Urban structure combining permeable pavement of sidewalk with rainwater garden sponge
By setting up a rainwater garden structure in the permeable pavement of the sidewalk and using seepage pipes to transport rainwater to the rainwater garden, the problem that the permeable sidewalk structure in the existing technology failed to introduce rainwater into the sponge storage system, and the utilization efficiency of sponge facilities has been improved and the effect of purifying the surface runoff water quality.
Patent Information
- Application Number
- CN202420433143.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-05
AI Technical Summary
In the existing sponge urban road drainage system, the permeable sidewalk structure introduces rainwater into the municipal pipeline network, but does not enter the sponge storage system, resulting in the low utilization efficiency of the sponge storage system.
A permeable pavement on the sidewalk combined with the sponge urban structure of the rainwater garden is designed. By setting up a rainwater garden structure on one side of the permeable sidewalk structure, the rainwater is transported to the rainwater garden structure using seepage pipes to achieve the collection and purification of rainwater.
The water collection capacity of the rainwater garden structure has been improved, the utilization efficiency of urban sponge facilities has been enhanced, and the surface runoff water quality has been effectively purified.
Smart Images
Figure CN222455718U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of rainwater treatment, and more specifically, to a sponge city structure that combines permeable sidewalk pavement with a rainwater garden. Background Art
[0002] Rainwater garden is a widely used technical measure in sponge city construction. It is an effective dryland rainwater runoff regulation technology that imitates the rainwater infiltration function in nature. It is used to collect and absorb rainwater from roofs or the ground, and purify rainwater through the combined effects of plants and sand. Rainwater garden can effectively reduce the peak of urban surface runoff, delay municipal drainage pressure, promote rainwater infiltration, improve local microclimate, and effectively improve the livability of the city.
[0003] However, in the existing sponge city road drainage system, the permeable sidewalk structure introduces rainwater into the municipal pipeline network through infiltration pipes, and the rainwater does not enter the sponge retention system. The rainwater garden can only collect rainwater in a small surrounding area, resulting in the sponge retention system not achieving maximum utilization efficiency. Utility Model Content
[0004] The purpose of this application is to provide a sponge city structure of a permeable sidewalk pavement combined with a rain garden, which improves the water collection capacity of the rain garden structure, thereby improving the utilization efficiency of urban sponge facilities and effectively purifying the water quality of surface runoff.
[0005] This application is implemented as follows:
[0006] The present application provides a sponge city structure of permeable sidewalk pavement combined with rain garden, which includes a permeable sidewalk structure and a rain garden structure arranged on one side of the permeable sidewalk structure, wherein the permeable sidewalk structure includes a permeable brick surface layer, a coarse sand leveling layer, a first permeable geotextile layer, a permeable cement concrete base layer and a crushed stone base layer arranged in sequence from top to bottom, wherein at least one infiltration pipe is buried in the crushed stone base layer; the rain garden structure includes a covering layer, a planting soil layer, a sand layer, a second permeable geotextile layer and a gravel layer arranged in sequence from top to bottom, wherein at least one drainage pipe is buried in the gravel layer, wherein a plurality of permeable holes arranged at intervals are opened on the drainage pipe; the rain garden structure is also provided with at least one overflow rainwater outlet with a bottom extending to the gravel layer; the infiltration pipe is used to transport rainwater to the surface of the covering layer.
[0007] In some optional embodiments, a slope is provided on one side of the rain garden structure, the covering layer is located at the bottom of the slope, and the outlet of the infiltration pipe is located on the slope.
[0008] In some optional embodiments, an impermeable membrane is provided at the bottom of the crushed stone base layer.
[0009] In some optional embodiments, the top of the overflow gully is provided with a guard.
[0010] In some optional implementation schemes, a liftable mud collecting plate is provided at the bottom of the overflow gully, and a lifting ear is provided at the top of the mud collecting plate.
[0011] In some optional implementation schemes, the inner wall of the overflow type rainwater outlet is provided with a slide groove extending along its height direction, and the mud accumulation plate is provided with a limiting sliding block slidingly arranged in the slide groove.
[0012] In some optional embodiments, a hook is provided on the inner wall at the top of the overflow gully, and a lifting ear is connected to one end of a lifting chain, and the other end of the lifting chain is detachably connected to the hook.
[0013] In some optional embodiments, the drain pipe is connected to the overflow stormwater inlet through a water pipe.
[0014] In some optional embodiments, the height of the crushed stone subbase in the soil layer is greater than the height of the covering layer in the soil layer.
[0015] The beneficial effects of the present application are as follows: the permeable pavement combined with rain garden sponge city structure provided by the present application comprises a permeable pavement structure and a rain garden structure arranged on one side of the permeable pavement structure, the permeable pavement structure comprises a permeable brick surface layer, a coarse sand leveling layer, a first permeable geotextile layer, a permeable cement concrete base layer and a crushed stone base layer arranged in sequence from top to bottom, at least one seepage pipe is buried in the crushed stone base layer; the rain garden structure comprises a covering layer, a planting soil layer, a sand layer, a second permeable geotextile layer and a gravel layer arranged in sequence from top to bottom, at least one drainage pipe is buried in the gravel layer, and a plurality of permeable holes arranged at intervals are opened on the drainage pipe; the rain garden structure is also provided with at least one overflow rainwater outlet with the bottom extending to the gravel layer; the seepage pipe is used to transport rainwater to the surface of the covering layer. The permeable pavement combined with rain garden sponge city structure provided by the present application improves the water collection capacity of the rain garden structure, thereby improving the utilization efficiency of urban sponge facilities and effectively purifying the water quality of surface runoff. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 A partial cross-sectional structural schematic diagram of a permeable sidewalk pavement combined with a rainwater garden sponge city structure provided in Example 1 of the present application;
[0018] Figure 2This is a partial cross-sectional structural schematic diagram of the permeable sidewalk pavement combined with the rain garden sponge city structure provided in Example 2 of the present application.
[0019] In the figure: 100, permeable sidewalk structure; 110, permeable brick surface layer; 120, coarse sand leveling layer; 130, first permeable geotextile layer; 140, permeable cement concrete base layer; 150, crushed stone base layer; 160, seepage pipe; 170, anti-seepage membrane; 200, rain garden structure; 210, covering layer; 220, planting soil layer; 230, sand layer; 240, second permeable geotextile layer; 250, gravel layer; 260, drainage pipe; 270, overflow rainwater inlet; 271, mud accumulation board; 272, lifting ear; 273, slide; 274, limit slider; 275, hook; 276, lifting chain; 280, enclosure; 300, slope. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0023] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0024] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0025] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0026] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0027] The following is a further detailed description of the characteristics and performance of the permeable sidewalk pavement combined with the rain garden sponge city structure of the present application in conjunction with the embodiments.
[0028] Example 1
[0029] like Figure 1As shown, the present application provides a sponge city structure of a permeable sidewalk combined with a rain garden, which includes a permeable sidewalk structure 100 and a rain garden structure 200 arranged on one side of the permeable sidewalk structure 100. The permeable sidewalk structure 100 includes a permeable brick surface layer 110, a coarse sand leveling layer 120, a first permeable geotextile layer 130, a permeable cement concrete base layer 140 and a crushed stone subbase layer 150 arranged in sequence from top to bottom. A seepage pipe 160 extending along the width direction of the crushed stone subbase layer 150 is buried, and an anti-seepage membrane 170 is provided at the bottom of the crushed stone subbase layer 150; the rain garden structure 200 includes a covering layer 210, a planting soil layer 220, a sand layer 230 arranged in sequence from top to bottom. 230, a second permeable geotextile layer 240 and a gravel layer 250, a drainage pipe 260 extending along the length of the gravel layer 250 is buried in the gravel layer 250, and the drainage pipe 260 is provided with permeable holes arranged at intervals; the rain garden structure 200 is also provided with an overflow type rainwater outlet 270 whose bottom extends to the gravel layer 250, a enclosure 280 is provided on the top of the overflow type rainwater outlet 270, and the bottom of the overflow type rainwater outlet 270 is connected to the municipal pipeline network; a slope 300 is provided between the permeable sidewalk structure 100 and the rain garden structure 200, the cover layer 210 is located at the bottom of the slope 300, and the seepage pipe 160 is arranged horizontally and the outlet is provided on the slope 300 for conveying rainwater to the surface of the cover layer 210. The crushed stone subbase 150 is located in the middle of the slope 300 so that the height of the crushed stone subbase 150 in the soil layer is greater than the height of the cover layer 210 in the soil layer.
[0030] The permeable brick surface layer 110 is paved with permeable bricks, the thickness of the permeable brick surface layer 110 is 60mm, the permeability coefficient is above 0.1mm / s, the compressive strength of a single permeable brick is above 35.0MPa, the compressive strength of the permeable brick surface layer 110 is above 40.0MPa, and there is a gap between two adjacent permeable bricks, which is filled with coarse sand. The thickness of the coarse sand leveling layer 120 is 30mm, and the permeability of the coarse sand leveling layer 120 is higher than that of the permeable brick surface layer 110. The first permeable geotextile layer 130 is made of filament spunbond needle-punched non-woven geotextile, and the unit area mass of the first permeable geotextile layer 130 is 200g / m 2, the nominal breaking strength is above 4.5kN / m. The thickness of the permeable cement concrete base 140 is 1500mm, its water permeability coefficient is above 0.5mm / s, the continuous porosity is above 10%, the wear resistance is below 30mm, the compressive strength (28d) is above 30MPa, and the flexural tensile strength (28d) is above 3.5MPa. The thickness of the crushed stone subbase 150 is 2000mm, the crushing value of the crushed stone in the crushed stone subbase 150 is below 26%, the continuous porosity is above 10%, and the compaction degree is ≥95%. The diameter of the infiltration pipe 160 is 100mm, the opening rate is 2%, and the outside of the infiltration pipe 160 is wrapped with a permeable geotextile. The covering layer 210 uses zeolite with a diameter of less than 50mm. The planting soil layer 220 is used for planting plants, which is determined according to the plants planted. The sand layer 230 uses sand particles with a diameter of 3.5-5mm. The second permeable geotextile layer 240 is made of filament spunbonded needle-punched nonwoven geotextile with a unit area mass of 200g / m2. The gravel layer 250 is gravel with a diameter of less than 50mm. The drainage pipe 260 is connected to the municipal pipeline network or the storage tank. The outside of the drainage pipe 260 is wrapped with a permeable geotextile. The diameter of the drainage pipe 260 is 100mm and the opening rate is 2%.
[0031] The sponge city structure of the permeable sidewalk pavement combined with the rain garden provided in the embodiment of the present application is provided with a rain garden structure 200 on one side of the permeable sidewalk structure 100, and rainwater falling on the surface of the permeable sidewalk structure 100 is infiltrated through the permeable brick surface layer 110, the coarse sand leveling layer 120, the first permeable geotextile layer 130, and the permeable cement concrete base layer 140 to the graded crushed stone subbase layer 150 and then enters the infiltration pipe 160 pre-buried in the crushed stone subbase layer 150, thereby utilizing The infiltration pipe 160 collects rainwater falling on the surface of the permeable sidewalk structure 100 and transports it to the middle of the slope 300 on one side of the rain garden structure 200 for discharge, so that the rainwater flows down the slope 300 to the surface of the rain garden structure 200 at the bottom. The rainwater collected on the surface of the rain garden structure 200 infiltrates to the gravel layer 250 through the covering layer 210, the planting soil layer 220, the sand layer 230, and the second permeable geotextile layer 240 in turn, and enters the municipal pipe network or storage tank through the drainage pipe 260.
[0032] At the same time, an overflow type rainwater inlet 270 is provided on the surface of the rain garden structure 200, and the bottom thereof extends to the gravel layer 250. When the rain garden structure 200 reaches the maximum water storage capacity, the rainwater will be discharged into the municipal rainwater drainage system through the overflow type rainwater inlet 270 to ensure the safety of urban drainage and flood prevention. A guard 280 is provided on the top of the overflow type rainwater inlet 270, and the horizontal position height of the overflow type rainwater inlet 270 is lower than the horizontal height of the outlet of the infiltration pipe 160, so as to prevent the rainwater collected in the rain garden structure 200 from flowing back into the permeable sidewalk structure 100 through the infiltration pipe 160. In addition, the outside of the infiltration pipe 160 and the drainage pipe 260 are respectively wrapped with permeable geotextiles, which can prevent the blockage of the pipeline from affecting the rainwater transportation; an impermeable membrane 170 is provided at the bottom of the gravel subbase 150, which can use the impermeable membrane 170 to prevent the rainwater from infiltrating, so as to ensure that the rainwater collected by the permeable sidewalk structure 100 flows back into the rain garden structure 200 through the infiltration pipe 160.
[0033] The permeable sidewalk pavement combined with the rain garden sponge city structure provided in the embodiment of the present application connects the permeable sidewalk structure 100 and the rain garden structure 200 arranged on one side of the permeable sidewalk structure 100 into a whole, so that the permeable sidewalk structure 100 collects rainwater and introduces it into the rain garden structure 200 through the infiltration pipe 160, which can effectively improve the water collection capacity of the rain garden structure 200, maximize the utilization efficiency of the urban sponge facilities, and further purify the water quality of surface runoff.
[0034] Example 2
[0035] like Figure 2 As shown, the embodiment of the present application provides a sponge city structure of a permeable sidewalk pavement combined with a rain garden, which is roughly the same as the structure of the sponge city structure of a permeable sidewalk pavement combined with a rain garden provided in Example 1, with the difference that, in the present embodiment, a liftable mud accumulation plate 271 is provided at the bottom of the overflow rainwater outlet 270, a lifting ear 272 is provided at the top of the mud accumulation plate 271, a slide groove 273 extending along its height direction is provided on the inner wall of the overflow rainwater outlet 270, the mud accumulation plate 271 is provided with a limiting slider 274 slidingly arranged in the slide groove 273, a hook 275 is provided on the inner wall of the top of the overflow rainwater outlet 270, the lifting ear 272 is connected to one end of a lifting chain 276, and the other end of the lifting chain 276 is detachably connected to the hook 275.
[0036] The embodiment of the present application provides a permeable sidewalk pavement combined with a rainwater garden sponge city structure, in which a liftable mud accumulation plate 271 is provided at the bottom of the overflow rainwater outlet 270. After long-term use, mud, plants and domestic garbage discarded by pedestrians enter the overflow rainwater outlet 270 and accumulate on the mud accumulation plate 271. The operator can open the enclosure 280 at the top of the overflow rainwater outlet 270, remove the top of the lifting chain 276 from the hook 275 provided on the inner wall of the top of the overflow rainwater outlet 270, and use a winch to reel in the lifting chain 276 to lift the mud accumulation plate 271 along the overflow rainwater outlet 270 for cleaning. After that, it is lowered again, so as to facilitate the operators to clean up the silt and garbage, and avoid the silt and garbage clogging the overflow type rainwater outlet 270 after long-term use and affecting the rainwater discharge; wherein, the inner wall of the overflow type rainwater outlet 270 is provided with a slide groove 273 extending along its height direction, and the mud accumulation plate 271 is provided with a limit slider 274 sliding in the slide groove 273. When the mud accumulation plate 271 is raised and lowered along the overflow type rainwater outlet 270 by using the lifting chain 276, the slide groove 273 provided on the inner wall of the overflow type rainwater outlet 270 is used to limit the position of the limit slider 274, thereby ensuring that the mud accumulation plate 271 is stably raised and lowered along the overflow type rainwater outlet 270.
[0037] In other optional embodiments, the drain pipe 260 can also be connected to the overflow stormwater outlet 270 through a water pipe, thereby connecting the drain pipe 260 and the overflow stormwater outlet 270, so that the permeable sidewalk structure 100 collects rainwater and introduces it into the rain garden structure 200 through the infiltration pipe 160, and then passes it into the municipal pipeline network through the drain pipe 260 and the overflow stormwater outlet 270 respectively.
[0038] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.
Claims
1. A sponge city structure combining permeable pavement of sidewalks with rain gardens, characterized in that: It includes a permeable sidewalk structure and a rain garden structure arranged on one side of the permeable sidewalk structure. The permeable sidewalk structure includes a permeable brick surface layer, a coarse sand leveling layer, a first permeable geotextile layer, a permeable cement concrete base layer and a crushed stone base layer arranged in sequence from top to bottom, and at least one infiltration pipe is buried in the crushed stone base layer; the rain garden structure includes a covering layer, a planting soil layer, a sand layer, a second permeable geotextile layer and a gravel layer arranged in sequence from top to bottom, and at least one drainage pipe is buried in the gravel layer, and a plurality of permeable holes arranged at intervals are opened on the drainage pipe; the rain garden structure is also provided with at least one overflow rainwater outlet whose bottom extends to the gravel layer; the infiltration pipe is used to transport rainwater to the surface of the covering layer.
2. The sidewalk permeable pavement combined with rain garden sponge city structure according to claim 1 is characterized in that: A slope is provided on one side of the rain garden structure, the covering layer is located at the bottom of the slope, and the outlet of the infiltration pipe is arranged on the slope.
3. The sidewalk permeable pavement combined with rain garden sponge city structure according to claim 1 is characterized in that: An anti-seepage membrane is provided at the bottom of the crushed stone base layer.
4. The sidewalk permeable pavement combined with rain garden sponge city structure according to claim 1 is characterized in that: The top of the overflow type rainwater outlet is provided with an enclosure.
5. The sidewalk permeable pavement combined with rain garden sponge city structure according to claim 1 is characterized in that: A liftable mud collecting plate is provided at the bottom of the overflow type rainwater outlet, and a lifting lug is provided at the top of the mud collecting plate.
6. The sidewalk permeable pavement combined with rain garden sponge city structure according to claim 5 is characterized in that: The inner wall of the overflow type rainwater outlet is provided with a slide groove extending along its height direction, and the mud accumulation plate is provided with a limiting sliding block slidably arranged in the slide groove.
7. The sidewalk permeable pavement combined with rain garden sponge city structure according to claim 5 is characterized in that: A hook is provided on the inner wall at the top of the overflow type rainwater outlet, and the lifting ear is connected to one end of a lifting chain, and the other end of the lifting chain is detachably connected to the hook.
8. The sidewalk permeable pavement combined with rain garden sponge city structure according to claim 1 is characterized in that: The drainage pipe is communicated with the overflow rainwater outlet through a water delivery pipe.
9. The sidewalk permeable pavement combined with rain garden sponge city structure according to claim 1 is characterized in that: The height of the crushed stone base layer in the soil layer is greater than the height of the covering layer in the soil layer.