwater discharged from the flow pipe 9 has been significantly improved after multi-layer infiltration and the joint action of plants and microorganisms, which reduces the difficulty of sewage treatment in urban rainwater treatment plants;

(6) The reclaimed water supply pipeline 10 is used to connect the rainwater storage and dispatching pool 7 and the urban reclaimed water reuse pipe network. The rainfall in cities across the country varies, and in northern cities like Tianjin, most of the rainfall is relatively concentrated In summer; at the same time, as a water-scarce city, there will inevitably be more development of water reuse systems. In order to avoid the rainwater storage and dispatching pond 7 from being stagnant in the absence of rainfall, the water level of the regulating and storage dispatching pond 7 can be supplemented by reclaimed water connection, so that it can be effectively replenished even in the absence of rainfall;

(7) Suction pump 11, water distribution pipe 12 are used for rainwater regulation and storage and dispatching pool 7 to continue to store and dispatch rainwater; Urban greening and road erosion. The water pump 11 can be used to pump out the air-conditioning storage dispatch pool under the situation of multiple short-term heavy rains, and prepare for the rainwater storage dispatch pool 7 to meet the secondary rainstorm. At the same time, the water pump can also be connected to the ground water supply cock for green irrigation and road flushing.

Specific embodiment 2:

Referring to Figure 3 and Figure 4, the characteristic of this example is that it is more feasible to adopt the design of interconnected distributed storage and dispatching pools in consideration of large-area green land such as squares, which can reduce construction costs while reducing construction costs. More comprehensive control of rainwater torrents.

Claims (10)

1. a concave herbaceous field rainwater storage scheduling pond, realize and Storm Sewer Network or the comprehensive retaining of sewage network, draining and water supply, it is characterized in that, comprise concave herbaceous field (1), stormwater overflow well (2) and rainwater storage scheduling pond (7); Wherein: concave herbaceous field (1) is arranged lower than ground; The well head of stormwater overflow well (2) is close to ground, and well body extends in rainwater storage scheduling pond (7) being arranged at concave herbaceous field (1) bottommost; Described rainwater storage scheduling pond (7) top is provided with water collection sheet (6), artificial back fill course (3), sandstone filtering layer (4), non-woven geotextile bed course (5) is sequentially filled with, jointly for dmp filter between described water collection sheet (6) and described concave herbaceous field (1); Describedly regulate and store that scheduling pond (7) side arranges drainage pipe (8), overflow pipe (9) and drainage pipe (8) are positioned at bottom; Overflow pipe (9) collaborates with drainage pipe (8) and is connected Storm Sewer Network, if around greenery patches be the pipeline of rainwater, sewage combined system, then each drainage pipe (8) and overflow pipe (9) are connected to sewage conduct; Be provided with suction pump (11) in described stormwater overflow well (2) below, rainwater storage scheduling pond (7), carry out greening sprinkling irrigation; When rainwater storage scheduling pond (7) stores full, unnecessary rainwater is discharged to the Storm Sewer Network in city.

2. concave herbaceous field rainwater storage scheduling pond as claimed in claim 1, it is characterized in that, also comprise middle water supply pipeline (10), be arranged at described rainwater storage scheduling pond (7) side, connect rainwater storage scheduling pond (7) and municipal middle water reuse pipe network, the stagnant sky when not having rainfall, available middle water connects the water level supplementing scheduling pond (7) of regulating and storing, and makes it also can effectively be supplemented when not having rainfall.

3. concave herbaceous field rainwater storage scheduling pond as claimed in claim 1, is characterized in that, also comprise distribution pipe (12), be arranged on concave herbaceous field (1).

4. concave herbaceous field rainwater storage scheduling pond as claimed in claim 3, it is characterized in that, described suction pump (11) is connected with described distribution pipe (12), rainwater in rainwater storage scheduling pond (7) is extracted out through suction pump (11), deliver to distribution pipe (12), through distribution pipe (12) for concave herbaceous field greening sprinkling irrigation.

5. concave herbaceous field rainwater storage scheduling cell system as claimed in claim 1, it is characterized in that, described suction pump (11) is connected to ground hydrant, through ground hydrant for afforesting washing away of sprinkling irrigation and road.

6. a distributing rainwater storage scheduling cell system, it is characterized in that, this system comprises multiple distributed concave herbaceous field rainwater storage scheduling cell system, each concave herbaceous field rainwater storage scheduling cell system includes concave herbaceous field (1), stormwater overflow well (2) and rainwater storage scheduling pond (7), and each is regulated and stored, scheduling pond communicates with each other; Wherein: concave herbaceous field (1) is arranged lower than ground; The well head of stormwater overflow well (2) is close to ground, and well body extends in rainwater storage scheduling pond (7) being arranged at concave herbaceous field (1) bottommost; Described rainwater storage scheduling pond (7) top is provided with water collection sheet (6), artificial back fill course (3), sandstone filtering layer (4), non-woven geotextile bed course (5) is sequentially filled with, jointly for dmp filter between described water collection sheet (6) and described concave herbaceous field (1); Describedly regulate and store that scheduling pond (7) side arranges drainage pipe (8), overflow pipe (9) and drainage pipe (8) are positioned at bottom; Overflow pipe (9) collaborates with drainage pipe (8) and is connected Storm Sewer Network, if around greenery patches be the pipeline of rainwater, sewage combined system, then each drainage pipe (8) and overflow pipe (9) are connected to sewage conduct; Be provided with suction pump (11) in described stormwater overflow well (2) below, rainwater storage scheduling pond (7), carry out greening sprinkling irrigation; When rainwater storage scheduling pond (7) stores full, unnecessary rainwater is discharged to the Storm Sewer Network in city.

7. distributing rainwater storage scheduling cell system as claimed in claim 6, it is characterized in that, this system also comprises middle water supply pipeline (10), be arranged at described rainwater storage scheduling pond (7) side, connect rainwater storage scheduling pond (7) and municipal middle water reuse pipe network, the stagnant sky when not having rainfall, available middle water connects the water level supplementing scheduling pond (7) of regulating and storing, and makes it also can effectively be supplemented when not having rainfall.

8. distributing rainwater storage scheduling cell system as claimed in claim 6, it is characterized in that, this system also comprises distribution pipe (12), is arranged on concave herbaceous field (1).

9. distributing rainwater storage scheduling cell system as claimed in claim 8, it is characterized in that, described suction pump (11) is connected with described distribution pipe (12), rainwater in rainwater storage scheduling pond (7) is extracted out through suction pump (11), deliver to distribution pipe (12), through distribution pipe (12) for concave herbaceous field greening sprinkling irrigation.

10. distributing rainwater storage scheduling cell system as claimed in claim 6, it is characterized in that, described suction pump (11) is connected to ground hydrant, through ground hydrant for afforesting washing away of sprinkling irrigation and road.