CN219690224U - Reflection crack treatment structure of large-particle-size crushed stone asphalt pavement - Google Patents
Reflection crack treatment structure of large-particle-size crushed stone asphalt pavement Download PDFInfo
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- CN219690224U CN219690224U CN202320600751.1U CN202320600751U CN219690224U CN 219690224 U CN219690224 U CN 219690224U CN 202320600751 U CN202320600751 U CN 202320600751U CN 219690224 U CN219690224 U CN 219690224U
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- modified asphalt
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- 239000010426 asphalt Substances 0.000 title claims abstract description 89
- 239000004575 stone Substances 0.000 title claims abstract description 20
- 239000010410 layer Substances 0.000 claims abstract description 99
- 239000002344 surface layer Substances 0.000 claims abstract description 12
- 239000011800 void material Substances 0.000 claims abstract description 12
- 230000001360 synchronised effect Effects 0.000 claims abstract description 11
- 239000011384 asphalt concrete Substances 0.000 claims abstract description 10
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000005336 cracking Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000009991 scouring Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 2
- 239000006243 Fine Thermal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Road Paving Structures (AREA)
Abstract
The utility model discloses a reflection crack treatment structure of a large-particle-size broken stone asphalt pavement, and belongs to the technical field of asphalt pavement repair. The reflection crack removing layer is sequentially filled with a crack treatment layer, a penetrating layer, a modified asphalt stress absorbing layer, a large-particle-size broken asphalt crack-resistant upper base layer, a modified asphalt synchronous broken stone sealing layer and a modified asphalt concrete surface layer from bottom to top. The large-particle-size broken stone asphalt crack-resistant upper base layer is a broken-stage matched framework interlocking structure with a large void ratio. The utility model fundamentally improves the stress concentration phenomenon of the asphalt layer, simultaneously timely discharges the water permeated into the asphalt surface layer, prevents the water from seriously scouring the base layer under the action of dynamic water pressure, can effectively inhibit reflection cracks, and has good anti-cracking effect.
Description
Technical Field
The utility model relates to the technical field of asphalt pavement repair, in particular to a reflection crack treatment structure of a large-particle-size crushed stone asphalt pavement.
Background
The reflection cracks are unavoidable cracks of the semi-rigid base layer, after the construction of the semi-rigid base layer is finished, due to the characteristics of materials, the volume stability of the mixture is poor, the thermal shrinkage coefficient is large, and in the health-preserving process of the base layer, fine thermal shrinkage cracks appear on the surface and inside of the semi-rigid base layer under the repeated actions of external environment factors and driving loads. After the vehicle is passed through, under the repeated action of the load of the vehicle, the stress concentration phenomenon is generated at the thermal shrinkage crack, and the semi-rigid base layer is cracked along with the continuous action of the load. The asphalt pavement forms a weak surface at the crack of the base layer, under the action of the pressure of the wheels, the tensile stress at the bottom of the pavement is increased sharply, so that the asphalt pavement is cracked from bottom to top, and the crack of the semi-rigid base layer is reflected to the asphalt pavement, so that the overall structural strength of the pavement is reduced.
At present, most of the reflection crack prevention and control of the semi-rigid base asphalt pavement adopts measures of increasing the thickness of an asphalt layer, arranging a stress absorbing layer, paving a glass fiber grating and the like, can only delay the expansion time of the reflection crack of the asphalt layer, and cannot fundamentally improve the stress concentration phenomenon of the asphalt layer.
The large-particle-size permeable asphalt mixture is a novel skeleton void structure asphalt mixture, not only can improve rutting resistance and drainage performance of an asphalt pavement structure, but also can effectively improve stress concentration phenomenon of an asphalt layer, thereby delaying or avoiding reflection crack diseases induced by load and climatic conditions.
Based on the reflection crack treatment structure of the large-particle-size crushed asphalt pavement, the utility model designs a reflection crack treatment structure of the large-particle-size crushed asphalt pavement to solve the problems.
Disclosure of Invention
The utility model aims to provide a reflection crack treatment structure of a large-particle-size crushed asphalt pavement, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a reflection crack treatment structure of large-grain diameter rubble bituminous paving, includes old road surface structural layer, reflection crack digs the layer from last crack treatment layer, penetrating layer, modified asphalt stress absorbing layer, the crack is gone up basic unit, modified asphalt synchronous rubble seal, modified asphalt concrete surface course of cracking of large-grain diameter rubble bituminous pavement from last in proper order down. The large-particle-size broken stone asphalt crack-resistant upper base layer is a broken-stage matched framework interlocking structure with a large void ratio.
Preferably, the reflective fracture-planed layer has a width of 5cm.
Preferably, the crack treatment layer is an anti-crack patch, and the anti-crack patch is stuck to a crack of the old pavement structure layer in a riding way.
Preferably, the thickness of the modified asphalt stress absorbing layer is 1cm, the modified asphalt stress absorbing layer comprises a modified asphalt layer, and the modified asphalt layer uniform embedding agent is provided with crushed stones with consistent particle sizes.
Preferably, the thickness of the large-particle-size crushed asphalt crack-resistant upper base layer is 8cm, and the void ratio of the large-particle-size crushed asphalt crack-resistant upper base layer skeleton structure is 15% -18%.
Preferably, the thickness of the modified asphalt synchronous macadam sealing layer is 0.5cm, the modified asphalt synchronous macadam sealing layer comprises a modified asphalt layer, and macadam with the particle size of 3-5 mm is scattered on the modified asphalt layer.
Preferably, the thickness of the modified asphalt concrete surface layer is 10cm.
Compared with the prior art, the utility model has the beneficial effects that:
1. in the prior art, measures such as increasing the thickness of an asphalt layer, arranging a stress absorbing layer, paving a glass fiber grating and the like can only delay the expansion time of reflection cracks of the asphalt surface layer, and cannot fundamentally improve the stress concentration phenomenon of the asphalt layer. The structure of the utility model has larger void ratio, can play a role in dissipating stress in the pavement structure, can effectively inhibit reflection cracks, and has good anti-cracking effect.
2. Meanwhile, due to the fact that the void ratio is large, water penetrating into the asphalt surface layer is timely discharged, the water is prevented from seriously scouring the base layer under the action of dynamic water pressure, the base layer is damaged, and reflection cracks are caused.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model;
in the drawings, the list of components represented by the various numbers is as follows:
1. an old pavement structural layer; 2. a reflective crack-gouging layer; 3. a crack treatment layer; 4. penetrating the layer; 5. a modified asphalt stress absorbing layer; 6. cracking an upper base layer of large-particle-size crushed stone asphalt; 7. a modified asphalt synchronous macadam seal layer; 8. a modified asphalt concrete surface layer;
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model.
Examples
Referring to fig. 1, the present utility model provides a technical solution: the utility model provides a reflection crack treatment structure of large-grain diameter rubble bituminous paving, includes old road surface structural layer 1, reflection crack digs layer 2, its characterized in that, reflection crack digs the layer from last crack treatment layer 3, penetrating layer 4, modified asphalt stress absorbing layer 5, the crack is gone up basic unit 6, modified asphalt synchronous rubble seal 7, modified asphalt concrete surface layer 8 of following filling in proper order down. The large-particle-size broken stone asphalt crack-resistant upper base layer 6 is a broken-stage matched framework interlocking structure with large void ratio.
Specifically, the width of the reflection crack removal layer is 5cm.
Specifically, the crack treatment layer 3 is an anti-crack patch, and the anti-crack patch is stuck to a crack of the old pavement structural layer in a riding way.
Specifically, the thickness of the modified asphalt stress absorbing layer is 1cm, the modified asphalt stress absorbing layer 5 comprises a modified asphalt layer, the modified asphalt layer uniform embedding agent is provided with crushed stones with the same particle size, the distribution amount of the crushed stones is about 60% of that of the crushed stones when the crushed stones are fully paved, the crushed stones and the hot-mixed asphalt mixture are mutually embedded and extruded, the crushed stones and the hot-mixed asphalt mixture are integrated under the action of an oil-rich layer, the interlayer bonding capacity is improved in shear strength, and the water damage and reflection crack are effectively prevented.
Specifically, the thickness of the large-particle-size crushed asphalt crack-resistant upper base layer is 6 cm, and the void ratio of the large-particle-size crushed asphalt crack-resistant upper base layer skeleton structure is 15% -18%. In order to ensure the durability of the crack-resistant upper base layer of the large-grain-size large-pore asphalt macadam, the mixture needs to be thicker than an asphalt film, and meanwhile, the mixture needs to be prevented from leaking and loosening, so that asphalt with higher viscosity is adopted.
Specifically, the asphalt practical in this embodiment is a high-elasticity high-viscosity modified asphalt.
Specifically, the thickness of the modified asphalt synchronous macadam seal layer 7 is 0.5cm, the modified asphalt synchronous macadam seal layer comprises a modified asphalt layer, and macadam with the particle size of 3-5 mm is scattered on the modified asphalt layer.
Specifically, the thickness of the modified asphalt concrete surface layer 8 is 10cm. The thickness of the asphalt concrete is increased, and the equivalent stress and the temperature stress of the base layer on the crack resistance of the large-particle-size broken asphalt can be effectively relieved, so that in the embodiment, the thickness of the modified asphalt concrete surface layer 8 is set to be 10cm.
The utility model provides a reflection crack treatment structure of a large-particle-size crushed asphalt pavement, which has a larger void ratio, can play a role in stress dissipation in the pavement structure, can effectively inhibit reflection cracks, and has a good anti-cracking effect. Meanwhile, as the void ratio is large, the water which permeates into the asphalt surface layer is timely discharged, so that the water is prevented from seriously scouring the base layer under the action of dynamic water pressure, the base layer is damaged by water, reflection cracks are caused, and a good anti-cracking effect is achieved.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the utility model disclosed above are merely helpful in illustrating the utility model. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.
Claims (8)
1. The utility model provides a large-particle diameter rubble bituminous paving reflection crack treatment structure, includes old road surface structural layer (1) to and lay reflection crack on old road surface structural layer (1) and dig layer (2), its characterized in that, reflection crack dig layer (2) include from last crack treatment layer (3), penetrating layer (4), modified asphalt stress absorbing layer (5) that fill in proper order of laying down, large-particle diameter rubble bituminous crack-resistant upper base layer (6), modified asphalt synchronous rubble seal (7) and modified asphalt concrete surface layer (8).
2. The large-particle-size crushed asphalt pavement reflection crack treatment structure according to claim 1, wherein: the large-particle-size broken stone asphalt crack-resistant upper base layer (6) is of a broken-stage matched skeleton interlocking structure with a large void ratio.
3. The large-particle-size crushed asphalt pavement reflection crack treatment structure according to claim 2, wherein: the reflective fracture-planed layer (2) has a width of 5cm.
4. The large-particle-size crushed asphalt pavement reflection crack treatment structure according to claim 2, wherein: the crack treatment layer (3) is an anti-crack patch, and the anti-crack patch is stuck to a crack of the old pavement structural layer in a riding way.
5. The large-particle-size crushed asphalt pavement reflection crack treatment structure according to claim 2, wherein: the thickness of the modified asphalt stress absorbing layer (5) is 1cm, the modified asphalt stress absorbing layer (5) comprises a modified asphalt layer, and the modified asphalt layer uniform embedding agent is provided with crushed stones with the same particle size.
6. The large-particle-size crushed asphalt pavement reflection crack treatment structure according to claim 2, wherein: the thickness of the large-particle-size broken stone asphalt crack-resistant upper base layer (6) is 8cm, and the void ratio of the skeleton structure of the large-particle-size broken stone asphalt crack-resistant upper base layer (6) is 15% -18%.
7. The large-particle-size crushed asphalt pavement reflection crack treatment structure according to claim 2, wherein: the thickness of the modified asphalt synchronous macadam sealing layer (7) is 0.5cm, the modified asphalt synchronous macadam sealing layer (7) comprises a modified asphalt layer, and macadam with the particle size of 3-5 mm is spread on the modified asphalt layer.
8. The large-particle-size crushed asphalt pavement reflection crack treatment structure according to claim 2, wherein: the thickness of the modified asphalt concrete surface layer (8) is 10cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320600751.1U CN219690224U (en) | 2023-03-24 | 2023-03-24 | Reflection crack treatment structure of large-particle-size crushed stone asphalt pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320600751.1U CN219690224U (en) | 2023-03-24 | 2023-03-24 | Reflection crack treatment structure of large-particle-size crushed stone asphalt pavement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219690224U true CN219690224U (en) | 2023-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320600751.1U Active CN219690224U (en) | 2023-03-24 | 2023-03-24 | Reflection crack treatment structure of large-particle-size crushed stone asphalt pavement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219690224U (en) |
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2023
- 2023-03-24 CN CN202320600751.1U patent/CN219690224U/en active Active
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