CN216338805U - Flexible composite layer pavement structure for resonant rubblization and large-particle-size stone paving - Google Patents
Flexible composite layer pavement structure for resonant rubblization and large-particle-size stone paving Download PDFInfo
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- CN216338805U CN216338805U CN202122340706.0U CN202122340706U CN216338805U CN 216338805 U CN216338805 U CN 216338805U CN 202122340706 U CN202122340706 U CN 202122340706U CN 216338805 U CN216338805 U CN 216338805U
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Abstract
The utility model discloses a resonance rubble and large-particle-size rubble-added flexible composite layer pavement structure which sequentially comprises a surface functional layer, a fine-particle type asphalt layer, a medium-particle type asphalt layer, a rubber asphalt waterproof stress absorption bonding layer, a large-particle-size rubble layer, an organic cementing material bonding layer, an old concrete pavement rubble layer and an old road foundation from top to bottom. This composite bed road surface structure mainly is applied to old concrete pavement and reforms transform, has extensive weather suitability for promote the bearing capacity on old concrete pavement resonance rubble back additional shop flexible pitch layer, reduce the inside probability of moisture invasion road surface structure, reduce the inside temperature in road surface, improve road surface cling compound ability, reduce driving noise, improve reflective capacity. The utility model can effectively avoid the reflection cracks and Top-Down cracks of the road surface, comprehensively improve the bearing capacity, the interlayer interface bonding capacity, the anti-rutting capacity, the anti-skid performance and the durability of the road surface, avoid the damage of the driving vibration to the road surface and reduce the driving noise of the road surface.
Description
Technical Field
The utility model belongs to the technical field of road engineering, and particularly relates to a flexible composite layer pavement structure for a resonance rubble and large-particle-size rubble additionally paved on a rubble-stone road.
Background
After the old cement concrete pavement is used for a long time, various diseases such as plate breakage and fracture, local settlement, joint damage and the like cannot be avoided. In order to solve the problems of the old cement concrete, a scheme of directly paving an asphalt layer is generally adopted. However, the direct laying of the asphalt layer is liable to generate reflection cracks, which is not favorable for the service life of the road surface. Meanwhile, the cement pavement belongs to a rigid pavement, is poor in elasticity and has less absorption of vibration energy generated by driving load. And the flexible pavement has a good vibration energy absorption function, and the vehicle-shaping comfort is greatly improved. Nevertheless, compared with cement pavements, flexible pavements are generally poor in deformation resistance and difficult to resist heavy-duty vehicles.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a resonant rubble and large-particle-size rubble-added flexible composite layer pavement structure which is good in driving comfort, strong in bearing capacity and good in durability.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a resonance rubble stone-breaking and large-particle-size stone-paving flexible composite layer pavement structure sequentially comprises a surface functional layer, a fine-particle type asphalt layer, a medium-particle type asphalt layer, a rubber asphalt waterproof stress absorption bonding layer, a large-particle-size stone breaker layer, an organic cementing material bonding layer, an old concrete pavement stone-breaking layer and an old road foundation from top to bottom.
The surface functional layer is composed of light-colored wear-resistant stone, asphalt and a thermal-resistant material, and a novel acrylic material reflective coating made of high-concentration calcium carbonate particles is coated on the surface of the surface functional layer.
The fine-grain asphalt layer is formed by paving fine-grain asphalt mixture.
The medium-grain asphalt layer is formed by paving medium-grain asphalt mixture, and a high modulus agent is added into the medium-grain asphalt layer.
The rubber asphalt waterproof stress absorbing bonding layer is formed by spreading 2.3kg/m on a large-particle-size gravel layer2Rubber asphalt and crushed stone of 5-10mm grade.
The large-particle-size gravel layer is formed by paving crushed stones with the maximum nominal particle size of 53 mm.
The organic cementing material bonding layer is formed by a glass geogrid.
The old concrete pavement broken stone layer is paved by old concrete pavement broken stones.
Aiming at the problems existing in the flexible transformation of the old concrete pavement by resonance rubble, the inventor designs a pavement structure of a resonance rubble and large-particle-size rubble flexible composite layer, which sequentially comprises a surface functional layer, a fine-particle type asphalt layer, a medium-particle type asphalt layer, a rubber asphalt waterproof stress absorption bonding layer, a large-particle-size rubble layer, an organic cementing material bonding layer, an old concrete pavement rubble layer and an old road foundation from top to bottom. Wherein, the embedding and extruding capacity of the cement road surface after the flexibility is enhanced by additionally laying the large-particle-size gravel layer; an organic cementing material bonding layer is added between the resonance gravel layer and the large-particle-size gravel layer, so that the bonding strength of the resonance gravel layer and the large-particle-size gravel layer is improved; a high modulus agent can be added into the medium-particle asphalt layer to improve the modulus of the asphalt layer and increase the anti-rutting capability of the asphalt layer; the surface functional layer is added on the surface of the asphalt layer, the thermal resistance material with extremely low heat conductivity coefficient is added, the surface compactness, the construction depth, the anti-slip capability and the thermal insulation capability of the pavement structure are comprehensively improved, and the structure layer which is compact in the interior, porous in the surface and has the function of reflecting sunlight is formed, so that the internal temperature of the asphalt pavement is reduced, the probability of Top-Down cracks on the asphalt pavement is reduced, the possibility of water intrusion is reduced, the driving noise is reduced, the light reflection capability is improved, and the thermal-oxidative aging of the lower asphalt layer is prevented. In summary, the above measures can improve the driving comfort of the road surface without reducing the structural bearing capacity, and at the same time improve the durability of the road surface. Therefore, the utility model can be applied to the reconstruction of old concrete pavements, has wide weather applicability and can be suitable for high-altitude large-temperature-difference areas, damp-heat areas and cold areas.
Drawings
FIG. 1 is a schematic view of a resonant rubblization and large-sized stone soft composite layer pavement structure according to the present invention.
In the figure: 1 old road foundation, 2 old concrete pavement rubble layers, 3 organic cement adhesive layers, 4 large-particle-size rubble layers, 5 rubber asphalt waterproof stress absorption adhesive layers, 6 medium-particle asphalt layers, 7 fine-particle asphalt layers and 8 surface functional layers.
Detailed Description
As shown in fig. 1, the resonance rubblization and large-particle-size rubble flexible composite layer pavement structure of the utility model sequentially comprises a surface functional layer, a fine-particle type asphalt layer, a medium-particle type asphalt layer, a rubber asphalt waterproof stress absorption bonding layer, a large-particle-size rubble layer, an organic cementing material bonding layer, an old concrete pavement rubble layer and an old pavement foundation from top to bottom. Wherein the content of the first and second substances,
the surface functional layer is made of light-colored wear-resistant stone, asphalt and thermal-resistance material with extremely low thermal conductivity coefficient.
The fine-grain asphalt layer is formed by paving fine-grain asphalt mixture.
The medium-particle asphalt layer is formed by paving medium-particle asphalt mixture, and a high modulus agent is added to improve the anti-rutting capability of the asphalt layer.
The rubber asphalt waterproof stress absorbing bonding layer is formed by spreading 2.3kg/m on a large-particle-size gravel layer2Rubber asphalt and crushed stone of 5-10mm grade.
The large-particle-size gravel layer is formed by paving crushed stones with the maximum nominal particle size of 53 mm.
The organic cementing material bonding layer is formed by a glass geogrid.
The old concrete pavement broken stone layer is paved by old concrete pavement broken stones, and can form an embedded and extruded structure.
When the composite layer structure is applied, the old concrete pavement is subjected to resonant rubblization and is rolled by a steel wheel road roller to form an old concrete pavement rubble layer; then a layer of glass fiber geogrid is laid, the thickness is 0.5cm, the bottom surface is smooth and compact when the geogrid is laid, and the geogrid is generally laidLaying and straightening the geogrids, avoiding overlapping, curling and twisting, lapping two adjacent geogrids by 0.2m, inserting and connecting the lapped parts of the geogrids every 1m in the transverse direction of the roadbed by 8 # iron wires, and fixing the lapped parts of the geogrids on the ground by U-shaped nails every 1.5-2m on the paved grids to form an organic cementing material bonding layer; paving a large-particle-size crushed stone layer (the thickness is 25 cm-30 cm), wherein the large-particle-size crushed stone layer with the optimal water content has the resilience modulus of more than 600 MPa; 2.3kg/m of crushed stone is sprayed on the large-particle-size crushed stone layer2Rubber asphalt and a proper amount of crushed stone with the grade of 5-10mm form a rubber asphalt waterproof stress absorbing bonding layer (the thickness is 1-2 cm); then, paving a medium grain type asphalt mixture (thickness is 4-8cm) of a high modulus agent (product name: LT high modulus asphalt mixture modifier; manufacturer: Shenzhen Lute New Material science and technology Co., Ltd.) blended (0.3% of asphalt mass), and paving a fine grain type asphalt mixture on the medium grain type asphalt mixture; finally, paving a surface functional layer, wherein the surface functional layer is formed by blending light-colored wear-resistant stone, asphalt and hollow polyester fiber (product name: polyester staple fiber; product material: PET (polyester); product specification: 2.0D 51mm) according to a certain ratio (95:4:1) to form an internal compact and surface porous structure; after the completion, a proper amount of asphalt pavement heat reflection paint (Chinese patent application, CN101824269A) is coated on the surface functional layer.
Research shows that the composite layer structure has the following outstanding advantages:
1) the bearing capacity and the service life of the road surface can be improved, and the cumulative acting load of the road surface is improved by 20 to 30 percent compared with the common resonance rubblization and asphalt layer paving.
2) The surface functional layer has the functions of heat insulation and heat preservation, delays the thermo-oxidative aging process of the lower asphalt layer and reduces the probability of Top-Down fatigue failure of the asphalt layer;
3) the anti-skid capability of the road surface is comprehensively improved, the swing value of the road surface can reach 70BPN, and the construction depth can reach 1.3mm
4) The driving noise is reduced by more than 15 dB.
Claims (8)
1. A resonance rubble and large-particle-size gravel-paved flexible composite layer pavement structure is characterized by sequentially comprising a surface functional layer, a fine-particle type asphalt layer, a medium-particle type asphalt layer, a rubber asphalt waterproof stress absorption bonding layer, a large-particle-size gravel layer, an organic cementing material bonding layer, an old concrete pavement gravel layer and an old road foundation from top to bottom.
2. The resonant rubblized and large particle size rubble flexible composite layered pavement structure of claim 1, wherein: the surface functional layer is made of light-colored wear-resistant stone, asphalt and a thermal-resistant material, and a reflective coating is coated on the surface of the surface functional layer.
3. The resonant rubblized and large particle size rubble flexible composite layered pavement structure of claim 1, wherein: the fine-grain asphalt layer is formed by paving fine-grain asphalt mixture.
4. The resonant rubblized and large particle size rubble flexible composite layered pavement structure of claim 1, wherein: the medium-particle asphalt layer is formed by paving medium-particle asphalt mixture, and a high modulus agent is added.
5. The resonant rubblized and large particle size rubble flexible composite layered pavement structure of claim 1, wherein: the rubber asphalt waterproof stress absorbing bonding layer is formed by spreading 2.3kg/m on a large-particle-size gravel layer2Rubber asphalt and crushed stone of 5-10mm grade.
6. The resonant rubblized and large particle size rubble flexible composite layered pavement structure of claim 1, wherein: the large-particle-size gravel layer is formed by paving crushed stones with the maximum nominal particle size of 53 mm.
7. The resonant rubblized and large particle size rubble flexible composite layered pavement structure of claim 1, wherein: the organic cementing material bonding layer is composed of glass geogrids.
8. The resonant rubblized and large particle size rubble flexible composite layered pavement structure of claim 1, wherein: the old concrete pavement broken stone layer is paved by old concrete pavement broken stones.
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| CN202122340706.0U CN216338805U (en) | 2021-09-26 | 2021-09-26 | Flexible composite layer pavement structure for resonant rubblization and large-particle-size stone paving |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991000A (en) * | 2022-05-05 | 2022-09-02 | 广西交科集团有限公司 | Expansion joint structure of simply supported beam bridge and design method thereof |
| CN115506191A (en) * | 2022-09-08 | 2022-12-23 | 广西北投交通养护科技集团有限公司 | Durable asphalt pavement structure suitable for non-heavy traffic grade and design method |
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2021
- 2021-09-26 CN CN202122340706.0U patent/CN216338805U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991000A (en) * | 2022-05-05 | 2022-09-02 | 广西交科集团有限公司 | Expansion joint structure of simply supported beam bridge and design method thereof |
| CN115506191A (en) * | 2022-09-08 | 2022-12-23 | 广西北投交通养护科技集团有限公司 | Durable asphalt pavement structure suitable for non-heavy traffic grade and design method |
| CN115506191B (en) * | 2022-09-08 | 2023-10-13 | 广西北投交通养护科技集团有限公司 | Durable asphalt pavement structure suitable for non-extra-heavy traffic grade and design method |
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