CN217460855U

CN217460855U - Ecological tree pool system for intercepting rainwater surface runoff pollutants

Info

Publication number: CN217460855U
Application number: CN202220958027.1U
Authority: CN
Inventors: 雷钢; 郑伊雯; 柏杨; 卢梓昀; 黄桂娜; 李科润; 钟烜焜; 钟煜熳; 谭煜武; 陈俊杰
Original assignee: Guangdong Polytechnic Of Water Resources And Electric Engineering
Current assignee: Guangdong Polytechnic Of Water Resources And Electric Engineering
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-09-20
Anticipated expiration: 2032-04-22

Abstract

The utility model relates to an ecological tree pool system for intercepting rainwater surface runoff pollutants, which comprises a prefabricated ecological tree pool, wherein the prefabricated ecological tree pool is sequentially provided with a reservoir, an intercepting pool and a purifying pool from outside to inside, a first pool wall is arranged between the reservoir and the intercepting pool, the bottom of the first pool wall is provided with a filter grid, and the filter grid is communicated with the reservoir and the intercepting pool; a second tank wall is arranged between the interception tank and the purification tank, a plurality of overflow holes are formed in the second tank wall from the bottom to the top, and the overflow holes are communicated with the interception tank and the purification tank; the first pool wall is lower than the pool wall of the prefabricated ecological tree pool, and the second pool wall is lower than the first pool wall. The utility model discloses a undercurrent formula structure makes the rainwater flow along specific route, and purifying effect is good, can effectively intercept various pollutants, belongs to ecological tree pool technical field.

Description

Ecological tree pool system for intercepting rainwater surface runoff pollutants

Technical Field

The utility model relates to an ecological tree pool technical field, concretely relates to interception rainwater surface runoff pollutant ecological tree pool system.

Background

In recent years, with the rapid advance of urbanization, large-area hardening pavement and delayed construction of underground infrastructure become more and more prominent, and the contradiction between urban water environment pollution and the demand of people for happy life becomes more and more prominent. A series of outstanding problems in cities occur occasionally, for example, hardened pavements cannot permeate rainwater, so that the rainwater is gathered on the ground, and the waterlogging of the cities is greatly increased; the supplement of rainwater to underground water is blocked, so that the urban underground water level is difficult to rise, the health of vegetation is directly influenced, and the pollution of surface runoff carrying pollutants to the water environment is also aggravated.

At present, related patent technologies have been developed in the aspect of surface runoff pollution control, such as: chinese patent No. CN108951816A discloses an ecological tree pool system and construction method, which can ensure that rainwater is collected when raining, and water and soil loss does not occur at the place where the street trees are cultivated, thus overcoming the disadvantages in the management of the cultivation of the street trees. Chinese patent No. CN 107447808A discloses a rainwater collection and purification ecological tree pool, which can effectively solve the problems of rainwater collection, purification and storage. However, the above patents all have general rainwater purification effects, and lack the interception and removal of TN, TP and heavy metal elements in runoff pollutants, and cannot provide a simple and rapid construction scheme.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists among the prior art, the utility model aims at: the rainwater surface runoff pollutant intercepting ecological tree pool system is good in purifying effect and capable of effectively intercepting various pollutants.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an ecological tree pool system for intercepting rainwater surface runoff pollutants comprises a prefabricated ecological tree pool, wherein a water storage pool, an intercepting pool and a purifying pool are sequentially arranged in the prefabricated ecological tree pool from outside to inside, a first pool wall is arranged between the water storage pool and the intercepting pool, a filtering grid is arranged at the bottom of the first pool wall, and the filtering grid is communicated with the water storage pool and the intercepting pool; a second tank wall is arranged between the interception tank and the purification tank, a plurality of overflow holes are formed in the second tank wall from the bottom to the top, and the overflow holes are communicated with the interception tank and the purification tank; the first pool wall is lower than the pool wall of the prefabricated ecological tree pool, and the second pool wall is lower than the first pool wall.

Preferably, a water storage tank is arranged at the bottom of the prefabricated ecological tree pool and is positioned below the water storage tank, the interception tank and the purification tank, and the purification tank is provided with a water outlet communicated with the water storage tank; a water permeable film is arranged above the water outlet and provided with a through hole, and the through hole is arranged corresponding to the water outlet.

Preferably, the top of the purification tank is provided with a planting part, the planting part comprises a plant planting area and a microorganism planting area, and the microorganism planting area is distributed around the plant planting area.

As a preferred choice, the prefabricated ecological tree pool is made of ecological concrete and is of a cylindrical structure.

As a preferred, the cistern is the inverted triangle structure, and the top of cistern is equipped with the interception net, and the both ends border of interception net is connected with the pool wall in prefabricated ecological tree pond and the top of first pool wall respectively.

As a preferred, the interception pond is cylindrical structure, and the overflow hole is the circular port, and overflow hole evenly distributed is on the second pool wall.

Preferably, the interception tank is provided with a gravel layer, a gravel layer and a pebble layer, and the gravel layer, the gravel layer and the pebble layer are sequentially distributed in the interception tank from bottom to top.

Preferably, the crushed stones in the crushed stone layer have a particle size of 20-30mm, the gravel layer has a particle size of 1mm, and the pebbles in the pebble layer have a particle size of 30-50 mm.

Preferably, the purification tank is provided with a pebble layer, a gravel layer and a crushed stone layer, wherein the pebble layer, the gravel layer and the crushed stone layer are sequentially distributed in the purification tank from bottom to top.

Preferably, the pebbles in the pebble layer have a particle size of 30-50mm, the gravels in the gravel layer have a particle size of 1mm, and the crushed stones in the crushed stone layer have a particle size of 20-30 mm.

The principle of the utility model is that: the method is suitable for sponge city construction and low-influence development and transformation of old communities, and can effectively intercept surface runoff pollutants, thereby achieving the concept and requirement of sponge city construction theory of storage, purification, use and discharge. The device comprises: prefabricated ecological tree pond, cistern, interception pond, filtering ponds and tank. The prefabricated ecological tree pool is prefabricated by ecological concrete, can be installed and used quickly in construction, and effectively solves the problems that rainwater infiltrates into the ground and the like. The intercepting pool and the filtering pool are filtering systems in the ecological tree pool system, are of a subsurface flow type, and can build pollutant intercepting matrixes through selection of filler materials and matching of different particle sizes, so that a runoff flow path can be increased, and a pollutant intercepting effect is achieved, especially TN, TP, ammonia nitrogen and heavy metal pollutants. Meanwhile, the overflow port and the drain hole are arranged, so that the purpose of quick drainage can be achieved. The reservoir can effectively collect rainwater to achieve the purpose of rapid drainage, and the reservoir can achieve the purpose of rainwater recycling.

In general, the utility model has the advantages as follows:

1. the utility model discloses purifying effect is good, can effectively intercept the surface runoff pollutant to reach the sponge city construction reason idea and the requirement of "holding, purifying, using, arranging". Solving the problem of surface runoff pollution, intercepting runoff pollution from entering a rainwater pipeline, putting a prefabricated ecological tree pool into a treated foundation pit, sequentially adding fillers in a filtering system, and then planting shrubs. The ecological tree pool is prefabricated by ecological concrete, so that the on-site installation and construction progress is effectively accelerated, and the leakage of rainwater in rainfall is reduced due to the ecological tree pool with an integrated structure. By designing a subsurface flow type filtering structure, the pollutant intercepting matrix is constructed by selecting the material of the filler and matching different particle sizes, the runoff flow path is increased, and the pollutant intercepting function is achieved.

2. The utility model discloses an ecological concrete is prefabricated and is formed, and the construction is simple and convenient, can install fast and use. Meanwhile, the whole prefabrication can effectively reduce structural construction joints and reduce the problem of outward leakage of runoff.

3. The utility model provides a filtration system adopts for undercurrent formula, multiplicable runoff motion path. Meanwhile, the purpose of intercepting runoff pollutants is achieved by filling fillers with different particle sizes.

4. The utility model provides a purification tank provides the space for plant and microbial growth, can effectively purify pollutants such as TN, TP, heavy metal in the runoff pollutant.

5. The utility model provides a tank can hold the rainwater when rainfall is big, and the later stage reaches the purpose of rainwater retrieval and utilization.

Drawings

Fig. 1 is a schematic view of an ecological tree pool system for intercepting rainwater surface runoff pollutants.

Fig. 2 is a top view of an ecological tree pool system for intercepting rainwater surface runoff pollutants.

Fig. 3 is a schematic view of a water reservoir.

FIG. 4 is a schematic diagram of an intercept pool.

FIG. 5 is a schematic diagram of a purification tank.

Wherein, 1 is prefabricated ecological tree pond, 2 is the cistern, 3 is the interception pond, 4 is the purification tank, 5 is the tank, 6 is planting the portion, 7 is the bush, 8 is filtering grid, 9 is the interception net, 10 is the overflow hole, 11 is the outlet, 12 is first pool wall, 13 is the second pool wall, 14 is the gravel layer, 15 is the pebble layer, 16 is the gravel layer, 17 is the thin film that permeates water.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments.

The cross-section that cistern, interception pond and the purifying tank of this embodiment become a vertical direction is trapezoidal circular cone, and the region between circular cone and the prefabricated ecological tree pond is the tank, and circular cone handstand sets up, and the one end that the diameter is big is the top, and the one end that the diameter is little is the bottom, is the horn mouth form.

The external diameter of the prefabricated ecological tree pool of this embodiment is 1200mm, and is high for 1000mm, and ecological concrete material wall thickness is 30 mm. The prefabricated ecological tree pool, the reservoir, the interception pool and the purification pool are integrally arranged, so that the installation and construction are more convenient, the whole prefabrication can effectively reduce structural construction joints, and the problem of outward seepage of runoff is reduced.

The bottom of the prefabricated ecological tree pool is provided with a water storage pool, the water storage pool is positioned below the water storage pool, the interception pool and the purification pool, and the purification pool is provided with a water outlet communicated with the water storage pool; a water permeable film is arranged above the water outlet and provided with a through hole, and the through hole is arranged corresponding to the water outlet. The water storage tank can accumulate rainwater when the rainfall is large, and can play a role in rainwater recycling when a dry season comes, so that shrubs cannot dry up. The permeable film with the diameter of 30 mu m can effectively intercept the root growth, the diameter of the through holes is between 25 and 30mm, and the through holes are uniformly distributed on the bottom plate of the purification tank 9, so that the aim of quickly draining water is fulfilled.

The top of purifying pond is equipped with planting portion, and planting portion includes that plant plants district and microorganism and plants the district, and the microorganism is planted the district and is encircleed plant and plants the district and distribute. The plant growing area is a shrub growing place, and pollutants in runoff, especially TN, TP, ammonia nitrogen and heavy metal pollutants in the ground surface can be effectively purified through filling of the filler and planting of plants and microorganisms.

The prefabricated ecological tree pool is prepared from ecological concrete and is of a cylindrical structure. Installation construction is convenient, and simultaneously, whole prefabrication can effectively reduce structure construction joint, reduces the outward seepage's of runoff problem.

The cistern is the structure of falling triangle, and the top of cistern is equipped with the interception net, and the both ends border of interception net is connected with the pool wall in prefabricated ecological tree pond and the top of first pool wall respectively. The vertical section of the water storage tank is of a triangular structure, and the sloping side tank wall of the water storage tank inclines from the top of the tank wall of the prefabricated ecological tree tank to the middle of the prefabricated ecological tree tank in the direction of inclining from the upper part to the lower part; the short-side tank wall is vertically arranged to form a first tank wall, the other short-side tank wall is formed by an interception net, and the interception net is arranged at the top of the tank wall so as to intercept pollutants with larger volume; the bottom is provided with a filtering grid for intercepting pollutants with smaller volume. The distance between the top of the wall of the prefabricated ecological tree pool and the top of the first pool wall is 300mm, and the integral height of the first pool wall is 600 mm. The interception net and the filtering grating can effectively intercept large-particle pollutants such as branches and leaves. When the rainfall is large, the reservoir can collect rainwater first, and the problem of surface water accumulation is reduced.

The interception pond is cylindrical structure, and the overflow hole is the circular port, and overflow hole evenly distributed is on the second pool wall. When rainfall runoff is small, the rainfall runoff flows into the purification tank through the overflow hole of the interception tank, and the purpose of purifying pollutants is achieved. The width of the interception tank 8 is 100mm, and the height thereof is 550 mm.

The interception tank is provided with a gravel layer, a sand gravel layer and a pebble layer, and the gravel layer, the sand gravel layer and the pebble layer are sequentially distributed in the interception tank from bottom to top.

The particle size of the crushed stone in the crushed stone layer is 20-30mm, the particle size of the gravel in the gravel layer is 1mm, and the particle size of the pebble in the pebble layer is 30-50 mm.

The purification tank is provided with a pebble layer, a gravel layer and a gravel layer, wherein the pebble layer, the gravel layer and the gravel layer are sequentially distributed in the purification tank from bottom to top. The diameter of the bottom of the purification tank is 400mm, and the height of the purification tank is 550 mm.

The particle size of pebbles in the pebble layer is 30-50mm, the particle size of gravels in the gravel layer is 1mm, and the particle size of crushed stones in the gravel layer is 20-30 mm.

The pollutant interception matrix is constructed by selecting the material of the filler of the purification tank and the interception tank and matching different particle sizes, the runoff flow path is increased, and the effect of intercepting pollutants is achieved, so that the urban surface runoff pollution problem is reduced.

The implementation process is as follows:

the method comprises the following steps: according to the construction site condition and the size requirement of the ecological system, measurement paying-off and foundation pit excavation are well performed.

Step two: processing the bottom of the foundation pit, filling 100-150mm broken stones and tamping, or paving a layer of plain concrete with the thickness of 50 mm;

step three: accurately hoisting the prefabricated ecological tree pool into the treated foundation pit, stably installing the prefabricated ecological tree pool and preventing the preformed hole from being blocked;

step four: and after the prefabricated ecological tree pool is stably installed, performing backfill work on foundation pit soil bodies around, backfilling in layers, and tamping in layers.

Step five: and installing an interception net on the upper part of the reservoir, hoisting the prepared interception net which is suitable for the size of the ecological tree pool to an accurate position, and installing and fixing the interception net. The interception net can effectively intercept large-volume pollutants in runoff.

Step six: the bottom of the outer side of the interception tank is provided with a filtering grid which is connected with the reservoir, so that runoff pollutants with small volume can be effectively intercepted; the inner side is provided with overflow ports with the diameter of 25mm, the overflow ports are uniformly distributed on the inner side of the intercepting pool, and the pollutants can flow into the purifying pool through the overflow ports of the intercepting pool when the rainfall runoff is small, so that the purpose of purifying the pollutants is achieved.

Step seven: screening pebbles, gravels and broken stones with different particle sizes, and sequentially filling the gravel, the gravels and the pebbles from bottom to top as a filler of the interception pool. Filling in layers, wherein the bottom layer is filled with 20-30mm of broken stones with the height of 100mm and is tamped; the middle layer is filled with gravel with the grain diameter of 1mm, the height of the gravel is 150mm, and the gravel is tamped; the upper layer is filled with pebbles with the grain diameter of 30-50mm, the height of 200mm and tamped.

Step eight: a 30-micron permeable film is arranged on the bottom plate of the purification tank, so that the growth of root systems can be effectively intercepted, and water can be effectively drained; the bottom of the purification tank is also provided with water outlets, the diameter of each water outlet is 2.5-3cm, and the water outlets are uniformly distributed on the bottom plate of the purification tank, so that the aim of quickly draining water is fulfilled.

Step nine: the purification tank is provided with pebbles, gravel and broken stones from bottom to top in sequence through different choices of filler materials and different particle size combinations. Pebbles with the grain diameter of 30-50mm are filled in the bottom layer, the height is 200mm, and the pebbles are tamped; the middle layer is filled with gravel with the grain diameter of 1mm, the height of the gravel is 150mm, and the gravel is tamped; the upper layer is filled with 20-30mm of crushed stone with the height of 100mm and is tamped.

Step ten: in the filling process of the sand gravel layer of the purification pool, measurement and paying off are carried out, shrubs are hoisted to the accurate position and planted, the specifications of the shrubs are selected to be about H80-120X D40cm, and then layered backfilling and tamping are carried out. Meanwhile, in the gravel backfilling process, microbial agents are added in layers, 100g of microbial agents are added into each layer, 5 layers are added in total, and finally, gravel is filled and tamped.

Step eleven: and (3) maintaining shrubs and microorganisms, wherein watering maintenance is carried out every 1 day in the previous week, and watering maintenance can be carried out every 2-3 days after one week until the shrubs survive.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. The utility model provides an ecological tree pond system of interception rainwater surface runoff pollutant which characterized in that: the ecological tree pool comprises a prefabricated ecological tree pool, wherein a water storage pool, an interception pool and a purification pool are sequentially arranged in the prefabricated ecological tree pool from outside to inside, a first pool wall is arranged between the water storage pool and the interception pool, and a filter grid is arranged at the bottom of the first pool wall and communicated with the water storage pool and the interception pool; a second tank wall is arranged between the interception tank and the purification tank, a plurality of overflow holes are formed in the second tank wall from the bottom to the top, and the overflow holes are communicated with the interception tank and the purification tank; the first pool wall is lower than the pool wall of the prefabricated ecological tree pool, and the second pool wall is lower than the first pool wall.

2. The ecological tree pool system for intercepting rainwater surface runoff pollutants as claimed in claim 1, wherein: the bottom of the prefabricated ecological tree pool is provided with a water storage pool, the water storage pool is positioned below the water storage pool, the interception pool and the purification pool, and the purification pool is provided with a water outlet communicated with the water storage pool; a water permeable film is arranged above the water outlet and provided with a through hole, and the through hole is arranged corresponding to the water outlet.

3. The ecological tree pool system for intercepting rainwater surface runoff pollutants as claimed in claim 1, wherein: the top of the purification tank is provided with a planting part, the planting part comprises a plant planting area and a microorganism planting area, and the microorganism planting area is distributed around the plant planting area.

4. The ecological tree pool system for intercepting rainwater surface runoff pollutants as claimed in claim 1, wherein: the prefabricated ecological tree pool is prepared from ecological concrete and is of a cylindrical structure.

5. The ecological tree pool system for intercepting rainwater surface runoff pollutants as claimed in claim 1, wherein: the cistern is the structure of falling triangle, and the top of cistern is equipped with the interception net, and the both ends border of interception net is connected with the pool wall in prefabricated ecological tree pond and the top of first pool wall respectively.

6. The ecological tree pool system for intercepting rainwater surface runoff pollutants as claimed in claim 1, wherein: the interception pond is cylindrical structure, and the overflow hole is the circular port, and overflow hole evenly distributed is on the second pool wall.

7. The ecological tree pool system for intercepting rainwater surface runoff pollutants as claimed in claim 6, wherein: the interception pool is provided with a gravel layer, a gravel layer and a pebble layer, and the gravel layer, the gravel layer and the pebble layer are sequentially distributed from bottom to top in the interception pool.

8. The ecological tree pool system for intercepting rainwater surface runoff pollutants as claimed in claim 7, wherein: the particle size of the crushed stone in the crushed stone layer is 20-30mm, the particle size of the gravel in the gravel layer is 1mm, and the particle size of the pebble in the pebble layer is 30-50 mm.

9. The ecological tree pool system for intercepting rainwater surface runoff pollutants as claimed in claim 1, is characterized in that: the purification tank is provided with a pebble layer, a sand-gravel layer and a gravel layer, and the pebble layer, the sand-gravel layer and the gravel layer are sequentially distributed in the purification tank from bottom to top.

10. The ecological tree pool system for intercepting rainwater surface runoff pollutants as claimed in claim 9, wherein: the particle size of pebbles in the pebble layer is 30-50mm, the particle size of gravel in the gravel layer is 1mm, and the particle size of broken stone in the gravel layer is 20-30 mm.