CN209759918U - Road surface structure suitable for sponge city - Google Patents
Road surface structure suitable for sponge city Download PDFInfo
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- CN209759918U CN209759918U CN201920181975.7U CN201920181975U CN209759918U CN 209759918 U CN209759918 U CN 209759918U CN 201920181975 U CN201920181975 U CN 201920181975U CN 209759918 U CN209759918 U CN 209759918U
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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
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- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
A road surface structure suitable for sponge city relates to the technical field of road construction, comprising a roadway, a curb and a biological detention ditch; the roadway comprises a surface layer, a stress absorption layer, a base layer and a bottom base layer from top to bottom; the surface layer is water-permeable asphalt concrete, and the asphalt in the asphalt concrete is high-viscosity modified asphalt; the stress absorption surface is provided with a groove along the direction of a cross slope of the road so as to be convenient for water collection and drainage; the bottom of the kerbstone is provided with an opening, the buried drainage pipe is connected to the biological detention ditch, and rainwater permeated by the surface layer is introduced into the biological detention ditch; the biological detention ditch comprises plants, planting soil, a sand filter layer and gravel soil. The utility model discloses the road surface structure has that high temperature stability is high, and low temperature anti-cracking performance is strong, and the water stability is excellent, extension road life, and later maintenance is with low costs is showing the advantage.
Description
Technical Field
The utility model relates to a road building technical field especially relates to a road surface structure suitable for sponge city
Background
Sponge cities are also known as hydro-elastic cities because their general idea is to make rain water have good elasticity to better adapt to changes in the environment. The name to the sponge city internationally is that "the low influence development rainwater system is built", can absorb, permeate, purify the rainwater when raining to discharge and utilize the water of storage when needing, the water economy resource.
at present, the urban road mainly comprises a roadbed, a road surface base layer and a surface layer from bottom to top. Rainwater falls on a road and can form accumulated water to endanger traffic safety, and the service life of the road is also influenced, so that the road is required to be drained, at present, the common surface layer is mainly adopted for directly draining water, the surface layer is impermeable or basically impermeable, a cross slope is arranged on the road surface, and the water is directly drained from the road surface or directly drained into drainage ditches at two sides, so that the road construction and operation cost is improved, the pressure of urban water drainage is increased, in addition, the environmental protection requirement of supplementing underground water is not met, the precious rainwater resource flows through the hardened road structure and drainage pipelines to be brought out of a city, the waste of water resources is caused to a great extent, and the method also conforms to the recently advocated sponge city concept.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome not enough among the above-mentioned prior art, provide a road surface structure suitable for sponge city. The pavement structure has the advantages of high-temperature stability, strong low-temperature crack resistance, excellent water stability, prolonged service life of roads and low later maintenance cost; the large void ratio of the surface layer enables accumulated water to quickly seep downwards, eliminates a water film formed by the traditional compact pavement structure in rainy days due to unsmooth drainage, and reduces the incidence rate of road safety driving accidents in rainy days; rainwater with small treatment difficulty in the biological detention ditch is introduced to supplement underground water through natural digestion and purification of soil, and the heat island effect of the city is relieved to a great extent.
In order to achieve the above object, the utility model adopts the following technical scheme:
A road surface structure suitable for sponge city comprises a roadway, a curb and a biological detention ditch; the roadway sequentially comprises a surface layer, a stress absorption layer, a base layer and a subbase from top to bottom; the surface layer adopts water-permeable asphalt concrete; the surface of the stress absorption layer is provided with a groove along the cross slope direction of the road so as to facilitate water collection and drainage, the stress absorption layer adopts rubber asphalt stabilized macadam, the base layer adopts a cement stabilized graded macadam layer, and the subbase layer adopts a graded macadam layer; the bottom of the kerbstone is provided with an opening, the buried drainage pipe is connected to the biological detention ditch, and rainwater permeated by the surface layer is introduced into the biological detention ditch; the biological detention ditch sequentially comprises plants, planting soil, a sand filter layer and gravel soil from top to bottom.
The asphalt concrete gradation of the utility model is OGFC-13 asphalt concrete, and the porosity of the asphalt concrete is 15-25%.
The asphalt concrete adopts high-viscosity modified asphalt.
The high viscosity modified asphalt is TPS modified asphalt.
The surface layer is 1 cm-2.5 cm in thickness, the stress absorption layer is 1 cm-3 cm in thickness, the base layer is 150 mm-200 mm in thickness, and the subbase layer is 200 mm-500 mm in thickness.
The grooves on the surface of the stress absorbing layer of the utility model are arranged at intervals of 20-50m and depth of 0.2-0.4 cm.
the cement stabilization graded gravel layer of the utility model is novel, the drain pipe is arranged at an interval of 20-50 m.
the radius of the opening at the bottom of the kerbstone is 1cm-5 cm.
Compared with the prior art, the utility model has the following advantage:
1. The surface layer asphalt concrete is OGFC-13TPS modified asphalt concrete, can effectively improve the high-temperature stability, low-temperature crack resistance, water stability and low-temperature cohesiveness of the mixture, greatly prolongs the service life of the pavement, and reduces the later maintenance cost.
2. The void ratio of surface concrete is great for rainy day road surface ponding oozes down fast, eliminates the water film that traditional closely knit road surface structure of rainy day formed because of the drainage is not smooth, has reduced the incidence of rainy day road traffic accident safety.
3. Stress absorption layer surface sets up the recess along the cross slope direction, and the rainwater that the surface course was oozed down flows into biological retaining ditch along the drain pipe that road surface cross slope set up through the interval in the curb through the recess, and the rainwater is cleared up through the nature of soil and is purified and supply groundwater, alleviates urban "heat island effect" in the very big degree.
To sum up, the utility model relates to a road surface structure suitable for sponge city, high temperature stability is high, and low temperature crack resistance, water stability are strong, and low temperature cohesiveness is excellent, long service life, and later maintenance is with low costs, can eliminate rainy day road surface water film simultaneously, and reinforcing road traffic safety improves rainwater availability factor, is particularly suitable for construction sponge city area and uses widely.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic view of a road surface structure suitable for sponge cities;
FIG. 2 is a schematic structural view of a middle stress absorbing layer according to the present invention;
FIG. 3 is a schematic structural view of a curb according to the present invention;
fig. 4 is a schematic structural diagram of a preferred embodiment of the present invention;
Fig. 5 is a schematic structural diagram of comparative example 1 of the present invention;
Fig. 6 is a schematic structural diagram of comparative example 2 of the present invention;
1-a roadway; 2-kerbstones; 3-biological retention groove; 4-drainage pipe, 7-inlet for stom water 8-roadbed
9-sidewalk bricks 10-rainwater pipelines 101-surface layers; a is OGFC-13 graded TPS modified asphalt concrete B-rubber asphalt stress absorbing layer C-cement stabilized graded crushed stone layer D-graded crushed stone base layer E is AC-13 matrix asphalt concrete F is AC-13SBS modified asphalt concrete 102-stress absorbing layer; 102A-groove 103-base layer; 104-an underlayer; 301-a plant; 302-planting soil; 303-sand filtering layer; 304-gravel soil.
Detailed Description
As shown in fig. 1, a pavement structure suitable for sponge city comprises a roadway 1, a curb 2 and a biological retention ditch 3; the roadway sequentially comprises a surface layer 101, a stress absorption layer 102, a base layer 103 and a bottom layer 104 from top to bottom; the surface layer 101 is made of water-permeable asphalt concrete; grooves 102A are formed in the surface of the stress absorption layer 102 along the cross slope direction of the road, water collection and drainage are facilitated, rubber asphalt is adopted for stabilizing macadam on the stress absorption layer 102, a cement stabilizing graded gravel layer is adopted for the base layer, and a graded gravel layer is adopted for the subbase layer; the bottom of the kerbstone 2 is provided with an opening 201, the buried drainage pipe 4 is connected to the biological detention ditch 3, and rainwater permeated by the surface layer 101 is introduced into the biological detention ditch 3; the biological retention ditch 3 sequentially comprises plants 301, planting soil 302, a sand filter layer 303 and gravel soil 304 from top to bottom.
the asphalt concrete gradation of the utility model is OGFC-13 asphalt concrete, and the porosity of the asphalt concrete is 15-25%.
The asphalt concrete adopts high-viscosity modified asphalt.
The high viscosity modified asphalt is TPS modified asphalt.
The thickness of the surface layer 101 is 1 cm-2.5 cm, the thickness of the stress absorption layer is 1 cm-3 cm, the thickness of the base layer is 150 mm-200 mm, and the thickness of the subbase layer is 200 mm-500 mm.
The grooves 1021 on the surface of the stress absorption layer 102 of the utility model are arranged at intervals of 20-50m and depth of 0.2-0.4 cm.
The drain pipe 4 of the utility model is provided with an interval of 20-50 m.
The radius of the opening 201 at the bottom of the kerbstone 2 is 1cm-5 cm.
A high performance bituminous concrete structure, its construction process flow as follows:
Firstly, the method comprises the following steps: cleaning the roadbed seriously, and conforming to the design elevation and the cross slope under the condition of ensuring compaction;
Secondly, the method comprises the following steps: paving a subbase layer and a base layer on the finished roadbed, and ensuring control indexes such as compactness, top surface elevation, strength and the like;
Thirdly, the method comprises the following steps: after the base layer is qualified, spreading penetrating layer oil, constructing the stress absorption layer 2, and after the stress absorption layer 2 is constructed, spreading the mixture of the surface layer 101;
Fourthly: after the acceptance of the surface layer 101 is passed, the construction of the curb 2 and the biological retention trench 3 is performed.
To better illustrate the beneficial effects and significant advances of the inventive structure, the following preferred examples and comparative examples are given by way of example:
The preferred embodiment:
As shown in fig. 4, the surface layer 101 is OGFC-13TPS modified asphalt concrete; the base layer 103 is a cement-stabilized graded broken stone base layer, and the subbase layer 104 is graded broken stone; a rubberized asphalt stress absorbing layer 102 is disposed between the face layer 101 and the base layer 103.
The radius of the opening at the bottom of the kerbstone 2 is 3 cm; the surface grooves of the stress absorption layer 102 are arranged at intervals of 25m and have a depth of 0.3 cm; the drain pipe 4 is arranged in an opening at the bottom of the curb 2 and connected to planting soil 302 in the bioretention trench 3.
In rainy days, rainwater seeped downwards from the surface layer 101 flows into the biological detention ditch 3 along the cross slope of the road surface through the grooves and the drain pipes 4 arranged at intervals in the kerbstone 2
Comparative example 1:
As shown in FIG. 5, the facing layer is AC-13 matrix asphalt concrete; the base layer is a cement stable graded broken stone base layer, and the subbase layer is graded broken stone; and a rubber asphalt stress absorbing layer is arranged between the lower layer and the base layer.
Rainwater enters the rainwater inlet along the cross slope direction of the road on the surface layer and finally converges into a rainwater pipeline to be connected into a municipal drainage system.
comparative example 2:
As shown in FIG. 6, the surface layer is AC-13SBS modified asphalt concrete; the base layer is a cement stable graded broken stone base layer, and the subbase layer is graded broken stone; and a rubber asphalt stress absorbing layer is arranged between the lower layer and the base layer.
Rainwater enters the rainwater inlet along the cross slope direction of the road on the surface layer and finally converges into a rainwater pipeline to be connected into a municipal drainage system.
The comparison of the performance of the preferred embodiment with that of the comparative example is detailed in Table 1:
TABLE 1 comparison of road properties of preferred examples and comparative examples
As can be seen from the data in the table 1, the indexes of the OGFC-13TPS modified asphalt concrete are all superior to those of the AC-13 matrix asphalt concrete; compared with SBS modified asphalt concrete, the modified asphalt concrete has higher void ratio, and is slightly inferior to AC-13SBS modified asphalt concrete in water stability and low temperature crack resistance, and may be used in surface layer to raise the water permeability of road surface greatly.
compared with the common asphalt pavement structure, the utility model has the advantages that the void ratio of the surface concrete is larger, so that the accumulated water on the pavement can quickly seep down in rainy days, the water film formed by the traditional compact pavement structure in rainy days due to unsmooth drainage is eliminated, and the incidence rate of safe driving accidents on the road in rainy days is reduced; simultaneously, rainwater seeped downwards from the surface layer flows into the biological detention ditch through the grooves along the cross slope of the road surface through the drain pipes arranged at intervals in the kerbstone, the rainwater is naturally cleared up and purified through soil to supplement underground water, and the heat island effect of the city is greatly relieved.
The above, only be the preferred embodiment of the utility model discloses a it is not right the utility model discloses do any restriction, all according to the utility model discloses any simple modification, change and equivalent structure transform that the technical entity was done to above embodiment all still belong to the utility model discloses technical scheme's within the scope of protection.
Claims (8)
1. The utility model provides a road surface structure suitable for sponge city which characterized in that: comprises a roadway (1), a curb (2) and a biological detention ditch (3); the roadway sequentially comprises a surface layer (101), a stress absorption layer (102), a base layer (103) and a bottom base layer (104) from top to bottom; the surface layer (101) is made of water-permeable asphalt concrete; grooves are formed in the surface of the stress absorption layer (102) along the cross slope direction of the road, so that water collection and drainage are facilitated, rubber asphalt is adopted for stabilizing macadam on the stress absorption layer (102), a cement stabilized graded gravel layer is adopted for the base layer, and a graded gravel layer is adopted for the subbase layer; the bottom of the kerbstone (2) is provided with an opening (201), the buried drainage pipe (4) is connected to the biological detention ditch (3), and rainwater infiltrated by the surface layer (101) is introduced into the biological detention ditch (3); the biological retention ditch (3) sequentially comprises plants (301), planting soil (302), a sand filter layer (303) and gravel soil (304) from top to bottom.
2. A pavement structure suitable for sponge cities as claimed in claim 1, wherein: the asphalt concrete grading is OGFC-13 asphalt concrete, and the porosity of the asphalt concrete is 15% -25%.
3. A pavement structure suitable for use in a sponge city according to claim 1 or 2, characterized in that: the asphalt concrete adopts high-viscosity modified asphalt.
4. A pavement structure suitable for sponge cities as claimed in claim 3, wherein: the high-viscosity modified asphalt is TPS modified asphalt.
5. A pavement structure suitable for sponge cities as claimed in claim 1, wherein: the thickness of the surface layer (101) is 1 cm-2.5 cm, the thickness of the stress absorption layer (102) is 1 cm-3 cm, the thickness of the base layer is 150 mm-200 mm, and the thickness of the underlayer is 200 mm-500 mm.
6. A pavement structure suitable for sponge cities as claimed in claim 1, wherein: the grooves (1021) on the surface of the stress absorption layer (102) are arranged at intervals of 20-50m and at a depth of 0.2-0.4 cm.
7. A pavement structure suitable for sponge cities as claimed in claim 1, wherein: the drain pipe (4) is arranged at intervals of 20-50 m.
8. a pavement structure suitable for sponge cities as claimed in claim 1, wherein: the radius of the opening (201) at the bottom of the kerbstone (2) is 1cm-5 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920181975.7U CN209759918U (en) | 2019-02-01 | 2019-02-01 | Road surface structure suitable for sponge city |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920181975.7U CN209759918U (en) | 2019-02-01 | 2019-02-01 | Road surface structure suitable for sponge city |
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| CN209759918U true CN209759918U (en) | 2019-12-10 |
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| CN201920181975.7U Active CN209759918U (en) | 2019-02-01 | 2019-02-01 | Road surface structure suitable for sponge city |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111945506A (en) * | 2020-08-19 | 2020-11-17 | 长安大学 | Porous concrete base layer composite asphalt pavement structure and laying method thereof |
| CN112726325A (en) * | 2020-12-25 | 2021-04-30 | 中国电建集团贵阳勘测设计研究院有限公司 | Sidewalk drainage structure and combined drainage method of sidewalk drainage structure and drainage curb |
-
2019
- 2019-02-01 CN CN201920181975.7U patent/CN209759918U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111945506A (en) * | 2020-08-19 | 2020-11-17 | 长安大学 | Porous concrete base layer composite asphalt pavement structure and laying method thereof |
| CN112726325A (en) * | 2020-12-25 | 2021-04-30 | 中国电建集团贵阳勘测设计研究院有限公司 | Sidewalk drainage structure and combined drainage method of sidewalk drainage structure and drainage curb |
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