CN220977577U - Asphalt concrete pavement edge drainage structure - Google Patents
Asphalt concrete pavement edge drainage structure Download PDFInfo
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- CN220977577U CN220977577U CN202322015428.0U CN202322015428U CN220977577U CN 220977577 U CN220977577 U CN 220977577U CN 202322015428 U CN202322015428 U CN 202322015428U CN 220977577 U CN220977577 U CN 220977577U
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- asphalt concrete
- ditch
- drainage structure
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- 239000011384 asphalt concrete Substances 0.000 title claims abstract description 35
- 239000010410 layer Substances 0.000 claims abstract description 78
- 239000004575 stone Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000008595 infiltration Effects 0.000 claims abstract description 24
- 238000001764 infiltration Methods 0.000 claims abstract description 24
- 239000002344 surface layer Substances 0.000 claims abstract description 17
- 239000002689 soil Substances 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 239000004746 geotextile Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims description 14
- 230000035699 permeability Effects 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 6
- 230000009172 bursting Effects 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004567 concrete Substances 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000008233 hard water Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 239000010426 asphalt Substances 0.000 description 5
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
Abstract
The utility model relates to an asphalt concrete pavement edge drainage structure. The asphalt concrete pavement edge drainage structure comprises side ditches arranged on the pavement edge side, broken stone blind ditches which are arranged below the cushion layer and are positioned on the pavement edge side, and broken stone seepage ditches which are arranged in the lower area of the surface layer and close to the pavement edge side; both sides and the bottom side of the gravel blind ditch are wrapped by impermeable geomembranes, the bottom side of the cushion layer is wrapped by impermeable geomembranes except for the contact part with the gravel blind ditch, the surface of the cushion layer adjacent to the backfill soil above is paved with reverse filtering geotextile, and the surfaces of the base layer and the base layer adjacent to the backfill soil are wrapped by impermeable geomembranes; the hardened layer is paved above backfill soil at the edge side of the pavement, radial rainwater can flow to the side ditch along the surface of the hardened layer, and rainwater in the broken stone infiltration ditch can be drained to the surface of the hardened layer through the water diversion pipe connected with the broken stone infiltration ditch. The edge drainage structure of the asphalt concrete pavement can effectively drain accumulated water in the asphalt concrete pavement.
Description
Technical Field
The utility model relates to the technical field of road and bridge construction, in particular to an asphalt concrete pavement edge drainage structure.
Background
Asphalt concrete is a porous medium, a plurality of pores exist in the asphalt concrete, rainwater can infiltrate into the pavement structure layer through the pores, cracks and the like of the pavement to form accumulated water in the structure layer, the accumulated water can generate dynamic water pressure under the action of wheels, and the pumping action of the dynamic water pressure repeatedly flushes asphalt mixture, so that non-tightly-connected asphalt is stripped from aggregate, and cracks or pits of the pavement are generated, which is also an important cause of early disease generation of asphalt pavement.
How to effectively discharge accumulated water in an asphalt concrete pavement is a technical problem to be solved at present.
Disclosure of utility model
The present utility model has been made in view of the above problems, and has as its object to provide an asphalt concrete pavement edge drainage structure which overcomes or at least partially solves the above problems.
The asphalt concrete pavement edge drainage structure comprises a cushion layer, a base layer and a surface layer which are paved from bottom to top in sequence, wherein the parts of the surface layer, the base layer and the cushion layer, which are positioned at the pavement edge side, are in a step shape overall; the asphalt concrete pavement edge drainage structure comprises side ditches which are arranged on the pavement edge side, broken stone blind ditches which are arranged below the cushion layer and are positioned on the pavement edge side, and the side ditches and the broken stone blind ditches are all arranged along the pavement extending direction; both sides and the bottom side of the gravel blind ditch are wrapped by impermeable geomembranes, the bottom side of the cushion layer is wrapped by impermeable geomembranes except for the contact part with the gravel blind ditch, the surface of the cushion layer adjacent to the backfill soil above is paved with reverse filtering geotextile, and the surfaces of the base layer and the base layer adjacent to the backfill soil are wrapped by impermeable geomembranes;
A hardening layer is paved above backfill soil at the edge side of the pavement, concrete is poured to form a hardening layer, and radial rainwater of the asphalt concrete pavement can flow to side ditches along the surface of the hardening layer;
The asphalt concrete pavement edge drainage structure further comprises a broken stone infiltration ditch paved on the edge side of the pavement adjacent to the lower area of the surface layer, the broken stone infiltration ditch is arranged along the extending direction of the pavement, the periphery of the broken stone infiltration ditch is wrapped with reverse filtering geotechnical cloth, rainwater in the broken stone infiltration ditch can be drained to the surface of the hardening layer through a water conduit connected with the broken stone infiltration ditch, and then flows to the side ditch along the surface of the hardening layer.
In one embodiment, the bottom of the gravel blind ditch is provided with a water permeable pipe.
In one embodiment, the permeable pipe is a curved net-shaped hard permeable pipe, and the upper part of the pipe body is provided with a water inlet.
In one embodiment, in the crushed stone blind drain, the particle size of crushed stone is 1.18-40 mm, wherein the content of the crushed stone with the particle size of 4.75mm or less is not more than 10%, the content of the crushed stone with the particle size of 2.36mm or less is not more than 6%, and the permeability coefficient of the crushed stone with the particle size of more than 2.36mm is more than 6.94cm/s.
In one embodiment, the impermeable geomembrane is an M1/PE impermeable geomembrane, the longitudinal and transverse tensile strength is not less than 12kN/M, the longitudinal and transverse tensile elongation at break is not less than 300%, the longitudinal and transverse right angle tear strength is not less than 30N/mm, the CBR burst strength is not less than 4kN, and the permeability coefficient is not more than 5 multiplied by 10 < -11 > cm/s.
In one embodiment, the reverse filtering geotextile is SNG-PP-300-3 type polypropylene needled nonwoven geotextile, the unit area mass is 300g/m 2, the longitudinal and transverse fracture strength is not less than 9500N/m, the longitudinal and transverse elongation at break is not more than 50%, the permeability coefficient is not less than 5 multiplied by 10-2cm/s, the tearing strength is not less than 240N, and the CBR bursting strength is not less than 1500N.
The edge drainage structure of the asphalt concrete pavement can effectively drain accumulated water in the asphalt concrete pavement, and reduce early diseases of the asphalt pavement.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is evident that the figures in the following description are only some embodiments of the application, from which other figures can be obtained without inventive effort for a person skilled in the art. In the drawings:
fig. 1 is a schematic structural view of an asphalt concrete pavement edge drainage structure according to an exemplary embodiment of the present utility model.
Reference numerals illustrate: 1. a side ditch; 2. gravel blind ditches; 3. an impermeable geomembrane; 4. reversely filtering geotextile; 5. a water permeable pipe; 6. a hardening layer; 7. macadam infiltration ditch; 8. a water conduit; 11. a cushion layer; 12. a base layer; 13. a base layer; 14. a surface layer; 15. backfilling soil.
Detailed Description
Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary for the purpose of illustrating the present utility model and are not to be construed as limiting the present utility model, and various changes, modifications, substitutions and alterations may be made therein by one of ordinary skill in the art without departing from the spirit and scope of the present utility model as defined by the appended claims and their equivalents.
The terms "center," "longitudinal," "transverse," "length," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like in the description of the present utility model refer to an orientation or positional relationship as indicated on the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "comprise," "include," and any variations thereof, are intended to cover a non-exclusive inclusion.
An asphalt concrete pavement edge drainage structure according to an embodiment of the present utility model is described below with reference to the accompanying drawings.
Referring to fig. 1, according to an edge drainage structure of an asphalt concrete pavement of an embodiment of the present utility model, a corresponding asphalt concrete pavement includes a mat layer 11, a base layer 12, a base layer 13, and a surface layer 14, which are laid from bottom to top in sequence, and portions of the surface layer 14, the base layer 13, the base layer 12, and the mat layer 11 located at an edge side of the pavement are generally stepped. The surface layer 14 is a structural layer which directly bears the repeated action of the wheel load and the influence of natural factors, and can consist of 1-3 layers. When the base layer 13 is thicker and needs to be constructed in two layers, the base layer can be divided into an upper base layer and a lower base layer.
The asphalt concrete pavement edge drainage structure comprises a side ditch 1 arranged on the pavement edge side, a broken stone blind ditch 2 arranged below a cushion layer 11 and positioned on the pavement edge side, and the side ditch 1 and the broken stone blind ditch 2 are all arranged along the pavement extending direction. Both sides and the bottom side of the gravel blind ditch 2 are wrapped by the impermeable geomembrane 3, and the bottom side of the cushion layer 11 is wrapped by the impermeable geomembrane 3 except the contact part with the gravel blind ditch 2. After the rainwater infiltrates downwards to the cushion layer 11 through the surface layer 14, the base layer 13 and the subbase layer 12, the seepage-proof geomembrane 3 is not infiltrated downwards any more, but is collected in the gravel blind ditch 2 and is discharged along the gravel blind ditch 2, so that the rainwater infiltrated downwards through the surface layer 14 is effectively discharged, and the accumulated water in the pavement structure is reduced.
The surface of the cushion layer 11 adjacent to the upper backfill 15 is paved with the reverse-filtering geotechnical cloth 4, and the reverse-filtering geotechnical cloth 4 can prevent soil particles in the backfill 15 from entering the cushion layer 11 and the gravel blind ditches 2 along with rainwater. In this embodiment, the bottom of the gravel blind ditch 2 is provided with a water permeable pipe 5, and the anti-filtering geotechnical cloth 4, the cushion layer 11 and the gravel can also filter sediment, so as to prevent the sediment from entering the water permeable pipe 5 to cause blockage. Preferably, the water permeable pipe 5 is a curved net-shaped hard water permeable pipe, the upper part of the pipe body is provided with a water inlet hole, for example, the upper part (2/3) of the pipe body is of a net-shaped structure with holes, and the lower part (1/3) is of a non-hole structure.
The surfaces of the subbase layer 12 and the base layer 13 adjacent to the backfill soil 15 are wrapped by the impermeable geomembrane 3. The impermeable geomembrane 3 can prevent rainwater contained in backfill 15 from penetrating into adjacent underlayments 12 and base 13 so as to reduce accumulated water in the pavement structural layer.
The hardened layer 6 is formed by concrete pouring is paved above the backfill soil 15 at the edge side of the pavement, and the radial rainwater of the asphalt concrete pavement can flow to the side ditch 1 along the surface of the hardened layer 6.
The asphalt concrete pavement edge drainage structure further comprises a broken stone infiltration trench 7 paved on the lower area of the surface layer 14 and adjacent to the pavement edge side, the broken stone infiltration trench 7 is arranged along the extending direction of the pavement, the periphery of the broken stone infiltration trench 7 is wrapped with a reverse filtering geotechnical cloth 4, rainwater in the broken stone infiltration trench 7 can be drained to the surface of the hardened layer 6 through a water diversion pipe 8 connected with the broken stone infiltration trench 7, and then flows to the side trench 1 along the surface of the hardened layer 6.
In this embodiment, the surface layer 14 is composed of 3 layers, and the base layer 13 is composed of an upper base layer and a lower base layer. The broken stone infiltration trench 7 is paved on the edge side of the pavement near the lowest layer area of the surface layer 14, part of rainwater infiltrated into the surface layer 14 is gathered in the broken stone infiltration trench 7 and is drained to the surface of the hardened layer 6 through the water guide pipe 8 connected with the broken stone infiltration trench 7, so that water accumulation in the pavement structural layer is reduced, and then the rainwater flows to the side trench 1 along the surface of the hardened layer 6. The reverse filtering geotextile 4 wrapping the periphery of the broken stone infiltration trench 7 can prevent soil particles in the backfill soil 15 from entering the broken stone infiltration trench 7 along with rainwater on one hand, and filter sediment together with broken stone in the broken stone infiltration trench 7 on the other hand.
In a specific construction example, the crushed stone blind drain 2 has a particle size of 1.18-40 mm, wherein the content of the crushed stone with the particle size of 4.75mm or less is not more than 10%, the content of the crushed stone with the particle size of 2.36mm or less is not more than 6%, and the permeability coefficient of the crushed stone with the particle size of more than 2.36mm is more than 6.94cm/s.
The adopted impermeable geomembrane 3 is an M1/PE impermeable geomembrane, the longitudinal and transverse tensile strength is not less than 12kN/M, the longitudinal and transverse tensile elongation at break is not less than 300%, the longitudinal and transverse right-angle tearing strength is not less than 30N/mm, the CBR bursting strength is not less than 4kN, and the permeability coefficient is not more than 5 multiplied by 10 < -11 > cm/s.
The adopted reverse filtration geotextile 4 is SNG-PP-300-3 polypropylene needled nonwoven geotextile, the unit area mass is 300g/m 2, the longitudinal and transverse fracture strength is not less than 9500N/m, the longitudinal and transverse elongation at break is not more than 50%, the permeability coefficient is not less than 5 multiplied by 10-2cm/s, the tearing strength is not less than 240N, and the CBR bursting strength is not less than 1500N.
The edge drainage structure of the asphalt concrete pavement can effectively drain accumulated water in the asphalt concrete pavement, and reduce early diseases of the asphalt pavement.
Claims (6)
1. The edge drainage structure of the asphalt concrete pavement comprises a cushion layer, a base layer and a surface layer which are paved from bottom to top in sequence, wherein the parts of the surface layer, the base layer and the cushion layer, which are positioned at the edge side of the pavement, are generally in a ladder shape; the method is characterized in that: the asphalt concrete pavement edge drainage structure comprises side ditches which are arranged on the pavement edge side, broken stone blind ditches which are arranged below the cushion layer and are positioned on the pavement edge side, and the side ditches and the broken stone blind ditches are all arranged along the pavement extending direction; both sides and the bottom side of the gravel blind ditch are wrapped by impermeable geomembranes, the bottom side of the cushion layer is wrapped by impermeable geomembranes except for the contact part with the gravel blind ditch, the surface of the cushion layer adjacent to the backfill soil above is paved with reverse filtering geotextile, and the surfaces of the base layer and the base layer adjacent to the backfill soil are wrapped by impermeable geomembranes;
A hardening layer is paved above backfill soil at the edge side of the pavement, concrete is poured to form a hardening layer, and radial rainwater of the asphalt concrete pavement can flow to side ditches along the surface of the hardening layer;
The asphalt concrete pavement edge drainage structure further comprises a broken stone infiltration ditch paved on the edge side of the pavement adjacent to the lower area of the surface layer, the broken stone infiltration ditch is arranged along the extending direction of the pavement, the periphery of the broken stone infiltration ditch is wrapped with reverse filtering geotechnical cloth, rainwater in the broken stone infiltration ditch can be drained to the surface of the hardening layer through a water conduit connected with the broken stone infiltration ditch, and then flows to the side ditch along the surface of the hardening layer.
2. The asphalt concrete pavement edge drainage structure according to claim 1, wherein: the bottom of the gravel blind ditch is provided with a water permeable pipe.
3. The asphalt concrete pavement edge drainage structure according to claim 2, wherein: the water permeable pipe is a curved-grain net-shaped hard water permeable pipe, and the upper part of the pipe body is provided with a water inlet.
4. The asphalt concrete pavement edge drainage structure according to claim 1, wherein: in the gravel blind ditch, the particle size of the gravel is 1.18-40 mm, wherein the content of the gravel with the particle size of below 4.75mm is not more than 10%, the content of the gravel with the particle size of below 2.36mm is not more than 6%, and the permeability coefficient of the gravel with the particle size of more than 2.36mm is more than 6.94cm/s.
5. The asphalt concrete pavement edge drainage structure according to claim 1, wherein: the impermeable geomembrane is an M1/PE impermeable geomembrane, the longitudinal and transverse tensile strength is not less than 12kN/M, the longitudinal and transverse tensile elongation at break is not less than 300%, the longitudinal and transverse right-angle tearing strength is not less than 30N/mm, the CBR bursting strength is not less than 4kN, and the permeability coefficient is not more than 5 multiplied by 10 < -11 > cm/s.
6. The asphalt concrete pavement edge drainage structure according to any one of claims 1 to 5, wherein: the reverse filtration geotextile is SNG-PP-300-3 polypropylene needled nonwoven geotextile, the unit area mass is 300g/m 2, the longitudinal and transverse fracture strength is not less than 9500N/m, the longitudinal and transverse elongation at break is not more than 50%, the permeability coefficient is not less than 5 multiplied by 10-2cm/s, the tearing strength is not less than 240N, and the CBR bursting strength is not less than 1500N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322015428.0U CN220977577U (en) | 2023-07-29 | 2023-07-29 | Asphalt concrete pavement edge drainage structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322015428.0U CN220977577U (en) | 2023-07-29 | 2023-07-29 | Asphalt concrete pavement edge drainage structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220977577U true CN220977577U (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322015428.0U Active CN220977577U (en) | 2023-07-29 | 2023-07-29 | Asphalt concrete pavement edge drainage structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN220977577U (en) |
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2023
- 2023-07-29 CN CN202322015428.0U patent/CN220977577U/en active Active
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