Rubber modified asphalt surface layer pavement structure

Abstract

The utility model relates to the technical field of pavement engineering, in particular to a pavement structure with a rubber modified asphalt surface layer, which comprises a foundation soil layer, a broken stone hardcore arranged on the upper side of the foundation soil layer, a lower surface layer arranged on the upper side of the broken stone hardcore, a middle surface layer arranged on the upper side of the lower surface layer, and an upper surface layer arranged on the upper side of the middle surface layer. Laying grooves are formed in the upper surfaces of the foundation soil layer, the broken stone hardcore layer, the lower surface layer and the middle surface layer, a first bonding layer is arranged between the broken stone hardcore layer and the lower surface layer, a second bonding layer is arranged between the lower surface layer and the middle surface layer, and a third bonding layer is arranged between the middle surface layer and the upper surface layer; the connecting strength among the broken stone hardcore layer, the lower surface layer, the middle surface layer and the upper surface layer is effectively improved through the three bonding layers, the interlayer bonding force is enhanced, meanwhile, the upper layer and the lower layer are meshed and fixed through the laying grooves, the connecting area and friction force between the two surface layers are increased, the interlayer bonding force is further enhanced, and the stability of the asphalt pavement is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pavement engineering, in particular to a rubber-modified asphalt surface layer pavement structure. Background Art

[0002] With the development of society and economy, on the one hand, the reconstruction, expansion and maintenance projects of highways and urban roads at all levels are in full swing. On the other hand, people have higher and higher requirements for the service life and service level of highways and urban roads. Economical and durable asphalt pavement structures and materials have become and will continue to be a hot topic of concern for road workers. With the promotion of national construction concepts such as "sponge city", "low-carbon transportation" and "rural revitalization", large-void cement concrete materials and construction processes with drainage, noise reduction, cooling and other functions have received unprecedented attention, research and development.

[0003] During long-term use, existing asphalt pavements are prone to deformation under the repeated effects of traffic loads and high temperatures, and are prone to offset between the two sets of surface layers, damaging the internal structure, reducing the pavement load strength, and accelerating pavement damage.

[0004] Therefore, it is necessary to invent a rubber modified asphalt surface pavement structure to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a rubber-modified asphalt surface pavement structure to solve the problem that the asphalt pavement is easily deformed under the repeated action of traffic loads and high temperature, and is easily offset between the two groups of surface layers, which damages the internal structure, reduces the pavement load strength, and accelerates the damage to the pavement.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rubber-modified asphalt surface pavement structure, comprising a base soil layer, a crushed stone cushion layer is provided on the upper side of the base soil layer, a lower layer is provided on the upper side of the crushed stone cushion layer, a middle surface layer is provided on the upper side of the lower layer, and an upper layer is provided on the upper side of the middle surface layer, the upper surfaces of the base soil layer, the crushed stone cushion layer, the lower layer and the middle surface layer are all provided with paving grooves, a first bonding layer is provided between the crushed stone cushion layer and the lower layer, a second bonding layer is provided between the lower layer and the middle surface layer, and a third bonding layer is provided between the middle surface layer and the upper layer.

[0007] By adopting the above technical solution, the three sets of bonding layers effectively improve the connection strength between the gravel cushion layer, the lower layer, the middle surface layer and the upper layer, and enhance the interlayer adhesion. At the same time, the upper and lower layers are fixed by biting through the paving groove, which further enhances the interlayer adhesion and effectively improves the stability of the asphalt pavement.

[0008] Optionally, the middle portion of the upper surface of the upper layer is slightly higher than the left and right sides, and water guide grooves are provided on both the left and right sides of the upper layer.

[0009] By adopting the above technical solution, the design of high in the middle and low on both sides allows the accumulated water on the asphalt pavement to be quickly discharged into the water guide grooves on both sides, effectively avoiding the residual water on the road surface, thereby reducing rainwater infiltration, avoiding damage to the roadbed, and further improving the safety of asphalt pavement use.

[0010] Optionally, concrete support plates are provided on the left and right sides of the lower layer, the middle layer and the upper layer, and drainage holes are provided at intervals near the upper ends of the concrete support plates.

[0011] By adopting the above technical solution, the concrete support plate supports the left and right sides of the lower layer, the middle surface layer and the upper layer, effectively reducing the deformation of the lower layer, the middle surface layer and the upper layer.

[0012] Optionally, two groups of first pipe grooves are opened inside the base soil layer at a position below the gravel cushion layer, and first sewer pipes are laid inside the first pipe grooves.

[0013] By adopting the above technical solution, the first sewer pipe is used to receive the seeping rainwater, preventing the rainwater from continuing to penetrate into the base soil layer.

[0014] Optionally, a first fine sand and gravel layer is filled between the first downcomer and the inner wall of the first pipe groove, and a permeable steel mesh is laid on the upper surface of the first pipe groove.

[0015] By adopting the above technical solution, the permeable steel mesh blocks the upper end of the first sewer pipe, thereby achieving drainage while preventing gravel from falling into the first sewer pipe.

[0016] Optionally, second pipe grooves are provided inside the base soil layer at positions on the left and right sides of the gravel cushion layer, and second sewer pipes are laid inside the second pipe grooves.

[0017] By adopting the above technical solution, the second sewer pipe is used to collect and discharge rainwater discharged from the road surface.

[0018] Optionally, a vertical pipe is fixedly connected to the surface of the second downcomer, the upper end of the vertical pipe extends to the ground surface, and a second fine sand and gravel layer is filled between the second downcomer and the inner wall of the second pipe groove.

[0019] Optionally, a drainage pipe is fixedly connected to a position near the upper end of the vertical pipe, and an end of the drainage pipe away from the vertical pipe abuts against the side wall of the concrete support plate.

[0020] By adopting the above technical solution, rainwater discharged from the road surface is discharged into the vertical pipe through the sewer hole and the drainage pipe, and then discharged into the second sewer pipe through the vertical pipe.

[0021] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0022] 1. This new method effectively improves the connection strength between the gravel cushion, lower layer, middle surface layer, and upper layer through three sets of adhesive layers, enhancing interlayer adhesion. At the same time, the upper and lower layers are fixed together through paving grooves, increasing the connection area and friction between the two sets of surface layers, further enhancing interlayer adhesion, and effectively improving the stability of asphalt pavement. This solves the problem that asphalt pavement is prone to deformation under the repeated effects of traffic loads and high temperatures, and is prone to offset between the two sets of surface layers, which can damage the internal structure, reduce the load strength of the pavement, and accelerate pavement damage.

[0023] 2. The utility model lays a first sewer pipe at a position below the gravel cushion layer inside the base soil layer, and lays a second sewer pipe at a position on the left and right sides of the gravel cushion layer inside the base soil layer. The first sewer pipe receives the seeping rainwater to prevent the rainwater from continuing to penetrate into the base soil layer, reducing the damage of the seeping rainwater to the base layer, and at the same time increasing the drainage speed of the road surface and reducing urban waterlogging. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the connection structure between the pavement base layer and the surface layer of the present utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the pavement base layer and the surface layer in a separated state according to the present utility model;

[0027] Figure 4 This is a schematic diagram of the internal structure of the first pipeline groove of the present invention;

[0028] Figure 5 This is a schematic diagram of the internal structure of the second pipeline groove of the present utility model.

[0029] Description of reference numerals:

[0030] 1. Base soil layer; 11. First pipe trough; 12. First sewer pipe; 13. First fine sand and gravel layer; 14. Permeable steel mesh; 15. Second pipe trough; 16. Second sewer pipe; 17. Second fine sand and gravel layer; 18. Vertical pipe; 19. Drain pipe; 2. Gravel cushion layer; 21. First bonding layer; 22. Lower layer; 23. Second bonding layer; 24. Middle surface layer; 25. Third bonding layer; 26. Upper layer; 27. Paving trough; 28. Water guide trough; 3. Concrete support plate; 31. Drain hole. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] The utility model provides Figures 1 to 3 The rubber-modified asphalt pavement structure shown includes a base soil layer 1, a crushed stone cushion layer 2 is provided on the upper side of the base soil layer 1, a lower layer 22 is provided on the upper side of the crushed stone cushion layer 2, a middle layer 24 is provided on the upper side of the lower layer 22, and an upper layer 26 is provided on the upper side of the middle layer 24. The upper surfaces of the base soil layer 1, the crushed stone cushion layer 2, the lower layer 22 and the middle layer 24 are all provided with paving grooves 27. A first bonding layer 21 is provided between the crushed stone cushion layer 2 and the lower layer 22, a second bonding layer 23 is provided between the lower layer 22 and the middle layer 24, and a third bonding layer 25 is provided between the middle layer 24 and the upper layer 26.

[0033] Among them, the upper layer 26 adopts high-viscosity rubber-modified asphalt, and a high-performance rubber-modified asphalt mixture is prepared by adding waste rubber powder and other additives to improve the structural strength and deformation resistance of the upper layer 26. The middle layer 24 adopts conventional rubber-modified asphalt, forming a good bonding transition with the upper layer 26. The lower layer 22 adopts ordinary asphalt mixture, which mainly bears the role of bearing and force transmission, and an adhesive layer is set between the upper layer 26, the middle layer 24, the lower layer 22 and the gravel cushion layer 2 to further enhance the bonding force between the layers.

[0034] In addition, during the construction process, after each layer is laid, a roller with a cam is used to compact the surface layer. During the compaction, a concave paving groove 27 appears on the surface layer. When the upper side layer is laid, the asphalt material will flow into the inside of the paving groove 27, so that the upper and lower side layers are interlocked with each other, thereby increasing the connection area between the two groups of surface layers, further increasing the connection strength between the two groups of surface layers, and avoiding separation and offset between the surface layers.

[0035] See Figure 1 、 Figure 4 and Figure 5, the middle of the upper surface of the upper layer 26 is slightly higher than the left and right sides, and a water guide groove 28 is opened on the left and right sides of the upper layer 26. The lower layer 22, the middle surface layer 24 and the left and right sides of the upper layer 26 are all provided with a concrete support plate 3. The concrete support plate 3 is spaced apart near the upper end and has drainage holes 31. Two groups of first pipe grooves 11 are opened inside the base soil layer 1 at the lower side of the gravel cushion layer 2. The first drainage pipe 12 is laid inside the first drainage pipe 12. The first fine sand and gravel layer 13 is filled between the first drainage pipe 12 and the inner wall of the first drainage pipe 11. The first pipeline A permeable steel mesh 14 is laid on the upper surface of the trough 11, and a second pipe trough 15 is opened inside the base soil layer 1 at the left and right sides of the gravel cushion layer 2. A second sewer pipe 16 is laid inside the second pipe trough 15, and a vertical pipe 18 is fixedly connected to the surface of the second sewer pipe 16. The upper end of the vertical pipe 18 extends to the ground surface. A second fine sand and gravel layer 17 is filled between the second sewer pipe 16 and the inner wall of the second pipe trough 15. A drainage pipe 19 is fixedly connected near the upper end of the vertical pipe 18, and the end of the drainage pipe 19 away from the vertical pipe 18 abuts against the side wall of the concrete support plate 3.

[0036] It should be added that during the road paving process, a first pipe groove 11 and a second pipe groove 15 are opened inside the base soil layer 1, and a sewer pipe is laid inside, and then filled with fine sand and gravel. After the road paving is completed, the upper layer 26 is laid in a state with the middle higher and the two sides lower, and a water guide groove 28 is recessed on the left and right sides. During specific use, the drainage speed of the asphalt pavement is increased by the inclined road surface, and the rainwater is quickly collected through the water guide groove 28, and then the rainwater is quickly collected into the vertical pipe 18 through the sewer hole 31 and the drainage pipe 19, and flows into the second sewer pipe 16, reducing the accumulation of rainwater on the road surface and reducing the damage of rainwater to the road surface. At the same time, the infiltrated rainwater is collected into the first sewer pipe 12, reducing the damage of water to the roadbed and ensuring the bearing capacity of the roadbed.

[0037] The working principle of the utility model is as follows: the connection strength between the crushed stone cushion layer 2, the lower layer 22, the middle surface layer 24 and the upper layer 26 is effectively improved through three groups of adhesive layers, and the interlayer adhesion is enhanced. At the same time, the upper and lower layers are fixed by the paving groove 27, which increases the connection area and friction between the two groups of surface layers, further enhances the interlayer adhesion, and effectively improves the stability of the asphalt pavement.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention.

Claims

1. A rubber-modified asphalt surface pavement structure, comprising a base soil layer (1), characterized in that: A crushed stone cushion layer (2) is provided on the upper side of the base soil layer (1), a lower layer (22) is provided on the upper side of the crushed stone cushion layer (2), a middle surface layer (24) is provided on the upper side of the lower layer (22), and an upper layer (26) is provided on the upper side of the middle surface layer (24). The upper surfaces of the base soil layer (1), the crushed stone cushion layer (2), the lower layer (22) and the middle surface layer (24) are all provided with paving grooves (27). A first adhesive layer (21) is provided between the crushed stone cushion layer (2) and the lower layer (22), a second adhesive layer (23) is provided between the lower layer (22) and the middle surface layer (24), and a third adhesive layer (25) is provided between the middle surface layer (24) and the upper layer (26).

2. The rubber-modified asphalt surface pavement structure according to claim 1, characterized in that: The middle portion of the upper surface of the upper layer (26) is slightly higher than the left and right sides, and water guide grooves (28) are provided on both the left and right sides of the upper layer (26).

3. The rubber-modified asphalt surface pavement structure according to claim 2, characterized in that: Concrete support plates (3) are provided on the left and right sides of the lower layer (22), the middle layer (24) and the upper layer (26), and drain holes (31) are provided at intervals near the upper end of the concrete support plates (3).

4. The rubber-modified asphalt surface pavement structure according to claim 1, characterized in that: Two groups of first pipe grooves (11) are provided inside the base soil layer (1) and located below the gravel cushion layer (2), and first sewer pipes (12) are laid inside the first pipe grooves (11).

5. The rubber-modified asphalt surface pavement structure according to claim 4, characterized in that: A first fine sand and gravel layer (13) is filled between the first downpipe (12) and the inner wall of the first pipe groove (11), and a permeable steel mesh (14) is laid on the upper surface of the first pipe groove (11).

6. The rubber-modified asphalt surface pavement structure according to claim 3, characterized in that: Second pipe grooves (15) are provided inside the base soil layer (1) at positions on the left and right sides of the gravel cushion layer (2), and second sewer pipes (16) are laid inside the second pipe grooves (15).

7. The rubber-modified asphalt surface pavement structure according to claim 6, characterized in that: A vertical pipe (18) is fixedly connected to the surface of the second downpipe (16), the upper end of the vertical pipe (18) extends to the ground surface, and a second fine sand and gravel layer (17) is filled between the second downpipe (16) and the inner wall of the second pipe trough (15).

8. The rubber-modified asphalt surface pavement structure according to claim 7, characterized in that: A drainage pipe (19) is fixedly connected to a position near the upper end of the vertical pipe (18), and one end of the drainage pipe (19) away from the vertical pipe (18) abuts against the side wall of the concrete support plate (3).

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