A base cold-recycled pavement structure
Patent Information
- Application Number
- CN202522278247.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-10-28
AI Technical Summary
[0004]针对现有技术的不足，本申请提供了一种基层冷再生路面结构，克服了现有技术的不足，旨在解决现有技术中的现有的基层冷再生路面结构，路面的整体防水性能有待提升，路面渗水可能会进入再生层的内部，造成内部结构产生沉降或者开裂，造成强度下降的现象，降低路面的使用寿命的问题
1.通过设置基础层，在使用时，间隔层可以作为面层与冷再生层之间的有效间隔，一方面实现面层和冷再生层之间的紧密连接，同时能够起到有效的防水效果，从面层向下渗透的水被防水层阻挡，同时防水层上方的水会向导水槽的内部进行汇聚，向导水槽的两端进行流动排水，设置的碎石层能够对导水槽和面层之间的空间进行有效支撑，同时确保水流能够顺利通过，这样设置有效地阻隔来自面层的渗水，确保了冷再生层的整体干燥性，提升承载力，减少渗水对冷再生层结构强度造成的影响。
Smart Images
Figure CN224754865U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cold recycled pavement technology, and more particularly to a base course cold recycled pavement structure. Background Technology
[0002] Cold recycling pavement structure is a type of pavement structure that reuses old pavement base materials (such as old asphalt surface layer, base crushed stone, cement stabilized materials, etc.) through cold recycling technology (crushing, mixing and paving at room temperature) to form a new base layer. It has advantages such as environmental protection, economy and convenient construction, and is widely used in road overhaul, reconstruction and maintenance projects.
[0003] The existing base-level cold recycled pavement structure has insufficient overall waterproof performance. Water seepage may penetrate into the interior of the recycled layer, causing internal structural settlement or cracking, resulting in reduced strength and shortening the pavement's service life. Utility Model Content
[0004] To address the shortcomings of existing technologies, this application provides a base-level cold recycled pavement structure that overcomes these deficiencies. The aim is to solve the problem that existing base-level cold recycled pavement structures have insufficient overall waterproofing performance, and water seepage may penetrate the recycled layer, causing internal structural settlement or cracking, resulting in reduced strength and shortened pavement lifespan.
[0005] To achieve the above objectives, this application provides the following technical solution: a base cold recycled pavement structure, comprising a base layer, a cold recycled layer laid on top of the base layer, a surface layer laid on top of the cold recycled layer, an interlayer provided between the cold recycled layer and the surface layer, the interlayer including a waterproof layer, the waterproof layer being located between the surface layer and the cold recycled layer, the waterproof layer having multiple sets of water-guiding channels arranged evenly inside the waterproof layer, each set of water-guiding channels having a crushed stone layer inside, the crushed stone layer being located between the surface layer and the water-guiding channels, and all sets of water-guiding channels being arranged laterally.
[0006] By adopting the above technical solution and setting a base layer, the spacer layer can serve as an effective partition between the surface layer and the cold recycled layer during use. On the one hand, it achieves a tight connection between the surface layer and the cold recycled layer, and on the other hand, it provides an effective waterproofing effect. Water seeping downwards from the surface layer is blocked by the waterproof layer, while water above the waterproof layer will converge inside the drainage channel and flow to both ends of the channel for drainage. The set gravel layer can effectively support the space between the drainage channel and the surface layer, while ensuring that water can flow smoothly. This setting effectively blocks water seepage from the surface layer, ensures the overall dryness of the cold recycled layer, improves the load-bearing capacity, and reduces the impact of water seepage on the structural strength of the cold recycled layer.
[0007] As a preferred technical solution of this application, the surface layer includes a coarse asphalt concrete bottom layer, and an asphalt top layer is laid on top of the coarse asphalt concrete bottom layer. The coarse asphalt concrete bottom layer is laid on top of the waterproof layer, the water channel and the crushed stone layer.
[0008] By adopting the above technical solution, and by setting a coarse asphalt concrete bottom layer and an asphalt top layer, the coarse asphalt concrete bottom layer directly bears the vehicle load during use, providing anti-skid and wear-resistant properties. The set asphalt top layer, as an interlayer between the coarse asphalt concrete bottom layer and the interlayer, can disperse and transmit the load and stress borne by the coarse asphalt concrete bottom layer downwards, improve the load-bearing capacity, and ensure the overall structural stability.
[0009] As a preferred technical solution of this application, a connecting mesh layer is laid between the coarse asphalt concrete bottom layer and the asphalt top layer, and the aperture of the connecting mesh layer is set to correspond to the diameter of the internal aggregate of the coarse asphalt concrete bottom layer.
[0010] By adopting the above technical solution and setting a connecting mesh layer, a tighter connection can be achieved between the coarse asphalt concrete bottom layer and the asphalt top layer during use. At the same time, it can also act as a reinforcing rib, further improving the overall structural strength of the surface layer.
[0011] As a preferred technical solution of this application, an asphalt emulsion coating is sprayed on the top surface of the asphalt layer.
[0012] By adopting the above technical solution and setting an asphalt emulsion coating, the surface of the asphalt top layer can be protected during use, thereby improving the overall performance of the asphalt top layer.
[0013] As a preferred technical solution of this application, a cement-stabilized crushed stone layer is provided between the base layer and the cold recycling layer.
[0014] By adopting the above technical solution and setting a cement-stabilized crushed stone layer, effective support can be provided between the base layer and the cold recycling layer during use, further improving the load-bearing capacity of the cold recycling layer and enhancing the structural strength.
[0015] As a preferred embodiment of this application, an oil-adhesive layer is provided between the cold recycling layer and the spacer layer, and the oil-adhesive layer is located at the bottom of the waterproof layer and the water channel.
[0016] By adopting the above technical solution and setting an adhesive layer, a tighter connection between the spacer layer and the cold recycling layer can be ensured. During use, the stability of the connection can be further improved, and the overall integrity of the road surface can be enhanced.
[0017] The beneficial effects of this application are: 1. By setting a base layer, the spacer layer can serve as an effective partition between the surface layer and the cold recycled layer during use. On the one hand, it achieves a tight connection between the surface layer and the cold recycled layer, and on the other hand, it provides an effective waterproofing effect. Water seeping downwards from the surface layer is blocked by the waterproof layer, while water above the waterproof layer will converge inside the drainage channel and flow to both ends of the channel for drainage. The set gravel layer can effectively support the space between the drainage channel and the surface layer, while ensuring that water can flow smoothly. This setting effectively blocks water seepage from the surface layer, ensures the overall dryness of the cold recycled layer, improves the load-bearing capacity, and reduces the impact of water seepage on the structural strength of the cold recycled layer.
[0018] 2. By setting up a coarse asphalt concrete bottom layer and an asphalt top layer, the coarse asphalt concrete bottom layer directly bears the vehicle load during use, providing anti-skid and wear-resistant properties. The set asphalt top layer, as a spacer between the coarse asphalt concrete bottom layer and the spacer layer, can disperse and transmit the load and stress borne by the coarse asphalt concrete bottom layer downwards, improve the load-bearing capacity, and ensure the overall structural stability. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the overall internal structure of this application; Figure 3 This is a schematic diagram of the surface structure of this application; Figure 4 This is a schematic diagram of the spacer layer structure of this application.
[0020] In the diagram: 1. Base layer; 2. Cold recycling layer; 3. Surface layer; 301. Coarse asphalt concrete bottom layer; 302. Asphalt top layer; 303. Connecting mesh layer; 304. Asphalt emulsion coating; 4. Interval layer; 401. Waterproof layer; 402. Water channel; 403. Crushed stone layer; 5. Cement-stabilized crushed stone layer; 6. Adhesive layer. Detailed Implementation
[0021] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0022] Reference Figure 1-4A base course cold recycled pavement structure includes a base layer 1, a cold recycled layer 2 laid on top of the base layer 1, a surface layer 3 laid on top of the cold recycled layer 2, and an interlayer 4 between the cold recycled layer 2 and the surface layer 3. The interlayer 4 includes a waterproof layer 401 located between the surface layer 3 and the cold recycled layer 2. The waterproof layer 401 has multiple sets of water-guiding channels 402 arranged evenly inside, and each set of water-guiding channels 402 has a crushed stone layer 403 located between the surface layer 3 and the water-guiding channels 402. All sets of water-guiding channels 402 are arranged laterally. A connecting mesh layer 303 is laid between the coarse asphalt concrete bottom surface layer 301 and the asphalt top surface layer 302. The aperture of the connecting mesh layer 303 corresponds to the diameter of the aggregate inside the coarse asphalt concrete bottom surface layer 301.
[0023] By setting a base layer 1, the spacer layer 4 can serve as an effective partition between the surface layer 3 and the cold recycled layer 2 during use. On the one hand, it achieves a tight connection between the surface layer 3 and the cold recycled layer 2, and on the other hand, it provides an effective waterproofing effect. Water seeping downwards from the surface layer 3 is blocked by the waterproof layer 401, while water above the waterproof layer 401 will converge inside the water channel 402 and flow to both ends of the water channel 402 for drainage. The crushed stone layer 403 can effectively support the space between the water channel 402 and the surface layer 3, while ensuring that water can flow smoothly. This setup effectively blocks water seepage from the surface layer 3, ensuring the overall dryness of the cold recycled layer 2, improving its load-bearing capacity, and reducing the impact of water seepage on the structural strength of the cold recycled layer 2. By setting a connecting mesh layer 303, a tighter connection can be achieved between the coarse asphalt concrete bottom surface layer 301 and the asphalt top surface layer 302 during use, while also acting as a reinforcing rib, further improving the overall structural strength of the surface layer 3.
[0024] Reference Figure 1-4The surface layer 3 includes a coarse asphalt concrete base layer 301, an asphalt top layer 302 laid on top of the coarse asphalt concrete base layer 301, and the coarse asphalt concrete base layer 301 laid on top of the waterproof layer 401, the water channel 402, and the crushed stone layer 403; an asphalt emulsion coating 304 is sprayed on top of the asphalt top layer 302; an adhesive layer 6 is provided between the cold recycled layer 2 and the spacer layer 4, and the adhesive layer 6 is located at the bottom of the waterproof layer 401 and the water channel 402; by setting the coarse asphalt concrete base layer 301 and the asphalt top layer 302, in use, the coarse asphalt concrete base layer 301 directly bears the vehicle load and can provide With its anti-skid and wear-resistant properties, the asphalt top layer 302 serves as a spacer between the coarse asphalt concrete bottom layer 301 and the spacer layer 4. It can disperse and transmit the load and stress borne by the coarse asphalt concrete bottom layer 301 downwards, improving the load-bearing capacity and ensuring the overall structural stability. By setting the asphalt emulsion coating 304, the surface of the asphalt top layer 302 can be protected during use, improving the overall performance of the asphalt top layer 302. By setting the adhesive layer 6, a tighter connection between the spacer layer 4 and the cold recycled layer 2 can be ensured, further improving the stability of the connection and enhancing the overall integrity of the pavement during use.
[0025] Reference Figure 1-4 A cement-stabilized crushed stone layer 5 is provided between the base layer 1 and the cold recycled layer 2. By providing the cement-stabilized crushed stone layer 5, the base layer 1 and the cold recycled layer 2 can be effectively supported during use, further improving the load-bearing capacity of the cold recycled layer 2 and enhancing the structural strength.
[0026] Working principle: By setting up a base layer 1, the spacer layer 4 acts as an effective separator between the surface layer 3 and the cold recycled layer 2 during use. This ensures a tight connection between the surface layer 3 and the cold recycled layer 2 while also providing effective waterproofing. Water seeping downwards from the surface layer 3 is blocked by the waterproof layer 401, while water above the waterproof layer 401 flows into the drainage channel 402 and drains through both ends. The gravel layer 403 effectively supports the space between the drainage channel 402 and the surface layer 3, ensuring smooth water flow. This design effectively blocks water from... The water permeability of surface layer 3 ensures the overall dryness of cold recycled layer 2, improves load-bearing capacity, and reduces the impact of water permeation on the structural strength of cold recycled layer 2. By setting coarse asphalt concrete bottom layer 301 and asphalt top layer 302, the coarse asphalt concrete bottom layer 301 directly bears the vehicle load during use, providing anti-skid and wear-resistant properties. The asphalt top layer 302 serves as a spacer between the coarse asphalt concrete bottom layer 301 and the spacer layer 4, which can disperse and transmit the load and stress borne by the coarse asphalt concrete bottom layer 301 downwards, improve load-bearing performance, and ensure the overall structural stability. Among them, by setting the connecting mesh layer 303, a tighter connection can be achieved between the coarse asphalt concrete bottom layer 301 and the asphalt top layer 302 during use, and it can also act as a reinforcing rib, which can further improve the overall structural strength of the surface layer 3. By setting the asphalt emulsion coating 304, the surface of the asphalt top layer 302 can be protected during use, and the overall performance of the asphalt top layer 302 can be improved. Meanwhile, by setting up a cement-stabilized crushed stone layer 5, effective support can be provided between the base layer 1 and the cold recycled layer 2 during use, further improving the load-bearing capacity of the cold recycled layer 2 and enhancing the structural strength. In addition, by setting the adhesive layer 6, a tighter connection between the spacer layer 4 and the cold recycling layer 2 can be ensured, which can further improve the stability of the connection and enhance the overall integrity of the road surface during use.
[0027] The above are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A base course cold recycled pavement structure, comprising a base layer (1), characterized in that, A cold recycling layer (2) is laid on top of the base layer (1), and a surface layer (3) is laid on top of the cold recycling layer (2). An interlayer (4) is provided between the cold recycling layer (2) and the surface layer (3). The interlayer (4) includes a waterproof layer (401). The waterproof layer (401) is located between the surface layer (3) and the cold recycling layer (2). Multiple sets of water guiding channels (402) are provided inside the waterproof layer (401). The multiple sets of water guiding channels (402) are evenly arranged inside the waterproof layer (401). A gravel layer (403) is provided inside each of the multiple sets of water guiding channels (402). The gravel layer (403) is located between the surface layer (3) and the water guiding channels (402). The multiple sets of water guiding channels (402) are all arranged horizontally.
2. The base course cold recycled pavement structure according to claim 1, characterized in that, The surface layer (3) includes a coarse asphalt concrete base layer (301), an asphalt top layer (302) is laid on top of the coarse asphalt concrete base layer (301), and the coarse asphalt concrete base layer (301) is laid on top of the waterproof layer (401), the water channel (402) and the crushed stone layer (403).
3. The base course cold recycled pavement structure according to claim 2, characterized in that, A connecting mesh layer (303) is laid between the coarse asphalt concrete bottom layer (301) and the asphalt top layer (302), and the aperture of the connecting mesh layer (303) is set to correspond to the diameter of the internal aggregate of the coarse asphalt concrete bottom layer (301).
4. The base course cold recycled pavement structure according to claim 2, characterized in that, An asphalt emulsion coating (304) is sprayed on top of the asphalt top layer (302).
5. The base course cold recycled pavement structure according to claim 1, characterized in that, A cement-stabilized crushed stone layer (5) is provided between the base layer (1) and the cold recycling layer (2).
6. The base course cold recycled pavement structure according to claim 1, characterized in that, An oil-adhesive layer (6) is provided between the cold recycling layer (2) and the spacer layer (4), and the oil-adhesive layer (6) is located at the bottom of the waterproof layer (401) and the water channel (402).