CN219808196U - Old road transformation structure based on ultrathin cover surface and in-situ thermal regeneration - Google Patents
Old road transformation structure based on ultrathin cover surface and in-situ thermal regeneration Download PDFInfo
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- CN219808196U CN219808196U CN202320453022.8U CN202320453022U CN219808196U CN 219808196 U CN219808196 U CN 219808196U CN 202320453022 U CN202320453022 U CN 202320453022U CN 219808196 U CN219808196 U CN 219808196U
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- 230000008929 regeneration Effects 0.000 title claims abstract description 64
- 238000011069 regeneration method Methods 0.000 title claims abstract description 64
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 59
- 230000009466 transformation Effects 0.000 title description 2
- 239000010410 layer Substances 0.000 claims abstract description 111
- 239000002344 surface layer Substances 0.000 claims abstract description 74
- 239000000463 material Substances 0.000 claims description 15
- 239000010426 asphalt Substances 0.000 claims description 11
- 239000013521 mastic Substances 0.000 claims description 9
- 239000011384 asphalt concrete Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims 6
- 239000004575 stone Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000003801 milling Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
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- Road Paving Structures (AREA)
Abstract
The utility model discloses an old road reconstruction structure based on ultrathin cover surface and in-situ thermal regeneration, which relates to the technical field of transportation and comprises the following specific schemes: an old road reconstruction structure based on ultrathin overlay and in-situ thermal regeneration comprises a roadbed structure layer, an old road upper layer and an old road overlay layer; the old road upper layer is covered above the roadbed structural layer, and the old road cover layer is covered above the old road upper layer; the old road surface layer comprises an in-situ heat regeneration middle surface layer with a set width, the thickness of the in-situ heat regeneration middle surface layer is larger than that of the old road surface layer so as to extend to the old road surface layer, and an ultrathin surface layer is paved above the in-situ heat regeneration middle surface layer; the method has the advantages that the old pavement structure is fully utilized, the consumption of high-quality aggregates such as basalt crushed stone is reduced, the ultrathin finish layer is used as a surface wearing layer, the effect that the finish layer directly bears the load of a vehicle and the natural environment in-situ thermal regeneration is avoided, the aging rate is effectively reduced, and the service life of the regenerated structural layer is greatly prolonged.
Description
Technical Field
The utility model relates to the technical field of transportation, in particular to an old road reconstruction structure based on ultrathin cover surface and in-situ heat regeneration.
Background
At present, asphalt pavement with middle-sized paving surface in early stage enters a maintenance period again, main diseases of the asphalt pavement are mostly anti-slip attenuation, rutting, cracks and the like, fine-grained asphalt mastic macadam SMA-13 is adopted as an upper layer in part of pavement construction period, and fine-grained asphalt mastic macadam SMA-13 is also adopted as the paving surface in later stage, so that the pavement structure has a double-layer SMA-13 structure.
The structure has longer service life, if a traditional maintenance scheme of milling and re-paving the finish coat is adopted, in the construction process, the original upper surface layer is damaged to a certain extent when the finish coat is milled, meanwhile, due to the existence of ruts, a certain interlayer exists after milling according to normal thickness, and the original upper surface layer is required to be milled completely, so that the scheme has to be changed from milling and planing the re-paving the finish coat into milling and re-paving the finish coat and the upper surface layer, and the double-layer SMA-13 is adopted for the mixture, so that the engineering investment is greatly increased. If the scheme of in-situ heat regeneration treatment is directly adopted, the regenerated heat treatment device directly bears the influence of environmental factors such as vehicle load, illumination, air and the like, and the whole service life is short.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide an old road reconstruction structure based on ultrathin overlay and in-situ thermal regeneration, which fully utilizes the old road structure, reduces the consumption of high-quality aggregates such as basalt crushed stone and the like, takes the ultrathin overlay as a surface wearing layer, avoids the effect that the overlay directly bears the load of a vehicle and the natural environment in-situ thermal regeneration, effectively reduces the aging rate of the overlay, and greatly prolongs the service life of the regenerated structural layer.
In order to achieve the above object, the present utility model is realized by the following technical scheme:
an old road reconstruction structure based on ultrathin overlay and in-situ thermal regeneration comprises a roadbed structure layer, an old road upper layer and an old road overlay layer; the old road upper layer is covered above the roadbed structural layer, and the old road cover layer is covered above the old road upper layer; the old road surface layer comprises an in-situ heat regeneration middle surface layer with a set width, the thickness of the in-situ heat regeneration middle surface layer is larger than that of the old road surface layer so as to extend to the old road surface layer, and an ultrathin surface layer is paved above the in-situ heat regeneration middle surface layer.
As a further implementation, the thickness of the in-situ thermal regeneration middle layer extending to the old overcoat portion is equal to the ultra-thin overcoat thickness.
As a further implementation, the thickness of the in-situ thermal regeneration middle layer extending to the old overcoat portion is less than the ultra-thin overcoat thickness.
As a further implementation, the in-situ thermal regeneration middle layer extends to a thickness of the old overcoat portion that is greater than the ultra-thin overcoat thickness.
As a further implementation manner, the roadbed structure layer comprises an old roadbed layer, an old roadbed lower layer is arranged above the old roadbed layer, and an old road middle surface layer is arranged above the old roadbed lower layer.
As a further implementation manner, the two sides of the roadbed structure layer, the old road surface layer and the old road surface layer are curb stones.
As a further implementation manner, the material of the old road lower layer is coarse-grain asphalt concrete, the material of the old road middle layer is medium-grain asphalt concrete, and the material of the old road upper layer and the old road upper layer is fine-grain asphalt mastic macadam.
As a further implementation, the material of the ultra-thin overcoat layer is an ultra-thin overcoat mixture.
As a further implementation, the in-situ thermal regeneration middle layer and the ultra-thin overcoat are the same width and overlap.
As a further implementation, the in-situ thermal regeneration middle layer and ultra-thin overcoat are located in the roadway section.
The beneficial effects of the utility model are as follows:
1. the thickness of the in-situ thermal regeneration middle surface layer is larger than that of the old road surface layer so as to extend to the old road surface layer, and the ultrathin surface layer is paved above the in-situ thermal regeneration middle surface layer, so that the old road surface structure is fully utilized, the consumption of high-quality aggregates such as basalt crushed stone is reduced, the ultrathin surface layer is used as a surface wearing layer, the effect that the in-situ thermal regeneration middle surface layer directly bears the load of a vehicle and the natural environment is avoided, the aging rate of the in-situ thermal regeneration middle surface layer is effectively reduced, and the service life of a regenerated structural layer is greatly prolonged.
2. According to the utility model, the ultrathin finish coat is additionally paved on the in-situ thermal regeneration middle finish coat, and the bonding strength between the ultrathin finish coat and the in-situ thermal regeneration middle finish coat can be effectively improved due to the high temperature and the rough surface of the regeneration structural layer, so that the overall stress of the pavement structure is facilitated, and the durability of the pavement structure is improved.
3. The utility model carries out in-situ heat regeneration treatment on the old road upper layer at the designated position and the old road cover layer with the set thickness, can effectively eliminate the crack disease of the old road structure, avoid the crack failure of the ultrathin cover layer caused by the reflection of the crack, and prolongs the service life of the ultrathin cover layer.
4. The surface layer and the ultrathin finish coat are positioned at the traffic lane part in-situ thermal regeneration, the structure is flexible to treat, the single-lane implementation can be realized, and the cost increase caused by the whole-lane construction is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic diagram of the overall structure of an old road reconstruction structure based on ultra-thin mat coat and in-situ thermal regeneration in an embodiment of the utility model.
In the figure: the mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustration is only schematic.
Wherein: 1. the edge-stone of the road is provided with a plurality of holes,2. old road surface layer, 3. Old road surface layerOld road middle surface layer, 5 old road lower surface layer, 6 old road base layer, 7 ultrathin surface layer and 8 in-situ thermal regeneration middle surface layer.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
Example 1
In an exemplary embodiment of the present utility model, referring to fig. 1, an old road reconstruction structure based on ultra-thin mat coat, in-situ thermal regeneration, comprises a roadbed structure layer, an old road upper layer 3, and an old road upper layer 2; the old road upper layer 3 is covered above the roadbed structural layer, and the old road cover layer 2 is covered above the old road upper layer 3; the old road surface layer 3 contains an in-situ heat regeneration middle surface layer 8 with a set width, the thickness of the in-situ heat regeneration middle surface layer 8 is larger than that of the old road surface layer 3 so as to extend to the old road surface layer 2, an ultrathin surface layer 7 is paved above the in-situ heat regeneration middle surface layer 8, and the top of the ultrathin surface layer 7 is flush with the top of the old road surface layer 2.
As shown in fig. 1, the roadbed structure layer comprises an old roadbed layer 6, an old roadbed lower layer 5 is laid above the old roadbed layer 6, an old road middle surface layer 4 is arranged above the old roadbed lower layer 5, and the left and right sides of the roadbed structure layer, the old road upper layer 3 and the old road surface layer 2 are the curb stones 1.
The material of the old road lower layer 5 is coarse-grain asphalt concrete, the material of the old road middle layer 4 is medium-grain asphalt concrete, and the material of the old road upper layer 3 and the old road upper layer 2 is fine-grain asphalt mastic macadam.
The old road surface layer 2 of the embodiment is made of fine-grained asphalt mastic macadam SMA-13 with the thickness of 4cm; the old road upper layer 3 is made of fine-grained asphalt mastic macadam SMA-13 with the thickness of 4cm. The material of the middle surface layer 4 of the old road is generally medium-grain asphalt concrete AC-20, and the thickness is 5-6cm. The old road lower layer 5 material is typically coarse-grained asphalt concrete AC-25 with a thickness of 6-8cm. The old roadbed layer 6 material is typically cement stabilized macadam.
Taking the view direction of fig. 1 as an example, from the left side of the curb to the right side of the curb 1, there are a curb belt, a passing lane, a traffic lane and a hard shoulder in this order.
Since the road surface of the traffic lane is most seriously damaged by skid resistance, ruts, cracks and the like, the in-place thermal regeneration middle layer 8 and the ultrathin finish layer 7 of the embodiment are positioned on the traffic lane, and the widths of the in-place thermal regeneration middle layer 8 and the ultrathin finish layer 7 are the same as the width of the traffic lane, and the widths of the in-place thermal regeneration middle layer 8 and the ultrathin finish layer 7 are the same and coincide. The material of the ultrathin overlay 7 is ultrathin overlay mixture.
The structure is flexible to handle, can be implemented in a single lane, and avoids the cost increase caused by the construction of a whole lane.
The curb 1, the old road surface layer 2, the old road surface layer 3, the old road middle surface layer 4, the old road surface layer 5 and the old road surface layer 6 of the present embodiment are original road structures, and the structures do not need to be changed when the old road is modified.
The thickness of the portion of the in-situ thermal regeneration middle overcoat 8 of this embodiment extending to the old overcoat 2 is equal to the thickness of the ultra-thin overcoat 7.
In other embodiments, the thickness of the portion of the in-place thermal regeneration middle overcoat 8 extending to the old overcoat 2 is less than the thickness of the ultra-thin overcoat 7; or the thickness of the portion of the in-situ thermal regeneration middle layer 8 extending to the old road finish layer 2 is greater than the thickness of the ultra-thin finish layer 7.
The old road surface layer 3 of the embodiment is made of fine-grained asphalt mastic macadam SMA-13 with the thickness of 4cm; the old road surface layer 2 is made of fine-grain asphalt mastic macadam SMA-13 with the thickness of 4cm. The double-layer SMA-13 structure has longer service life. When the old road is reformed again, the ultrathin finish 7 is made of ultrathin finish mixture, and the thickness is 2cm. The material of the in-situ thermal regeneration middle surface layer 8 is SMA-13 after in-situ thermal regeneration treatment, and the thickness is 6cm.
The specific operation process is as follows:
firstly milling an old road surface layer 2 (made of SMA-13) with the thickness of 2cm, and performing in-situ thermal regeneration treatment on the rest 2cm old road surface layer 2 (made of SMA-13) and a 4cm old road surface layer 3 (made of SMA-13) to form an in-situ thermal regeneration middle surface layer 8 with the thickness of 6cm SMA-13; then using synchronous paving machine to add and pave ultra-thin cover layer 7 with thickness of 2cm.
In the mode, only the ultra-thin finish layer 7 with the thickness of 2cm is used as the surface wearing layer, so that the consumption of high-quality aggregates such as basalt crushed stones is reduced; the old road SMA-13 mixture is regenerated, so that the old road surface structure is fully utilized, and the consumption of high-quality aggregates such as basalt crushed stone is reduced. Meanwhile, the SMA-13 with the thickness of 6cm is subjected to in-situ thermal regeneration treatment to form an in-situ thermal regeneration middle surface layer, so that the crack diseases of the old road structure can be effectively eliminated, the crack failure of the ultrathin cover layer caused by crack reflection is avoided, and the service life of the ultrathin cover layer is prolonged.
2cm thick ultrathin finish coat 7 is additionally paved on the in-situ thermal regeneration middle surface layer 8, so that the effect that the in-situ thermal regeneration middle surface layer 8 directly bears the load of a vehicle and the natural environment is avoided, the aging rate is effectively reduced, and the service life of a regenerated structural layer is greatly prolonged. Due to the fact that the temperature of the surface layer 8 in the in-situ heat regeneration process is high and the surface is rough, the bonding strength between the ultrathin finish layer 7 and the surface layer 8 in the in-situ heat regeneration process can be effectively improved, the whole stress of the pavement structure is facilitated, and the durability of the pavement structure is improved.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. An old road reconstruction structure based on ultrathin overlay and in-situ thermal regeneration is characterized by comprising a roadbed structure layer, an old road upper layer and an old road overlay layer; the old road upper layer is covered above the roadbed structural layer, and the old road cover layer is covered above the old road upper layer; the old road surface layer comprises an in-situ heat regeneration middle surface layer with a set width, the thickness of the in-situ heat regeneration middle surface layer is 6cm and is larger than that of the old road surface layer so as to extend to the old road surface layer, and an ultrathin surface layer with the thickness of 2cm is paved above the in-situ heat regeneration middle surface layer.
2. The old road reconstruction structure based on ultra-thin finishing, in-place thermal recycling of claim 1, wherein the thickness of the portion of the in-place thermal recycling middle finishing layer extending to the old road finishing layer is equal to the ultra-thin finishing layer thickness.
3. The ultra-thin mat-based, in-situ thermal recycling old pavement structure of claim 1, wherein the thickness of the in-situ thermal recycling middle mat extending to the old pavement mat portion is less than the ultra-thin mat thickness.
4. The ultra-thin mat-based, in-situ thermal recycling old pavement structure of claim 1, wherein the in-situ thermal recycling middle mat extends to a thickness greater than the ultra-thin mat thickness in the old pavement mat portion.
5. The old road reconstruction structure based on ultrathin overlay and in-situ thermal regeneration according to claim 1, wherein the roadbed structure layer comprises an old road base layer, an old road lower layer is arranged above the old road base layer, and an old road middle layer is arranged above the old road lower layer.
6. The ultra-thin finish-based old road reconstruction structure with in-place thermal regeneration according to claim 1, wherein the road bed structural layer, the old road surface layer and the old road finish layer are provided with curb on both sides.
7. The ultra-thin finish-based in-place thermal regeneration old road reconstruction structure according to claim 5, wherein the material of the old road lower layer is coarse-grain asphalt concrete, the material of the old road middle layer is medium-grain asphalt concrete, and the materials of the old road upper layer and the old road finish layer are fine-grain asphalt mastic macadam.
8. The old road reconstruction structure based on ultrathin finishing and in-situ thermal regeneration according to claim 7, wherein the ultrathin finishing layer is made of ultrathin finishing mixture.
9. The old road reconstruction structure based on ultrathin finishing and in-place thermal regeneration according to claim 1, wherein the in-place thermal regeneration middle surface layer and the ultrathin finishing layer have the same width and overlap.
10. The ultra-thin finish, in-situ thermal regeneration-based old road reconstruction structure of claim 9, wherein the in-situ thermal regeneration middle layer and ultra-thin finish layer are located in a roadway section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320453022.8U CN219808196U (en) | 2023-03-06 | 2023-03-06 | Old road transformation structure based on ultrathin cover surface and in-situ thermal regeneration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320453022.8U CN219808196U (en) | 2023-03-06 | 2023-03-06 | Old road transformation structure based on ultrathin cover surface and in-situ thermal regeneration |
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| Publication Number | Publication Date |
|---|---|
| CN219808196U true CN219808196U (en) | 2023-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320453022.8U Active CN219808196U (en) | 2023-03-06 | 2023-03-06 | Old road transformation structure based on ultrathin cover surface and in-situ thermal regeneration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219808196U (en) |
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- 2023-03-06 CN CN202320453022.8U patent/CN219808196U/en active Active
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