A permeable road structure with reinforced pavement

Abstract

This utility model relates to the field of road safety technology, and in particular to a permeable pavement structure with reinforced pavement, comprising a permeable surface layer, a pavement reinforcement layer, a pavement base layer, and a roadside drainage structure. The roadside drainage structure is located on one side of the pavement base layer, the permeable surface layer is located above the pavement base layer and the roadside drainage structure, and the pavement reinforcement layer is located between the permeable surface layer and the pavement base layer. The roadside drainage structure is connected to the existing urban drainage system. Rainwater infiltrates from the permeable surface layer and quickly flows into the roadside drainage structure, increasing the rainwater infiltration path and enabling rapid drainage of surface water, ensuring the strength of the permeable pavement structure. The pavement reinforcement layer can reduce the subsidence and cracking of the permeable surface layer, significantly improving pavement strength.

Description

Technical Field

[0001] This utility model relates to the field of road safety technology, and in particular to a pavement reinforced permeable road structure. Background Technology

[0002] Traditional road construction often uses conventional dense-graded asphalt mixtures. While these mixtures have low porosity and good smoothness, ensuring driving comfort, their drainage performance is generally poor, and their skid resistance decreases with age. This is especially problematic in rainy areas where water cannot drain quickly, severely impacting driving safety. Nowadays, with the promotion of sponge city initiatives, more and more urban road projects are choosing permeable pavements. Drainage-graded asphalt mixtures form a crucial structural layer for modern permeable roads, offering advantages such as noise reduction, drainage, fog suppression, and skid resistance.

[0003] However, existing permeable pavement structures have slow drainage, and in rainy areas, water will accumulate inside the permeable pavement structure for a long time. When soaked by water, the asphalt mortar is very easy to fall off between the aggregates, which leads to a decrease in the strength of the permeable pavement structure and makes it very easy to suffer from rutting, fatigue cracking and other defects.

[0004] Therefore, it is necessary to propose a pavement-reinforced permeable road structure to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main purpose of this utility model is to provide a pavement-reinforced permeable road structure to solve the technical problems of slow drainage leading to reduced strength and easy rutting and fatigue cracking in existing permeable road structures.

[0006] To achieve the above objectives, this utility model provides a permeable road structure with reinforced pavement, including a permeable surface layer, a pavement reinforcement layer, a pavement base layer, and a roadside drainage structure. The roadside drainage structure is located on one side of the pavement base layer, the permeable surface layer is located above the pavement base layer and the roadside drainage structure, the pavement reinforcement layer is located between the permeable surface layer and the pavement base layer, and the roadside drainage structure is connected to the existing urban drainage system.

[0007] Furthermore, the roadside drainage structure includes a drainage ditch, which is disposed on one side of the roadbed and extends longitudinally along the roadbed.

[0008] Furthermore, the drainage ditch is provided with a drain outlet, a first inlet, and a second inlet. The first inlet is located below the permeable surface layer and is connected to the permeable surface layer. The second inlet is connected to the bottom of the road base layer. The drain outlet is located at the bottom of the drainage ditch and is connected to the existing urban drainage system.

[0009] More preferably, the roadside drainage structure further includes a permeable cover plate, which is disposed between the first water inlet and the permeable surface layer, and the permeable cover plate closes the first water inlet.

[0010] More preferably, the roadside drainage structure further includes a permeable cloth, which covers the permeable cover plate.

[0011] Preferably, the road surface reinforcement layer adopts a mesh structure layer formed by interlaced reinforcing ribs.

[0012] More preferably, the surface of the reinforcing rib is wrapped with fiber bundles.

[0013] Furthermore, it also includes a waterproof layer for reducing water seepage in the road base layer, the waterproof layer being disposed between the road reinforcement layer and the road base layer.

[0014] Furthermore, it also includes a roadbed and a compacted layer, wherein the compacted layer is formed by compacting the original soil, the roadbed is set above the compacted layer, the pavement base course is set above the roadbed, and the bottom of the roadside drainage structure is set on one side of the roadbed.

[0015] Furthermore, it also includes a roadside reinforcement structure, which is disposed on the outside of the permeable road structure, and the side wall of the roadside reinforcement structure facing the permeable road structure is connected to the permeable surface layer and the roadside drainage structure respectively.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention, on the one hand, by setting up a roadside drainage structure under the road, allows rainwater to infiltrate from the permeable surface layer and quickly flow into the roadside drainage structure, increasing the rainwater infiltration path and enabling rapid drainage of road surface water. This prevents rainwater from accumulating in the permeable road structure and causing the asphalt mortar to detach, thus ensuring the strength of the permeable road structure. On the other hand, the road reinforcement layer set between the permeable surface layer and the road base layer can reduce the subsidence and cracking of the permeable surface layer, significantly improve the road surface strength, extend the service life of the permeable road structure, and ultimately reduce the incidence of defects such as rutting and fatigue cracking. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1This is a three-dimensional schematic diagram of the overall structure in a stepped cross-section according to one embodiment of the present utility model;

[0020] Figure 2 This is a planar schematic diagram showing the overall structure in cross-section according to one embodiment of the present invention.

[0021] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0022] Explanation of icon numbers:

[0023] 1. Permeable surface layer; 2. Waterproof layer; 3. Road surface reinforcement layer; 4. Road surface base layer; 5. Subgrade; 6. Compacted layer; 7. Roadside reinforcement structure; 8. Sidewalk; 9. Drainage ditch; 10. First inlet; 11. Permeable cover plate; 12. Second inlet; 13. Drainage outlet; 14. Transverse drainage pipe. Detailed Implementation

[0024] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] 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 protection scope of the present utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0028] Please see Figures 1 to 2As shown, this embodiment provides a permeable road structure with reinforced pavement, including a permeable surface layer 1, a pavement reinforcement layer 3, a pavement base layer 4, and a roadside drainage structure. The roadside drainage structure is located on one side of the pavement base layer 4, the permeable surface layer 1 is located above the pavement base layer 4 and the roadside drainage structure, the pavement reinforcement layer 3 is located between the permeable surface layer 1 and the pavement base layer 4, and the roadside drainage structure is connected to the existing urban drainage system.

[0029] To facilitate implementation of this embodiment by technical personnel, preferably, the thickness of the permeable surface layer 1 is 8-16 cm, and the porosity is 18%-23%. More specifically, the permeable surface layer 1 in this embodiment uses high-viscosity modified asphalt, wherein the high-viscosity modified asphalt contains 4% SBS and 20% rubber powder. Using SBS and rubber powder as modifiers combines the advantages of both. These modifiers can be prepared from engineering waste as raw materials, realizing the recycling of waste resources, reducing the production cost of modified asphalt, and resulting in asphalt with moderate viscosity, which is beneficial for construction. The network structure formed by SBS in the asphalt provides resistance to the settling of rubber particles, improving the storage stability of the modified asphalt and facilitating factory production. Moreover, the composite modified rubber asphalt combines the performance advantages of SBS modified asphalt with the low cost and environmental friendliness of rubber asphalt, making it highly valuable for widespread application.

[0030] Specifically, the road base layer 4 has a thickness of 51cm and is divided into three layers from top to bottom. The mass ratio of lime powder, fly ash and crushed stone in the first and third layers is 6:14:80, and the thickness of the first and third layers is 18cm. The mass ratio of lime powder, fly ash and crushed stone in the second layer is 10:20:70, and the thickness of the second layer is 15cm.

[0031] In this embodiment, on the one hand, by setting up a roadside drainage structure under the road, rainwater infiltrates from the permeable surface layer 1 and quickly flows into the roadside drainage structure, increasing the rainwater infiltration path and enabling rapid drainage of accumulated water. As part of the sponge city construction, this can improve the ability of urban roads to resist heavy rain, enhance traffic safety, and prevent rainwater from accumulating in the permeable road structure, causing asphalt mortar to fall off, thereby ensuring the strength of the permeable road structure. On the other hand, the pavement reinforcement layer 3 set between the permeable surface layer 1 and the pavement base layer 4 can reduce the subsidence and cracking of the permeable surface layer 1, significantly improve pavement strength, extend the service life of the permeable road structure, and ultimately reduce the incidence of rutting and fatigue cracking.

[0032] In this embodiment, the roadside drainage structure further includes a drainage ditch 9, which is disposed on one side of the road base layer 4 and extends longitudinally along the road base layer 4. The drainage ditch 9 is provided with a drain outlet 13, a first inlet 10, and a second inlet 12. The first inlet 10 is located below the permeable surface layer 1 and communicates with the permeable surface layer 1. The second inlet 12 communicates with the bottom of the road base layer 4. The drain outlet 13 is located at the bottom of the drainage ditch 9 and communicates with the existing urban drainage system.

[0033] Specifically, in this embodiment, the drainage ditch 9 extends longitudinally along the road, with a width of 30-50cm, a height of 50-80cm, and a wall thickness of 4-6cm. The first inlet 10 can be a continuous ditch formed together with the drainage ditch 9, or it can be several inlet holes connected to the drainage ditch 9, spaced 1-1.5m apart longitudinally along the road. The bottom end of the second inlet 12 is 5-6cm higher than the bottom surface of the drainage ditch 9. The bottom end of the drain outlet 13 is flush with the bottom surface of the drainage ditch 9, the diameter of the drain outlet 13 is 8-15cm, and the spacing of the drain outlets 13 longitudinally along the road is 3-6m. A transverse drainage pipe 14 is used to connect with the existing storm drain in the existing urban drainage system. The transverse drainage pipe 14 is located below the sidewalk 8 and is made of PE or PVC plastic. The outlet of the transverse drainage pipe 14 is higher than the bottom of the existing storm drain to prevent rainwater from flowing back into the drainage ditch 9.

[0034] As a further preferred embodiment, the roadside drainage structure further includes a permeable cover plate 11 and a permeable fabric. The permeable cover plate 11 is disposed between the first inlet 10 and the permeable surface layer 1, sealing the first inlet 10. The permeable fabric covers the permeable cover plate 11. The top surface of the permeable cover plate 11 is flush with the top surface of the road base layer 4 structure, and the thickness of the permeable cover plate 11 is 3-5 cm. The permeable cover plate 11 can enhance the load-bearing capacity at the location of the first inlet 10, and the permeable fabric prevents particles from the permeable surface layer 1 from entering the drainage ditch 9.

[0035] In one embodiment, the road surface reinforcement layer 3 adopts a mesh structure layer formed by interlaced reinforcing ribs, and the surface of the reinforcing ribs is wrapped with fiber bundles. Specifically, in this embodiment, the reinforcing ribs are made of basalt fiber, with an elastic modulus of 45-65 GPa and a tensile strength of 900-1600 MPa. The diameter of the reinforcing ribs is 0.5 cm, the spacing is 15 cm, and they are arranged in a square mesh.

[0036] The reinforcing rib is a ribbed composite material made by mixing basalt fiber and matrix material in a certain proportion and then pultruding it with fiber bundles wrapped around the surface. Compared with steel bars, the reinforcing rib has many advantages such as being lightweight, high-strength, and corrosion-resistant, and is considered an ideal material to replace steel bars in civil engineering. The proper combination of basalt fiber and permeable asphalt concrete can improve the durability of pavement structures in rainy areas. Placing it on top of the waterproof layer 2 can prevent rainwater from corroding the reinforcing rib, greatly reduce the impact of rainfall on the pavement base layer 4, and at the same time improve the pavement strength, enabling it to better withstand and transmit vehicle loads, reduce rutting and fatigue cracking, and extend its service life.

[0037] In one embodiment, a waterproof layer 2 is further included to reduce water seepage in the pavement base course 4. The waterproof layer 2 is disposed between the pavement reinforcement layer 3 and the pavement base course 4. Specifically, in this embodiment, the waterproof layer 2 is made of a double layer of waterproof geotextile laid on the pavement base course 4 structure. Its tensile strength is ≥7.5KN / m, CBR puncture strength is 1.5KN, tear strength is ≥0.25KN, and impermeability strength is ≥0.5Mpa. The longitudinal and transverse overlap width of the waterproof geotextile shall not be less than 20cm.

[0038] In one embodiment, the system further includes a roadbed 5 and a compacted layer 6, the compacted layer 6 being formed by compacting existing soil. The roadbed 5 is positioned above the compacted layer 6, the pavement base course 4 is positioned above the roadbed 5, and the bottom of the roadside drainage structure is positioned on one side of the roadbed 5. Specifically, in this embodiment, the roadbed 5 has a thickness of 80 cm and uses a 10% lime-soil and crushed stone mix. The roadbed 5 and the compacted layer 6 further enhance the strength of this embodiment, preventing damage to the road surface from heavy-load vehicles.

[0039] In one embodiment, a roadside reinforcement structure 7 is further included. The roadside reinforcement structure 7 is disposed on the outside of the permeable pavement structure, and its sidewall facing the permeable pavement structure is connected to both the permeable surface layer 1 and the roadside drainage structure. In this embodiment, the roadside reinforcement structure 7 is a road curbstone. The road curbstone constrains the permeable surface layer 1 and the roadside drainage structure from the outside, preventing lateral deformation of the permeable pavement structure under long-term use.

[0040] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A permeable road structure with reinforced pavement, characterized in that, It includes a permeable surface layer, a pavement reinforcement layer, a pavement base layer, and a roadside drainage structure. The roadside drainage structure is located on one side of the pavement base layer, the permeable surface layer is located above the pavement base layer and the roadside drainage structure, the pavement reinforcement layer is located between the permeable surface layer and the pavement base layer, and the roadside drainage structure is connected to the existing urban drainage system.

2. The pavement-reinforced permeable road structure according to claim 1, characterized in that, The roadside drainage structure includes a drainage ditch, which is located on one side of the road base layer and extends longitudinally along the road base layer.

3. The pavement-reinforced permeable road structure according to claim 2, characterized in that, The drainage ditch is provided with a drain outlet, a first inlet, and a second inlet. The first inlet is located below the permeable surface layer and is connected to the permeable surface layer. The second inlet is connected to the bottom of the road base layer. The drain outlet is located at the bottom of the drainage ditch and is connected to the existing urban drainage system.

4. The pavement-reinforced permeable road structure according to claim 3, characterized in that, The roadside drainage structure also includes a permeable cover plate, which is disposed between the first water inlet and the permeable surface layer, and the permeable cover plate seals the first water inlet.

5. The pavement-reinforced permeable road structure according to claim 4, characterized in that, The roadside drainage structure also includes a permeable fabric, which covers the permeable cover plate.

6. The pavement-reinforced permeable road structure according to claim 1, characterized in that, The road surface reinforcement layer adopts a mesh structure layer formed by interlaced reinforcing bars.

7. The pavement-reinforced permeable road structure according to claim 6, characterized in that, The surface of the reinforcing rib is wrapped with fiber bundles.

8. The pavement-reinforced permeable road structure according to claim 1, characterized in that, It also includes a waterproof layer for reducing water seepage in the road base layer, the waterproof layer being disposed between the road reinforcement layer and the road base layer.

9. The pavement-reinforced permeable road structure according to claim 1, characterized in that, It also includes a roadbed and a compacted layer, the compacted layer being formed by compacting the existing soil, the roadbed being set above the compacted layer, the pavement base course being set above the roadbed, and the bottom of the roadside drainage structure being set on one side of the roadbed.

10. The pavement-reinforced permeable road structure according to claim 1, characterized in that, It also includes a roadside reinforcement structure, which is located on the outside of the permeable road structure. The side wall of the roadside reinforcement structure facing the permeable road structure is connected to the permeable surface layer and the roadside drainage structure, respectively.

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