Urban road waterlogging prevention and control and rainwater regulation and storage system

Abstract

The utility model discloses an urban road waterlogging prevention and rainwater regulation and storage system which comprises a permeable pavement belt, a grass planting ditch and a rainwater garden which are arranged on at least one side of an urban road, the permeable pavement belt is arranged on the side edges of the grass planting ditch and the rainwater garden, the grass planting ditch and the rainwater garden are arranged on the same path at intervals, turf is planted on the grass planting ditch, and the rainwater garden is arranged in the grass planting ditch. The middle part of the grass planting ditch is lower than two sides of the grass planting ditch, and the grass planting ditch is provided with a diversion slope leading to an adjacent rainwater garden on the same path. The combined design of the permeable paving belt, the grass planting ditch and the rainwater garden is utilized. The permeable pavement belt is used for rapid water permeation, the grass planting ditch is used for collecting and transferring rainwater, the rainwater garden is used for collecting, regulating, storing and purifying runoff rainwater of adjacent roadways, sidewalks, non-motorized vehicle lanes and green belts along the line, the effects of solving road catchment, controlling runoff and purifying water are achieved, and by means of the road green space, the regulation and storage efficiency is high; the maintenance cost is low, and rainwater can be effectively purified.

Description

Technical Field

[0001] This utility model relates to the field of urban flood control technology, and in particular to an urban road flood control and rainwater storage system. Background Technology

[0002] To address urban road flooding, various rainwater harvesting measures have been implemented. A common approach is the construction of permeable pavements. Permeable pavements allow rainwater to quickly infiltrate into the ground, reducing surface runoff. However, in practical applications, permeable pavements have also revealed some drawbacks. Initial rainwater typically carries large amounts of pollutants such as dust, oil, and debris. These pollutants easily clog the pores of the permeable pavement, reducing its permeability. Over time, the permeability gradually weakens, and may even completely disappear, requiring frequent cleaning and maintenance.

[0003] In summary, existing urban road flood control and rainwater storage systems have many shortcomings in practical applications, failing to meet the growing demands of urban development and cope with increasingly frequent extreme rainfall. Therefore, developing an urban road flood control and rainwater storage system with high storage efficiency, low maintenance costs, and effective rainwater purification is of significant practical importance and urgency, playing an indispensable role in enhancing urban disaster prevention and mitigation capabilities and ensuring sustainable urban development. Utility Model Content

[0004] This application proposes the following technical solution:

[0005] A system for preventing urban road flooding and storing rainwater includes a permeable pavement strip, a grassed swale, and a rain garden located on at least one side of an urban road. The permeable pavement strip is located on the side of the grassed swale and the rain garden. From top to bottom, the permeable pavement strip consists of a permeable asphalt layer, an adhesive layer, a permeable concrete layer, and a permeable gravel layer. The permeable gravel layer transitions to the grassed swale. The grassed swale and the rain garden are spaced apart along the same path. The grassed swale is planted with turf and has a cross-sectional layout that is low in the middle and high on both sides. The grassed swale includes a buffer zone with sloping sides and a flat depression in the middle. The grassed swale has a guide slope leading to the adjacent rain garden along the same path.

[0006] Furthermore, the rain garden consists of a water storage layer, a biological filtration layer, a filter geotextile, and a garden gravel layer from top to bottom. A rainwater well is located in the middle of the rain garden, and the wellhead is higher than the water storage layer. The interior of the rainwater well is equipped with a pipe leading to the rainwater regulation and storage system.

[0007] Furthermore, it also includes a rainwater storage system, which comprises:

[0008] A safety diversion well, wherein the rainwater well is connected to the safety diversion well via an inlet pipe;

[0009] The rainwater storage tank is connected to the safety diversion well through a water distribution pipe. The rainwater storage tank includes a main body and PP rainwater modules, with the PP rainwater modules stacked inside the main body.

[0010] The finished product outlet well is located in the middle of the rainwater storage tank and includes an outlet well body, an empty pump, a liquid level controller, and a drain pipe. The empty pump is located at the bottom of the outlet well body, the liquid level controller extends from the top of the outlet well body to the bottom of the outlet well body, one end of the drain pipe is connected to the empty pump, and the other end of the drain pipe extends from the outlet well body to the outside.

[0011] The rainwater control box is connected to the liquid level controller via a signal line, and is also electrically connected to the drain pump.

[0012] Furthermore, the safety diversion well also includes an overflow pipe, which is connected to the safety diversion well and leads to the municipal drainage pipe.

[0013] Furthermore, the bottom of the rain garden is also provided with impermeable geotextile and / or two layers of geotextile and one layer of membrane.

[0014] Furthermore, the upper part of the rainwater well is equipped with a turbine-type rainwater inlet.

[0015] Furthermore, the permeable gravel layer of the permeable pavement strip is provided with pipes leading to the rain garden.

[0016] Furthermore, a curb strip is provided between the permeable paving strip and the rain garden.

[0017] Furthermore, it also includes a sidewalk, which is arranged in parallel with the permeable pavement strip. The sidewalk consists of permeable bricks, a coarse sand layer, a permeable concrete layer, and a gravel layer from top to bottom. A curb is provided between the sidewalk and the permeable pavement strip.

[0018] Furthermore, the area ratio of the grassed swale to the rain garden is 5:1.

[0019] This utility model provides an urban road flood control and rainwater storage system, which has the following beneficial effects:

[0020] This application primarily utilizes a "permeable paving + bioretention strip" technology, which comprises permeable paving strips, vegetated swales, and rain gardens. The vegetated swales connect to the rain garden facilities, collecting and transferring rainwater to the rain gardens while also providing infiltration, storage, and purification functions. The rain gardens are mainly responsible for collecting and treating runoff from adjacent roadways, sidewalks, non-motorized vehicle lanes, and green belts along the route. Collected rainwater is preferentially treated through infiltration for water quality and quantity. Rainwater exceeding infiltration capacity is continuously accumulated in the rain gardens. As the water level increases, excess rainwater can overflow and be discharged through the rain gardens. This application effectively addresses road runoff, controls runoff, and purifies water quality. Utilizing roadside green space not only provides high storage efficiency and low maintenance costs but also effectively purifies rainwater, comprehensively improving water storage, drainage, and purification capabilities. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall layout of an embodiment of this application;

[0022] Figure 2 This is a cross-sectional view of the rain garden in the embodiments of this application;

[0023] Figure 3 This is a cross-sectional view of the grassed swale in the embodiment of this application;

[0024] Figure 4 This is a cross-sectional view of the rainwater storage system in the embodiments of this application;

[0025] Figure 5 This is a cross-sectional view of the finished water outlet well in the embodiment of this application.

[0026] The labels in the attached diagrams are explained as follows:

[0027] 1-Permeable pavement strip; 11-Permeable asphalt layer; 12-Adhesive layer; 13-Permeable concrete layer of pavement strip; 14-Permeable crushed stone layer;

[0028] 2-Vegetated swale; 21-Buffer zone; 22-Low-lying area; 23-Diversion slope;

[0029] 3-Rain garden; 31-Water storage layer; 32-Biofiltration layer; 33-Filter geotextile; 34-Garden gravel layer; 35-Rain well; 351-Turbine-type rain inlet; 36-Imperible geotextile / two layers of fabric and one membrane;

[0030] 4-Rainwater storage system; 41-Safety diversion well; 411-Overflow pipe; 42-Rainwater storage tank; 421-Main body of storage tank; 422-PP rainwater module; 43-Finished water outlet well; 431-Main body of outlet well; 432-Drain pump; 433-Level controller; 434-Drainage pipe; 44-Rainwater control box; 45-Inlet pipe; 46-Distribution pipe;

[0031] 5-Embedded curb; 6-Sidewalk; 61-Permeable brick; 62-Coarse sand layer; 63-Permeable concrete layer for sidewalk; 64-Gravel layer for sidewalk; 7-Cutting stone. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. It should be understood that this application is not limited to the exemplary embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0033] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Example 1

[0036] refer to Figure 1-3 This application provides an urban road flood control and rainwater storage system, including a permeable pavement strip, a vegetated swale, and a rain garden installed on at least one side of the urban road. The permeable pavement strip is located on the side of the vegetated swale and the rain garden. From top to bottom, the permeable pavement strip consists of a permeable asphalt layer, an adhesive layer, a permeable concrete layer, and a permeable gravel layer, with the permeable gravel layer transitioning to the vegetated swale. The design of the permeable pavement strip combined with the vegetated swale and rain garden not only improves permeability but also provides preliminary filtration and infiltration guidance of rainwater through a layered structure.

[0037] Grassed swales and rain gardens are spaced apart along the same path. The swales are planted with turf and have a cross-sectional layout that is lower in the middle and higher on both sides. Each swale includes a buffer zone sloping down on both sides and a flat, low-lying area in the middle. A guide slope leading to the adjacent rain garden is provided along the same path. The swales, with their longitudinal slopes, allow rainwater from the buffer zones on both sides to flow into the low-lying area and then through the guide slopes to the rain gardens. This structure effectively slows down rainwater flow, increases rainwater retention time, and purifies rainwater through the filtering effect of the turf. In this embodiment, the flow direction of the swales is divided by the midpoint between the rain gardens. When the road longitudinal direction is large, the length of the swales can be adjusted appropriately to reduce the length of the swales downstream of the road that flows back into the rain garden.

[0038] The rain garden consists of a water storage layer, a biological filtration layer, a filter geotextile, and a garden gravel layer from top to bottom. A rainwater well is located in the middle of the rain garden, with the wellhead above the water storage layer. The inside of the rainwater well is equipped with pipes leading to the rainwater storage system.

[0039] As the uppermost layer of the rain garden, the water storage layer directly receives rainwater from the grassed swale slope and the permeable paving strip after infiltration, playing a preliminary role in water storage. It can temporarily store a large amount of rainwater during rainfall, relieving pressure on the drainage system.

[0040] The biological filtration layer is immediately adjacent to the water storage layer. This layer is filled with media capable of adsorbing and degrading pollutants, such as activated carbon and humus, and planted with various water-tolerant plants. As rainwater infiltrates from top to bottom, the media adsorbs suspended solids, heavy metals, and other pollutants from the rainwater, while the plant roots absorb nutrients such as nitrogen and phosphorus. Through both biological and physical processes, the rainwater is deeply purified, improving its quality and laying the foundation for subsequent resource utilization.

[0041] The filter geotextile is laid below the biofiltration layer. Its function is to prevent the media particles in the upper layer from entering the lower layer, while allowing rainwater purified by the biofiltration layer to pass through smoothly. It plays a role in isolation and further filtration, ensuring the stability of the rain garden structure and the continuity of the filtration effect.

[0042] The garden gravel layer is located at the bottom of the rain garden. The gravel has large pores, which not only allows rainwater to further infiltrate and filter, but also serves as a temporary storage space for rainwater, holding more rainwater during heavy rainfall. At the same time, the good permeability of the gravel layer helps rainwater to slowly infiltrate and avoid water accumulation.

[0043] The rainwater well located in the center of the rain garden is a key component of the entire system for effective rainwater discharge and storage. The wellhead is higher than the water storage layer; this design prevents rainwater from the storage layer from entering the well directly without sufficient purification and sedimentation, ensuring relatively clean water quality. The well contains pipes leading to the rainwater storage system. These pipes can discharge purified rainwater to other storage facilities within the system, or, during dry periods, reuse the stored rainwater for road spraying, green space irrigation, etc., achieving rational allocation and efficient utilization of rainwater, further enhancing the functionality and practicality of the entire urban flood control and rainwater storage system.

[0044] Specifically, in this embodiment, the area ratio of the grassed swale to the rain garden is 5:1. The grassed swale is a transfer-type grassed swale used to connect the rain garden facilities. During rainfall, the grassed swale collects and transfers rainwater to the rain garden, while also possessing certain infiltration, storage, and purification functions. The rain garden is mainly responsible for collecting and treating runoff rainwater from adjacent driveways, sidewalks, non-motorized vehicle lanes, and green belts along the route. The collected rainwater is preferentially treated for water quality and quantity through infiltration. Rainwater exceeding the infiltration capacity continues to accumulate in the water storage layer. As the water storage height further increases, excess rainwater will overflow directly into the municipal rainwater pipes or rainwater storage system through rainwater wells. In this embodiment, the overflow outlet of the rainwater well is 20cm above the bottom of the water storage layer and below the horizontal height of the permeable pavement strip.

[0045] In some preferred embodiments, the bottom of the rain garden is further provided with impermeable geotextile and / or a two-layer geotextile-one-membrane structure. Both impermeable geotextile and the two-layer geotextile-one-membrane structure possess excellent impermeability. The impermeable geotextile is made of fibrous material and formed by needle punching or thermal bonding, possessing high strength and good permeability and filtration properties, while effectively blocking water infiltration. The two-layer geotextile-one-membrane structure is composed of two layers of geotextile and one layer of polyethylene membrane, and its impermeability is even more outstanding. The polyethylene membrane can greatly prevent water penetration, and the geotextiles on both sides not only protect the membrane material in the middle from damage by sharp objects, but also enhance the overall mechanical properties and stability of the material.

[0046] By installing impermeable geotextile and / or a two-layer geotextile and one-membrane system, rain gardens can effectively intercept rainwater within the system, ensuring that rainwater is purified, stored, and discharged according to the designed path through each layer of the structure. This not only enhances the rain garden's rainwater regulation capacity, enabling it to cope more efficiently with rainfall of varying intensities, but also avoids a series of environmental and safety hazards caused by disorderly rainwater infiltration, achieving effective protection of groundwater resources. Simultaneously, this design also ensures the subsequent resource utilization of rainwater, allowing purified rainwater to be precisely allocated through rainwater wells and pipes for applications such as road cleaning and green space irrigation, fully leveraging the economic and ecological benefits of the rainwater regulation system.

[0047] In some preferred embodiments, a turbine-type rainwater inlet is provided at the top of the rainwater well. Its appearance is typically circular or polygonal, with spiral guide vanes inside, resembling a turbine. When rainwater flows through the turbine-type rainwater inlet, guided by the guide vanes, the rainwater forms a rotating flow. This rotational motion greatly increases the flow velocity and kinetic energy of the rainwater. On the one hand, the high-speed rotating water flow significantly improves rainwater collection efficiency, quickly lowering the water level in the reservoir and reducing the risk of flooding. On the other hand, the centrifugal force generated by the rotating water flow throws larger debris in the rainwater towards the inner wall of the rainwater inlet, causing it to slide down the inner wall to the bottom of the rainwater well or be intercepted in a specific filtration area, preventing debris from clogging the rainwater inlet and ensuring unobstructed rainwater collection. Furthermore, the turbine-type rainwater inlet design also has excellent self-cleaning capabilities. Under the continuous flushing of the rotating water flow, dirt, silt, and other fine debris adhering to the inner wall of the rainwater inlet and the guide vanes are also promptly washed away, reducing the frequency of manual cleaning and maintenance costs.

[0048] In some preferred embodiments, the permeable gravel layer of the permeable pavement strip is equipped with pipes leading to the rain garden. The main function of the permeable pavement strip is to rapidly infiltrate rainwater from the road surface. Through layers of filtration including the permeable asphalt layer, the adhesive layer, and the permeable concrete layer of the pavement strip, the rainwater is initially purified before being introduced into the permeable gravel layer. However, relying solely on the permeable gravel layer's own permeability, when rainfall exceeds its infiltration threshold, rainwater easily accumulates in the permeable gravel layer, leading to a decrease in the overall permeability efficiency of the permeable pavement strip, and even causing backflow on the road surface. By setting pipes leading to the rain garden in the permeable gravel layer, excess rainwater can be promptly diverted to the rain garden. The rain garden, acting as a "reservoir" and "purifier" in the system, has a water storage layer, a biological filtration layer, and other structures that can further store and deeply purify this portion of rainwater. This design not only optimizes the rainwater infiltration path and avoids the functional failure of permeable pavement due to rainwater accumulation, but also makes full use of the rain garden's storage capacity, enhancing the entire system's ability to cope with heavy rain.

[0049] In some preferred embodiments, a kerb is installed between the permeable pavement strip and the rain garden. The permeable pavement strip consists of multiple layers of permeable material, and its edge areas are prone to loosening or displacement under load and rainwater erosion. The kerb is typically made of concrete or metal and is fixed between the two by embedded installation or bolts, forming a continuous rigid constraint. This design not only effectively resists lateral forces generated by compaction but also prevents the permeable pavement strip from collapsing due to softening of the substrate caused by long-term rainwater infiltration, ensuring the structural integrity of the entire system.

[0050] In some preferred embodiments, a sidewalk is also included, which is arranged parallel to the permeable pavement strip. From top to bottom, the sidewalk consists of permeable bricks, a coarse sand layer, a permeable concrete layer, and a gravel layer. A curb is provided between the sidewalk and the permeable pavement strip. The permeable bricks are located on the top layer, directly in contact with pedestrians. Their surface has numerous interconnected pores, allowing for rapid absorption of rainwater splashed by pedestrians or vehicles. The coarse sand layer serves to level and aid permeability, ensuring the permeable bricks are laid flat and quickly guiding rainwater through them to the lower layers. The permeable concrete layer has high strength and permeability, capable of withstanding the loads of pedestrians and non-motorized vehicles while allowing rainwater to pass smoothly. The bottom gravel layer has larger pores, allowing for further rainwater infiltration and serving as a temporary storage space to buffer the infiltration rate during heavy rainfall, preventing sudden groundwater overload.

[0051] Example 2

[0052] refer to Figure 4-5 In this embodiment, a rainwater storage system is also included, which includes:

[0053] The safety diversion well is connected to the rainwater well via an inlet pipe. Rainwater flows into the safety diversion well from the external inlet pipe and is then diverted. Under normal circumstances, the main flow will enter the rainwater storage tank through the distribution pipe.

[0054] The rainwater storage tank is connected to the safety diversion well via a distribution pipe. The rainwater storage tank consists of a main body and PP rainwater modules, which are stacked inside the main body. The PP rainwater modules are rectangular in shape and are mainly made of recycled PP polypropylene. Multiple PP rainwater modules are stacked and filled inside the main body of the storage tank.

[0055] The finished water outlet well is located in the middle of the rainwater storage tank. It includes the well body, an empty pump, a level controller, and a drain pipe. The empty pump is at the bottom of the well body. The level controller extends from the top of the well body to the bottom. One end of the drain pipe is connected to the empty pump, and the other end extends from the well body to the outside.

[0056] The rainwater control box is connected to the level controller via a signal line, which transmits level information to the rainwater control box. The rainwater control box is also electrically connected to an emptying pump, allowing it to pump water for use or discharge it into a sewage well or rainwater well when not in use.

[0057] In some preferred embodiments, the safety diversion well also includes an overflow pipe connected to the safety diversion well and leading to the municipal drainage system. When the water flow exceeds the carrying capacity, the excess water will flow through the overflow pipe into a sewage well or stormwater well downstream of the municipal drainage system.

[0058] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0059] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0060] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A system for preventing urban road flooding and storing rainwater, comprising a permeable pavement strip, a grassed swale, and a rain garden installed on at least one side of the urban road, characterized in that: The permeable pavement strip is set on the side of the grassed swale and the rain garden. The permeable pavement strip consists of a permeable asphalt layer, an adhesive layer, a permeable concrete layer and a permeable gravel layer from top to bottom. The permeable gravel layer is connected and transitioned to the grassed swale. The grassed swales and the rain garden are spaced apart on the same path. The grassed swales are planted with turf and have a cross-section that is low in the middle and high on both sides. The grassed swales include buffer zones with sloping sides and a flat depression in the middle. The grassed swales are provided with a guide slope leading to the adjacent rain garden on the same path.

2. The urban road flood control and rainwater storage system according to claim 1, characterized in that, The rain garden consists of a water storage layer, a biological filtration layer, a filter geotextile, and a garden gravel layer from top to bottom. A rainwater well is located in the middle of the rain garden, and the wellhead is higher than the water storage layer. The interior of the rainwater well is equipped with a pipe leading to the rainwater storage system.

3. The urban road flood control and rainwater storage system according to claim 2, characterized in that, It also includes a rainwater storage system, which comprises: A safety diversion well, wherein the rainwater well is connected to the safety diversion well via an inlet pipe; The rainwater storage tank is connected to the safety diversion well through a water distribution pipe. The rainwater storage tank includes a main body and PP rainwater modules, with the PP rainwater modules stacked inside the main body. The finished product outlet well is located in the middle of the rainwater storage tank and includes an outlet well body, an empty pump, a liquid level controller, and a drain pipe. The empty pump is located at the bottom of the outlet well body, the liquid level controller extends from the top of the outlet well body to the bottom of the outlet well body, one end of the drain pipe is connected to the empty pump, and the other end of the drain pipe extends from the outlet well body to the outside. The rainwater control box is connected to the liquid level controller via a signal line, and is also electrically connected to the drain pump.

4. The urban road flood control and rainwater storage system according to claim 3, characterized in that, The safety diversion well also includes an overflow pipe, which is connected to the safety diversion well and leads to the municipal drainage pipeline.

5. A system for preventing urban road flooding and storing rainwater according to claim 2, characterized in that, The bottom of the rain garden is also equipped with impermeable geotextile and / or two layers of geotextile and one layer of membrane.

6. A system for preventing urban road flooding and storing rainwater according to claim 2, characterized in that, The upper part of the rainwater well is equipped with a turbine-type rainwater inlet.

7. A system for preventing urban road flooding and storing rainwater according to claim 1, characterized in that, The permeable gravel layer of the permeable pavement strip is provided with pipes leading to the rain garden.

8. A system for preventing urban road flooding and storing rainwater according to claim 1, characterized in that, A curb strip is provided between the permeable paving strip and the rain garden.

9. A system for preventing urban road flooding and storing rainwater according to claim 1, characterized in that, It also includes a sidewalk, which is arranged in parallel with the permeable pavement strip. The sidewalk consists of permeable bricks, a coarse sand layer, a permeable concrete layer, and a gravel layer from top to bottom. A curb is provided between the sidewalk and the permeable pavement strip.

10. A system for preventing urban road flooding and storing rainwater according to claim 1, characterized in that, The area ratio of the grassed swale to the area of ​​the rain garden is 5:1.

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