Novel asphalt pavement structure

Abstract

The utility model belongs to the technical field of asphalt pavements, and particularly relates to a novel asphalt pavement structure. Comprising a cushion layer, a gravel layer is arranged on the cushion layer, a drainage pipe used for drainage is arranged in the gravel layer, a through groove is formed in the side wall of the drainage pipe, a filter screen is arranged at the through groove, a reinforcing layer is arranged on the upper surface of the gravel layer, an asphalt anti-cracking patch is arranged on the upper surface of the reinforcing layer, and asphalt concrete is arranged on the upper surface of the asphalt anti-cracking patch. The gravel layer is laid on the cushion layer, then the reinforcing layer is laid on the gravel layer, the strength of the roadbed is enhanced, then the asphalt anti-cracking paste is laid between the reinforcing layer and the asphalt concrete, the waterproof performance of the roadbed is improved, the drainage pipe embedded in the gravel layer facilitates drainage of permeated water, and the drainage effect of the roadbed is enhanced as much as possible; and the supporting stability of the cushion layer is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt pavement, and particularly relates to a new type of asphalt pavement structure. Background Technique

[0002] With the rapid development of the global economy and the acceleration of the urbanization process, the traffic flow on roads is increasing continuously, and the performance requirements for highway subgrades are also getting higher and higher. As a widely used type of subgrade, the design and construction of the cushion structure of the asphalt subgrade are crucial for ensuring the flatness, bearing capacity, and service life of the subgrade. The traditional cushion structure of the asphalt subgrade usually uses natural materials such as gravel and crushed stone. Although it can meet the basic traffic needs to a certain extent, its performance is often unsatisfactory under complex traffic and climate conditions such as heavy loads, high speeds, high temperatures, and heavy rains. Specifically, these materials are easily affected by moisture and temperature, resulting in problems such as cracking, settlement, and rutting of the subgrade, seriously affecting driving safety and the service life of the road.

[0003] Usually, the position where vehicles pass above the cushion structure is concentrated in one area, and the rolling frequency of other areas by vehicles is relatively small. As a result, a strong sinking stress is easily generated in the area where vehicles pass and roll too much, which easily causes a slight bulging state to form between other areas and the area where vehicles pass and roll too much, resulting in the problem that the cushion cannot evenly share the rolling pressure of passing vehicles, affecting the flatness of the new asphalt subgrade. Moreover, when the upper new asphalt subgrade is damaged and the cushion is exposed, too much moisture easily flows into an internal area from the cushion. Subsequently, after repair, the moisture remains in the cushion, so that in hot weather, the area is easily affected by moisture and expands when heated, and even causes subgrade settlement, thus aggravating the formation of cracks and affecting the support effect of the cushion structure. Content of the Utility Model

[0004] According to the above deficiencies in the prior art, the technical problem to be solved by the utility model is: to provide a new type of asphalt pavement structure, which can enhance the drainage effect of the subgrade as much as possible and ensure the stability of the cushion support.

[0005] The new type of asphalt subgrade structure includes a cushion. A gravel layer is arranged on the cushion. A drain pipe for drainage is arranged in the gravel layer. Through grooves are formed in the side wall of the drain pipe, and filter nets are arranged at the through grooves. A reinforcement layer is arranged on the upper surface of the gravel layer. An asphalt anti-cracking sticker is arranged on the upper surface of the reinforcement layer. An asphalt concrete is arranged on the upper surface of the asphalt anti-cracking sticker.

[0006] Furthermore, the reinforcement layer includes a first concrete layer and a second concrete layer laid in sequence from bottom to top, and a fiberglass grid is arranged between the first concrete layer and the second concrete layer.

[0007] Furthermore, a waterproof layer is arranged on the upper surface of the cushion.

[0008] Furthermore, a number of reinforcing rings are sleeved on the drain pipe.

[0009] Furthermore, a number of reinforcing ribs are arranged between two adjacent reinforcing rings.

[0010] Furthermore, the drain pipe is made of high-strength carbon steel material.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] In the utility model, a gravel layer is laid on the cushion layer, and then the reinforcement layer is laid on the gravel layer to enhance the strength of the roadbed. Then, the asphalt crack prevention sticker is laid between the reinforcement layer and the asphalt concrete to improve the waterproof performance of the roadbed. The drain pipe buried in the gravel layer facilitates the drainage of the infiltrated water, as much as possible enhancing the drainage effect of the roadbed and ensuring the stability of the support of the cushion layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the utility model;

[0014] Figure 2 is Figure 1 the schematic structural diagram of the drain pipe in

[0015] The names of each component in the figure: 1. Cushion layer 2. Waterproof layer 3. Gravel layer 4. Reinforcement layer 4.1. First concrete layer 4.2. Fiberglass grid 4.3. Second concrete layer 5. Asphalt crack prevention sticker 6. Asphalt concrete 7. Drain pipe 8. Reinforcing ring 9. Filter net 10. Reinforcing rib. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following further illustrates the utility model through specific embodiments with reference to the drawings, but it is not used to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the present invention.

[0017] Embodiment

[0018] A new type of asphalt roadbed structure described in this embodiment, as shown in Figure 1 and Figure 2As shown, it includes a cushion layer 1, on which a crushed stone layer 3 is arranged, in which a drainage pipe 7 for drainage is arranged, a through groove is opened on the side wall of the drainage pipe 7, and a filter screen 9 is arranged at the through groove, and a reinforcement layer 4 is arranged on the upper surface of the crushed stone layer 3, and an asphalt anti-cracking sticker 5 is arranged on the upper surface of the reinforcement layer 4, and an asphalt concrete 6 is arranged on the upper surface of the asphalt anti-cracking sticker 5; the cushion layer 1 adopts solidified engineering slag and recycled aggregate crushed stone, which can not only solve the reuse of construction waste, but also improve the compressive strength of the cushion layer 1; a crushed stone layer 3 is laid on the cushion layer 1, and the crushed stone layer 3 adopts cement crushed stone. When the crushed stone layer 3 is laid on the cushion layer 1, the load bearing capacity of the roadbed can be further improved, and the crushed stone layer 3 can diffuse load stress and store water and drain water, etc. 3 bears the vertical force of the vehicle load on the roadbed, and minimizes the adverse effects of uneven frost heave or settlement deformation of the roadbed on the cushion layer 1; and during the laying process of the gravel layer 3, a drainage pipe 7 is buried in the inner layer of the gravel layer 3, and the drainage pipes 7 are buried on both sides of the gravel layer 3 to avoid the concentrated rolling area of ​​vehicles. The corresponding surfaces of the two drainage pipes 7 are opened with through grooves. The two drainage pipes 7 are located on both sides of the roadbed, and the through grooves of the drainage pipes 7 face the concentrated rolling area of ​​vehicles in the center of the roadbed. A filter screen 9 for filtering sand and gravel is glued or glued to the through groove, and the accumulated water that penetrates into the gravel layer 3 is convenient to flow into the drainage pipe 7 through the filter screen 9, and is discharged through the drainage pipe 7, so as to avoid the accumulation of water in the gravel layer 3, which affects the subsequent repair of the roadbed or causes the settlement of the roadbed;

[0019] A reinforcement layer 4 is laid on the upper surface of the crushed stone layer 3, an asphalt anti-cracking sticker 5 is laid on the upper surface of the reinforcement layer 4, and asphalt concrete 6 is laid on the upper surface of the asphalt anti-cracking sticker 5, so that a waterproof and anti-seepage layer is formed between the asphalt concrete 6 and the reinforcement layer 4, which effectively prevents moisture from entering the reinforcement layer 4 through cracks and can also make the reinforcement layer 4 more stable. After laying the asphalt anti-cracking sticker 5, the cracked reinforcement layer 4 can be isolated from the asphalt concrete 6, thereby reducing the possibility of the tensile stress of the cracks in the reinforcement layer 4 being directly transmitted to the asphalt concrete 6, which helps to prevent the relative displacement of the upper and lower layers of the interface and maintain the continuity of the roadbed;

[0020] like Figure 1As shown in the figure, the reinforcement layer 4 includes a first concrete layer 4.1 and a second concrete layer 4.3 laid in sequence from bottom to top. A fiberglass grid 4.2 is provided between the first concrete layer 4.1 and the second concrete layer 4.3. During actual construction, the first concrete layer 4.1 is poured on the gravel layer 3, and then the fiberglass grid 4.2 is placed. The fiberglass grid 4.2 has a high tensile strength and tensile modulus, which can effectively improve the bearing capacity of the roadbed, prevent problems such as cracks and deformations in the roadbed, extend the service life of the roadbed. The voids of the fiberglass grid 4.2 can play a drainage role, effectively improving the drainage performance of the roadbed, avoiding water accumulation in the roadbed, and protecting the structural layer of the roadbed from damage. The fiberglass grid 4.2 is made of glass fiber and will not cause pollution to the environment. At the same time, it also has good corrosion resistance and aging resistance, which can ensure the stability of the roadbed during long-term use; then the second concrete layer 4.3 is poured on the fiberglass grid 4.2, enhancing the connectivity, integrity, and firmness between the multi-layer structures;

[0021] As Figure 1 shown in the figure, a waterproof layer 2 is provided on the upper surface of the cushion layer 1. The waterproof layer 2 is laid on the upper surface of the cushion layer 1, and then the gravel layer 3 is laid on the waterproof layer 2. The waterproof layer 2 between the gravel layer 3 and the cushion layer 1 plays an important role in ensuring the dry state of the roadbed, preventing water damage, enhancing the stability of the roadbed, extending the service life, and promoting drainage;

[0022] As Figure 1 and Figure 2 shown in the figure, a number of reinforcement rings 8 are sleeved on the drain pipe 7. The reinforcement rings 8 are adhered or welded to the drain pipe 7. A number of reinforcing ribs 10 are provided between adjacent two reinforcement rings 8. The reinforcing ribs 10 are welded or adhered to the adjacent two reinforcement rings 8. The strength of the drain pipe 7 can be increased through the reinforcement rings 8 and the reinforcing ribs 10. The displacement of the drain pipe 7 in the gravel layer 3 can be avoided as much as possible through the reinforcement rings 8, ensuring the drainage effect of the drain pipe 7; the drain pipe 7 is made of high-strength carbon steel material. The drain pipe 7 made of high-strength carbon steel material has characteristics such as high strength, durability, corrosion resistance, economy, and environmental protection, and can withstand large pressures and loads, which reduces the cost and time cost caused by frequent replacement of the drain pipe 7 and is beneficial to maintaining the stability of the overall roadbed.

[0023] In actual use, a cushion layer 1 is laid on the roadbed, and a crushed stone layer 3 is laid on the cushion layer 1. The cushion layer 1 and the crushed stone layer 3 can improve the compressive strength of the roadbed structure and ensure the stability of the roadbed. Then a drainage pipe 7 is buried in the crushed stone layer 3, and the water that penetrates into the crushed stone layer 3 is discharged through a filter net 9 arranged on the drainage pipe 7 to prevent residual moisture from affecting the stability of the crushed stone layer 3 and the cushion layer 1. A reinforcement layer 4 is laid on the surface of the crushed stone layer 3 to further improve the strength of the roadbed and enhance the load-bearing capacity. An asphalt anti-cracking sticker 5 is laid on the upper surface of the reinforcement layer 4, and asphalt concrete 6 is laid on the upper surface of the asphalt anti-cracking sticker 5 to further enhance the waterproof performance of the roadbed and avoid cracks and settlement in the roadbed as much as possible.

Claims

1. A novel asphalt pavement structure, comprising a cushion layer (1), characterized in that: A crushed stone layer (3) is arranged on the cushion layer (1), a drainage pipe (7) for drainage is arranged in the crushed stone layer (3), a through groove is opened on the side wall of the drainage pipe (7), a filter screen (9) is arranged at the through groove, a reinforcement layer (4) is arranged on the upper surface of the crushed stone layer (3), an asphalt anti-cracking sticker (5) is arranged on the upper surface of the reinforcement layer (4), and asphalt concrete (6) is arranged on the upper surface of the asphalt anti-cracking sticker (5).

2. The novel asphalt pavement structure according to claim 1 is characterized in that: The reinforcement layer (4) comprises a first concrete layer (4.1) and a second concrete layer (4.3) which are laid sequentially from bottom to top, and a glass fiber grid (4.2) is arranged between the first concrete layer (4.1) and the second concrete layer (4.3).

3. The novel asphalt pavement structure according to claim 1 is characterized in that: A waterproof layer (2) is provided on the upper surface of the cushion layer (1).

4. The novel asphalt pavement structure according to claim 1 is characterized in that: The drainage pipe (7) is sleeved with a plurality of reinforcement rings (8).

5. The novel asphalt pavement structure according to claim 4 is characterized in that: A plurality of reinforcing ribs (10) are arranged between two adjacent reinforcing rings (8).

6. The novel asphalt pavement structure according to claim 1 is characterized by: The drainage pipe (7) is made of high-strength carbon steel material.

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