Asphalt road structure

Abstract

The utility model relates to the field of road technology, and in particular to an asphalt road structure. Among them, an asphalt road structure includes a surface layer, a first sealing layer, a base layer, a second sealing layer, and a subbase layer. The drain pipe is partially embedded in the base layer, and the drainage hole of the drain pipe faces the surface layer. Therefore, when cracks occur in the surface layer, rainwater will be blocked by the first sealing layer, and then the rainwater will be drained from the drain pipe, which can well protect the base layer and the subbase layer. The base layer is sandwiched with a geogrid and a first waterproof cloth, and the waterproof cloth can further improve the waterproof ability and prevent rainwater from penetrating from top to bottom. The geogrid can reinforce the base layer to prevent the base layer from cracking and settling. The heat pipe is inserted into the subbase layer, and the heat pipe can discharge the heat of the subbase layer in time, so that the subbase layer can be prevented from freezing and thawing and the stability of the base layer can be improved. The first waterproof cloth is arranged at the slope position, which can effectively prevent rainwater from penetrating from the slope and further improve the waterproof ability of the asphalt road.

Description

Technical Field

[0001] The utility model relates to the technical field of roads, in particular to an asphalt road structure. Background Art

[0002] Most urban roads are made of asphalt roads, which are comfortable and quiet. Most asphalt road structures on the market are composed of a surface layer, a base layer, and a sub-base layer. The surface layer provides driving and prevents rainwater penetration. The main function of the pavement base layer is to support and stabilize the structure of the pavement, while transferring vehicle loads to the underlying soil or rock layer. The pavement cushion layer refers to the structural layer between the base layer or sub-base layer and the roadbed, which mainly plays the role of diffusing load stress and improving the water temperature condition of the roadbed to ensure that the strength, stiffness and stability of the surface layer and the base layer are not adversely affected by changes in the water temperature condition of the soil base. Traditional asphalt pavement structures usually have a sealing layer between the surface layer and the base layer to prevent rainwater from penetrating the base layer, which will damage the base layer and the sub-base layer.

[0003] Asphalt roads will age during use, and cracks will appear in the slabs after aging. At this time, the road surface loses the protection of the surface layer. At this time, rainwater is easily hidden in the cracks of the asphalt. After a long time, rainwater will easily penetrate the sealing layer and enter the base layer.

[0004] For example, Patent No.: CN201921650256.1 A factory-mixed hot-regenerated asphalt road structure specifically discloses "A factory-mixed hot-regenerated asphalt road structure, comprising an SBS modified asphalt mastic crushed stone concrete layer, a hot-regenerated asphalt concrete layer I, a hot-regenerated asphalt concrete layer II, an asphalt surface lower seal layer, a water-stabilizing layer I, a water-stabilizing layer II, a fill layer, a sand and gravel layer, and a fur stone layer, arranged in sequence from top to bottom, wherein a modified emulsified asphalt tack coat oil I and a modified emulsified asphalt tack coat oil II are arranged in sequence between the SBS modified asphalt mastic crushed stone concrete layer and the hot-regenerated asphalt concrete layer I, a layer of modified emulsified asphalt tack coat oil III is arranged between the hot-regenerated asphalt concrete layer I and the hot-regenerated asphalt concrete layer II, and a layer of emulsified asphalt penetration oil is arranged between the asphalt surface lower seal layer and the water-stabilizing layer I". Among them, modified emulsified asphalt tack coat is used as a sealing layer. After the pavement structure ages and cracks appear, rainwater will accumulate in the cracks, especially in the settlement positions where more water will accumulate. Water can easily penetrate the modified emulsified asphalt tack coat from the cracks and easily damage the base layer. Utility Model Content

[0005] In view of this, the present invention aims to overcome the deficiencies of the prior art, and its main purpose is to provide an asphalt road structure, which has a drainage pipe arranged at the base layer to timely drain the accumulated water infiltrated from the surface layer, thereby protecting the roadbed, thereby overcoming the deficiencies of the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The present application provides an asphalt road structure, comprising a surface layer, a first sealing layer, a base layer, a second sealing layer, and a subbase layer, which are arranged in sequence from top to bottom, wherein the first sealing layer is arranged between the surface layer and the base layer; the second sealing layer is arranged between the base layer and the subbase layer; the structure is characterized in that: a drainage pipe is arranged along the slope of the surface layer, the drainage pipe is partially embedded in the base layer, the drainage pipe is provided with a drainage hole, and the drainage hole faces the surface layer; a geogrid and a first waterproof cloth are sandwiched in the base layer; a heat pipe is inserted into the subbase layer; and a second waterproof cloth is arranged at the slope position.

[0008] Preferably, the surface layer is a layered structure formed by rolling a material selected from the group consisting of AC asphalt, SMA asphalt, OGFC asphalt and SUP asphalt.

[0009] Preferably, the first sealing layer and the second sealing layer are one of an asphalt sealing layer, a cement mortar sealing layer, a polyurethane sealing layer, and a plastic sealing layer.

[0010] Preferably, the base layer is a layered structure formed by rolling one of lime-stabilized soil, lime-stabilized aggregate, cement-stabilized soil, cement-stabilized aggregate, lime-fly ash-stabilized soil, and lime-fly ash-stabilized aggregate.

[0011] Preferably, the drainage pipe is a stainless steel pipe or a plastic pipe.

[0012] Preferably, the lower half of the drain pipe is buried in the base layer, and the drainage hole is arranged in the upper half of the drain pipe.

[0013] Preferably, the drainage pipes are connected with connecting pieces.

[0014] Preferably, a protective cloth is arranged on the outer side of the second waterproof cloth, and a filter cloth is arranged on the inner side of the second waterproof cloth.

[0015] Preferably, the second waterproof cloth is a one-way water-permeable film or a plastic film.

[0016] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that an asphalt road structure includes a surface layer, a first sealing layer, a base layer, a second sealing layer, and a subbase layer. The drainage pipe is partially embedded in the base layer, and the drainage pipe is provided with a drainage hole, which faces the surface layer. Therefore, when cracks occur in the surface layer, rainwater will be blocked by the first sealing layer, and then the rainwater will be drained from the drainage pipe, which can well protect the base layer and the subbase layer.

[0017] The base layer is sandwiched with a geogrid and a first waterproof cloth, the first waterproof cloth can further improve the waterproof ability and prevent rainwater from penetrating from top to bottom. The geogrid can reinforce the base layer and prevent the base layer from cracking and settling.

[0018] The heat pipe is inserted into the base layer, and the heat pipe can discharge the heat of the base layer in time, thus preventing the base layer from freezing and thawing and improving the stability of the base layer.

[0019] A second waterproof cloth is installed at the slope to effectively prevent rainwater from penetrating from the slope and further improve the waterproof ability of the asphalt road. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the utility model.

[0021] Figure 2 It is a schematic diagram of a drainage hole in an embodiment of the utility model.

[0022] Description of the accompanying drawings:

[0023] 10, surface layer 11, first sealing layer 12, base layer 13, second sealing layer 14, subbase layer 15, geogrid 116, waterproof cloth 17, heat pipe 18, first waterproof cloth 19, filter cloth 20, drainage pipe 21, drainage hole 22, connector. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0025] Please refer to Figure 1 to Figure 2 As shown, it shows the specific structure of a preferred embodiment of the utility model, which is an asphalt road structure.

[0026] The drainage pipe 20 is partially embedded in the base layer 12 and is provided with drainage holes 21. The first sealing layer 11 seals the rainwater coming down from the surface layer 10. The drainage pipe 20 timely discharges the rainwater coming down from the surface layer 10, which can effectively protect the asphalt road structure.

[0027] The present application provides an asphalt road structure, comprising a surface layer 10, a first sealing layer 11, a base layer 12, a second sealing layer 13, and a subbase layer 14 arranged in sequence from top to bottom, wherein the first sealing layer 11 is arranged between the surface layer 10 and the base layer 12; the second sealing layer 13 is arranged between the base layer 12 and the subbase layer 14; the characteristics are: a drainage pipe 20 is arranged along the slope of the surface layer 10, the drainage pipe 20 is partially embedded in the base layer 12, and the drainage pipe 20 is provided with a drainage hole 21, which faces the surface layer 10; a geogrid 15 and a first waterproof cloth 16 are sandwiched in the base layer 12; a heat pipe 17 is inserted into the subbase layer 14; and a second waterproof cloth 18 is arranged at the side slope. After cracks occur in the surface layer 10, rainwater penetrates downward from the surface layer 10, and then the rainwater is blocked by the first sealing layer 11, so that the rainwater enters the drainage pipe 20 from the drainage hole 21, and then is discharged along the slope of the surface layer 10, so that rainwater can be prevented from penetrating the base layer 12. The first waterproof cloth 16 can further improve the waterproof capability, prevent rainwater from penetrating the base layer 12 from top to bottom, and can well protect the subbase layer 14. The geogrid 15 can reinforce the base layer 12, prevent the base layer 12 from cracking and settling, and can improve its bearing capacity.

[0028] The heat pipe 17 is an evaporation-condensation type heat exchange device, which realizes heat transfer by the change of the state of the working fluid in the pipe. The heat pipe 17 is inserted into the subbase 14, and the heat pipe 17 can discharge the heat of the subbase 14 and the base 12 in time, so that the subbase 14 can be prevented from freezing and thawing, and the stability of the base 12 is improved, especially in permafrost areas. This design has a good protective effect on the frozen soil roadbed.

[0029] A second waterproof cloth 18 is provided at the side slope to effectively prevent rainwater from penetrating from the side slope, further improving the waterproof capability of the asphalt road structure and effectively avoiding landslides.

[0030] Preferably, the surface layer 10 is a layered structure rolled by one of the materials selected from AC, SMA, OGFC, and SUP. 1. AC (Asphalt Concrete): AC refers to asphalt concrete, also known as dense asphalt mixture. It is a common type of asphalt mixture, which is a mixture of asphalt binder and mineral material (aggregate) in a certain proportion. AC has good durability, water tightness and bearing capacity, and is suitable for general roads and highways. 2. SMA (Stone Mastic Asphalt): SMA refers to aggregate pockmarked asphalt mixture, also known as creep asphalt mixture. Compared with AC, SMA adds a certain proportion of mineral powder and asphalt binder to the aggregate to provide better resistance to deformation and cracking, thereby adapting to high-intensity and heavy-load traffic scenarios.

[0031] 3. (Large-pore open-graded drainage asphalt wearing course) Open-graded anti-skid wearing course (OGFC) refers to an asphalt mixture paved with large pores, which can quickly drain rainwater from the road surface from its interior and has excellent properties of anti-skid, anti-rutting and noise reduction. The designed porosity is greater than 18%, and it has a strong structural drainage capacity, which is suitable for the construction of the surface layer or wearing course of asphalt pavement in rainy areas. 4. SUP (Superpave): SUP refers to super asphalt mixture, which is an asphalt mixture based on the Superpave design method. Superpave is a pavement design method that takes into account factors such as traffic, environment and material properties to achieve a more durable and more adaptable pavement to local climatic conditions. According to the actual use conditions and requirements, the SUP asphalt mixture can adjust the material composition to provide better performance types, such as high temperature stability, low temperature crack resistance, durability, etc.

[0032] Preferably, the first sealing layer 11 and the second sealing layer 13 are one of asphalt sealing layer, cement mortar sealing layer, polyurethane sealing layer and plastic sealing layer. In the present embodiment, the first sealing layer 11 and the second sealing layer 13 are asphalt sealing layers, preferably using emulsified asphalt or modified emulsified asphalt as a binder. The thickness of the lower sealing layer should not be greater than or equal to 6 mm, and it should be completely watertight. The cement mortar sealing layer can be constructed by spraying or roller paving. The polyurethane sealing layer is constructed by hot spraying. The plastic sealing layer is used by roller paving.

[0033] Preferably, the base layer 12 is a layered structure formed by rolling one of lime-stabilized soil, lime-stabilized aggregate, cement-stabilized soil, cement-stabilized aggregate, lime-fly ash-stabilized soil, and lime-fly ash-stabilized aggregate.

[0034] Preferably, the drainage pipe 20 is a stainless steel pipe or a plastic pipe, which has great strength and is also beneficial to improving the bearing capacity of the base layer 12.

[0035] Preferably, the lower half of the drain pipe 20 is buried in the base layer 12, and the drain hole 21 is arranged in the upper half of the drain pipe 20. That is, the drain hole 21 is arranged above the horizontal line of the drain pipe 20. In this design, after the first sealing layer 11 blocks the rainwater, the rainwater can fully enter the drain pipe 20 from the drain hole 21, and there will be no residual rainwater, which has a good drainage effect.

[0036] Preferably, the drainage pipes 20 are connected by connecting pieces 22. The connecting piece 22 may be made of metal or plastic. The structure of the connecting piece 22 is compatible with the external structure of the drainage pipe 20. The connecting piece 22 is preferably connected to the drainage pipe 20 by welding, so that multiple drainage pipes 20 are connected together, further improving the bearing capacity of the asphalt road.

[0037] Preferably, a protective cloth 23 is arranged on the outer side of the second waterproof cloth 18, and a filter cloth 19 is arranged on the inner side of the second waterproof cloth 18. Preferably, the second waterproof cloth 18 is a one-way water-permeable film or a plastic film. The protective cloth is preferably a fabric, which can prevent the waterproof cloth 16 from being exposed to the sun and aging. The filter cloth 19 is preferably a cloth that allows water to pass through, but other aggregates and the like cannot pass through, which is conducive to ensuring the service life.

[0038] In summary, the design focus of the utility model is that the drainage pipe 20 of the base layer 12 is partially embedded in the base layer 12, and the drainage hole 21 of the drainage pipe 20 faces the surface layer 10. When cracks appear in the surface layer 10, rainwater will be blocked by the first sealing layer 11, and then the rainwater will be drained from the drainage pipe 20, which can well protect the base layer 12 and the subbase layer 14. The base layer 12 is sandwiched with a geogrid 15 and a first waterproof cloth 16, which correspondingly improves the waterproof ability and bearing capacity of the road, and at the same time prevents the base layer 12 from cracking and settling. The heat pipe 17 can prevent the subbase layer 14 from freezing and thawing, and improve the stability of the base layer 12 and the subbase layer 14. The second waterproof cloth 18 can effectively prevent rainwater from penetrating from the slope, further improving the waterproof ability of the asphalt road.

[0039] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An asphalt road structure, comprising a surface layer, a first sealing layer, a base layer, a second sealing layer, and a subbase layer arranged in sequence from top to bottom, wherein the first sealing layer is arranged between the surface layer and the base layer; the second sealing layer is arranged between the base layer and the subbase layer; characterized in that: The drainage pipe is arranged along the slope of the surface layer, the drainage pipe is partially embedded in the base layer, and the drainage pipe is provided with a drainage hole, which faces the surface layer; the base layer is sandwiched with a geogrid and a first waterproof cloth; the heat pipe is inserted into the bottom base layer; and a second waterproof cloth is arranged at the slope position.

2. An asphalt road structure according to claim 1, characterized in that: The surface layer is a layered structure formed by rolling a material selected from the group consisting of AC asphalt, SMA asphalt, OGFC asphalt and SUP asphalt.

3. The asphalt road structure according to claim 1, characterized in that: The first sealing layer and the second sealing layer are one of an asphalt sealing layer, a cement mortar sealing layer, a polyurethane sealing layer, and a plastic sealing layer.

4. The asphalt road structure according to claim 1, characterized in that: The base layer is a layered structure formed by rolling one of lime stabilized soil, lime stabilized granular material, cement stabilized soil, cement stabilized granular material, lime fly ash stabilized soil, and lime fly ash stabilized granular material.

5. The asphalt road structure according to claim 1, characterized in that: The drainage pipe is a stainless steel pipe or a plastic pipe.

6. The asphalt road structure according to claim 1, characterized in that: The lower half of the drain pipe is buried in the base layer, and the drain hole is arranged in the upper half of the drain pipe.

7. An asphalt road structure according to claim 1 or 5 or 6, characterized in that: The drainage pipes are connected with each other by connecting pieces.

8. The asphalt road structure according to claim 1, characterized in that: A protective cloth is arranged on the outer side of the second waterproof cloth, and a filter cloth is arranged on the inner side of the second waterproof cloth.

9. An asphalt road structure according to claim 1 or 8, characterized in that: The second waterproof fabric is a one-way water-permeable film or a plastic film.

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