Anti-rutting asphalt pavement structure based on hard asphalt
By using a hard asphalt concrete layer, fiberglass grid, and drainage system in asphalt pavement, the problem of traditional asphalt pavement being prone to deformation at high temperatures is solved, improving rutting resistance and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-13
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional asphalt pavements are prone to plastic deformation under high-temperature conditions due to vehicle loads, leading to rutting. Furthermore, their weak stress transfer and deformation coordination capabilities result in interlayer shear failure and reflective cracking, thus shortening their service life.
Fine-grained and medium-grained asphalt concrete layers are prepared using hard asphalt, and glass fiber grids and crisscross drainage blind ditches are installed inside the pavement. Combined with a rubber asphalt stress-absorbing layer, a graded structure is formed to enhance the deformation resistance and drainage performance.
It improves the road surface's resistance to rutting and service life, reduces the risk of cracks and rutting caused by stress concentration, and enhances the overall stability and water stability of the road surface.
Smart Images
Figure CN224106212U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to road engineering technical field more particularly to a kind of anti-rutting asphalt pavement structure based on hard pitch. BACKGROUND
[0002] In road engineering, asphalt pavement is widely used due to its good comfort, flatness and convenient construction, etc. However, with the increasing traffic flow and the increasing heavy-duty vehicles, the rutting problem of asphalt pavement is becoming more and more prominent.
[0003] Traditional asphalt concrete has low softening point, and is easy to produce plastic deformation under high temperature environment due to vehicle load, resulting in rutting disease. Especially in heavy traffic sections, repeated wheel compaction causes the surface layer material to gradually accumulate lateral displacement, forming permanent grooves. The stress transfer and deformation coordination ability is weak, and there is lack of effective stress buffer structure between the base layer and the surface layer. The concentrated stress generated by vehicle load is directly transmitted to the roadbed, which easily causes interlayer shear failure and reflection cracks, aggravates the development of rutting, and shortens the service life of the road layer. SUMMARY
[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides an anti-rutting asphalt pavement structure based on hard pitch to solve the problems existing in the background art.
[0005] The utility model provides the following technical scheme: an anti-rutting asphalt pavement structure based on hard pitch, comprising a roadbed, a base layer is laid on top of the roadbed, a stress absorption layer is laid on top of the base layer, an anti-rutting asphalt surface upper layer is laid on top of the stress absorption layer, an anti-rutting asphalt surface lower layer is laid on top of the anti-rutting asphalt surface upper layer, glass fiber grids are placed in the anti-rutting asphalt surface upper layer and the anti-rutting asphalt surface lower layer, and longitudinal and transverse intersecting drainage blind trenches are provided on top of the anti-rutting asphalt surface lower layer and the roadbed.
[0006] Further, the base layer is a gravel layer with a thickness of 12-20 cm.
[0007] Further, the stress absorption layer is a rubber asphalt layer with a thickness of 1-2 cm.
[0008] Further, the anti-rutting asphalt surface upper layer is a medium-grained hard asphalt concrete layer with a thickness of 4-5 cm.
[0009] Further, the anti-rutting asphalt surface lower layer is a fine-grained hard asphalt concrete layer with a thickness of 2-3 cm.
[0010] Further, the glass fiber grid has a mesh size of 5-10mm and is fixed by a high-temperature-resistant adhesive, and the drainage blind ditch is filled with gravel and communicates with the edge drainage ditch.
[0011] Technical effects and advantages of the present application:
[0012] 1. The fine-grained and medium-grained asphalt concrete layers prepared from hard asphalt have high softening point and viscosity, can effectively resist deformation caused by vehicle load under high temperature conditions, improve the anti-rutting ability of the road surface, and the combination of the fine-grained and medium-grained asphalt concrete layers forms a good grading structure, further enhances the overall stability and anti-deformation ability of the road surface, the rubber asphalt stress absorption layer can effectively absorb and disperse the stress generated by the vehicle load, reduce the transmission of stress to the base and roadbed, reduce the risk of cracks and ruts in the road surface structure due to stress concentration, and the high elasticity and flexibility of the rubber asphalt can adapt to the deformation of the road surface and improve the durability of the road surface.
[0013] 2. The longitudinal and transverse intersecting drainage blind ditches arranged in the roadbed can timely drain the accumulated water in the roadbed, avoid the decrease of the roadbed strength and the damage of the road surface caused by the accumulated water, the drainage blind ditches are connected with the drainage ditches to ensure smooth drainage and improve the water stability of the road surface structure, and the glass fiber grid is arranged in the asphalt concrete layer, the glass fiber grid has high tensile strength and modulus, can effectively limit the deformation of the asphalt concrete, enhance the integrity and fatigue resistance of the asphalt concrete layer, and further improve the anti-rutting ability and service life of the road surface. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a structural schematic view of the present application;
[0015] Figure 2 It is Figure 1 a sectional view;
[0016] Figure 3 It is Figure 2 an enlarged view of A in FIG.
[0017] The reference signs are: 1, roadbed; 2, base layer; 3, stress absorption layer; 4, anti-rutting asphalt upper layer; 5, anti-rutting asphalt lower layer; 6, glass fiber grid; 7, drainage blind ditch. DETAILED DESCRIPTION
[0018] The present application will be further described below in combination with specific embodiments, however, people skilled in the art should understand that the detailed description given in combination with the drawings is for better explanation, and the structure of the present application certainly exceeds the limited embodiments, and some equivalent replacement schemes or common means are not described in detail herein, but still belong to the protection scope of the present application.
[0019] Figures 1-3 The utility model discloses a best embodiment, below combined with the drawing Figures 1-3 Further illustrate the utility model.
[0020] A kind of anti-rut asphalt pavement structure based on hard pitch, including roadbed 1, the upper of roadbed 1 is paved with base layer 2, the upper of base layer 2 is paved with stress absorption layer 3, the upper of stress absorption layer 3 is paved with anti-rut asphalt surface upper layer 4, the upper of anti-rut asphalt surface upper layer 4 is paved with anti-rut asphalt surface lower layer 5, glass fibre grid 6 is placed in the inside of anti-rut asphalt surface upper layer 4 and anti-rut asphalt surface lower layer 5, and longitudinal and transverse staggered drainage blind ditch 7 is arranged on the top of anti-rut asphalt surface lower layer 5 and roadbed 1;
[0021] Base layer 2 is broken stone layer, and thickness is 12-20cm.
[0022] In the embodiment, broken stone layer base layer 2 has higher strength and rigidity, can provide stable support foundation for entire pavement structure, disperses stress generated by vehicle load, reduces the deformation of roadbed 1, facilitates construction compaction simultaneously, guarantees pavement overall stability.
[0023] Specifically, stress absorption layer 3 is rubber asphalt layer, and thickness is 1-2cm.
[0024] In the embodiment, rubber asphalt stress absorption layer 3 utilizes high elasticity and flexibility of rubber asphalt, can effectively absorb, disperse stress generated by vehicle load, reduce the transmission of stress to base layer 2 and roadbed 1, reduce the risk of crack and rut of pavement due to stress concentration;Meanwhile, its ability to adapt to pavement deformation can improve structural durability.
[0025] Specifically, anti-rut asphalt surface upper layer 4 is middle-grained hard asphalt concrete layer, and thickness is 4-5cm.
[0026] In the embodiment, middle-grained hard asphalt concrete layer anti-rut asphalt surface upper layer 4 adopts hard pitch, has higher softening point and viscosity, high-temperature deformation resistance is strong, can directly bear vehicle load, reduces surface layer permanent deformation, and middle-grained gradation structure and lower layer fine-grained formation complement each other, enhance the overall strength and anti-rut ability of pavement.
[0027] Specifically, anti-rut asphalt surface lower layer 5 is fine-grained hard asphalt concrete layer, and thickness is 2-3cm.
[0028] In the embodiment, the fine and dense gradation of the fine-grained hard asphalt concrete layer of the anti-rutting asphalt surface lower layer 5 can fill the voids of the medium-grained structure, form a dense surface, and improve the waterproof performance of the pavement; meanwhile, the high viscosity characteristics of the hard asphalt can enhance the interlayer adhesion, and together with the anti-rutting asphalt surface upper layer 4, form an anti-rutting composite structure, and improve the overall stability.
[0029] Specifically, the mesh size of the glass fiber grid 6 is 5-10 mm, and the glass fiber grid 6 is fixed by a high-temperature-resistant adhesive; the interior of the blind drainage ditch 7 is filled with gravel and is communicated with the edge drainage ditch.
[0030] In the embodiment, the glass fiber grid 6 has high tensile strength and modulus, is laid in the anti-rutting asphalt surface upper layer 4 and the anti-rutting asphalt surface lower layer 5, can effectively limit the plastic deformation of the asphalt concrete, enhance the integrity of the surface layer, the mesh size is adapted to the particle size of the asphalt concrete aggregate, avoids the interference between the grid and the aggregate, the high-temperature-resistant adhesive ensures that the grid is closely combined with the asphalt concrete during high-temperature construction and use, and improves the fatigue resistance and anti-rutting capability; the longitudinal and transverse blind drainage ditches 7 arranged on the top of the roadbed 1 and the anti-rutting asphalt surface lower layer 5 form water-permeable channels by filling gravel, can timely drain the accumulated water in the roadbed, avoid the strength reduction and pavement damage caused by the soaking of the accumulated water in the roadbed 1, and ensure smooth drainage and improve the water stability of the pavement structure by being communicated with the edge drainage ditch, thereby prolonging the service life.
[0031] The working principle and use process of the utility model are as follows: in the actual construction process, first, the roadbed 1 is leveled and compacted to reach the designed compactness and flatness, then, the cement stabilized gravel base 2 is laid on the roadbed 1, is spread and compacted according to the designed thickness, and the strength and stability of the base 2 are ensured, then, the rubber asphalt stress absorption layer 3 is laid on the base 2, is spread by using a special rubber asphalt spreading equipment, and a layer of geotextile is laid to ensure the uniformity and integrity of the stress absorption layer 3, after that, the anti-rutting asphalt surface upper layer 4 and the anti-rutting asphalt surface lower layer 5 are laid in sequence, in the laying process, the temperature, spreading speed and compactness of the asphalt concrete are strictly controlled, after the medium-grained hard asphalt concrete layer and the fine-grained hard asphalt concrete layer are spread, the glass fiber grid 6 is laid in time, the high-temperature-resistant adhesive is used to fix the glass fiber grid 6 in the asphalt concrete layer, the close combination of the glass fiber grid 6 and the asphalt concrete layer is ensured, finally, the blind drainage ditch 7 is arranged in the roadbed 1 according to the design requirement, the blind drainage ditch 7 is communicated with the drainage ditch at the edge of the roadbed 1, and the gravel is filled in the blind drainage ditch 7 to ensure the smoothness of the drainage system.
[0032] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution of the present application, and according to the technical essence of the present application, still belong to the protection scope of the technical solution of the present application.
Claims
1. A hard bitumen based anti-rut bituminous pavement structure comprising a sub-base (1) characterised in that: The subgrade (1) is paved with a base layer (2), the base layer (2) is paved with a stress absorption layer (3), the stress absorption layer (3) is paved with an anti-rutting asphalt upper layer (4), the anti-rutting asphalt upper layer (4) is paved with an anti-rutting asphalt lower layer (5), the anti-rutting asphalt upper layer (4) and the anti-rutting asphalt lower layer (5) are internally placed with glass fiber grids (6), and the anti-rutting asphalt lower layer (5) and the subgrade (1) are provided with longitudinally and transversely intersected drainage blind ditches (7) on top.
2. A hard asphalt based anti-rut asphalt pavement structure as claimed in claim 1, wherein: The base layer (2) is a gravel layer, and the thickness is 12-20 cm.
3. A hard asphalt based anti-rut asphalt pavement structure as claimed in claim 1, wherein: The stress absorption layer (3) is a rubber asphalt layer, and the thickness is 1-2 cm.
4. A hard asphalt based anti-rut asphalt pavement structure as claimed in claim 1, wherein: The anti-rutting asphalt upper layer (4) is a medium-grained hard asphalt concrete layer, and the thickness is 4-5 cm.
5. A hard asphalt based anti-rut asphalt pavement structure as claimed in claim 1, wherein: The anti-rutting asphalt lower layer (5) is a fine-grained hard asphalt concrete layer, and the thickness is 2-3 cm.
6. A hard asphalt based anti-rut asphalt pavement structure as claimed in claim 1, wherein: The mesh size of the glass fiber grid (6) is 5-10 mm, and the glass fiber grid (6) is fixed by a high-temperature-resistant adhesive, and the drainage blind ditch (7) is internally filled with gravel and is in communication with an edge drainage ditch.