CN218779258U - Solid waste comprehensive utilization inverted roadbed and pavement structure - Google Patents
Solid waste comprehensive utilization inverted roadbed and pavement structure Download PDFInfo
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- CN218779258U CN218779258U CN202222748247.4U CN202222748247U CN218779258U CN 218779258 U CN218779258 U CN 218779258U CN 202222748247 U CN202222748247 U CN 202222748247U CN 218779258 U CN218779258 U CN 218779258U
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Abstract
The utility model discloses a solid waste utilizes flip-chip road bed road surface structure comprehensively, including the last embankment of the solid waste regeneration aggregate of demolition filling who paves in proper order, by cement-desulfurization slay-gypsum composite stabilization engineering dregs of earth shop, by the road surface subbase of the solid waste regeneration aggregate of demolition shop of desulfurization gypsum-cement stabilization, by the road surface upper base layer of old and useless concrete regeneration aggregate gradation rubble shop, by the road surface under the hot regeneration SBS modified asphalt mixture shop of plantmix and middle-level layer, by the upper surface layer of semi-flexible road surface material shop, by the asphalt wearing and tearing layer of high viscosity modified asphalt mixture shop. The utility model optimizes the combination design according to the stress characteristic and the functional characteristic of each structural layer, is used for high-grade roads, and has the characteristics of long service life, high driving safety and comfort and the like; the material selection of each structural layer accords with the green ecological development concept under the 'double carbon' background, and the reasonable utilization of a large amount of solid wastes in the field of road engineering is realized.
Description
Technical Field
The utility model belongs to the technical field of road engineering, concretely relates to solid waste utilizes flip-chip formula road bed road surface structure comprehensively.
Background
With the urban updating and construction development in China, particularly the construction of new urban areas, a large amount of demolished solid wastes are generated after a large amount of waste buildings are demolished, a large amount of engineering muck is generated by earthwork balance in the construction process, a large amount of recycled SBS modified asphalt pavement materials are generated by digging the pavement, and the stacking and landfill treatment of the solid wastes not only occupies land resources, but also causes environmental pollution. At present, the resource utilization rate of industrial solid wastes such as slag, desulfurized gypsum and the like is low, and based on the resource utilization rate, the method can be called as the comprehensive utilization of solid wastes by simultaneously applying the demolished solid wastes, the engineering muck, the recycled SBS modified asphalt pavement material and the industrial solid wastes to the roadbed pavement structure. The road construction consumes a large amount of sandstone aggregate, the sandstone aggregate is in short supply day by day under the background of ecological green sustainable development, the solid waste is comprehensively utilized in road engineering, on one hand, the resource utilization of multi-source solid waste is realized, on the other hand, the problem of road construction material shortage is solved, and the method has great economic, social and environmental benefits. The research shows that the solid wastes can form high-quality road building materials after being processed and designed with fine mixing proportion.
In recent years, with the introduction of quality engineering, high-quality and high-standard engineering construction and long-life asphalt pavement structures, besides the performance of the pavement itself, insufficient roadbed strength is also a main influence factor which influences the service life of the pavement. The high-grade road in China is mainly of a semi-rigid base asphalt pavement structure in the form of a pavement structure at present, and researches show that the reflection cracks can be effectively prevented by adopting an inverted pavement with graded broken stones laid on the entropy of the semi-rigid base structure and arranging a stress absorption layer. Accordingly, under the background of high-quality sustainable road traffic development in China, the inverted roadbed and pavement structure for comprehensively utilizing solid wastes is designed and provided, and the inevitable requirement for realizing multi-source solid waste resource utilization is met on the premise of ensuring the overall performance of the road structure. Through retrieval, chinese patent CN212714350U discloses a low-grade road structure adopting multi-source solid waste, proposes to adopt inorganic stable demolition solid waste recycled aggregate as a road base layer and plant-mixed hot recycled asphalt mixture paving lower surface layer, and Chinese patent CN209722626U discloses a road structure based on construction waste recycled secondary ash stable inorganic mixture, proposes to adopt secondary ash inorganic stable demolition solid waste recycled aggregate as the road base layer. The above patents do not mention the utilization of solid wastes in the roadbed, and the proposed pavement structure scheme can not simultaneously satisfy the problems of heavy load resistance and self-reflection crack resistance, and the use requirement of whether the pavement structure can reach a long service life needs to be verified because a high-strength roadbed is not adopted.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a solid waste utilizes flip-chip formula road bed pavement structure multipurposely to ensure that all kinds of solid waste can realize extensive comprehensive utilization, and realize the user demand of high-grade road to long-life road surface simultaneously, in order to solve not enough among the prior art.
In order to achieve the above purpose, the purpose of the present invention is achieved by the following technical solutions:
the inverted roadbed and pavement structure comprises an upper embankment, a roadbed, a pavement base layer, a pavement upper base layer, a pavement lower surface layer, a pavement middle surface layer, an upper surface layer, a semi-flexible pavement material and an asphalt wearing layer, wherein the upper embankment is paved by dismantling solid waste regenerated aggregates, the roadbed is paved by cement-desulfurized slag-gypsum composite stable engineering muck, the pavement base layer is paved by desulfurized gypsum-cement stable dismantling solid waste regenerated aggregates, the pavement upper base layer is paved by waste concrete regenerated aggregates in a graded mode, the pavement lower surface layer and the middle surface layer are paved by plant-mixed hot-recycling SBS modified asphalt mixture, the upper surface layer is paved by semi-flexible pavement material, and the asphalt wearing layer is paved by high-viscosity modified asphalt mixture; the pavement lower surface layer and the middle surface layer as well as the middle surface layer and the upper surface layer are connected by adopting modified emulsified asphalt bonding layers, and the pavement subbase layer and the pavement upper base layer are paved with a high-elasticity modified asphalt stress absorbing layer.
If the solid waste is comprehensively utilized by the inverted roadbed and pavement structure, the thickness of the asphalt film on the surface of stone particles in the high-viscosity modified asphalt mixture of the asphalt wearing layer is 15-20 mu m.
The solid waste comprehensive utilization inverted roadbed and pavement structure comprises an upper embankment, a roadbed, a pavement underlayer, an upper base layer, a lower surface layer, an intermediate surface layer, an upper surface layer and an asphalt wearing layer, wherein the structural layer thickness of the upper embankment is 70cm, the thickness of the roadbed is 80cm, the thickness of the pavement underlayer is 30-40cm, the thickness of the upper base layer of the pavement is 18-20cm, the thickness of the lower surface layer of the pavement is 8-9cm, the thickness of the intermediate surface layer is 6-7cm, the thickness of the upper surface layer is 4-5cm, and the thickness of the asphalt wearing layer is 1-2cm.
The road surface structure realizes the maximum comprehensive utilization of various solid wastes such as demolition solid wastes, engineering muck, industrial solid wastes, road surface recovery materials and the like in the road surface structure of the roadbed under the premise of ensuring that the road surface structure of the roadbed has long service life and high driving safety and comfort, and meets the construction requirements of high-treatment high-standard quality engineering under the background of double-carbon and ecological green development. Compared with the prior art, the utility model discloses a beneficial technological effect embodies in:
1. the utility model adopts the road bed paved by cement-slag-desulfurized gypsum composite stable engineering slag soil, the cement-slag-desulfurized gypsum generates hydration reaction, on one hand, the strength of the road bed is enhanced, on the other hand, the road bed has micro-expansibility, the cracking resistance of the road bed is enhanced, the improvement of the strength of the road bed is beneficial to improving the integral strength of a pavement structure, and the service life of the road bed is prolonged;
2. the utility model discloses a lay the flexible basic unit of gradation rubble on semi-rigid basic unit, effectively solved the surface course reflection crack problem that semi-rigid basic unit shrinkages and warp and lead to, set up the stress absorbing layer between semi-rigid basic unit and the flexible basic unit simultaneously, avoided the stress concentration phenomenon that semi-rigid basic unit shrinkages and warp and lead to, further strengthened road surface structure anti reflection crack ability, and then be favorable to prolonging road surface life;
3. the utility model discloses a lay pitch wearing and tearing layer on the top layer on semi-flexible road surface, when guaranteeing that the top layer on road surface has the vehicle load capacity of resisting, promoted the travelling comfort on road surface, also helped the maintenance in later stage operation stage, realized the quick restoration of the anti sliding property in road surface.
Drawings
To further illustrate the above objects, structural features and effects of the present invention, the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the preferred embodiment of the present invention;
in the figure: 1. lifting on the way; 2. a road bed; 3. a pavement sub-base layer; 4. a base course on a road surface; 5. a sub-surface layer of a pavement; 6. a middle layer; 7. a top layer; 8. an asphalt wearing layer; 9. modifying the emulsified asphalt adhesive layer; 10. a high-elasticity modified asphalt stress absorbing layer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Referring to fig. 1, the utility model discloses a solid waste comprehensive utilization flip-chip roadbed pavement structure includes from bottom to top in proper order pave the last embankment 1 that the solid waste regeneration aggregate of demolition was filled on the embankment basis under the road was filled up, by cement-desulfurization slay-gypsum composite stabilization engineering dregs 2 pavements, by desulfurization gypsum-cement stabilization demolition solid waste regeneration aggregate paved road surface subbase 3, by old and useless concrete regeneration aggregate gradation rubble paved road surface upper base 4, by the hot regeneration SBS modified asphalt mixture of plantmix paved road surface lower surface 5 and middle surface 6, by semi-flexible road surface material paved upper surface 7, and by the high viscosity modified asphalt mixture paved asphalt wearing layer 8. The lower pavement layer 5 and the middle pavement layer 6, as well as the middle pavement layer 6 and the upper pavement layer 7 are connected by adopting modified emulsified asphalt bonding layers 9, and a high-elasticity modified asphalt stress absorbing layer 10 is paved between the pavement subbase layer 3 and the pavement upper base layer 4.
Continuing with the illustration, in the preferred embodiment, the upper embankment 1 has a structural layer thickness of 70cm and the heterogeneous coefficient C of the reclaimed aggregate of the upper embankment 1 u In the range of 10 to 50, most preferably 35.
The thickness of the road bed 2 is 80cm, and the bearing ratio CBR value of the composite stabilization engineering slag soil of the road bed 2 is not lower than 10 percent, and the optimal value is 32 percent.
The thickness of the pavement subbase layer 3 is 30-40cm, the optimal thickness is 40cm, the dosage of the desulfurized gypsum is 1.5 percent of the total mass of the composite stable regenerated aggregate, and the dosage of the cement is 5 percent of the total mass of the composite stable regenerated aggregate.
The thickness of the pavement upper base layer 4 is 18-20cm, the mass percentage of the desulfurized gypsum of the pavement upper base layer 4 in the cement is 30%, and the crushing value of the recycled aggregate graded crushed stone of the pavement upper base layer 4 is not lower than 40%, and optimally is not lower than 50%.
The thickness of the pavement lower surface layer 5 is 8 to 9cm, the optimal thickness is 8cm, and the thickness of the middle surface layer 6 is 6 to 7cm, the optimal thickness is 6cm. In the lower surface layer 5 and the middle surface layer 6 of the pavement, the technical performance of the plant-mixed hot-recycling SBS modified asphalt mixture can meet the technical requirements on the SBS modified asphalt mixture in the existing standard road asphalt pavement construction technical standard (JTG F40-2004), and the specific technical performance is shown in the following table:
| technical index | Measured value | Specification requirements |
| Degree of dynamic stability (second mm-1) | 4500 | ≥2800 |
| Residual Strength ratio (%) of Freeze-thaw cleavage test | 90 | ≥80 |
| Low temperature bending test failure strain (mu epsilon) | 3500 | ≥3000 |
The thickness of the upper layer 7 is 4-5 cm, the optimal thickness is 4cm, the semi-flexible pavement material of the upper layer 7 is formed by cement-based slurry grouting in a large-gap asphalt mixture, the void ratio of the asphalt mixture is 25%, and the 70 ℃ dynamic stability of the semi-flexible pavement material is not lower than 30000 times.mm -1 Most preferably 40000 times mm -1 。
The thickness of the asphalt wearing layer 8 is 1 to 2cm, the optimal thickness is 1cm, and the thickness of the asphalt film on the surface of stone particles in the high-viscosity modified asphalt mixture of the asphalt wearing layer 8 is 15 to 20 mu m, the optimal thickness is 18 mu m.
The utility model adopts the road bed paved by cement-slag-desulfurized gypsum composite stable engineering muck, the cement-slag-desulfurized gypsum generates hydration reaction, on one hand, the strength of the road bed is enhanced, on the other hand, the road bed has micro-expansibility, the anti-cracking capability of the road bed is enhanced, the improvement of the strength of the road bed is beneficial to improving the integral strength of a road surface structure, and the service life of the road bed is prolonged; the utility model discloses a lay the flexible basic unit of gradation rubble on semi-rigid basic unit, effectively solved the surface course reflection crack problem that semi-rigid basic unit shrinkages and warp and lead to, set up the stress absorbing layer between semi-rigid basic unit and the flexible basic unit simultaneously, avoided the stress concentration phenomenon that semi-rigid basic unit shrinkages and warp and lead to, further strengthened road surface structure anti reflection crack ability, and then be favorable to prolonging road surface life; the utility model discloses a lay pitch wearing and tearing layer on the top layer on semi-flexible road surface, when guaranteeing that the top layer on road surface has the vehicle load capacity of resisting, promoted the travelling comfort on road surface, also helped the maintenance in later stage operation stage, realized the quick restoration of the anti sliding property in road surface.
The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.
Claims (3)
1. An inverted roadbed and pavement structure for comprehensively utilizing solid wastes is characterized by comprising an upper embankment, a roadbed, a pavement subbase layer, an upper base layer, a lower pavement layer and a middle pavement layer, an upper pavement layer and a high-viscosity asphalt wear layer, wherein the upper embankment is paved on the foundation of the lower embankment of a road in sequence from bottom to top; the pavement lower surface layer and the middle surface layer as well as the middle surface layer and the upper surface layer are connected by adopting modified emulsified asphalt bonding layers, and the pavement subbase layer and the pavement upper base layer are paved with a high-elasticity modified asphalt stress absorbing layer.
2. The inverted roadbed and pavement structure for comprehensive utilization of solid wastes according to claim 1, wherein the thickness of the asphalt film on the surface of stone particles in the high-viscosity modified asphalt mixture of the asphalt wearing layer is 15-20 μm.
3. The inverted roadbed and pavement structure comprehensively utilizing solid wastes as claimed in claim 1, wherein the thickness of the structural layer of the upper embankment is 70cm, the thickness of the roadbed is 80cm, the thickness of the pavement subbase layer is 30 to 40cm, the thickness of the pavement upper base layer is 18 to 20cm, the thickness of the pavement lower layer is 8 to 9cm, the thickness of the middle layer is 6 to 7cm, the thickness of the upper layer is 4 to 5cm, and the thickness of the asphalt wearing layer is 1 to 2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222748247.4U CN218779258U (en) | 2022-10-19 | 2022-10-19 | Solid waste comprehensive utilization inverted roadbed and pavement structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222748247.4U CN218779258U (en) | 2022-10-19 | 2022-10-19 | Solid waste comprehensive utilization inverted roadbed and pavement structure |
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| CN218779258U true CN218779258U (en) | 2023-03-31 |
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| CN202222748247.4U Active CN218779258U (en) | 2022-10-19 | 2022-10-19 | Solid waste comprehensive utilization inverted roadbed and pavement structure |
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