CN111749071A

CN111749071A - Surface guide type permeable pavement structure

Info

Publication number: CN111749071A
Application number: CN201910233496.XA
Authority: CN
Inventors: 王予红; 陈星宇; 郝庚任
Original assignee: Hong Kong Polytechnic University HKPU
Current assignee: Hong Kong Polytechnic University HKPU
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2020-10-09

Abstract

The invention provides a surface-guided permeable pavement structure, which comprises a pavement surface layer and at least one water collecting pipeline. The surface of the surface layer of mating formation has texture structure, and texture structure includes texture protruding portion and water conservancy diversion texture groove, and water conservancy diversion texture groove is in between the texture protruding portion, the surface layer of mating formation still has at least one hole of permeating water, and every hole of permeating water pierces through the surface layer of mating formation to communicate with one or more water conservancy diversion texture grooves. The water collecting pipeline is positioned below the pavement surface layer and communicated with the water permeable holes. Water on the surface layer of pavement can be guided into the permeable holes through the diversion texture grooves and then is discharged through the water collecting pipeline. The invention can improve the water permeability efficiency of the road surface and enhance the paving strength.

Description

Surface guide type permeable pavement structure

Technical Field

The invention relates to the field of water permeable pavement, in particular to a surface-oriented water permeable pavement structure.

Background

Facilities such as roads, squares, open parking lots, etc. are typically constructed using impervious asphalt or cement concrete materials. With the idea of sponge cities going deep into the heart, water permeable pavement or pavement is widely applied to the construction of the facilities. The permeable pavement is adopted, rainwater can directly permeate into a lower structure of the pavement or soil, and accordingly surface water accumulation and surface runoff caused by delayed rainfall are reduced, surface runoff is filtered, and groundwater is supplemented.

The pavement of the pervious concrete pavement is an important component of the pervious pavement and is widely applied to actual engineering. According to different section forms, the permeable concrete pavement mainly comprises a direct-permeation type, a guide permeation type and a rainwater collection type.

The direct-permeation type permeable concrete pavement mainly comprises a permeable surface layer, a permeable structure layer and a permeable base layer from top to bottom. The permeable surface layer is paved on the surface of a road or other paving structures, and needs to have certain structural strength, can bear load, and resist deformation and surface abrasion. In addition, the surface layer has a decorative effect and a predetermined flatness. The permeable structure layer is a main bearing layer and plays a role in permeating water of the permeable surface layer to the permeable base layer. The permeable base course is paved on the soil base course and mainly formed by rolling and compacting graded broken stones or recycled concrete aggregates, and the permeable base course has the main function of containing water or serving as a drainage channel and can also play a role in blocking soil from entering a permeable structure layer.

The water which permeates the road surface and is paved by the guide permeable concrete is discharged out of the roadbed and then permeates into the underground guide structure. This structure is known as a guided permeable concrete pavement and its main purpose is to reduce the erosion of the roadbed by water. Usually, a permeable concrete surface layer is additionally built on an old common concrete pavement, and water is led out through the surface of the middle layer and then permeates into the ground.

The rainwater collection type pervious concrete pavement is characterized in that the pervious water is collected by a rainwater integration system, and then the water is purified by a technical means and then is recycled.

However, the three types of permeable concrete pavement still have various defects, and mainly comprise the following four aspects:

the strength is low: the pervious concrete has large porosity and cellular surface, so that the compressive strength and the flexural strength of the pervious concrete are relatively low, and the application scene is very limited.

Easy corrosion: the large porosity makes the concrete more accessible to water, air and sunshine, and the car oil leak simultaneously, when meeting with the circumstances such as acid rain, the corruption of pollutant to the concrete can be more serious.

Easy blockage: the holes in the pervious concrete structure are convenient for draining water and are easy to be blocked by pollutants. Along with the aggravation of the blocking degree, the water permeability effect of the pervious concrete is greatly reduced.

Difficult maintenance: at present, no specific and feasible maintenance method exists for paving the pervious concrete, and particularly when the pervious concrete is paved in regions with much wind and sand, pores are easy to be blocked by granular substances, so that the pervious concrete is difficult to maintain.

Disclosure of Invention

The invention discloses a surface-oriented permeable pavement structure, aiming at the defects caused by a porous structure paved by permeable concrete.

The invention provides a surface-oriented permeable pavement structure, which comprises a pavement surface layer and at least one water collecting pipeline. The surface of the surface layer of mating formation has texture structure, and texture structure includes texture protruding portion and water conservancy diversion texture groove, and water conservancy diversion texture groove is in between the texture protruding portion, the surface layer of mating formation still has at least one hole of permeating water, and every hole of permeating water pierces through the surface layer of mating formation to communicate with one or more water conservancy diversion texture grooves. The water collecting pipe is located below the surface layer of pavement and communicated with one of the water permeable holes. Water on the surface layer of pavement can be guided into the permeable holes through the diversion texture grooves and then is discharged through the water collecting pipeline.

According to certain aspects, the depth of the flow directing texture grooves is between 0.5cm and 5 cm.

According to certain aspects, the width of the flow directing texture groove is between 1cm and 10 cm.

According to certain aspects, the ratio of the area of the flow directing texture grooves to the texture is between 20% and 60%.

According to certain aspects, the flow-directing texture grooves have a slope that directs water toward the water-permeable holes.

According to certain aspects, the slope is between 0.5 and 5 degrees.

According to certain aspects, the water permeable holes are between 1cm and 15cm wide.

According to some aspects, the pavement is made of concrete or reinforced concrete.

According to certain aspects, the water collection pipe is located in the base layer below the paved surface.

According to some aspects, the surface-guided water permeable pavement structure further includes a filtering structure located on or in the surface of the water permeable holes to filter impurities in the water flow.

According to certain aspects, the filtering structure is a screen, sand or permeable stone.

According to some aspects, the flow-directing texture grooves have a slope that directs water towards the water-permeable holes, the slope being between 0.5 and 5 degrees, the paving surface is made of concrete or reinforced concrete, and the water collection pipes are located in the base layer below the paving surface.

The surface-oriented permeable pavement structure provided by the invention can improve the permeable efficiency of the road surface and enhance the pavement strength.

Drawings

FIG. 1A is a top view of a surface-guided water permeable pavement structure according to some embodiments of the present disclosure;

FIG. 1B is a front view of the surface-guided water permeable pavement structure of FIG. 1A;

FIG. 2 is a schematic view of an overall pavement structure having a surface-guided water permeable pavement structure according to some embodiments of the present disclosure;

fig. 3A is a top view of a surface-guided water permeable pavement structure according to example 1 of the present invention;

FIG. 3B is a cross-sectional view of the surface-guided water permeable pavement structure of FIG. 3A;

fig. 4A is a top view of a surface-guided water permeable pavement structure according to example 2 of the present invention;

FIG. 4B is a cross-sectional view of the surface-guided water permeable pavement structure of FIG. 4A;

FIG. 5A is a top view of a semi-spherical filter screen according to certain embodiments of the present invention;

FIG. 5B is a cross-sectional view of the filter screen of FIG. 5A; and

fig. 6 is a cross-sectional view of a cylindrical screen according to some embodiments of the invention.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.

Fig. 1A and 1B illustrate surface-guided water permeable pavement structures according to some embodiments of the present invention. The surface-oriented permeable pavement structure 10 comprises a pavement surface layer 11 and a water collecting pipeline 13. The water collection pipe 13 is located below the paved surface 11. The surface of the paved surface 11 has a texture 14. The texture features 14 include texture protrusions 15 and flow directing texture grooves 16, the flow directing texture grooves 16 being located between the texture protrusions 15. The surface course 11 of mating formation still has the hole 12 of permeating water, and the hole 12 of permeating water pierces through the surface course 11 of mating formation and collects the pipeline 13 intercommunication with water conservancy diversion texture groove 16 and water to the water on the surface course 11 of mating formation is by the leading-in hole 12 of permeating water of water conservancy diversion texture groove 16, collects the pipeline 13 discharge through water again, with the ponding that reduces on the surface course 11 of mating formation.

The depth and width of the flow guide texture grooves, the area ratio of the flow guide texture grooves to the total texture structure and the size and number of the water permeable holes can be designed according to the size of the road surface runoff so as to provide a proper water permeable rate.

According to some embodiments, the depth of the flow directing texture grooves is between 0.5cm and 5cm, between 1.5cm and 4cm, or between 2cm and 3 cm.

According to some embodiments, the width of the flow directing texture grooves is between 1cm and 10cm, between 4cm and 7cm, or between 5cm and 6 cm.

According to some embodiments, the ratio of the area of the flow directing texture grooves to the total texture is between 20% and 60%, between 30% and 50%, or between 35% and 45%.

According to some embodiments, the cross-section of the flow-directing texture grooves is U-shaped, V-shaped, rectangular or square.

According to some embodiments, the guide texture grooves have a slope that directs water toward the water permeable holes, the slope may be between 0.5 degrees and 5 degrees, between 1.5 degrees and 4 degrees, or between 2 degrees and 3 degrees.

According to some embodiments, the surface of the textured protrusions is frosted to increase the slip resistance.

According to some embodiments, the paving material of the paving surface is impermeable to water.

According to some embodiments, the paved surface is made of concrete or reinforced concrete, which has higher strength and better durability than the porous (cellular) permeable paving materials of the prior art.

According to some embodiments, the thickness of the paved surface is between 15cm and 35cm, between 20cm and 30cm, or between 23cm and 27 cm.

According to certain embodiments, the water permeable holes have a width of between 1cm and 15cm, between 5cm and 10cm, or between 6cm and 8 cm.

According to some embodiments, the water permeable holes have a cylindrical shape, an cone shape, a rectangular parallelepiped shape, or a square shape.

According to some embodiments, the surface-guided water permeable pavement structure further includes a filtering structure located on or in the surface of the water permeable holes to filter impurities in the water flow.

According to some embodiments, the filtering structure is a screen, sand or permeable stone.

According to some embodiments, the water collection conduit is made of metal or plastic.

According to certain embodiments, the water collection conduit has a width of between 1cm and 15cm, between 5cm and 10cm or between 6cm and 8 cm.

According to some embodiments, the water collection pipe is located in the substrate below the paved surface.

Fig. 2 is a schematic view of an overall pavement structure having a surface-guided water permeable pavement structure according to some embodiments of the present invention. The overall pavement structure 20 includes, from top to bottom, a pavement surface 21, a base 22, an underground water intake channel 23, and a roadbed 24. The base layer 22 may have a green tape 25 thereon. A water collection conduit 26 is located in the substrate 22 and communicates with the water permeable holes in the paved surface 21 and the ground access channels 23. The underground water inlet channel 23 communicates with a reservoir 27. The surface flow is guided into the corresponding permeable holes by the diversion texture grooves of the pavement surface layer 21, and the filter screens on the surfaces of the permeable holes can filter impurities in the surface flow. Subsequently, the surface flow flows via the water permeable holes into the water collecting pipes 26, and finally the water in all the water collecting pipes 26 merges underground in the water inlet channel 23 and flows into the reservoir 27.

The water collection pipe 26 may be a separately formed pipe embedded or inserted in the base layer 22. Or may be a conduit formed by drilling the substrate 22. A water collecting pipe can be arranged for each water permeable hole, or water collecting pipes can be arranged for some water permeable holes.

According to the above embodiment, the surface runoff flows into the permeable holes and the water collecting pipes through the directional texture structure, and then enters the reservoir or the urban sewer pipe. In contrast, prior art permeable pavement structures have penetrated into the underground reservoir through the base and subgrade. The embodiment can effectively reduce the adverse effect of uneven water seepage of the road surface on the strength of the roadbed.

According to some embodiments, the pavement surface is made of concrete or reinforced concrete, which ensures the strength of the permeable pavement and can be designed according to the strength required by the actual pavement or pavement. In contrast, prior art cellular permeable pavements have failed to use steel reinforcement to increase strength because infiltration of rain water causes corrosion of the steel reinforcement and a reduction in strength. Therefore, compared with the honeycomb-shaped water permeable pavement in the prior art, the water permeable pavement structure of the embodiment has high bearing capacity and is more widely applicable to scenes.

Fig. 3A and 3B show a surface-guided water permeable pavement structure according to embodiment 1 of the present invention. The surface-guided permeable pavement structure 30 includes a pavement surface layer 31, a filter structure 33, and a water collection pipe 34. The surface of the pavement skin 31 has a texture 35, and the texture 35 includes texture protrusions 36 (black portions) and flow guide texture grooves 37, and the flow guide texture grooves 37 are located between the texture protrusions 36. The paving surface 31 further has water permeable holes 32, and the water permeable holes 32 are communicated with the water collecting pipe 34 and the flow guiding texture grooves 36. As shown in fig. 3A, the texture 35 is square and is composed of 8 guide texture grooves 37 and 4 water permeable holes 32, and the 4 water permeable holes 32 are located near the corners of the square and communicate with the 4 guide texture grooves 37. The other 4 guide texture grooves 37 are arranged in parallel in the square and are communicated with the 2 guide texture grooves 37. The arrows in the figure indicate the direction of water flow. As shown in fig. 3B, the water permeable holes 32 penetrate the paved surface 31 and communicate with the flow guide texture grooves 37 and the water collecting channel 34. The guide texture groove 37 has a slope 38, and the lowermost end of the guide texture groove 35 having the slope 38 communicates with the water permeable holes 32, which facilitates the directional flow of the water stream. A filter structure 33 is located inside the water permeable holes 32.

Fig. 4A and 4B show a surface-guided water permeable pavement structure according to embodiment 2 of the present invention. The surface-guided permeable pavement structure 40 includes a pavement surface layer 41, a filter structure 43, and a water collection pipe 44. The surface of the paving surface 41 has a texture 45, the texture 45 comprising texture protrusions 46 (black portions) and flow directing texture grooves 47, the flow directing texture grooves 47 being located between the texture protrusions 46. The paving surface 41 also has water permeable holes 42, and the water permeable holes 42 are communicated with a water collecting pipe 44 and a flow guiding texture groove 46. As shown in fig. 4A, the texture 45 is square and consists of 16 guide texture grooves 47 and 5 water permeable holes 42, 4 water permeable holes 42 are located near the corners of the square and communicate with the 4 guide texture grooves 45, and the other 1 water permeable hole 42 is located at the center of the square. The other 4 guide texture grooves 47 are diagonally communicated with the water permeable holes 42 at the center and the water permeable holes 42 at 4 corners. The 8 flow guide texture grooves 47 are communicated with the diagonal flow guide texture grooves 47 in the square shape to form two squares. The arrows in the figure indicate the direction of water flow. As shown in fig. 4B, the water permeable holes 42 penetrate the paved surface 41 and communicate with the diversion texture grooves 47 and the water collection pipe 44. The guide texture groove 47 has a slope 48, and the lowermost end of the guide texture groove 45 having the slope 48 communicates with the water permeable holes 42, which facilitates the directional flow of the water stream. The filter structure 43 is located inside the water permeable holes 42. Example 2 had more flow directing texture grooves and water permeable holes, which increased the water permeability rate, relative to example 1.

According to some embodiments, the filter structure is a water permeable material such as sand, water permeable stone, or the like.

According to some embodiments, the filter structure is a screen. The filter screen can effectively filter the impurity in the way table runoff thereby guarantee the seepage flow speed of rainwater. Meanwhile, the filter screen is designed to be movable, so that subsequent permeable holes can be conveniently cleaned and the filter screen can be conveniently replaced, and the permeable paving is guaranteed to have good permeable efficiency under a long-term use environment. Preferably, the filter screen is made of stainless steel or plastic in its entirety, and the edges of the filter screen are sized so that the filter screen can be stuck on the surface of the water permeable holes without movement. The tensile strength of the filter screen can ensure that the filter screen can be kept in good condition under the action of rainwater scouring and the gravity of sludge, and the sludge can not enter a lower-layer water collecting pipeline. According to some embodiments, the screen is cylindrical, spherical, square or rectangular. Fig. 5A and 5B illustrate a semi-spherical screen 50 according to some embodiments of the present invention. Fig. 6 illustrates a cylindrical screen 60 according to certain embodiments of the present invention.

The surface-oriented permeable pavement structure of some embodiments of the invention mainly has the following advantages:

the water permeation efficiency is high: the directional flow and the gathering of rainwater can be realized to the texture design of surface direction type, can design the surface texture structure of the top layer of mating formation according to the surface runoff size individuality in different areas simultaneously to the efficiency of permeating water of mating formation that permeates water has been improved greatly. Meanwhile, the design of the detachable filter screen at the water permeable hole can effectively filter pollutants of the road surface runoff, and the water permeable efficiency of the pavement structure in a long-term use environment can be guaranteed through cleaning of the timed filter screen.

High strength and wider application range: the pavement surface layer of the embodiment of the invention can be made of dense plain concrete or reinforced concrete, the compression resistance and the bending resistance can be greatly improved, the strength of the pavement surface layer material can be correspondingly designed according to the load of an actual pavement or pavement, and the application scene of permeable pavement is expanded.

The durability is good: compared with the water permeable pavement structure with the honeycomb design in the prior art, the water permeable pavement structure disclosed by the embodiment of the invention reduces the corrosion of moisture, air, sunlight or chemical components, thereby improving the durability of the whole structure.

The adverse effect of uneven water seepage of the road surface on the roadbed is greatly reduced: the water permeable holes of the embodiment of the invention are directly communicated with the lower water collecting pipeline, and the road surface runoff can finally be gathered in the reservoir (or discharged into a drainage system) through the water permeable holes, the water collecting pipes and the underground water inlet channel. Rainwater does not have the chance to enter into the road bed in whole process to the harmful effects of the inhomogeneous infiltration of road surface to road bed intensity have been reduced.

Easy to clean and maintain: for permeable pavement in the prior art, a high-pressure water gun is required to be used for cleaning pores regularly to ensure the smoothness of permeable pores, but the pavement structure disclosed by the embodiment of the invention can recover the originally designed permeable rate by only cleaning sludge at the filter screen.

Reduce city sewage system and handle the burden, improve the efficiency that the rainwater was retrieved and is recycled: the rainwater through the permeable hole can be filtered by the filter screen to remove sundries in the rainwater, the filtered rainwater greatly reduces the risk of blocking a water collecting pipeline, reduces the treatment burden of a city sewage system and also improves the efficiency of rainwater recycling.

The surface-oriented permeable pavement structure provided by the embodiment of the invention can be applied to, but not limited to, permeable pavements of expressways, permeable pavements of roads, permeable pavements of open parking lots, permeable pavements and the like.

Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these embodiments are merely illustrative and that changes and modifications may be made thereto without departing from the principles and spirit of the invention, the scope of which is therefore defined by the appended claims.

Claims

1. The utility model provides a surface direction type structure of mating formation that permeates water, its characterized in that, the surface direction type structure of mating formation that permeates water includes:

the paving surface layer is provided with a texture structure on the surface, the texture structure comprises texture protrusions and flow guide texture grooves, the flow guide texture grooves are arranged between the texture protrusions, the paving surface layer is also provided with at least one water permeable hole, and each water permeable hole penetrates through the paving surface layer and is communicated with one or more flow guide texture grooves; and

at least one water collection conduit located below said paved surface and in communication with one of said water permeable holes;

the water on the surface layer of the pavement can be guided into the permeable holes by the diversion texture grooves and then is discharged through the water collecting pipeline.

2. The surface-guided water permeable pavement structure according to claim 1, wherein the depth of the flow-guiding texture grooves is between 0.5cm and 5 cm.

3. The surface-guided water permeable pavement structure according to claim 1, wherein the width of the flow-guiding texture groove is between 1cm and 10 cm.

4. The surface-guided water permeable pavement structure according to claim 1, wherein the flow-guiding texture grooves occupy an area ratio of the texture structure of between 20% and 60%.

5. The surface-guided water permeable pavement structure according to claim 1, wherein the flow-guiding texture grooves have slopes to guide water to the water permeable holes.

6. The surface-guided water permeable pavement structure according to claim 5, wherein the slope is between 0.5 degrees and 5 degrees.

7. The surface-guided water permeable pavement structure according to claim 1, wherein the width of the water permeable holes is between 1cm and 15 cm.

8. The surface-guided water-permeable pavement structure according to claim 1, wherein the pavement surface layer is made of concrete or reinforced concrete.

9. The surface-guided permeable pavement structure according to claim 1, wherein the water collection pipes are located in the base layer under the pavement surface layer.

10. The surface-guided water-permeable pavement structure according to claim 1, further comprising a filtering structure located on or in the surface of the water-permeable holes to filter impurities in the water flow.

11. The surface-guided permeable pavement structure according to claim 10, wherein the filtering structure is a screen, sand or permeable stone.

12. The surface-guided water permeable pavement structure according to claim 11, wherein the flow-guiding texture grooves have a slope guiding water to the water permeable holes, the slope is between 0.5 degrees and 5 degrees, the pavement surface is made of concrete or reinforced concrete, and the water collecting pipes are located in the base layer below the pavement surface.