CN207749382U - A drainage pavement structure for sponge city - Google Patents

Abstract

The utility model discloses a drainage pavement structure for sponge cities, which solves the problem that the traditional pavement structure can not discharge rainwater in time, therefore, rainwater is easily accumulated on the road surface to affect the walking of pedestrians and the running of vehicles, the key point of the technical scheme is a drainage pavement structure for sponge cities, which comprises a pavement base layer and a permeable asphalt layer, a drainage layer is laid between the pavement base layer and the permeable asphalt layer, the drainage layer comprises a plurality of drainage blind ditches which are arranged at equal intervals transversely and longitudinally and are communicated with each other and a water guide module arranged in a surrounding area of the drainage blind ditches, the water guide module is by lower supreme including rubble layer, water barrier and permeable bed, the tip and the rainwater well or the cistern of drainage french drain are linked together, can strengthen the drainage performance on road surface, avoid because the rainwater is amassed and is caused the influence in the road surface to pedestrian or vehicle.

Description

A drainage pavement structure for sponge city

technical field

The utility model relates to a pavement structure, in particular to a drainage pavement structure for a sponge city.

Background technique

Rainwater is a valuable and economical water resource for cities. Leading rainwater from closed roads or roofs to non-closed roads through soil infiltration and filtration can not only slow down the intensity of rainwater surface runoff, replenish groundwater, but also remove some pollutants in rainwater. The filtered rainwater can also be used as Non-drinking water in cities, saving water resources and alleviating the pressure on urban water supply.

The traditional pavement structure usually includes the pavement base and the asphalt layer laid on the pavement base. However, during the rainy season in southern cities, due to the large amount of rainfall, the pavement structure cannot discharge the rainwater in time, so the rainwater is easy to accumulate on the pavement. The walking of pedestrians or the driving of vehicles will be affected.

Utility model content

The purpose of the utility model is to provide a drainage pavement structure for a sponge city, which can enhance the drainage performance of the pavement and avoid the impact on pedestrians or vehicles due to the accumulation of rainwater on the pavement.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

A drainage pavement structure for a sponge city, comprising a pavement base and a permeable asphalt layer. A drainage layer is laid between the pavement base and the permeable asphalt layer. Ditch and a water guide module arranged in the enclosed area of the drainage blind ditch, the water guide module includes a gravel layer, a water-resisting layer and a water-permeable layer from bottom to top, and the end of the drainage blind ditch is connected to the rainwater well or connected to a reservoir.

By adopting the above technical scheme and laying a drainage layer between the pavement base and the permeable asphalt layer, the horizontal and vertical arrangement of the drainage blind ditch is connected to each other and the ends are connected with rainwater wells or reservoirs. At the same time, through the design of the water guide module, the rainwater Penetrate downward through the permeable asphalt layer. After the rainwater passes through the permeable layer, it is blocked by the water-resisting layer and flows along the surface of the aquifer to the blind drainage ditch, and is discharged from the blind drainage ditch to the rainwater well or water storage pool.

Preferably, a concrete cushion is arranged between the water-resisting layer and the gravel layer.

By adopting the above-mentioned technical scheme, through the design of the concrete cushion, the surface of the concrete cushion is relatively smooth, and the water-repellent layer can be laid on the concrete cushion relatively stably, and the rainwater infiltrated from the permeable layer runs along the upper surface of the water-resistant layer It can be better merged into the blind drainage ditch and discharged from the blind drainage ditch.

Preferably, the lower surface of the concrete cushion is in contact with the gravel layer, the middle part of the upper surface of the concrete cushion is raised upwards, the periphery of the water-proof layer is in contact with the drainage blind ditch, and the water-proof layer It is laid on the upper surface above the concrete cushion to form a convex diversion surface in the middle.

By adopting the above technical scheme, the middle part of the upper surface of the concrete cushion is convex, and the water-proof layer is laid on the concrete cushion, and the upper surface forms a diversion surface with a convex middle, and the periphery of the water-proof layer is in contact with the drainage blind ditch. Then, the rainwater infiltrated from the permeable layer can better flow into the blind drainage ditch along the diversion surface and be discharged from the blind drainage ditch.

Preferably, the guide surface is a spherical arc surface convex in the middle.

By adopting the above technical solution and designing the diversion as a spherical arc surface, the rainwater infiltrated from the permeable layer can flow relatively evenly along the diversion surface into the drainage blind ditch around the periphery.

Preferably, the permeable asphalt layer includes a porous asphalt layer laid above and a permeable concrete surface layer located below the porous asphalt layer.

By adopting the above technical scheme, by setting the permeable asphalt layer as a porous asphalt layer and a permeable concrete surface layer, the larger pores of the asphalt in the porous asphalt layer can better permeate downwards, and the permeable concrete surface layer is made of sand-free concrete. The permeable concrete surface layer made of the material has good water permeability and can improve the structural strength of the utility model.

Preferably, a cementation layer is arranged between the permeable concrete surface layer and the porous asphalt layer.

By adopting the above technical solution, the cementation layer is made of silicone epoxy resin as the cementation material, and the cementation layer made of this material has excellent bonding performance and can enhance the integrity of the permeable asphalt layer.

Preferably, a gap filling layer for filling gaps in the pavement base layer is provided between the pavement base layer and the drainage layer.

By adopting the above technical scheme, the pavement base is formed by tamping natural soil, its structure is relatively loose, and gaps are prone to appear on the surface. Through the design of the gap filling layer, the gap filling layer is formed by spraying petroleum asphalt on the pavement base, which is formed by spraying this material The caulking layer penetrates down into the gaps in the pavement base and fills those gaps, thereby enhancing the surface strength and integrity of the pavement base.

Preferably, the thickness of the porous asphalt layer is 20-25mm.

By adopting the above technical scheme, the thickness of the porous asphalt layer is 20-25 mm, which saves construction cost while ensuring good structural strength.

In summary, the utility model has the following beneficial effects:

By designing the drainage blind ditch and the water guide module that diverts rainwater to the drainage blind ditch, the rainwater that falls on the pavement structure can flow into the drainage blind ditch along the water-resisting layer in the water guide module and then flow out from the drainage blind ditch. Into the water storage late or rainwater well.

Description of drawings

Fig. 1 is the schematic diagram of drainage pavement structure;

Fig. 2 is a top view structural schematic diagram of the drainage layer;

Fig. 3 is an enlarged view of point A in Fig. 1 .

In the figure, 1. Pavement base; 11. Filling layer; 2. Drainage layer; 21. Drainage blind ditch; 22. Water diversion module; 221. Gravel layer; , permeable layer; 224, concrete cushion; 2241, arc convex; 3, permeable asphalt layer; 31, permeable concrete surface layer; 32, cementation layer; 33, porous asphalt layer.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Referring to FIG. 1 , a drainage pavement structure for a sponge city includes a pavement base 1 , a gap filling layer 11 , a drainage layer 2 and a permeable asphalt layer 3 laid sequentially from bottom to top.

The pavement base 1 is formed by natural soil tamping. In this embodiment, the interstitial layer 11 is formed by spraying petroleum asphalt on the pavement base 1. The interstitial layer 11 formed by spraying this material can penetrate downwards into the gaps of the pavement base 1 and then These gaps are filled, thereby enhancing the surface strength and integrity of the pavement base 1 .

Referring to Fig. 1, Fig. 2 and Fig. 3, the drainage layer 2 includes blind drainage ditches 21 arranged horizontally and vertically at equal intervals and communicating with each other, and water guide modules 22 arranged in the section enclosed by the blind drainage ditches 21. Wherein, the end of drainage blind ditch 21 is connected with rainwater well or reservoir, and water guide module 22 includes gravel layer 221, water-proof layer 222 and water-permeable layer 223 from bottom to top, and the periphery of water-proof layer 222 and Drainage blind ditch 21 abuts.

The crushed stone layer 221 is composed of crushed stones with a particle size of 5-25 mm, and the crushed stone layer 221 made of this material has better structural strength; a concrete cushion is also arranged between the crushed stone layer 221 and the water-proof layer 222 224, the lower surface of the concrete cushion 2241 is in contact with the crushed stone layer 221, and the middle part of the upper surface protrudes upward in a spherical arc shape. The concrete cushion 224 is made of C10 concrete, and the surface of the concrete cushion 224 made of this material Relatively flat, can facilitate the setting of the water-repellent layer 222; the water-repellent layer 222 is a geomembrane made of polyethylene as the main material, and the water-repellent layer 222 made of this material has good anti-seepage performance, and the upper surface forms a spherical shape With the arc-shaped diversion surface 2221, water can better flow into the drainage blind ditch 21 and discharge along the diversion surface 2221; the water-permeable layer 223 is made of sandstone material, and the water-permeable layer 223 made of this material has a relatively small gap. Large, rainwater can penetrate well through the water-permeable layer 223 downwards to the water-resistant layer 222.

Referring to FIG. 1 , the permeable asphalt layer 3 includes a permeable concrete surface layer 31 , a cementitious layer 32 and a porous asphalt layer 33 laid sequentially from bottom to top. The permeable concrete surface layer 31 is made of sand-free concrete, and the permeable concrete surface layer 31 made of this material has good water permeability and can improve the structural strength of the present utility model; the bonding layer 32 is silicone epoxy resin as the bonding material The cementitious layer 32 made of this material has excellent bonding performance, and can better combine the permeable concrete surface layer 31 and the porous asphalt layer 33 to enhance the integrity of the permeable asphalt layer 3; porous The asphalt layer 33 is made of a large-porous asphalt material with a thickness of 20-25 mm. Rainwater can permeate downward through the porous asphalt layer 33 and enter the drainage blind hole better.

The rainwater falls on the road surface, penetrates downwards through the porous asphalt layer 33, the permeable concrete surface layer 31 and the water-permeable layer 223 in sequence, is blocked by the water-resistant layer 222 and flows into the drainage blind ditch along the diversion surface 2221 of the water-resistant layer 222 21 and is discharged from the blind drainage ditch 21 to a reservoir or a rainwater well.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new claims are protected by patent law.

Claims (8)

1. A drainage pavement structure for a sponge city, comprising a pavement base (1) and a permeable asphalt layer (3), characterized in that a drainage layer is laid between the pavement base (1) and the permeable asphalt layer (3) (2), the drainage layer (2) includes several blind drainage ditches (21) arranged horizontally and vertically at equal intervals and connected to each other, and water guide modules (22) arranged in the enclosed area of the blind drainage ditches (21) , the water guide module (22) includes a gravel layer (221), a water-resistant layer (222) and a water-permeable layer (223) from bottom to top, and the end of the blind drainage ditch (21) is connected to the rainwater well or storage The pools are connected. 2 . The drainage pavement structure for sponge city according to claim 1 , characterized in that, a concrete cushion ( 224 ) is arranged between the water-resistant layer ( 222 ) and the gravel layer ( 221 ). 3. The drainage pavement structure for sponge city according to claim 2, characterized in that, the lower surface of the concrete cushion (224) abuts against the gravel layer (221), and the concrete cushion (224) The middle part of the upper surface of ) protrudes upwards, the periphery of the water-resisting layer (222) is in contact with the drainage blind ditch (21), and the water-resisting layer (222) is laid on the upper surface of the concrete cushion (224) to form Convex diversion surface (2221) in the middle. 4. The drainage pavement structure for sponge city according to claim 3, characterized in that, the diversion surface (2221) is a spherical arc surface with a convex middle. 5. A drainage pavement structure for a sponge city according to claim 1, characterized in that the permeable asphalt layer (3) includes a porous asphalt layer (33) laid on top and a porous asphalt layer (33) Permeable concrete surface (31) below. 6 . The drainage pavement structure for sponge city according to claim 5 , characterized in that a cementation layer ( 32 ) is arranged between the permeable concrete surface layer ( 31 ) and the porous asphalt layer ( 33 ). 7. A drainage pavement structure for a sponge city according to claim 1, characterized in that a filler for filling the gap between the pavement base (1) and the drainage layer (2) is provided between the pavement base (1) and the drainage layer (2). Gap layer (11). 8. The drainage pavement structure for sponge city according to claim 5, characterized in that the thickness of the porous asphalt layer (33) is 20-25m.