Roadbed structure of asphalt pavement

Abstract

The utility model provides a roadbed structure of an asphalt pavement, which relates to the technical field of roadbed structures and comprises a subbase layer, a cushion layer, the asphalt pavement and a drainage mechanism. According to the roadbed structure of the asphalt pavement, the cushion layer is laid on the subbase layer until the drainage mechanism is covered, so that the upper surface of the cushion layer is flush with the upper surface of the water collecting hopper, the waterproof layer is laid on the cushion layer, then the asphalt pavement continues to be laid on the waterproof layer, and when asphalt is laid, the asphalt enters the water collecting hopper from the upper portion of the water collecting hopper and is laid on the battens fully; when accumulated water permeates into the asphalt pavement subsequently, the accumulated water cannot pass through the waterproof layer, can be gathered into the water collecting hopper, flows into the bottom of the water collecting hopper through the water seepage seams between the battens, and is discharged outwards from the pipe seat through the water outlet pipe, so that the accumulated water can be prevented from staying in the asphalt pavement for a long time; and meanwhile, the accumulated water is discharged through the drainage mechanism and cannot enter the roadbed, so that the roadbed cannot be eroded by the accumulated water.

Description

Technical Field

[0001] This utility model relates to the field of roadbed structure technology, and in particular to a roadbed structure for asphalt pavement. Background Technology

[0002] Asphalt pavement is a common road paving method, usually installed on top of the roadbed structure. Prolonged water accumulation on asphalt pavement accelerates the aging of the asphalt material. The combination of moisture and sunlight causes oxidation of the asphalt surface, making it brittle and losing elasticity. In particular, long-term contact between asphalt and water easily leads to cracks and degradation of the pavement, significantly shortening its lifespan and increasing maintenance costs.

[0003] Asphalt pavements require a solid and stable subgrade for support. When water seeps into the subgrade from the asphalt surface, it can moisten the subgrade soil, altering its physical properties, particularly affecting cohesive and loose soils. This water infiltration can cause soil expansion or compaction, leading to localized settlement or even uneven settlement of the entire subgrade. This settlement can cause pavement deformation, cracks, and in severe cases, pavement damage.

[0004] Existing roadbed structures with asphalt pavement typically have a drainage layer made of permeable materials (such as crushed stone, gravel, permeable concrete, etc.) between the pavement and the roadbed to ensure that water can flow out through the drainage layer and prevent water from stagnating on the pavement for a long time. However, water can still seep into the roadbed and cause erosion. It is impossible to achieve pavement drainage while simultaneously preventing water from seeping into the roadbed. Utility Model Content

[0005] This utility model provides a roadbed structure for asphalt pavement, which solves the problem mentioned in the background art that water can still seep into the roadbed and cause erosion, making it impossible to achieve pavement drainage while simultaneously preventing water from seeping into the roadbed.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a roadbed structure for asphalt pavement, comprising a subbase, a cushion layer, an asphalt pavement, and a drainage mechanism. A cushion layer is disposed above the subbase, and an asphalt pavement is disposed above the cushion layer. A waterproof layer is disposed between the cushion layer and the asphalt pavement. The drainage mechanism is embedded in the cushion layer and includes a water collection hopper and a fixing component. The water collection hopper is disposed in the cushion layer, and a pipe seat is fixedly connected to the lower end of the water collection hopper. A frame is fixedly connected to both ends of the pipe seat, and a water outlet pipe is fixedly connected to one side of the pipe seat. A valve is disposed inside the water outlet pipe. The fixing component is disposed inside the frame and includes a support plate, a fixing cylinder, and a U-shaped nail. The support plate is disposed inside the frame, and a fixing cylinder is fixedly connected to both ends of the support plate. The short end of the U-shaped nail is inserted into the fixing cylinder, and the long end of the U-shaped nail is inserted into the subbase.

[0007] Preferably, a cavity is formed through the end face of the fixed cylinder, a bottom cavity is provided at the lower end of the cavity, the inner side of the bottom cavity is inclined, and a plurality of inner rings are arranged along the length of the cavity on the inner wall of the cavity.

[0008] Preferably, the short end of the U-shaped nail has multiple outer rings arranged along the length of the vertical rod, and a connecting part is fixedly connected to the short end of the U-shaped nail. The connecting part is fixed in the bottom cavity, and a nail head is fixedly connected to one end of the connecting part. The nail head is inserted into the bottom base layer.

[0009] Preferably, the water collection hopper is located below the asphalt pavement, and the upper opening of the water collection hopper is flush with the upper surface of the subbase.

[0010] Preferably, the water collection hopper has multiple strips fixedly connected inside, and a seepage gap is left between two adjacent strips.

[0011] Preferably, the asphalt pavement extends downward into the interior of the water collection hopper located above the strip.

[0012] Preferably, the valve includes a valve cylinder and a valve plate. The valve cylinder is fixed inside the water outlet pipe. An inner plate is fixedly connected inside the valve cylinder. A hole is opened in the inner plate. A sliding rod is fixedly connected to one side of the valve plate. The sliding rod is slidably connected to the inner plate through the hole in the inner plate. A limit ring is fixedly connected to the outer side of the sliding rod.

[0013] Preferably, a slide bar is fixedly connected to the inner side of the frame, and a slide groove is formed through the side of the support plate, so that the support plate and the slide bar are slidably connected through the slide groove.

[0014] Preferably, both sides of the water collection hopper are fixedly connected with side ears, and multiple drainage mechanisms are arranged along the length of the asphalt pavement. Adjacent water collection hoppers are fixed by inserting fixing bolts into the side ears between them.

[0015] Preferably, the end face of the water outlet pipe opening is a slope, and the opening of the water outlet pipe protrudes out of the padding layer.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. When installing the drainage mechanism, place it on the base layer and insert the short end of the U-shaped nail into the fixing cylinder. Tap the U-shaped nail so that the outer ring of the U-shaped nail is below the inner ring in the fixing cylinder, preventing the U-shaped nail from detaching from the fixing cylinder. After the connecting part enters the bottom cavity, continue tapping the U-shaped nail to make the connecting part move further down. By making the connecting part and the bottom cavity interference fit, it is more difficult for the U-shaped nail to detach from the fixing cylinder. At the same time, both the nail head of the short end of the U-shaped nail and the long end of the U-shaped nail are inserted into the base layer, thus stabilizing and fixing the drainage mechanism.

[0018] 2. Lay a subbase layer on the base course until it covers the drainage mechanism, making the upper surface of the subbase layer flush with the upper surface of the water collection hopper. Lay a waterproof layer on the subbase layer, and then continue to lay the asphalt pavement on top of the waterproof layer. When laying the asphalt, the asphalt enters the water collection hopper from above and spreads across the slabs. When water seeps into the subsequent asphalt pavement, it cannot pass through the waterproof layer and will collect in the water collection hopper. It will then flow into the bottom of the water collection hopper through the seepage gaps between the slabs and be discharged outwards through the outlet pipe. This prevents water from stagnating in the asphalt pavement for a long time and avoids accelerated aging of the asphalt material due to water retention. At the same time, the water is discharged through the drainage mechanism and cannot enter the roadbed, so that the roadbed will not be eroded by water. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the subgrade structure of the asphalt pavement according to this utility model;

[0020] Figure 2 This is a schematic diagram of the drainage mechanism of this utility model;

[0021] Figure 3 This is a cross-sectional view of the water collection hopper of this utility model;

[0022] Figure 4 This is a cross-sectional view of the valve cylinder and valve plate of this utility model in action;

[0023] Figure 5 This is a schematic diagram of the fixing component structure of this utility model;

[0024] Figure 6 for Figure 5 Enlarged view of point A;

[0025] Figure 7 This is an internal sectional view of the fixed cylinder of this utility model;

[0026] Figure 8 This is a schematic diagram of the interconnected structure of the water collection hoppers of this utility model.

[0027] Numbered in the diagram: 1. Subbase; 2. Subbase; 21. Waterproof layer; 3. Asphalt pavement; 4. Drainage mechanism; 41. Water collection hopper; 411. Pipe seat; 4111. Frame; 4112. Sliding strip; 4113. Water outlet pipe; 412. Strip plate; 4121. Water seepage joint; 413. Side lug; 42. Fixing component; 421. Support plate; 4211. Slide groove; 422. Fixing cylinder; 4221. Cylinder cavity; 4222. Bottom cavity; 4223. Inner ring; 423. U-shaped nail; 4231. Connecting part; 4232. Nail head; 4233. Outer ring; 43. Valve; 431. Valve cylinder; 4311. Inner plate; 432. Valve plate; 4321. Sliding rod; 4322. Limiting ring; 5. Fixing bolt. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] This utility model provides a roadbed structure for asphalt pavement, such as... Figure 1 and Figure 2As shown, the road includes a subbase 1, a subbase 2, an asphalt pavement 3, and a drainage mechanism 4. The subbase 2 is placed on top of the subbase 1. The subbase 2 is paved with materials such as sand, gravel, granular material, or a mixture of sand and gravel, which can increase the bearing capacity of the roadbed. The asphalt pavement 3 is placed on top of the subbase 2. A waterproof layer 21 is placed between the subbase 2 and the asphalt pavement 3. The drainage mechanism 4 is embedded in the subbase 2. The drainage mechanism 4 includes a water collection hopper 41 and a fixing component 42. The water collection hopper 41 is located in the subbase 2, below the asphalt pavement 3, and its upper end is open. The inlet is flush with the upper surface of the subbase 2. No waterproof layer 21 is installed above the water collection hopper 41. Multiple strips 412 are fixedly connected inside the water collection hopper 41, with seepage joints 4121 between adjacent strips 412. The asphalt pavement 3 extends downwards into the interior of the water collection hopper 41 above the strips 412. The width of the seepage joints 4121 is less than 5mm. When asphalt is laid, it enters the water collection hopper 41 from above and spreads across the strips 412. Although the asphalt has a high temperature and strong fluidity, it still possesses a certain degree of adhesion and cohesion. When the gap is less than 5mm, the asphalt will be bound in these small gaps due to its high viscosity, making it difficult to flow out.

[0030] like Figure 2 As shown, a pipe seat 411 is fixedly connected to the lower end of the water collection hopper 41. A frame 4111 is fixedly connected to both ends of the pipe seat 411. A water outlet pipe 4113 is fixedly connected to one side of the pipe seat 411. The water outlet pipe 4113 is connected to the pipe seat 411. The end face of the opening of the water outlet pipe 4113 is inclined, with the opening facing downwards. This prevents water flowing down the slopes on both sides of the cushion layer 2 from entering the water outlet pipe 4113. The opening of the water outlet pipe 4113 protrudes beyond the cushion layer 2. Figure 3 As shown, the outlet pipe 4113 is equipped with a valve 43 inside, such as Figure 4 As shown, valve component 43 includes valve cylinder 431 and valve plate 432. Valve cylinder 431 is fixed inside the outlet pipe 4113. An inner plate 4311 is fixedly connected inside valve cylinder 431, and holes are opened on the inner plate 4311. A sliding rod 4321 is fixedly connected to one side of valve plate 432. The sliding rod 4321 is slidably connected to the inner plate 4311 through the holes in the inner plate 4311. A limit ring 4322 is fixedly connected to the outer side of the sliding rod 4321. The water seeping down from the asphalt pavement 3 is collected into the water collection hopper 41 and flows into the bottom of the water collection hopper 41 through the seepage gaps 4121 between the strips 412. It is then discharged outward from the pipe seat 411 through the outlet pipe 4113.

[0031] When water is discharged from the outlet pipe 4113, it passes through the valve 43 and impacts the valve plate 432, causing the slide rod 4321 to slide in the inner plate 4311. The valve plate 432 separates from the inner plate 4311, which will leak the holes in the inner plate 4311 that were originally sealed by the valve plate 432. Water flows out from the holes. Due to the setting of the limit ring 4322, the slide rod 4321 cannot be disengaged from the inner plate 4311. When external water flows back into the outlet pipe 4113, the water flow will put pressure on the valve plate 432, making it stick tightly to the inner plate 4311 and sealing the holes in the inner plate 4311 to prevent water from flowing back into the outlet pipe 4113.

[0032] like Figure 2 As shown, the fixing component 42 is disposed inside the frame 4111, as... Figure 5 As shown, the fixing component 42 includes a support plate 421, a fixing cylinder 422, and a U-shaped nail 423. The support plate 421 is disposed inside the frame 4111, and fixing cylinders 422 are fixedly connected to both ends of the support plate 421. The short end of the U-shaped nail 423 is inserted into the fixing cylinder 422, and the long end of the U-shaped nail 423 is inserted into the base layer 1. Figure 6 and Figure 7 As shown, a cavity 4221 is formed through the end face of the fixed cylinder 422. A bottom cavity 4222 is provided at the lower end of the cavity 4221. The inner side of the bottom cavity 4222 is inclined. Multiple inner rings 4223 are arranged along the length of the cavity 4221 on the inner wall of the cavity 4221. Multiple outer rings 4233 are arranged along the length of the vertical rod at the short end of the U-shaped nail 423. A connecting part 4231 is fixedly connected to the short end of the U-shaped nail 423. The connecting part 4231 is fixed in the bottom cavity 4222. A nail head 4232 is fixedly connected to one end of the connecting part 4231. The nail head 4232 is inserted into the base layer 1. When installing the drainage mechanism 4, place the drainage mechanism 4 on the base layer 1, insert the short end of the U-shaped nail 423 into the fixing cylinder 422, and tap the U-shaped nail 423 so that the outer ring 4233 on the U-shaped nail 423 is below the inner ring 4223 in the fixing cylinder 422, preventing the U-shaped nail 423 from detaching from the fixing cylinder 422. Both sides of the connecting part 4231 are beveled and correspond to the inner side of the bottom cavity 4222. After the connecting part 4231 enters the bottom cavity 4222... Continue to strike the U-shaped nail 423, causing the connecting part 4231 to continue to move downward. Since the upper end of the connecting part 4231 is wider than the lower end, the connecting part 4231 will exert external support and pressure on the inner wall of the bottom cavity 4222. By making the connecting part 4231 and the bottom cavity 4222 interference fit, it is more difficult for the U-shaped nail 423 to detach from the fixing cylinder 422. At the same time, the nail head 4232 at the short end of the U-shaped nail 423 and the long end of the U-shaped nail 423 are both inserted into the bottom base layer 1, and the drainage mechanism 4 is stably fixed.

[0033] like Figure 8As shown, a sliding strip 4112 is fixedly connected to the inner side of the frame 4111, and a sliding groove 4211 is opened through the side of the support plate 421. The support plate 421 is slidably connected to the sliding strip 4112 through the sliding groove 4211. Side ears 413 are fixedly connected to both sides of the water collection hopper 41. Multiple drainage mechanisms 4 are arranged along the length of the asphalt pavement 3. Adjacent water collection hoppers 41 are fixed by inserting fixing bolts 5 into the side ears 413 between them. By increasing the number of drainage mechanisms 4, the drainage mechanisms 4 can be laid all over the pavement. In order to further enhance the subgrade's ability to prevent settlement, a geogrid can be laid on the subbase 1. The drainage mechanism 4 is located above the geogrid. By sliding the support plate 421, the position of the fixing cylinder 422 can be adjusted so that the U-shaped nail 423 can pass through the opening of the geogrid and be inserted into the subbase 1. The geogrid is fixed at the same time as the drainage mechanism 4.

[0034] Using this utility model, such as Figure 1 and Figure 2 As shown, when installing the drainage mechanism 4, the drainage mechanism 4 is placed on the base layer 1. The short end of the U-shaped nail 423 is inserted into the fixing cylinder 422, and the U-shaped nail 423 is tapped so that the outer ring 4233 on the U-shaped nail 423 is below the inner ring 4223 in the fixing cylinder 422, preventing the U-shaped nail 423 from detaching from the fixing cylinder 422. After the connecting part 4231 enters the bottom cavity 4222, the U-shaped nail 423 is continued to be tapped, causing the connecting part 4231 to continue to move downward. By making the connecting part 4231 and the bottom cavity 4222 interference fit, it is more difficult for the U-shaped nail 423 to detach from the fixing cylinder 422. At the same time, the nail head 4232 at the short end of the U-shaped nail 423 and the long end of the U-shaped nail 423 are both inserted into the base layer 1, stabilizing and fixing the drainage mechanism 4. A pad layer 2 is laid on the base layer 1. The drainage mechanism 4 is covered so that the upper surface of the subbase 2 is flush with the upper surface of the water collection hopper 41. A waterproof layer 21 is laid on the subbase 2, and then asphalt pavement 3 is laid on top of the waterproof layer 21. When laying asphalt, the asphalt enters the water collection hopper 41 from above and covers the strip 412. When water seeps into the subsequent asphalt pavement 3, the water cannot pass through the waterproof layer 21 and will collect into the water collection hopper 41. It will then flow into the bottom of the water collection hopper 41 through the seepage gap 4121 between the strip 412 and be discharged outward from the pipe seat 411 through the outlet pipe 4113. This can prevent water from stagnating in the asphalt pavement 3 for a long time and avoid the accelerated aging of the asphalt material due to water retention. At the same time, the water is discharged through the drainage mechanism 4 and cannot enter the roadbed, so that the roadbed will not be eroded by water.

[0035] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A roadbed structure for asphalt pavement, characterized in that, The system includes a subbase (1), a subbase (2), an asphalt pavement (3), and a drainage mechanism (4). The subbase (1) is provided above the subbase (1), and the asphalt pavement (3) is provided above the subbase (2). A waterproof layer (21) is provided between the subbase (2) and the asphalt pavement (3). The drainage mechanism (4) is embedded in the subbase (2). The drainage mechanism (4) includes a water collection hopper (41) and a fixing component (42). The water collection hopper (41) is provided in the subbase (2). A pipe seat (411) is fixedly connected to the lower end of the water collection hopper (41). A frame (4111) is fixedly connected to both ends of the pipe seat (4111). A water outlet pipe (4113) is fixedly connected to one side of the pipe seat (4111). A valve (43) is provided inside the water outlet pipe (4113). The fixing component (42) is located inside the frame (4111). The fixing component (42) includes a support plate (421), a fixing cylinder (422), and a U-shaped nail (423). The support plate (421) is located inside the frame (4111). Both ends of the support plate (421) are fixedly connected to the fixing cylinder (422). The short end of the U-shaped nail (423) is inserted into the fixing cylinder (422), and the long end of the U-shaped nail (423) is inserted into the base layer (1).

2. The subgrade structure of an asphalt pavement according to claim 1, characterized in that, A cavity (4221) is provided through the end face of the fixed cylinder (422), and a bottom cavity (4222) is provided at the lower end of the cavity (4221). The inner side of the bottom cavity (4222) is inclined, and multiple inner rings (4223) are arranged along the length of the cavity (4221) on the inner wall of the cavity (4221).

3. The subgrade structure of an asphalt pavement according to claim 2, characterized in that, The short end of the U-shaped nail (423) has multiple outer rings (4233) arranged along the length of the vertical rod. A connecting part (4231) is fixedly connected to the short end of the U-shaped nail (423). The connecting part (4231) is fixed in the bottom cavity (4222). A nail head (4232) is fixedly connected to one end of the connecting part (4231). The nail head (4232) is inserted into the bottom base layer (1).

4. The subgrade structure of an asphalt pavement according to claim 1, characterized in that, The water collection hopper (41) is located below the asphalt pavement (3), and the upper opening of the water collection hopper (41) is flush with the upper surface of the subbase (2).

5. The subgrade structure of an asphalt pavement according to claim 1, characterized in that, The water collection hopper (41) has multiple strips (412) fixedly connected inside, and a seepage gap (4121) is left between two adjacent strips (412).

6. The subgrade structure of an asphalt pavement according to claim 5, characterized in that, The asphalt pavement (3) extends downward into the interior of the water collection hopper (41) located above the strip (412).

7. The subgrade structure of an asphalt pavement according to claim 1, characterized in that, The valve component (43) includes a valve cylinder (431) and a valve plate (432). The valve cylinder (431) is fixed inside the water outlet pipe (4113). An inner plate (4311) is fixedly connected inside the valve cylinder (431). A hole is provided on the inner plate (4311). A slide rod (4321) is fixedly connected to one side of the valve plate (432). The slide rod (4321) is slidably connected to the inner plate (4311) through the hole in the inner plate (4311). A limit ring (4322) is fixedly connected to the outer side of the slide rod (4321).

8. The subgrade structure of an asphalt pavement according to claim 1, characterized in that, The inner side of the frame (4111) is fixedly connected to a slide bar (4112), and the side of the support plate (421) is provided with a sliding groove (4211). The support plate (421) is slidably connected to the slide bar (4112) through the sliding groove (4211).

9. The subgrade structure of an asphalt pavement according to claim 1, characterized in that, Both sides of the water collection bucket (41) are fixedly connected with side ears (413), and multiple drainage mechanisms (4) are arranged along the length of the asphalt pavement (3). Two adjacent water collection buckets (41) are fixed by inserting fixing bolts (5) into the side ears (413) between them.

10. The subgrade structure of an asphalt pavement according to claim 1, characterized in that, The end face of the opening of the water outlet pipe (4113) is inclined, and the opening of the water outlet pipe (4113) protrudes out of the pad layer (2).

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