CN114908636A - Sponge urban road system - Google Patents
Sponge urban road system Download PDFInfo
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- CN114908636A CN114908636A CN202210576307.0A CN202210576307A CN114908636A CN 114908636 A CN114908636 A CN 114908636A CN 202210576307 A CN202210576307 A CN 202210576307A CN 114908636 A CN114908636 A CN 114908636A
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- underdrain
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- permeable pavement
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
- E01C11/226—Coherent pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Road Paving Structures (AREA)
- Sewage (AREA)
Abstract
The embodiment of the invention discloses a sponge urban road system which comprises a water permeable pavement layer, a plurality of rainwater openings and a drainage blind ditch. The plurality of the rainwater openings are arranged at intervals along the length direction of the water-permeable pavement layer, and the rainwater openings are provided with connecting pipes; the drainage underdrain is arranged below the water-permeable pavement layer, extends along the length direction of the water-permeable pavement layer, and is communicated with at least one of the plurality of rainwater outlets. The sponge urban road system can effectively seep and collect rainwater, and improves the waterlogging prevention risk capability of the traditional rainwater pipe network.
Description
Technical Field
The invention relates to the technical field of roads and drainage, in particular to a sponge urban road system.
Background
For the drainage of urban roads, in the prior art, permeation pipes are arranged at intervals at the bottom in a graded gravel layer, and water permeating into the permeation pipes is led to a rainwater port through the permeation pipes. However, in the actual drainage and water seepage process, rainwater far away from the seepage pipe cannot flow to the seepage pipe well, so that the water permeability of the road is insufficient, and the overall water seepage effect of the road is affected.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a sponge urban road system for effectively collecting and discharging rainwater on a road surface.
The sponge urban road system of the embodiment of the invention comprises:
a permeable pavement layer; and
the rainwater inlets are arranged at intervals along the length direction of the water-permeable pavement layer and are provided with connecting pipes; and
the drainage underdrain is arranged below the water-permeable pavement layer, extends along the length direction of the water-permeable pavement layer, and is communicated with at least one of the plurality of rainwater outlets.
The sponge urban road system provided by the embodiment of the invention has a simple structure, can effectively seep and collect rainwater, can promote the seeped rainwater to be drained to a rainwater port, reduces rainwater runoff, reduces accumulated water on a road surface, delays runoff flow rate, improves waterlogging prevention risk capacity of a traditional rainwater pipe network, and simultaneously reduces potential safety hazards of tire slipping, wrestling and the like caused by wet and slippery ground.
In some embodiments, the upper surface of the water-permeable pavement layer is provided to be inclined in the width direction thereof, the upper surface of the water-permeable pavement layer has a first end and a second end opposite to each other in the width direction thereof, the first end is located below the second end, and the drainage underdrain and each of the gullies are adjacent to the first end in the width direction of the water-permeable pavement layer.
In some embodiments, the water permeable pavement layer comprises:
the concrete permeable pavement comprises an upper permeable concrete layer and a lower permeable concrete layer, wherein the lower permeable concrete layer is positioned below the upper permeable concrete layer, the aggregate particle size of the lower permeable concrete layer is larger than that of the upper permeable concrete layer, and the upper surface of the upper permeable concrete layer forms the upper surface of the permeable pavement layer; and
the graded broken stone layer is located below the lower water-permeable concrete layer, and the drainage blind ditch is located below the graded broken stone layer.
In some embodiments, the sponge urban road system further comprises an impermeable geotextile, the impermeable geotextile being arranged below the permeable pavement layer, and a part of the impermeable geotextile being laid on an inner wall surface or an outer wall surface of the drainage underdrain.
In some embodiments, the cross-sectional profile of the underdrain is a circular arc.
In some embodiments, the drainage underdrain and the plurality of gullies are disposed opposite to each other in a longitudinal direction of the water-permeable pavement layer, each drainage underdrain includes a plurality of underdrain segments, the plurality of underdrain segments and the plurality of gullies are alternately disposed in the longitudinal direction of the water-permeable pavement layer, and each underdrain segment is communicated with at least one of the two corresponding gullies.
In some embodiments, the at least one of the two corresponding gullies has a water inlet through hole, and the underdrain communicates with the water inlet through hole.
In some embodiments, a gravel layer is laid in the drainage blind ditch, and a first water-permeable geotextile is arranged between the drainage blind ditch and the water inlet through hole.
In some embodiments, the drainage underdrain and the plurality of gullies are spaced apart in the width direction of the water-permeable pavement layer, the sponge urban road system further includes a plurality of water conduits, one end of each water conduit is communicated with the drainage underdrain, and the other ends of the plurality of water conduits are communicated with the plurality of gullies in a one-to-one correspondence manner.
In some embodiments, a gravel layer is laid in the drainage underdrains, and a second water-permeable geotextile is arranged between each water guide pipe and the drainage underdrains.
Drawings
FIG. 1 is a schematic top view of a sponge urban road system of an embodiment of the invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a cross-sectional view C-C of FIG. 1;
FIG. 5 is a schematic top view of a sponge urban road system according to a further embodiment of the invention;
fig. 6 is a cross-sectional view D-D of fig. 5.
Reference numerals:
sponge urban road system 100;
the permeable pavement layer 1, a first end 101, a second end 102, an upper permeable concrete layer 11, a second permeable concrete layer 12 and a graded gravel layer 13;
the rainwater inlet 2, the water inlet grate 21, the shaft 22 and the water inlet through hole 23;
a drainage underdrain 3, an underdrain section 31;
the seepage-proof geotextile 4, the second seepage geotextile 5, the first seepage geotextile 6, the water guide pipe 7 and the connecting pipe 10.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 6, a sponge urban road system 100 according to an embodiment of the present invention includes a permeable pavement layer 1, a plurality of gullies 2, and a drainage underdrain 3. The plurality of gullies 2 are arranged at intervals along the length direction of the permeable pavement layer 1, and the gullies 2 are provided with connecting pipes 10. The drainage underdrain 3 is provided below the permeable pavement layer 1, and the drainage underdrain 3 extends in the longitudinal direction of the permeable pavement layer 1, that is, the longitudinal direction of the drainage underdrain 3 coincides with the longitudinal direction of the permeable pavement layer 1. The underdrain 3 communicates with at least one of the plurality of gullies 2.
According to the sponge urban road system provided by the embodiment of the invention, the drainage underdrain 3 extending along the length direction of the permeable pavement layer 1 is arranged below the permeable pavement layer 1, so that rainwater infiltrated into the permeable pavement layer 1 can be effectively collected in the length direction of the permeable pavement layer 1 by utilizing the drainage underdrain 3, the problem that the infiltrated rainwater is difficult to collect and discharge in the length direction of the permeable pavement layer 1 is avoided, water accumulation on the upper surface of the permeable pavement layer 1 is avoided, and potential safety hazards such as tire skidding, falling and the like caused by wet and slippery surface accumulated water can be reduced. And drainage blind drain 3 and inlet for stom water 2 intercommunication can discharge the rainwater of collecting in the drainage blind drain 3 to inlet for stom water 2, avoid drainage blind drain 3 to take place ponding to the quantity of inlet for stom water 2 is a plurality of, can collect the rainwater of infiltration to in the drainage blind drain 3 rapidly, also can subdue rainwater runoff volume, delay the runoff velocity of flow, improves the anti-risk ability of waterlogging of sponge urban road system.
The sponge urban road system provided by the embodiment of the invention can collect rainwater on the water-permeable pavement layer 1, promote the drained rainwater to be drained out of the pavement, reduce the accumulated water on the pavement, improve the flood-proof risk-resisting capability of the road system, and simultaneously reduce potential safety hazards such as tire skidding and wrestling caused by wet and slippery ground.
In order to make the sponge urban road system of the embodiment of the invention easier to understand, the sponge urban road system is described by taking fig. 1 to fig. 4 as an example. In the direction shown in fig. 1, the front-rear direction is the same as the longitudinal direction of the water-permeable pavement layer 1, and the left-right direction is the same as the width direction of the water-permeable pavement layer 1. Sponge urban road system includes permeable pavement layer 1, a plurality of inlet for stom water 2 and drainage underdrain 3. The permeable pavement layer 1 has a permeable function, and rainwater can permeate downwards. The road surface layer 1 that permeates water inclines on its width direction, inclines on its length direction, more does benefit to the collection of rainwater in the infiltration process down. A plurality of inlet for stoms 2 set up along the length direction interval ground of the pavement layer 1 that permeates water, and inlet for stoms 2 is equipped with connecting pipe 10, and connecting pipe 10 is connected to the rainwater inspection shaft in the rainwater pipe network. The connecting pipes 10 are obliquely arranged, the one end (the end communicated with the rainwater port 2) of each connecting pipe 10 is higher than the other end (the end connected with the rainwater inspection well) of each connecting pipe 10, the inclination of each connecting pipe 10 is 1.0%, and the connecting pipe 10 can adopt a DN300 class II reinforced concrete pipe. The drainage underdrain 3 is established in the below of the pavement layer 1 that permeates water, and the drainage underdrain 3 extends along the length direction of the pavement layer 1 that permeates water, and the length direction of drainage underdrain 3 is unanimous with the length direction of the pavement layer 1 that permeates water promptly, and the drainage underdrain 3 can be effectively collect the rainwater that permeates water pavement layer 1 and ooze down in the length direction of the pavement layer 1 that permeates water, avoids having the rainwater that oozes down to be difficult to collect the exhaust problem in the length direction of the pavement layer 1 that permeates water. The underdrain 3 communicates with at least one of the plurality of gullies 2. Rainwater on the upper surface of the water permeable pavement layer 1 seeps downwards, and the drainage blind ditch 3 below the water permeable pavement layer 1 can receive and collect the seeped rainwater and drain the rainwater into the rainwater inlet 2 through the communicated rainwater inlet 2.
Illustratively, as shown in fig. 2 and 6, the gully 2 includes a shaft 22 and a water inlet grate 21, the water inlet grate 21 is disposed at the upper end of the shaft 22, and the surface gathered water can directly flow into the gully 2 through the water inlet grate 21. The rainwater inlet 2 is provided with a connecting pipe 10, and the connecting pipe 10 is obliquely arranged so as to facilitate the flowing of rainwater from the rainwater inlet 2 to the rainwater inspection well. The sponge urban road system according to the embodiment of the invention is connected to a rainwater manhole in a rainwater pipe network through a connecting pipe 10 to discharge rainwater out of the sponge urban road system according to the embodiment of the invention.
In some embodiments, the upper surface of the water-permeable pavement layer 1 is disposed obliquely in the width direction thereof, the upper surface of the water-permeable pavement layer 1 has a first end 101 and a second end 102 opposite in the width direction thereof, the first end 101 is located below the second end 102, and the drainage underdrain 3 and each gully 2 are adjacent to the first end 101 in the width direction of the water-permeable pavement layer 1. The rainwater seeps downwards from the second end part 102 at the high position to the first end part 101 at the low position in the flowing process and can be rapidly collected into the drainage underdrain 3.
In some embodiments, the permeable pavement layer 1 comprises an upper permeable concrete layer 11, a lower permeable concrete layer 12 and a graded gravel layer 13. The lower pervious concrete layer 12 is positioned below the upper pervious concrete layer 11, and the aggregate particle size of the lower pervious concrete layer 12 is larger than that of the upper pervious concrete layer 11. Wherein, the upper surface of the upper pervious concrete layer 11 forms the upper surface of the pervious pavement layer 1. The graded gravel layer 13 is positioned below the lower pervious concrete layer 12, and the drainage underdrain 3 is positioned below the graded gravel layer 13. The permeable pavement layer 1 has the function of water seepage, and rainwater on the upper surface is infiltrated to avoid water accumulation on the pavement.
In some embodiments, referring to fig. 3 and 4, the sponge urban road system according to the embodiment of the invention further includes an impermeable geotextile 4, the impermeable geotextile 4 is disposed under the permeable pavement layer 1, and a part of the impermeable geotextile 4 is laid on the inner wall surface or the outer wall surface of the drainage blind ditch 3. Specifically, as shown in fig. 4, the cross section of the drainage underdrain 3 has a semicircular outline, and the drainage underdrain 3 has a cavity surrounded by a bottom wall and a bottom wall of the semicircular outline, and the cavity is a passage through which rainwater flows. In the example shown in fig. 4, a portion of impermeable geotextile 4 is laid on the outer wall surface of the underdrain 3. And a roadbed is laid below the anti-seepage geotextile 4 and serves as a foundation of the road, and the anti-seepage geotextile 4 is laid to prevent rainwater in the permeable pavement layer 1 and the drainage blind ditch 3 from continuously seeping into the roadbed. When the sponge urban road system is laid, the impermeable geotextile 4 is laid on the existing roadbed, and then the drainage underdrain 3 and the permeable pavement layer 1 are laid in sequence. In other embodiments, a part of the impermeable geotextile 4 is laid on the inner wall surface of the drainage underdrain 3, so as to prevent rainwater from seeping into the roadbed of the lower layer.
In some embodiments, the cross-sectional profile of the underdrain 3 is rounded to facilitate the collection and flow of rain water. It is to be understood that the cross-sectional profile of the underdrain 3 is not limited thereto, and for example, the cross-sectional profile of the underdrain 3 may also be rectangular as long as it facilitates the collection and flow of rainwater.
In addition, a PVC pipe may be used to form the contour of the drain underdrain 3, and in particular, a PVC pipe having a semicircular cross section may be used as the drain underdrain 3. Therefore, the drain underdrain 3 is simple to manufacture and low in manufacturing cost.
In some embodiments, as shown in fig. 1 to 4, the drainage underdrain 3 and the plurality of gullies 2 are oppositely arranged in the length direction (the front-back direction shown in fig. 1) of the water-permeable pavement layer 1, each drainage underdrain 3 includes a plurality of underdrain sections 31, the plurality of underdrain sections 31 and the plurality of gullies 2 are alternately arranged in the length direction of the water-permeable pavement layer 1, and each underdrain section 31 is communicated with at least one of the corresponding two gullies 2. As shown in fig. 1, two gullies 2 corresponding to the hidden trench section 31 are located at front and rear ends of the hidden trench section 31, respectively. The blind drain section 31 is communicated with the gutter inlet 2 to directly drain rainwater collected in the drainage blind drain 3 into the gutter inlet 2 so as to quickly drain rainwater seeped under the water permeable pavement layer 1.
In some embodiments, at least one of the two corresponding gullies 2 has a water inlet hole 23, and the underdrain 3 is connected to the water inlet hole 23. The sponge urban road system of the embodiment of the invention enables the blind ditch section 31 to be directly communicated with the gutter inlet 2 through the water inlet through hole 23, and is more beneficial to draining water from the blind ditch 3 to the gutter inlet 2. Specifically, referring to fig. 3, the inlet 23 is provided in the shaft 22, and the direction of the extension axis of the inlet 23 is the same as the direction of the extension axis of the underdrain 3, and the inclination of the inlet 23 can be the same as the inclination of the underdrain 3.
In some embodiments, referring to fig. 3 and 4, a gravel layer is laid in the underdrain 3, and a first water-permeable geotextile 6 is provided between the underdrain 3 and the water inlet hole 23. The gravel layer is laid to ensure the supporting hardness of the drainage blind ditch 3 to the permeable pavement layer 1 and avoid the sinking of the permeable pavement layer 1. The first water seepage geotextile 6 is convenient for rainwater of the drainage blind ditch 3 to seep downwards and can form separation on a sand gravel layer.
In another embodiment, the underdrain 3 and the plurality of gullies 2 are provided at intervals in the width direction of the water-permeable pavement layer 1. The sponge urban road system further comprises a plurality of water guide pipes 7, one end of each water guide pipe 7 is communicated with the drainage blind ditch 3, and the other ends of the water guide pipes 7 are communicated with the rainwater openings 2 in a one-to-one correspondence mode. Illustratively, referring to fig. 5 and 6, the gully 2 is spaced apart from the water permeable pavement layer 1 in the width direction, and the water conduit 7 communicates the drainage underdrain 3 and the gully 2 to drain rainwater collected in the drainage underdrain 3 into the gully 2, thereby rapidly draining rainwater seeping down from the water permeable pavement layer 1.
To facilitate the flow of rainwater, the one end (end communicating with the drainage underdrain 3) of each water guide pipe 7 is higher than the other end (end communicating with the gutter inlet 2) of the water guide pipe 7. The water conduit 7 may be a PVC pipe. When the water guide pipe 7 is arranged, the pipe top soil covering height of the water guide pipe 7 is implemented according to the existing 'outdoor drainage design standard' GB 50014-2021.
In a further embodiment, as shown in fig. 6, a gravel layer is laid in the underdrain 3, and a second water-permeable geotextile 5 is provided between each water guide pipe 7 and the underdrain 3. The second water seepage geotextile 5 is convenient for the rainwater of the drainage blind ditch 3 to seep downwards and can form separation on a sand gravel layer.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A sponge urban road system, comprising:
a permeable pavement layer (1); and
the rainwater outlets (2) are arranged at intervals along the length direction of the water-permeable pavement layer (1), and the rainwater outlets (2) are provided with connecting pipes (10); and
the drainage blind ditch (3) is arranged below the water-permeable pavement layer (1), the drainage blind ditch (3) extends along the length direction of the water-permeable pavement layer (1), and the drainage blind ditch (3) is communicated with at least one of the rainwater outlets (2).
2. A sponge urban road system according to claim 1, characterized in that the upper surface of the water-permeable pavement layer (1) is arranged obliquely in its width direction, the upper surface of the water-permeable pavement layer (1) has a first end (101) and a second end (102) opposite in its width direction, the first end (101) is located below the second end (102), the drainage underdrain (3) and each gully (2) are adjacent to the first end (101) in the width direction of the water-permeable pavement layer (1).
3. Sponge urban road system according to claim 2, characterized in that the permeable pavement layer (1) comprises:
the permeable pavement structure comprises an upper permeable concrete layer (11) and a lower permeable concrete layer (12), wherein the lower permeable concrete layer (12) is positioned below the upper permeable concrete layer (11), the aggregate particle size of the lower permeable concrete layer (12) is larger than that of the upper permeable concrete layer (11), and the upper surface of the upper permeable concrete layer (11) forms the upper surface of the permeable pavement layer (1); and
the graded gravel layer (13), the graded gravel layer (13) is located the below of lower pervious concrete layer (12), drainage underdrain (3) is located the below of graded gravel layer (13).
4. The sponge urban road system according to claim 1, further comprising an impermeable geotextile (4), wherein the impermeable geotextile (4) is arranged below the permeable pavement layer (1), and a part of the impermeable geotextile (4) is laid on the inner wall surface or the outer wall surface of the drainage underdrain (3).
5. Sponge urban road system according to claim 1, characterized in that the cross-section profile of the underdrain (3) is circular arc.
6. Sponge urban road system according to any one of claims 1 to 5, characterized in that the underdrain (3) and the plurality of gullies (2) are arranged opposite in the length direction of the water permeable pavement layer (1), each underdrain (3) comprising a plurality of underdrain segments (31), a plurality of underdrain segments (31) and a plurality of gullies (2) being arranged alternately in the length direction of the water permeable pavement layer (1), each underdrain segment (31) communicating with at least one of the respective two gullies (2).
7. The sponge urban road system according to claim 6, wherein at least one of the two corresponding gullies (2) is provided with a water inlet through hole (23), and the drainage underdrain (3) is communicated with the water inlet through hole (23).
8. A sponge urban road system according to claim 7, characterized in that a gravel layer is laid in the underdrain (3), and a first water-permeable geotextile (6) is arranged between the underdrain (3) and the water inlet through hole (23).
9. The sponge urban road system according to any one of claims 1 to 4, wherein the drainage underdrain (3) and the plurality of gullies (2) are arranged at intervals in the width direction of the water-permeable pavement layer (1), the sponge urban road system further comprises a plurality of water conduits (7), one end of each water conduit (7) is communicated with the drainage underdrain (3), and the other ends of the plurality of water conduits (7) are communicated with the plurality of gullies (2) in a one-to-one correspondence manner.
10. A sponge urban road system according to claim 9, characterized in that a gravel layer is laid inside the underdrain (3) and a second water-permeable geotextile (5) is provided between each conduit (7) and the underdrain (3).
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| CN202210576307.0A CN114908636A (en) | 2022-05-25 | 2022-05-25 | Sponge urban road system |
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