Long-life asphalt pavement structure

Abstract

The present invention discloses a long-life asphalt pavement structure, comprising pavement modules, which are laid sequentially from the centerline of the road toward the shoulders on both sides. Each pavement module is provided with a permeable pavement layer, a concrete asphalt layer, and two-level water seepage layers in order from top to bottom; a shoulder module is provided at the shoulder and connected to the pavement module; the shoulder module includes a water seepage unit and a water storage unit, wherein the water seepage unit is provided with a permeable pavement layer, a concrete layer, and three-level water seepage layers in order from top to bottom; the water storage unit is a water storage cavity provided outside the shoulder and a drainage device for draining the water storage cavity; wherein, each level of water seepage layers of adjacent pavement modules is provided with opposing drainage holes, the two-level water seepage layers at the bottom of the shoulder module are flush with the two-level water seepage layers of the pavement module, and opposing drainage holes are provided between each level of adjacent water seepage layers. The present invention can both extend the service life of the asphalt pavement structure and improve the water permeability of the asphalt pavement structure.

Description

Technical Field

[0001] The present invention relates to the field of asphalt pavement engineering, and more particularly to a long-life asphalt pavement paving structure. Background Art

[0002] Asphalt pavements typically have a semi-rigid base. While they offer a high overall bearing capacity, they generally suffer from two problems. First, semi-rigid base asphalt pavements suffer from prominent reflective cracking, resulting in a short design life and high maintenance costs. As described in the background art of the utility model patent, CN219045073U, entitled "A Long-Life Asphalt Pavement Structure with an AC-5 Anti-Fatigue Layer," the fatigue life of asphalt pavements is relatively short. Second, with increasing natural precipitation, higher requirements are placed on the permeability of pavement structures. Existing asphalt pavement structures have poor permeability and are unsuitable for climate change with heavy rainfall. While the aforementioned utility model incorporates an AC-5 asphalt concrete anti-fatigue layer between the graded crushed stone layer and the EME-20 asphalt concrete subbase, leveraging the inherent bonding strength of the AC-5 asphalt concrete anti-fatigue layer to form a good bond with the underlying graded crushed stone layer, thereby improving the overall road performance of the asphalt pavement structure. Furthermore, the excellent flexibility of the AC-5 asphalt concrete enhances the fatigue resistance of the asphalt pavement structure, extending the service life of the asphalt pavement. However, the improvement in the permeability of the asphalt pavement structure is minimal. Summary of the Invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] Another object of the present invention is to provide a long-life asphalt pavement paving structure, which can not only extend the service life of the asphalt pavement paving structure, but also improve the water permeability of the asphalt pavement paving structure.

[0005] In order to achieve these objects and other advantages according to the present invention, there is provided a long-life asphalt pavement structure comprising:

[0006] Pavement modules are laid on the roadbed. Multiple pavement modules are laid from the center line of the road to the shoulders on both sides. Each pavement module is equipped with a permeable pavement layer, a concrete asphalt layer and two-level water seepage layers from top to bottom.

[0007] A shoulder module is laid above the roadbed, is laid on the shoulder and is connected to the pavement module; the shoulder module includes a water seepage unit and a water storage unit, the water seepage unit is arranged near the pavement module, and is provided with a permeable pavement layer, a concrete layer, and three-level water seepage layers from top to bottom; the water storage unit is a water storage cavity arranged outside the shoulder and a drainage device for draining the water storage cavity;

[0008] Among them, relative drainage holes are provided between each level of seepage layers of adjacent pavement modules, the two levels of seepage layers at the bottom of the shoulder module are flush with the two levels of seepage layers of the pavement module, and relative drainage holes are provided between each adjacent level of seepage layers, and a drainage hole connected to the water storage cavity is provided on the other side of the third level of seepage layer of the seepage unit of the shoulder module.

[0009] Preferably, each of the two-level water seepage layer of the pavement module and the three-level water seepage layer of the water seepage unit includes a water seepage space and a concrete support layer arranged from top to bottom.

[0010] Preferably, a plurality of V-shaped support frames are provided in the water seepage space.

[0011] Preferably, seepage holes are provided on the concrete asphalt layer of the pavement module, the concrete support layer of the pavement module except the bottom concrete support layer, the concrete layer of the shoulder module and the concrete support layer of the shoulder module except the bottom concrete support layer.

[0012] Preferably, a water seepage column is provided in the water seepage hole, and the water seepage column comprises a concrete outer ring, cross steel plates arranged in the concrete along the radial direction of the concrete outer ring, and polyester fibers bonded between the cross steel plates.

[0013] Preferably, the permeable pavement layer is a mixture of epoxy resin and asphalt, wherein the weight ratio of epoxy resin to asphalt is 1:50-80.

[0014] Preferably, the concrete asphalt layer is a mixture of C40-C50 concrete and asphalt, wherein the weight ratio of C40-C50 concrete to asphalt is 1:10-20.

[0015] Preferably, the two concrete support layers in the pavement module are C40-C45 concrete and C50-C60 concrete respectively, and the arrangement density of the seepage columns in the concrete asphalt layer is not greater than the arrangement density of the seepage columns in the concrete support layer.

[0016] Preferably, the concrete layer in the shoulder module is C40-C50 concrete, and the three concrete support layers are C40-C45 concrete, C50-C60 concrete and C60-C80 concrete respectively. As the depth of the concrete layer and the concrete support layer increases, the arrangement density of the seepage columns decreases.

[0017] The present invention includes at least the following beneficial effects: the long-life asphalt pavement paving structure disclosed in the present invention is provided with an assembled pavement module and a shoulder module, wherein the pavement module is arranged in an area with a large traffic volume on the pavement, and is laid in sequence from the center line of the pavement to the shoulder, and its design focuses on compressive strength and durability, and the shoulder module is arranged at the shoulder, making full use of the characteristic that the roadbed decreases in height along the center line to both sides, and plays a role in connecting with the pavement module and storing and draining water, and its design focuses on permeability and drainage; the pavement module includes a permeable pavement layer, a concrete asphalt layer and a two-level seepage layer arranged from top to bottom, wherein the thickness of the concrete asphalt layer is not less than half of the total thickness of the two-level seepage layer to ensure the overall bearing capacity of the asphalt pavement paving structure; the shoulder module includes a seepage unit and a water storage unit, and the seepage unit is provided with a permeable pavement layer, concrete and a three-level seepage layer in sequence from top to bottom, and is designed with more seepage cavities to receive water seeped by the pavement module to ensure the water storage and drainage capacity of the asphalt pavement paving structure.

[0018] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the pavement module in one technical solution of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the road shoulder module in another technical solution of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0022] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0023] like Figure 1 、 2 As shown, the present invention provides a long-life asphalt pavement structure, comprising:

[0024] Pavement modules are laid on the roadbed. Multiple pavement modules are laid from the center line of the road to the shoulders on both sides. Each pavement module is provided with a permeable pavement layer 1, a concrete asphalt layer 2 and two-level water seepage layers from top to bottom.

[0025] The shoulder module is laid above the roadbed and is laid on the shoulder and connected to the pavement module. The shoulder module includes a water seepage unit and a water storage unit 8. The water seepage unit is located near the pavement module and is provided with a permeable pavement layer 1, a concrete layer 11, and three water seepage layers from top to bottom. The water storage unit is a water storage cavity provided outside the shoulder and a drainage device for draining the water storage cavity.

[0026] Among them, relative drainage holes 4 are provided between each level of seepage layers of adjacent pavement modules, the two levels of seepage layers at the bottom of the shoulder module are flush with the two levels of seepage layers of the pavement module, and relative drainage holes 4 are provided between each adjacent level of seepage layers, and a drainage hole connected to the water storage cavity is provided on the other side of the three-level seepage layer of the seepage unit of the shoulder module.

[0027] In the above technical features, the long-life asphalt pavement pavement structure includes a pavement module and a shoulder module. The pavement module and the shoulder module are of the same height. There are multiple pavement modules, and only one shoulder module is set at each shoulder on both sides. The pavement module is provided with a permeable pavement layer 1, a concrete asphalt layer 2 and two-level water-permeable layers from top to bottom. The concrete asphalt layer is a mixture of C40-C50 concrete and asphalt, and the weight ratio of C40-C50 concrete to asphalt is 1:10-20. On the one hand, high-strength C40-C50 concrete is added to the asphalt pavement to improve the bearing capacity of the concrete asphalt layer. On the other hand, the thickness of the concrete asphalt layer is not less than half of the total thickness of the two-level seepage layers, which not only supports the upper permeable pavement layer 1, but also protects the lower two-level seepage layers. The thickness of the permeable pavement layer 1 is greater than one-fifth of the thickness of the concrete asphalt layer 2, but not greater than one-quarter of the thickness of the concrete asphalt layer 2. A penetrating seepage column is arranged in the concrete asphalt layer 2. Rainwater on the upper permeable pavement layer 1 quickly penetrates into the concrete asphalt layer 2, and enters the two-level seepage layers from the seepage column 3, and finally penetrates into the water storage unit of the shoulder module, and is quickly discharged by the drainage device to avoid flooding. Both levels of seepage layers include seepage space and concrete support layers. In addition to the concrete support layer 6 close to the roadbed, seepage columns 3 are also arranged on the other concrete support layer 5. Based on the ratio of the thickness of the concrete asphalt layer 2 to the thickness of the other concrete support layer 5, the arrangement density of the seepage columns 3 in the concrete asphalt layer 2 is not higher than the arrangement density of the seepage columns 3 in the other concrete support layer 5. The seepage columns 3 are arranged on the concrete asphalt layer 2 below the permeable pavement layer and the other concrete support layer 5, effectively avoiding the phenomenon of blockage of pavement seepage holes or seepage columns. The shoulder module includes a seepage unit and a water storage unit. The seepage unit of the shoulder module is arranged at the shoulder, while the water storage unit is arranged outside the shoulder. The seepage unit is provided with a permeable pavement layer 1, a concrete layer 11 and a tertiary seepage layer from top to bottom. Except that the concrete support layer 10 of the tertiary seepage layer close to the roadbed is not provided with a seepage column 3, the concrete layer 11, the concrete support layer 9 and the concrete support layer 12 are all provided with a seepage column 3. The arrangement density of the seepage column 3 is different from that of the pavement module. Due to the different seepage amounts, the arrangement density of the seepage columns 3 of the concrete layer, the concrete support layer 12 and the concrete support 9 decreases from top to bottom to ensure the balance of the seepage amount.There are relative drainage holes 4 between each level of seepage layers of adjacent pavement modules, the two levels of seepage layers at the bottom of the shoulder module are flush with the two levels of seepage layers of the pavement module, and there are relative drainage holes 4 between each adjacent level of seepage layers, that is, the drainage holes 4 of each level of seepage layers of adjacent pavement modules are opposite, and the drainage holes between the relative seepage layers of adjacent pavement modules and shoulder modules are opposite, and a connected drainage pipe is provided in the drainage hole 4. While the shoulder module is draining water, the water in the seepage space of the pavement module gradually flows into the water storage unit 8 of the shoulder module. In order to make the water in the seepage space of the pavement module flow into the water storage unit 8 of the shoulder module faster, it is easy for technicians in this field to think of setting a pressure device in the drainage pipe. At the same time, in order to make the water in the water storage unit 8 be discharged as soon as possible, it is easy for technicians in this field to think of setting a drainage device in the water storage unit 8. The drainage device can be a water pump. It is also easy for technicians in this field to think of connecting the water storage units 8 along the extension direction of the pavement one by one, and finally introducing them into the urban water system or the urban drainage system.

[0028] In the above technical solution, preferably, the ratio of the seepage depth of each level of the pavement module's two-level seepage layer to the thickness of the concrete support layer is 1.5-2.5:1; and the ratio of the seepage depth of each level of the shoulder module's three-level seepage layer to the thickness of the concrete support layer is 1.5-2.5:1, simultaneously taking into account the requirements of both bearing capacity and water seepage. Preferably, a waterproof membrane is installed at the bottom of the two-level seepage layer of the pavement module and the bottom of the three-level seepage layer of the shoulder module, that is, a waterproof membrane is installed between the bottommost concrete support layer and the roadbed to effectively prevent rainwater from seeping into the roadbed.

[0029] In the above technical solution, the construction method of the long-life pavement pavement structure is as follows: Step 1, measure the width of the road, and calculate the length of the pavement module and the shoulder module, so that after the multiple pavement modules and shoulder modules are spliced, the water storage unit of the shoulder module is just located outside the shoulder; Step 2, assemble the pavement modules and shoulder modules in the same row one by one, and if necessary, a sealing layer can be set at the connection; Step 3, set a drainage device in the water storage unit of the shoulder module, and set an intelligent control mode of the drainage device at the same time.

[0030] In the above technical solution, after step three, the assembled long-life pavement pavement structure is also pre-watered, so that the polyester fiber in the seepage column expands first and then as described above, ensuring that the seepage gap is normal.

[0031] Figure 1 and Figure 2As shown, in one of the technical solutions, the two-level seepage layer of the pavement module and each level of the three-level seepage layer of the seepage unit include a seepage space and a concrete support layer arranged from top to bottom, wherein the two-level seepage layer of the pavement module includes a first seepage layer composed of a seepage space and a concrete support layer 5, and a second seepage layer composed of a seepage space and a concrete support layer 6; the three-level seepage layer of the seepage unit includes a third seepage layer composed of a seepage space and a concrete support layer 12, a fourth seepage layer composed of a seepage space and a concrete support layer 9, and a fifth seepage layer composed of a seepage space and a concrete support layer 10. The seepage layers arranged step by step are conducive to buffering the accumulated water, avoiding flooding and flood disasters in a short time.

[0032] like Figure 1 or Figure 2 In one of the technical solutions, a plurality of V-shaped support frames 7 are provided in the seepage space. The V-shaped support frames are arranged just between the upper and lower layers of the seepage space to play a supporting role, thereby enhancing the compressive strength and bearing capacity of the long-life asphalt pavement structure and extending its service life.

[0033] Figure 1 and Figure 2 It can be seen that in one of the technical solutions, the concrete asphalt layer 2 of the pavement module, the concrete support layer of the pavement module except the bottom concrete support layer, the concrete layer of the shoulder module and the concrete support layer of the shoulder module except the bottom concrete support layer are all provided with seepage holes 4, and except for the concrete support layer 6 close to the roadbed, another concrete support layer 5 is also arranged with seepage columns 3; except for the concrete support layer 10 of its third-level seepage layer close to the roadbed, no seepage columns 3 are set, the concrete layer 11 and the concrete support layer 9 and the concrete support layer 12 are all provided with seepage columns 3, so that the water in the seepage space of the pavement module gradually flows into the water storage unit 8 of the shoulder module.

[0034] In one of the technical solutions, a seepage column 3 is provided in the seepage hole, and the seepage column 3 includes a concrete outer ring, a cross steel plate arranged in the concrete along the radial direction of the concrete outer ring, and polyester fibers bonded between the cross steel plates. The polyester fibers will swell after being soaked in water for the first time. After the water is lost, the volume of the polyester fibers will become smaller and smaller than the original volume. Therefore, after the construction of the long-life asphalt pavement pavement structure provided by the present invention is completed, it is necessary to water it so that the polyester fibers in the seepage column 3 expand and then contract. After repeated use, the polyester fibers swell when exposed to water, which not only plays a supporting role, but also provides a seepage channel and absorbs some moisture.

[0035] In one of the technical solutions, the permeable pavement layer is a mixture of epoxy resin and asphalt, wherein the weight ratio of epoxy resin to asphalt is 1:50 to 80. Modifying the asphalt pavement with epoxy resin is beneficial to improving the permeability of the pavement layer. Compared with setting a porous structure on the asphalt pavement, the epoxy resin modification method does not have the problem of clogging of the pores in the asphalt pavement.

[0036] In one of the technical solutions, the concrete asphalt layer is a mixture of C40-C50 concrete and asphalt, wherein the weight ratio of C40-C50 concrete to asphalt is 1:10-20. The mixture of high-strength concrete and asphalt has high strength, strong bearing capacity, easy maintenance, and greater durability.

[0037] In one of the technical solutions, the two concrete support layers in the pavement module are C40~C45 concrete and C50~C60 concrete respectively. The arrangement density of the seepage columns in the concrete asphalt layer is not greater than the arrangement density of the seepage columns in the concrete support layer. Based on the ratio of the thickness of the concrete asphalt layer 2 to the thickness of the other concrete support layer 5, the arrangement density of the seepage columns 3 in the concrete asphalt layer 2 is not higher than the arrangement density of the seepage columns 3 in the other concrete support layer 5. The seepage columns 3 are arranged on the concrete asphalt layer 2 and the other concrete support layer 5 below the permeable pavement layer, effectively avoiding the phenomenon of blockage of pavement seepage holes or seepage columns.

[0038] In one of the technical solutions, the concrete layer in the shoulder module is C40~C50 concrete, and the three concrete support layers are C40~C45 concrete, C50~C60 concrete and C60~C80 concrete respectively. As the depth of the concrete layer and the concrete support layer increases, the arrangement density of the seepage columns decreases, which is different from the arrangement density of the seepage columns 3 of the pavement module. Due to the different seepage amounts, the arrangement density of the seepage columns 3 of the concrete layer, concrete support layer 12 and concrete support 9 decreases from top to bottom to ensure the balance of seepage amount.

[0039] The number of equipment and processing scale described here are used to simplify the description of the present invention. Applications, modifications and variations of the long-life asphalt pavement structure of the present invention will be obvious to those skilled in the art.

[0040] As described above, according to the present invention, the present invention includes at least the following beneficial effects: the long-life asphalt pavement pavement structure disclosed in the present invention is provided with an assembled pavement module and a shoulder module, wherein the pavement module is provided in an area with a large traffic volume on the pavement, and is laid in sequence from the center line of the pavement to the shoulder, and its design focuses on compressive strength and durability, and the shoulder module is provided at the shoulder, making full use of the characteristic that the roadbed decreases in height along the center line extending to both sides, and plays a role in connecting with the pavement module and storing and draining water, and its design focuses on permeability and drainage; the pavement module includes a permeable pavement layer, a concrete asphalt layer and a two-level seepage layer arranged from top to bottom, wherein the thickness of the concrete asphalt layer is not less than half of the total thickness of the two-level seepage layer to ensure the overall bearing capacity of the asphalt pavement pavement structure; the shoulder module includes a seepage unit and a water storage unit, and the seepage unit is provided with a permeable pavement layer, concrete and a three-level seepage layer in sequence from top to bottom, and is designed with more seepage cavities to receive water seeped by the pavement module to ensure the water storage and drainage capacity of the asphalt pavement pavement structure.

[0041] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. Long-life asphalt pavement structure, characterized by: include: Pavement modules are laid on the roadbed. Multiple pavement modules are laid from the center line of the road to the shoulders on both sides. Each pavement module is equipped with a permeable pavement layer, a concrete asphalt layer and two-level water seepage layers from top to bottom. A shoulder module is laid above the roadbed, is laid on the shoulder and is connected to the pavement module; the shoulder module includes a water seepage unit and a water storage unit, the water seepage unit is arranged near the pavement module, and is provided with a permeable pavement layer, a concrete layer, and three-level water seepage layers from top to bottom; the water storage unit is a water storage cavity arranged outside the shoulder and a drainage device for draining the water storage cavity; Among them, relative drainage holes are provided between each level of seepage layers of adjacent pavement modules, the two levels of seepage layers at the bottom of the shoulder module are flush with the two levels of seepage layers of the pavement module, and relative drainage holes are provided between each adjacent level of seepage layers, and a drainage hole connected to the water storage cavity is provided on the other side of the third level of seepage layer of the seepage unit of the shoulder module.

2. The long-life asphalt pavement structure according to claim 1, characterized in that: Each of the two-level seepage layers of the pavement module and the three-level seepage layer of the seepage unit includes a seepage space and a concrete support layer arranged from top to bottom.

3. The long-life asphalt pavement structure according to claim 2, characterized in that: A plurality of V-shaped support frames are arranged in the water seepage space.

4. The long-life asphalt pavement structure according to claim 3, characterized in that: Seepage holes are provided on the concrete asphalt layer of the pavement module, the concrete supporting layer of the pavement module except the bottom concrete supporting layer, the concrete layer of the shoulder module and the concrete supporting layer of the shoulder module except the bottom concrete supporting layer.

5. The long-life asphalt pavement structure according to claim 4, characterized in that: A water seepage column is provided in the water seepage hole. The water seepage column comprises a concrete outer ring, cross steel plates arranged in the concrete along the radial direction of the concrete outer ring, and polyester fibers bonded between the cross steel plates.

6. The long-life asphalt pavement structure according to claim 5, characterized in that: The raw material of the permeable pavement layer is a mixture of epoxy resin and asphalt, wherein the weight ratio of epoxy resin to asphalt is 1:50-80.

7. The long-life asphalt pavement structure according to claim 6, characterized in that: The raw material of the concrete asphalt layer is a mixture of C40-C50 concrete and asphalt, wherein the weight ratio of C40-C50 concrete to asphalt is 1:10-20.

8. The long-life asphalt pavement structure according to claim 7, characterized in that: The raw materials of the two concrete support layers in the pavement module are C40~C45 concrete and C50~C60 concrete respectively. The arrangement density of the seepage columns in the concrete asphalt layer is not greater than the arrangement density of the seepage columns in the concrete support layer.

9. The long-life asphalt pavement structure according to claim 8, characterized in that: The raw material of the concrete layer in the shoulder module is C40~C50 concrete, and the three concrete support layers are C40~C45 concrete, C50~C60 concrete and C60~C80 concrete. As the depth of the concrete layer and the concrete support layer increases, the arrangement density of the seepage columns decreases.

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