WO2018191924A1

WO2018191924A1 - Modularization-based processing system and processing method for road rainwater runoff in low impact city

Info

Publication number: WO2018191924A1
Application number: PCT/CN2017/081319
Authority: WO
Inventors: 翟俊; 曾丽竹
Original assignee: 苏州大学张家港工业技术研究院
Priority date: 2017-04-20
Filing date: 2017-04-20
Publication date: 2018-10-25

Abstract

A modularization-based processing system for road rainwater runoff in a low impact city, the system comprising modularized curbs and a processing pool. The modularized curbs form side walls of the processing pool. The modularized curbs comprise modules A (1), modules B (2), and modules C (3). The modules C (3) are provided with an opening at an upper portion thereof. The processing pool comprises a first-stage processing pool (4), a second-stage processing pool (5), and a third-stage processing pool (6). A module C (3) is provided between the first-stage processing pool and the second-stage processing pool, and between the second-stage processing pool and the third-stage processing pool. A rainwater inlet is provided at the first-stage processing pool (4). A gravel layer (41) is provided at the rainwater inlet. Also disclosed is a modularization-based processing method for road rainwater runoff in a low impact city.

Description

Title of Invention: Modular Road Rainwater Runoff Treatment System and Processing Method for Sponge City Technical Field

[0001] The invention belongs to the technical field of low impact bursting of sponge city construction, and particularly relates to a modular road rainwater runoff processing system and a processing method for a sponge city.

Background technique

[0002] In recent years, with the rapid development of urbanization in China, the groundwater level has dropped at an alarming rate. Urban shackles have become a hot issue of concern, and the road traffic system is a high-risk zone where guilt arises. In the past, the city pursued “one row” of rainwater. The low urban drainage standards and the lack of rainwater utilization systems are the main causes of disasters. With the concept of LID (Low Impact Development), the establishment of a new urban road rainwater treatment system that is “infiltration, stagnation, storage, net, use and platoon” has become an important means to control the ills of the city.

[0003] In the construction of the urban drainage system in line with the LID concept, the existing planning and design concept is to preferentially use the "green" measures such as planting ditch, seepage brick, rain garden, and sinking green space to organize drainage, with "slow release" The "and" source dispersion is dominated. The more practical treatment is to pass the rainwater runoff through the rainwater inlet of the curbstone directly into the road greenbelt or the streetside greenbelt separated by the curb. Although such practices have achieved a divergent source, the initial road rainwater runoff carries solid materials such as floating garbage, gravel, and sediment, and heavy metal ions, pathogens, and organic pollutants. Direct discharge is not only easy to block the rainwater inlet and outlet, It also affects plant growth. In addition, during frequent rains or heavy rains, rainwater can easily form high-speed water on the road, which can seriously impact and destroy the greening of roads or the vegetation of street greens. Moreover, the curb stone is not only complicated in construction steps, but also needs to consider external factors such as weather and temperature. Secondly, it is easy to lack corners during transportation, which affects the construction progress and appearance.

[0004] Therefore, in order to implement the sponge city LID concept and its practices, it is necessary to develop and design a road rainwater runoff treatment system, which is conducive to urban benign hydrological cycle, improve the penetration, storage, purification, utilization and Emission capacity, which is conducive to solving the problem of lower groundwater level.

technical problem

Problem solution Technical solution

[0005] The object of the present invention is to design a road rainwater runoff treatment system with low cost, low impact and simple operation, which is suitable for the road under the sponge city concept. Change the existing curb design to solve the problem of damage to green space facilities caused by silt and organic pollutants, heavy metal ions, pathogens, etc. in the rainwater treatment of sponge city roads, including floating garbage and gravel in road rainwater runoff Screening and filtration of solid impurities such as sediment, adsorption and purification of harmful substances in storm water runoff, relaxation and energy dissipation of rainwater runoff impact, overflow treatment of large rainfall and recycling of equipment.

[0006] In order to achieve the above functional purpose, the present invention discloses a sponge urban modular road rainwater runoff treatment system, including a modular curb and a treatment pool; the modular curb constitutes a side wall of the treatment pool The modular curb stone includes a module A, a module B, and a module C; the top of the module C is provided with a mouth; the processing pool includes a primary processing pool, a secondary processing pool, and a tertiary processing pool; A module C is disposed between the primary treatment tank and the secondary treatment tank; a module C is disposed between the secondary treatment tank and the tertiary treatment tank; the primary treatment tank is provided with a rainwater introduction port; and the rainwater introduction port is provided Gravel layer.

[0007] The present invention also discloses a sponge urban modular road rainwater runoff treatment pool combination structure, including a primary treatment tank, a secondary treatment tank, a tertiary treatment tank; the primary treatment tank, secondary treatment A module C is disposed between the pools; a module C is disposed between the secondary treatment tanks and the tertiary treatment tanks; the primary treatment tank is provided with a rainwater introduction port; and the tertiary treatment tank is provided with a rainwater outlet.

[0008] In the above technical solution, the module, the module B, and the module C are all T-shaped structures; the module A, the module B, and the module C are combined and connected to form a modular curb, increasing the friction area, and forming a processing pool. The side wall, wherein the module C serves as a baffle separating the primary treatment tank, the secondary treatment tank, and the tertiary treatment tank, and the top is provided with a cornice for rainwater circulation. The T-shaped structure has a rib portion and a left wing portion and a right wing portion perpendicular to the rib portion. Preferably, the left wing portion and the lower end portion of the right wing portion of the module A are provided with holes or inserts; and the left end portion of the module B and the lower end portion of the right wing portion are provided. a hole or an insert; a hole or an insert is provided at a lower end of the left wing portion and the right wing portion of the module C; when combined, a plug of one module can be inserted into a hole of another module, so that the connection can be stabilized; further preferably, the a hole is provided in the left end portion of the module A and a lower end portion of the right wing portion; a hole is formed in a left end portion of the module B and a lower end portion of the right wing portion; a hole is formed in a left end portion of the module C and a lower end portion of the right wing portion; The fixed shape forms the structure of the road rainwater runoff treatment system, on the one hand, avoids complicated preparation of the plug-in, and facilitates transportation. [0009] In the above technical solution, the left wing portion of the module B or the lower end of the right wing portion is provided with two holes, so that it can be connected with the same-oriented module steel bar or the vertical module steel bar, thereby obtaining a very stable structure. To avoid turbulent flow of dirty rainwater, please refer to the embodiment of the present invention.

[0010] In the above technical solution, the secondary processing pool is composed of a secondary processing pool unit A, a secondary processing pool unit B, and a secondary processing pool unit C; the secondary processing pool unit A and the secondary processing pool A module C is disposed between the unit B; a module C is disposed between the secondary processing pool unit C and the secondary processing pool unit B; and the secondary processing pool unit and the secondary processing pool unit B are disposed between The mouth of the module C disposed between the mouth of the module C and the secondary treatment tank unit C and the secondary treatment tank unit B is located in different vertical planes, preferably in a diagonal setting; the rainwater runoff passes the secondary treatment The plant's flow rate is slowed down, and the diversion of the diversion channel is an "S" type streamline, which promotes the interception of rainwater, allowing plants and substrates to have more adequate interception and adsorption of pollutants to remove NH3-N and COD. Contaminants, and the second interception of particulate pollutants carried in rainwater. The secondary processing pool unit A is adjacent to the primary processing pool; the secondary processing pool unit C is adjacent to the tertiary processing pool; and the module C is disposed between the primary processing pool and the secondary processing pool The mouth of the module C disposed between the mouthpiece and the secondary treatment tank unit VIII and the secondary treatment tank unit B is located in different vertical planes; the secondary treatment tank and the tertiary treatment tank are disposed between The mouth of the module C and the mouth of the module C provided between the secondary treatment tank unit C and the secondary treatment tank unit B are located in different vertical planes, which can further increase the rainwater flow path.

[0011] In the above technical solution, the tertiary treatment tank is provided with a rainwater outlet; the rake of the module C disposed between the rainwater outlet and the secondary treatment tank and the tertiary treatment tank is located at different vertical planes. It can further increase the flow path of rainwater and increase the retention time of rainwater in the tertiary treatment tank.

[0012] In the above technical solution, the bottom of the three-stage treatment tank is provided with a concave structure, and the rainwater intercepted by the secondary treatment tank overflows into the tertiary treatment tank, and a large amount of rainwater is retained to slowly infiltrate, thereby reducing heat generated during the rainwater flow. Finally, it slowly flows into the roadside green space, reducing the erosion of vegetation by stormwater runoff, effectively solving the unfavorable results brought by the prior art rainwater scouring.

[0013] In the above technical solution, the processing pool is provided with an artificial filler layer, a planting soil layer, a covering layer, an aquifer layer and a plant layer in order from bottom to top, and preferably the artificial filler layer is separated from the planting soil layer by a geotextile layer. The longitudinal slope of the base layer of the rainwater runoff treatment system of the present invention is the same as the longitudinal slope of the road, and the rainwater flows through the whole system under the action of gravity; the road rainwater runoff flows from the rainwater inlet to the primary treatment tank, first passes through the coarse-grained gravel layer. Intercepting large floating garbage, flowing through the plant belt of the primary treatment tank, waiting for the rainwater to fill the mouth, rainwater flowing into the secondary treatment tank, and the rainwater runoff through the plants in the secondary treatment tank to slow down the flow rate, setting the diagonal of the mouth The diversion rainwater is an "S" type streamline, which promotes the interception of rainwater, allowing plants and substrates to have more adequate interception and adsorption of pollutants to remove pollutants such as NH3-N and COD, and the second interception of rainwater. Particulate pollutants, rainwater intercepted by the secondary treatment tank overflows into the tertiary treatment tank, and a large amount of rainwater is retained to slowly infiltrate, reducing the heat generated during the rainwater flow, and finally slowly flowing into the roadside green space, and the rainwater runoff is too large. , can directly flow into the adjacent green belt from the outlet of the tertiary treatment tank.

[0014] The road rainwater runoff treatment system disclosed in the present invention comprises a modular curb stone and a treatment pool, placed beside the road, and matched with the rainwater management system of the sponge city road, which is a combination of rainwater filtration, purification and infiltration at the beginning. The modular road rainwater runoff treatment system with rapid drainage during the rainstorm period is especially in line with the practice of modular kerbstone and treatment pool in the sponge city. . The modular curb stone size design is based on the engineering dimensions of the existing curbstones in China. The basic dimensions are: width 120mm, length 1200mm, height 900mm.

[0015] Preferably, the modular curb is prefabricated with C30 concrete.

[0016] Preferably, the modular kerb stone is in a "T" type structure combination, and the module A, the module B, and the module C are combined to form a sidewall of the processing pool.

[0017] Preferably, the modular curb edge is a 20 mm chamfer.

[0018] Preferably, the modular kerb stone is matched with a steel member with a length of 440 mm and a diameter of 20 mm, and is inserted into the reinforcing bar socket fixing module to form a stable processing pool sidewall structure.

[0019] The road rainwater runoff treatment system of the present invention comprises a primary treatment tank, a secondary treatment tank, and a tertiary treatment tank, wherein the rainwater introduction port of the primary treatment tank is placed at one end of the road of the temporary traffic lane. For the direction of rainwater runoff; the rainwater drain of the tertiary treatment tank is placed at one end of the green space, which is the discharge direction of the rainwater runoff.

[0020] Preferably, the first stage treatment tank rainwater inlet is made of coarse-grained gravel having a particle size of 50 mm to form a gravel

[0021] Preferably, the aquifer of the treatment tank is 100-250 mm, and the depth of the concave structure of the tertiary treatment tank is greater than 450 mm.

[0022] Preferably, the treatment pool cover layer is 50-80 mm deep and is covered with bark.

[0023] Preferably, the processing plant has a soil depth of about 250 mm, and the mixed soil is selected, and the ratio of the common soil to the peat is 2:1. [0024] Preferably, the depth of the artificial filler layer of the treatment tank is 500-1200 mm, and the furnace or gravel having a permeability coefficient of not less than 10 ⁵ m/s is selected for infiltration.

[0025] Preferably, the processing pool artificial filler layer and the planting soil layer are separated by 200-250 g/m ² geotextile

[0026] The present invention also discloses an application of the above-described sponge urban modular road rainwater runoff treatment system for treating urban rainwater and a method for treating rainwater using the above-described sponge urban modular road rainwater runoff treatment system, including the following steps The road surface rainwater is filtered from the rainwater inlet through the gravel layer and then enters the primary treatment tank. After the primary treatment, it enters the secondary treatment tank and enters the tertiary treatment tank after the secondary treatment. Preferably, the flow direction of the rainwater in the secondary treatment tank is S-shaped flow direction, and the depth of the tertiary treatment tank is greater than that of the primary treatment tank and the secondary treatment tank; the rainwater discharged through the tertiary treatment is discharged from the rainwater outlet.

[0027] The value of the system of the present invention lies in that a modular kerb stone that is conveniently loaded, unloaded, and quickly combined is used to separate different levels of treatment pools, and different functions of different levels of treatment pools are used for road rainwater purification treatment to form a sponge-based city. The road rainwater runoff treatment system optimizes the treatment process of road rainwater runoff. As a supplementary item in the low-impact burst technology field, the system of the invention plays an important role in the interception, purification and deceleration treatment of the initial rainwater runoff of the road, reduces the pollution of the rainwater runoff to the streetside vegetation, reduces the peak flow, and alleviates the rapid rainwater runoff. The damage caused by the increase of retention rate and infiltration rate. .

Advantageous effects of the invention

Beneficial effect

[0028] The system of the invention designs a precast concrete modular curb, the "T" structure increases the friction between the modules, the steel bar is inserted into the steel bar to facilitate the connection and fixed molding, and the modular system components provide an infinite combination of processing pools. The design is flexible, the facilities are simple, the cost is low, the loading and unloading is convenient, the construction is short, and the management is convenient. Any weather installation will not affect the quality of the project. The materials and operation processes are environmentally friendly and ecologically sustainable, and have good landscape effects.

[0029] The invention combines the low-impact burst technology of the sponge city, and utilizes the natural characteristics, combined with the filtration, retention, penetration and purification effects of the plant and the soil on the rainwater, optimizes the initial treatment means of the road rainwater runoff. Using the mouth of the modular curb stone as the rainwater guide port, the rainwater bow I is taken into the treatment tank to intercept the decontamination and infiltration, and the same as the rainwater outlet to discharge into the green space, slowing down the runoff speed of the rainwater and reducing the pressure of the stormwater on the drainage pipe. , try to avoid direct discharge of rainwater into the municipal pipeline, and achieve the effect of peak-to-peak emission reduction. 涝 and non-point source pollution and solve the problem of road rainwater runoff problems.

[0030] The system treatment pool of the invention realizes the initial purification of road rainwater, and the treatment pool of three levels of different elevations realizes the "S" type diversion of rainwater, which not only makes the rainwater not return, but also prolongs the rainwater in the treatment pool. Flowing through the daytime, it promotes the interception and infiltration of rainwater in the treatment tank, and increases the storage capacity of the treatment tank.

[0031] The system treatment pool of the invention adopts mixed soil as a planting layer, which can improve the permeability of the soil foundation and the nutrients of the soil foundation; the bark cover layer effectively maintains the humidity and temperature of the soil, and creates a microbial environment, which is beneficial to microorganisms. The growth and degradation of organic matter also help to reduce the erosion of runoff rainwater; the artificial filler layer of the bottom layer also has the function of filtering rainwater, so that the rainwater as a supplementary groundwater penetrates into clean water. Brief description of the drawing

DRAWINGS

1 is a schematic cross-sectional structural view of a modular curb module A of the present invention;

2 is a schematic cross-sectional view of a modular curb module B of the present invention;

3 is a schematic cross-sectional view of a modular curb module C of the present invention;

4 is a schematic perspective view of a modular curb module C of the present invention;

[0036] FIG. 5 is a schematic diagram of a system combination manner of Embodiment 1;

6 is a schematic diagram of a system combination manner of Embodiment 1;

7 is a schematic structural view of a primary treatment tank of the present invention;

8 is a schematic diagram of a system combination manner of Embodiment 2;

9 is a schematic diagram of a combination mode of the third embodiment;

[0041] wherein, 1, module A; 2, module B; 3, module C; 4, primary treatment pool; 5, secondary treatment tank; 6, tertiary treatment tank; 11, steel jack; 21; steel jack; 22, steel jack; 23, steel jack; 31, steel jack; 32, steel jack; 33, cornice; 41, gravel layer; 43, artificial filler layer; 44, planting soil layer; 45, covering layer; 46, aquifer; 47, plant layer; 48, geotextile; 51, secondary treatment tank unit A; 52, secondary treatment tank unit B; 53, secondary treatment Pool unit C; 61, rainwater outlet; 62, concave structure.

Embodiments of the invention

[0042] The principles and features of the system of the present invention are described below with reference to the accompanying drawings, and the examples are only used to explain the present invention. The system is not intended to limit the scope of the system of the present invention.

[0043] The modular road rainwater runoff treatment system based on the sponge city low impact burst technology of the embodiment includes a modular curb and a treatment pool. Referring to Figures 1 to 4, the precast concrete modules of the modular curb are in a "T" type structure, which is divided into modules Al, module B2, and module C3; the bottom of the two wings of the module A is provided with steel bars with a hole diameter of 20 mm and a depth of 220 mm. The jacks 11 and 12; the bottoms of the two wings of the module B are provided with steel rod insertion holes 21, 22, 23 with a hole diameter of 20 mm and a depth of 220 mm;; the bottom of the two wings of the module C is provided with a steel bar jack 31 having a hole diameter of 20 mm and a depth of 220 mm; 32. There is a mouth 33 with a width of 300mm and a depth of 150mm. The module A, module B and module C are connected by means of steel bars inserted into the steel bar socket.

[0044] Embodiment 1

[0045] The modular road rainwater runoff treatment system for sponge city is placed between the sidewalk and the roadway, and the treatment pool is set up in parallel roads. The horizontal slope of the leveling system is the same as the vertical slope of the road. The combination mode is shown in Figure 5. The arrow is rainwater. The processing pool is divided into a primary processing pool 4, a secondary processing pool 5, and a tertiary processing pool 6. The secondary processing pool includes a secondary processing pool unit A51, a secondary processing pool unit B52, and a secondary processing pool unit C53; The side wall of the treatment tank is made up of modular kerbstones through module A1, module B2 and module C3 in a combined manner. The module C is inserted into the treatment tank to divide the treatment tank, and the mouth is used as the overflow port. Placed in a diagonal position, the first-stage treatment pool and the third-stage treatment tank module C-port parallel road, the first-stage treatment pool module C 幵 mouth as the road rainwater inlet, and the 50mm coarse-grained gravel layer 41 The tertiary treatment tank is adjacent to the green area module C port as the rainwater outlet 61, and the bottom of the third-stage treatment tank is provided with a concave structure 62 having a depth greater than 450 mm, see FIG.

[0046] Referring to FIG. 7, a schematic diagram of a primary treatment tank structure, the treatment tank is provided with a 400 mm artificial filler layer 43 and a 250 mm planting soil layer 44, a 50 mm covering layer 45, a 200 mm aquifer layer 46, and a plant layer. 47. The artificial filler layer and the planting soil layer are separated by a layer of 200g/m ² geotextile 48; the secondary treatment tank and the tertiary treatment tank structure are consistent with the primary treatment tank.

[0047] In the embodiment, the artificial filler layer at the rainwater inlet is selected to be a furnace or gravel having a permeability coefficient of 10-5 m/s, and the planting soil layer is a mixed soil having a ratio of ordinary soil to peat of 2:1.

[0048] Road rainwater flows from the rainwater inlet into the gravel layer of the primary treatment tank to retain a large amount of solid waste, and selectively filters solid particulate matter impurities, the primary treatment tank plants assist in intercepting solid pollutants, and the primary treatment tank rainwater accumulates to The height of the cornice is entered into the secondary treatment tank through the primary treatment tank, and the secondary treatment tank is three. The basic unit guides the rainwater "S" type streamline through the diagonally placed cornice, which reduces the rainwater runoff of the road, prolongs the flow of rainwater in the treatment tank, and grows different types in the secondary treatment tank. The moisture-tolerant plants purify the water, reduce the concentration of organic pollutants in the runoff, absorb heavy metal ions, and remove pathogens. The rainwater runoff enters the tertiary treatment tank through the secondary treatment tank, and the concave setting makes the rainwater remain in the tertiary treatment tank, reducing the rainwater temperature and increasing the infiltration rate. Finally, the rainwater outlet is gently and cleanly discharged into the sidewalk blind ditch. Enter the green facility.

[0049] Embodiment 2

[0050] The system is placed between the road and the green space, and the treatment pool is arranged in parallel roads. The combination mode is shown in FIG. 8. The arrow is the rainwater flow direction, and the treatment pool is divided into the primary treatment pool 4, the secondary treatment pool 5, and the tertiary treatment pool. 6. The secondary treatment tank includes a secondary treatment tank unit, a secondary treatment tank unit B, and a secondary treatment tank unit C; the side wall of the treatment tank is assembled by modular kerbstone through module A1, module B2, and module C3. Combined, the module C is inserted to divide the treatment pool, the mouth is used as the overflow port, the mouth of the secondary treatment tank is placed at a diagonal position, and the first-stage treatment pool and the module C of the tertiary treatment tank are parallel roads. The first-stage treatment tank module C is used as a road rainwater inlet, and a coarse-grained gravel layer with a particle size of 50 mm is laid. The tertiary treatment tank is adjacent to the green area module C port as a rainwater outlet, and the third-stage treatment tank is provided with a concave structure at the bottom. , its depth is greater than 450mm

[0051] The treatment pool is consistent with the first embodiment, the road rainwater flows from the rainwater introduction port into the gravel layer of the primary treatment tank to retain a large amount of solid waste, and selectively filters solid particulate matter impurities, and the primary treatment tank plant assists in intercepting solid pollution. The primary treatment tank accumulates rainwater to the height of the rake. It enters the secondary treatment tank through the primary treatment tank. The secondary treatment tank is three basic units. The rainwater is guided by the diagonally placed cornice. Streamline

To reduce the rainwater runoff of the road, prolong the flow of rainwater in the treatment tank, plant different types of moisture-tolerant plants in the secondary treatment tank to purify the water, reduce the concentration of organic pollutants in the runoff, and adsorb heavy metal ions. Remove pathogens. The rainwater runoff enters the tertiary treatment tank through the secondary treatment tank, and the concave setting allows the rainwater to remain in the tertiary treatment tank 3, reducing the rainwater temperature and increasing the infiltration rate, and finally the rainwater outlet is gently and cleanly discharged into the green space.

[0052] Embodiment 3:

[0053] The system is placed in the road center separation zone, and the treatment pool is arranged in parallel roads. The combination mode refers to FIG. 9, and the arrow indicates the rainwater flow direction. The treatment pool is divided into a primary treatment tank 4, a secondary treatment tank 5, and a tertiary treatment tank 6 Second level The pool includes a secondary treatment tank unit A51, a secondary treatment tank unit B52, and a secondary treatment tank unit C53. The side wall of the treatment tank is formed by modular kerbstones through module eight, module B, and module C in a combined manner. Module C is inserted to divide the treatment pool, the mouth is used as the overflow port, the mouth in the secondary treatment tank is placed at a diagonal position, and the primary treatment pool and the third-stage treatment tank are parallel to the module C. The pool module C is used as a road rainwater inlet 41, and a coarse-grained gravel layer 42 having a particle size of 50 mm is laid. The third-stage treatment tank is not provided with a module C, and the bottom of the tertiary treatment tank is provided with a concave structure, and the depth thereof is greater than 450 mm.

[0054] The longitudinal slope of the leveling system is the same as the longitudinal slope of the road, and the primary treatment tank and the secondary treatment tank are consistent with the first embodiment; the 200mm sand layer and the 200mm gravel layer are laid under the artificial filler layer of the tertiary treatment tank, gravel A PVC overflow water pipe with a diameter of 10 mm is buried horizontally in the layer, and a PVC overflow pipe extending perpendicularly 20 mm above the aquifer is connected, and a gravel layer is selected as a screening gravel having a particle size of 15 mm, and the rest is the same as in the first embodiment.

[0055] road rainwater flows from the rainwater inlet into the gravel layer of the primary treatment tank to retain a large amount of solid waste, and selectively filters solid particulate matter impurities, the primary treatment tank plants assist in intercepting solid pollutants, and the primary treatment tank rainwater accumulates to The height of the cornice enters the secondary treatment tank through the first-stage treatment tank, and the secondary treatment tank is three basic units. The rainwater "S"-type streamline is guided through the diagonally placed cornice to play the road rainwater runoff. The deceleration treatment prolongs the flow of rainwater in the treatment tank, and the different types of moisture-tolerant plants are planted in the secondary treatment tank to purify the water, reduce the concentration of organic pollutants in the stormwater runoff, adsorb heavy metal ions, and remove pathogens. The rainwater runoff enters the tertiary treatment tank through the secondary treatment tank, and the concave setting makes the rainwater remain in the tertiary treatment tank, reducing the rainwater temperature and increasing the infiltration rate. Finally, the overflow pipe flows into the overflow water pipe gently and cleanly, and then flows in. Close to green areas or rivers and lakes.

[0056] The selection of the treatment plant should take full consideration of alkali resistance, salt resistance and pollution resistance. The arbor species can choose plants such as slash pine and weeping willow which are both resistant to drought and drought, have good adaptability and resistance to stress; Choose 15-30cm high herbaceous plants and high 30-45cm flower small shrubs, which can be planted with large flower sedges, sandy cypresses, stunned and other short-water-resistant plants that can purify and purify plants; wetlands and aquatic plants choose canna, Wick grass and so on. Plants that can be planted together can be considered, mainly based on native plants, which improve decontamination and ornamental, and are easy to survive.

[0057] It can be seen that the road rainwater runoff treatment system of the invention effectively improves the initial treatment process of road rainwater runoff in the sponge city, and the basic modulus of the system can be superimposed, and is applicable to various types of roadside rainwater runoff treatment systems, and has simple structure and flexible design. High performance, low cost, convenient loading and unloading, short construction, convenient management, easy access to materials, wide application range, strong practicability, great significance for the treatment of rainwater runoff in sponge city roads The use of small-scale processing facilities with linear grading to achieve initial purification of rainwater with small site disturbances, increase urban greening area, reduce urban impervious surface area, effectively utilize rainwater resources, and supplement rainwater as groundwater, avoiding Untreated rainwater runoff is directly discharged into the municipal pipe network, and the surface runoff is decelerated and depleted. The water supply system is self-purifying, and moisturizes diverse habitats, reducing physical impact damage to sites such as green spaces along the street. , with additional environmental and social benefits.

Claims

Claim

A modular urban road rainwater runoff treatment system for a sponge city, characterized in that the sponge urban modular road rainwater runoff treatment system comprises a modular curb stone and a treatment pool; the modular curb stone constitutes the treatment pool The side wall; the modular curb stone includes a module VIII, a module B, and a module C; the top of the module C is provided with a vent; the processing pool includes a primary treatment pool, a secondary treatment tank, and a tertiary treatment tank; A module _{C is} disposed between the primary treatment tank and the secondary treatment tank; a module _{C is} disposed between the secondary treatment tank and the tertiary treatment tank; the primary treatment tank is provided with a rainwater introduction port; the rainwater introduction port Features a gravel layer.

The modular urban road rainwater runoff treatment system for a sponge according to claim 1, wherein the module, the module B and the module C are all T-shaped structures; the processing pool comprises an artificial filler layer, a planting soil layer, and a covering a layer, an aquifer, a plant layer; the tertiary treatment tank is provided with a rainwater outlet; and the bottom of the tertiary treatment tank is provided with a concave structure.

The modular urban road rainwater runoff treatment system for a sponge according to claim 2, wherein the module A has a hole or an insert at a lower end of the left wing portion and the right wing portion; and a hole is formed at a lower end portion of the module B and a lower end portion of the right wing portion. Or a plug-in; the left side of the module C and the lower end of the right wing are provided with holes or inserts; the crushed stone layer is formed by gravel having a particle diameter of 50 mm; the thickness of the water storage layer is 100-250 mm; It is 50-80 mm; the thickness of the planting soil layer is 250 mm; and the thickness of the artificial filler layer is 500-1200 mm.

A modular urban road rainwater runoff treatment system for a sponge according to claim 3, wherein said module B has two holes at a lower end portion of the left wing portion or the right wing portion.

The modular urban road rainwater runoff treatment system for a sponge according to claim 1, wherein the secondary treatment pool is composed of a secondary treatment tank unit A, a secondary treatment pool unit B, and a secondary treatment pool unit C; a module C is disposed between the secondary processing pool unit A and the secondary processing pool unit B; a module C is disposed between the secondary processing pool unit C and the secondary processing pool unit B; Unit A is adjacent to the primary processing pool; the secondary processing pool unit C is adjacent to the tertiary processing pool.

The modular urban road rainwater runoff treatment system for a sponge city according to claim 5, wherein the module C disposed between the secondary treatment pool unit A and the secondary treatment pool unit B The cornice is connected to the secondary processing unit. The ports of the module C disposed between the secondary treatment tank units B are located in different vertical planes, preferably in diagonal directions; the mouthpiece of the module C is disposed between the primary treatment tank and the secondary treatment tank The ports of the module C disposed between the secondary processing unit and the secondary processing unit B are located in different vertical planes; the module C is disposed between the secondary processing pool and the tertiary processing pool The ports of the module C provided between the mouthpiece and the secondary treatment tank unit C and the secondary treatment tank unit B are located in different vertical planes.

[Claim 7] A processing pool module for a modular road rainwater runoff treatment system, wherein the processing pool module comprises an artificial filler layer, a planting soil layer, a covering layer, an aquifer layer, a plant layer; Separated from the geotextile layer in the middle of the planting soil.

[Claim 8] A method for treating rainwater by using a modular urban road rainwater runoff treatment system according to claim 1, comprising the steps of: the road surface rainwater is filtered from the rainwater introduction port through the gravel layer and then enters the primary treatment tank. After the first-stage treatment, it enters the secondary treatment tank, and after the secondary treatment, enters the tertiary treatment tank.

[Claim 9] The method for treating rainwater according to claim 8, wherein the flow direction of the rainwater in the secondary treatment tank is an S-shaped flow direction, and the depth of the tertiary treatment tank is greater than that of the primary treatment tank and the secondary treatment Pool.

[Claim 10] The application of the modular urban road rainwater runoff treatment system for sponge city in treating urban rainwater.