Asphalt pavement structure suitable for low-temperature humid environment
By introducing drainage mechanisms and large-particle crushed stone layers into the asphalt pavement, the problem of slow rainwater drainage in low-temperature and humid environments is solved, enabling rapid drainage, preventing pavement freezing, and improving the pavement structure's resistance to freezing.
Patent Information
- Application Number
- CN202520210175.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-10
AI Technical Summary
In low-temperature and humid environments, rainwater seeps into asphalt pavements but penetrates underground or into drainage systems slowly, causing rainwater to accumulate on the pavement, condense, and freeze, thus affecting the pavement structure.
Drainage mechanisms, including drainage pipes, permeable geotextiles, and stabilizing slabs, are introduced into the asphalt pavement structure. Combined with a large-particle crushed stone layer and an SBS modified asphalt layer, a rapid drainage system is formed to ensure that rainwater is discharged quickly.
It effectively reduces rainwater accumulation on the road surface, prevents freezing at low temperatures, and improves the road surface performance in humid and low-temperature environments.
Smart Images
Figure CN223823959U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of road construction, and in particular to an asphalt pavement structure suitable for low-temperature and humid environments. Background Technology
[0002] Asphalt pavement is a road structure made by mixing asphalt as a binder with mineral materials (such as sand, crushed stone, stone chips, etc.) in a certain proportion, and then paving and compacting it. It has good smoothness, anti-skid performance and durability, and is widely used in urban roads, highways, airport runways and other transportation facilities.
[0003] Asphalt pavement, in terms of structure, is a composite structural system composed of multiple layers of materials, typically including a surface layer, a base layer, and a subbase layer. Each layer has its specific function and role, working together to ensure the pavement's load-bearing capacity, durability, and performance.
[0004] Asphalt pavement generally has good permeability. In low-temperature and humid environments, rainwater seeps into the asphalt pavement and then slowly seeps into the ground or drainage system. However, in low-temperature and humid environments, the efficiency of rainwater seeping into the ground or drainage system after it has entered the pavement is relatively slow. This may cause rainwater to accumulate on the pavement, leading to condensation and freezing, which affects the structure of the asphalt pavement. Utility Model Content
[0005] The purpose of this application is to address the problem mentioned in the background art that, in low-temperature and humid environments, rainwater is slow to seep into the ground or drainage system after entering the road surface, which may cause rainwater to accumulate on the road surface, leading to condensation and freezing, and affecting the asphalt pavement structure. This application provides an asphalt pavement structure suitable for low-temperature and humid environments.
[0006] To achieve the above objectives, this application specifically adopts the following technical solution:
[0007] An asphalt pavement structure suitable for low-temperature and humid environments includes a foundation, a subbase layer disposed on the foundation, a base course layer disposed on the subbase layer, the base course layer being a drainage-stabilized crushed stone layer, a surface course layer disposed on the base course layer, the surface course layer being a permeable asphalt mixture layer, and a drainage mechanism disposed between the base course layer and the subbase layer.
[0008] By adopting the above technical solution, a subbase is laid on the foundation, and then a drainage mechanism is set on the subbase and on both sides of the subbase. Then, a base course is laid on the subbase and the drainage mechanism, and finally, a surface course is laid on the base course. This can reduce the water accumulation in the road surface for a long time and prevent it from affecting the road structure in a low-temperature and humid environment.
[0009] Furthermore, the drainage mechanism includes several drainage pipes laid between the base layer and the subbase layer, two symmetrical drainage channels are fixed on the foundation, several drainage covers are placed on the drainage channels, the two drainage channels are located on both sides of the surface layer, the drainage pipes are connected to the drainage channels, and several drainage holes are opened in the upper part of the drainage pipes.
[0010] By adopting the above technical solution, the drainage pipe is laid on the subbase, and then the base layer is placed on the water pipe. When rainwater enters the base layer, it enters the drainage pipe and then the drainage ditch. This allows rainwater that has seeped into the road surface to flow quickly into the drainage ditch, reducing the accumulation of rainwater on the road surface and preventing it from affecting the road structure in low-temperature environments.
[0011] Furthermore, a permeable geotextile is fixed on the drainage pipe, and the permeable geotextile corresponds to the drainage holes on the drainage pipe.
[0012] By adopting the above technical solution, the permeable geotextile is laid in the drainage holes of the drainage pipe, thereby reducing the amount of gravel from the base layer entering the drainage pipe through the drainage holes.
[0013] Furthermore, stabilizing plates are fixed on both sides of the drainage pipe, and the two sides of the stabilizing plates abut against the base layer and the subbase layer, and the stabilizing plates on adjacent drainage pipes are connected.
[0014] By adopting the above technical solution, stabilizing plates are fixed on both sides of the drainage pipe, and the stabilizing plates are pressed against the subbase, thereby improving the stability of the drainage pipe between the base layer and the subbase.
[0015] Furthermore, both ends of the drainage pipe are fixed with a baffle plate, which is located inside the drainage ditch.
[0016] By adopting the above technical solution, blocking mesh plates are fixed at both ends of the drainage pipe, thereby reducing the amount of foreign objects entering the drainage pipe from the drainage ditch.
[0017] Furthermore, several support rings are fixed inside the drain pipe.
[0018] By adopting the above technical solution, several support rings are fixed inside the drain pipe, thereby improving the stability of the drain pipe.
[0019] Furthermore, the cushion layer is a layer of large-particle crushed stone, and the thickness of the cushion layer is 150 mm.
[0020] By adopting the above technical solution, a subbase layer is laid on the foundation. The subbase layer is a layer of large-particle crushed stone, which can improve the water stability and resistance to cold expansion of the road surface.
[0021] Furthermore, a waterproof layer is provided between the subbase and the foundation, and the waterproof layer is laid on the foundation. The waterproof layer is an SBS modified bitumen layer.
[0022] By adopting the above technical solution, an SBS modified asphalt layer is laid on the foundation, which forms a waterproof layer, thereby reducing the infiltration of groundwater into the base layer and preventing the base layer from freezing.
[0023] In summary, this application includes at least one of the following beneficial effects;
[0024] 1. This application involves laying a subbase on the foundation, fixing several support rings inside the drainage pipes, and then laying several drainage pipes on the subbase with the drainage holes facing upwards. The stabilizing plates on the drainage pipes abut against the subbase, and the stabilizing plates on adjacent drainage pipes are fixed together. Then, a permeable geotextile is laid on the drainage pipes and fixed to them. Drainage channels are then opened on both sides of the subbase, and the drainage pipes extend into the drainage channels. Then, barrier mesh plates are fixed at both ends of the drainage pipes. Then, a base course is laid on the base course, covering the drainage pipes, permeable geotextile, and stabilizing plates. Then, the base course is leveled, and finally, the surface course is laid on the base course, completing the entire asphalt pavement construction. This achieves the goal of allowing rainwater that has seeped into the pavement to quickly flow into the drainage channels, reducing rainwater accumulation on the pavement and minimizing its impact on the pavement structure in low-temperature environments.
[0025] 2. In this application, after the foundation is constructed, before laying the subbase, a layer of SBS modified bitumen is laid on the foundation to form a waterproof layer, thereby reducing the penetration of groundwater into the base layer and preventing the base layer from freezing. Attached Figure Description
[0026] Figure 1 This is a first three-dimensional structural diagram of the asphalt pavement structure in this application;
[0027] Figure 2 This is a schematic diagram of the internal structure of the asphalt pavement structure in this application;
[0028] Figure 3 This is a schematic diagram of the disassembled structure of the asphalt pavement in this application;
[0029] Figure 4 This application Figure 2 Enlarged diagram of point A in the middle.
[0030] Explanation of reference numerals in the attached figures:
[0031] 1. Surface layer; 2. Base layer; 3. Subbase layer; 4. Drainage mechanism; 41. Drainage pipe; 42. Drainage ditch; 43. Drainage hole; 44. Drainage cover; 45. Permeable geotextile; 46. Stabilizing board; 47. Barrier mesh board; 48. Support ring; 5. Foundation; 6. Waterproof layer. Detailed Implementation
[0032] The following is in conjunction with the appendix Figure 1 —4 provides further detailed description of this application.
[0033] This application discloses an asphalt pavement structure suitable for low-temperature and humid environments.
[0034] Reference Figure 1 , Figure 2 and Figure 3 An asphalt pavement structure suitable for low-temperature and humid environments includes a foundation 5, a subbase 3 on the foundation 5, a base course 2 on the subbase 3, the base course 2 being a drainage-stabilized crushed stone layer, a surface course 1 on the base course 2 being a permeable asphalt mixture layer, and a drainage mechanism 4 between the base course 2 and the subbase 3.
[0035] When constructing this asphalt pavement, the road foundation 5 is first built, then a subbase 3 is laid on the foundation 5, and then drainage mechanisms 4 are installed on the subbase 3 and on both sides of the subbase 3. Then, a base course 2 is laid on the subbase 3 and the drainage mechanism 4, and finally, a surface course 1 is laid on the base course 2 to complete the asphalt pavement construction. When it rains, rainwater seeps through the surface course 1 and enters the base course 2. Then, the rainwater enters the drainage mechanism 4 from the base course 2. The drainage mechanism 4 is connected to the external drainage system and quickly drains the rainwater from the road surface. By setting the drainage mechanism 4 between the subbase 3 and the base course 2, the rainwater entering the road surface is quickly drained, thereby reducing the water accumulation in the road surface for a long time and preventing it from affecting the road structure in low temperature and humid environments.
[0036] Reference Figure 2 , Figure 3 and Figure 4 The drainage mechanism 4 includes several drainage pipes 41 laid between the base layer 2 and the subbase 3. Two symmetrical drainage channels 42 are fixed on the foundation 5. Several drainage covers 44 are placed on the drainage channels 42. The two drainage channels 42 are located on both sides of the surface layer 1. The drainage pipes 41 are connected to the drainage channels 42. Several drainage holes 43 are opened in the upper part of the drainage pipes 41.
[0037] In addition, a permeable geotextile 45 is fixed on the drainage pipe 41, and the permeable geotextile 45 corresponds to the drainage hole 43 on the drainage pipe 41.
[0038] Furthermore, stabilizing plates 46 are fixed on both sides of the drainage pipe 41. The two sides of the stabilizing plates 46 abut against the base layer 2 and the pad layer 3, and the stabilizing plates 46 on adjacent drainage pipes 41 are connected.
[0039] Furthermore, both ends of the drain pipe 41 are fixed with a baffle plate 47, which is located inside the drain ditch 42.
[0040] Furthermore, several support rings 48 are fixed inside the drain pipe 41.
[0041] A cushion layer 3 is laid on the foundation 5. Several support rings 48 are fixed inside the drainage pipes 41. Then, several drainage pipes 41 are laid on the cushion layer 3, with the drainage holes 43 of the drainage pipes 41 facing upwards. The stabilizing plates 46 on the drainage pipes 41 abut against the cushion layer 3. The stabilizing plates 46 on adjacent drainage pipes 41 are fixed together. Then, a permeable geotextile 45 is laid on the drainage pipes 41 and fixed together with the drainage pipes 41. Then, drainage ditches 42 are opened on both sides of the cushion layer 3, and the drainage pipes 41 extend into the drainage ditches 42. Then, fix the blocking mesh plate 47 to both ends of the drainage pipe 41, and then lay the base layer 2 on the base layer 2 so that the base layer 2 covers the drainage pipe 41, the permeable geotextile 45, and the stabilizing plate 46. Then flatten the base layer 2, and then lay the surface layer 1 on the base layer 2 to complete the construction of the asphalt pavement. By laying the drainage pipe 41 on the subbase 3, the drainage pipe 41 is connected to the drainage ditch 42 on both sides of the road, so that the rainwater that has seeped into the road can flow into the drainage ditch 42 quickly, reducing the accumulation of rainwater in the road and the impact on the road structure in low temperature environment.
[0042] Reference Figure 1 and Figure 2 Subbase 3 is a layer of large-particle crushed stone with a thickness of 150mm. Subbase 3, which is a layer of large-particle crushed stone, is laid on the foundation 5 to provide stable support for the drainage pipe 41. Subbase 3 improves the water temperature of the foundation 5. By laying large-particle crushed stone on the foundation 5 to form subbase 3, the water stability and resistance to cold expansion of the road surface can be improved.
[0043] Reference Figure 1 and Figure 3 A waterproof layer 6 is installed between the subbase 3 and the foundation 5. The waterproof layer 6 is laid on the foundation 5 and is an SBS modified bitumen layer. After the foundation 5 is constructed, before laying the subbase 3, an SBS modified bitumen layer is laid on the foundation 5 to form the waterproof layer 6. By laying the waterproof layer 6 on the foundation 5, the penetration of groundwater into the base layer 2 can be reduced, and the base layer 2 can be prevented from freezing.
[0044] Working principle: When constructing this asphalt pavement, the road foundation 5 is first built. After the foundation 5 is built, before laying the subbase 3, a layer of SBS modified asphalt is laid on the foundation 5 to form a waterproof layer 6. Then, a layer of large-particle crushed stone is laid on the waterproof layer 6. After laying the subbase 3 on the foundation 5, several support rings 48 are fixed inside the drainage pipes 41. Then, several drainage pipes 41 are laid on the subbase 3, with the drainage holes 43 of the drainage pipes 41 facing upwards. The stabilizing plates 46 on the drainage pipes 41 abut against the subbase 3, and the stabilizing plates 46 on adjacent drainage pipes 41 are fixed together. Finally, a permeable geotextile 45 is laid on the drainage pipes 41 to allow permeability. The geotextile 45 is fixed together with the drainage pipe 41. Then, drainage channels 42 are opened on both sides of the subbase 3, and the drainage pipe 41 extends into the drainage channel 42. Then, the blocking mesh plate 47 is fixed at both ends of the drainage pipe 41. Then, the base course 2 is laid on the base course 2, so that the base course 2 covers the drainage pipe 41, the permeable geotextile 45, and the stabilizing plate 46. Then, the base course 2 is flattened, and then the surface course 1 is laid on the base course 2 to complete the construction of the asphalt pavement. When it rains, rainwater seeps into the base course 2, and then the rainwater passes through the permeable geotextile 45 and enters the drainage pipe 41 through the drainage hole 43 on the drainage pipe 41. Then, the rainwater enters the drainage pipe 41 and then enters the drainage channel 42 from the drainage pipe 41.
Claims
1. An asphalt pavement structure suitable for low-temperature and humid environments, comprising a foundation (5), characterized in that: A cushion layer (3) is provided on the foundation (5), a base layer (2) is provided on the cushion layer (3), the base layer (2) is a drainage-type stabilized crushed stone layer, a surface layer (1) is provided on the base layer (2), the surface layer (1) is a permeable asphalt mixture layer, and a drainage mechanism (4) is provided between the base layer (2) and the cushion layer (3).
2. The asphalt pavement structure suitable for low-temperature and humid environments according to claim 1, characterized in that: The drainage mechanism (4) includes several drainage pipes (41) laid between the base layer (2) and the subbase layer (3). Two symmetrical drainage channels (42) are fixed on the foundation (5). Several drainage covers (44) are placed on the drainage channels (42). The two drainage channels (42) are located on both sides of the surface layer (1). The drainage pipes (41) are connected to the drainage channels (42). Several drainage holes (43) are opened in the upper part of the drainage pipes (41).
3. The asphalt pavement structure suitable for low-temperature and humid environments according to claim 2, characterized in that: A permeable geotextile (45) is fixed on the drainage pipe (41), and the permeable geotextile (45) corresponds to the drainage hole (43) on the drainage pipe (41).
4. The asphalt pavement structure suitable for low-temperature and humid environments according to claim 2, characterized in that: Stabilizing plates (46) are fixed on both sides of the drainage pipe (41). The two sides of the stabilizing plates (46) are in contact with the base layer (2) and the pad layer (3). The stabilizing plates (46) on adjacent drainage pipes (41) are connected.
5. An asphalt pavement structure suitable for low-temperature and humid environments according to claim 2, characterized in that: Both ends of the drain pipe (41) are fixed with a baffle plate (47), which is located inside the drain ditch (42).
6. An asphalt pavement structure suitable for low-temperature and humid environments according to claim 2, characterized in that: Several support rings (48) are fixed inside the drain pipe (41).
7. The asphalt pavement structure suitable for low-temperature and humid environments according to claim 1, characterized in that: The cushion layer (3) is a large-particle crushed stone layer, and the thickness of the cushion layer (3) is 150mm.
8. An asphalt pavement structure suitable for low-temperature and humid environments according to claim 1, characterized in that: A waterproof layer (6) is provided between the cushion layer (3) and the foundation (5). The waterproof layer (6) is laid on the foundation (5) and is an SBS modified bitumen layer.