Semi-flexible composite pavement structure

Abstract

The utility model discloses a semi-flexible composite pavement structure, and relates to the technical field of road engineering, the semi-flexible composite pavement structure comprises a rigid base layer, a transition layer, a flexible surface layer and a pavement coating, and embedded parts are arranged in the rigid base layer, the transition layer and the flexible surface layer; three layers of materials are stacked and combined, embedded parts are arranged inside, a stable mechanical meshing structure which is narrow in top and wide in bottom can be formed, reflection cracks and interlayer stripping can be effectively restrained, a pavement coating sealing layer is finally coated, the service life of a pavement is remarkably prolonged, the driving comfort is remarkably improved, meanwhile, the maintenance cost is reduced, and the service life of the pavement is prolonged. The long-acting stable pavement performance combining rigidity and softness is realized.

Description

A semi-flexible composite pavement structure Technical Field

[0001] This utility model belongs to the field of road engineering technology, specifically, it relates to a semi-flexible composite pavement structure. Background Technology

[0002] Semi-flexible pavement is a composite pavement material that combines rigidity and flexibility. It is formed by injecting a special cement-based grouting material with high fluidity into a large-void asphalt mixture after compaction. Semi-flexible pavement combines the advantages of asphalt pavement and cement pavement, and exhibits strong advantages in road performance. It can improve the pavement's ability to resist loads, increase driving speed and comfort. At the same time, semi-flexible pavement also has excellent high-temperature stability and anti-skid performance.

[0003] Chinese patent CN221701992U discloses a flexible pavement structure, including a soft base layer, a coarse aggregate layer, a fine aggregate layer, a lower asphalt layer, an asphalt heating layer, and an upper asphalt layer. The coarse aggregate layer is laid on top of the soft base layer, the fine aggregate layer is laid on top of the coarse aggregate layer, the lower asphalt layer is laid on top of the fine aggregate layer, the asphalt heating layer is laid on top of the lower asphalt layer, and the upper asphalt layer is laid on top of the asphalt heating layer. The asphalt heating layer includes a rubber pad and heating wires. The above-mentioned prior art uses multiple layers of materials to form a composite pavement. The multiple layers of materials and mechanical structures work together to improve the overall performance. However, there is no fixed structure connecting the various layers, which makes the connection poor. After long-term use, delamination and cracking are likely to occur, affecting the overall service life of the pavement.

[0004] In view of this, this utility model is hereby proposed. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a semi-flexible composite pavement structure, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A semi-flexible composite pavement structure includes: a rigid base layer, a transition layer, a flexible surface layer, and embedded parts, characterized in that a transition layer is provided on top of the rigid base layer, and a flexible surface layer is provided on top of the transition layer.

[0008] Optionally, embedded parts are provided inside the rigid base layer, transition layer and flexible surface layer.

[0009] Optionally, the upper part of the embedded part has a trapezoidal structure.

[0010] Optionally, the embedded part has a flow channel inside, and the flow channel is filled with grouting material.

[0011] Optionally, the surface of the embedded part is sandblasted.

[0012] Optionally, a drainage groove is provided on the top of the flexible surface layer, and the drainage groove is at a 45° angle to the driving direction.

[0013] Optionally, the flexible surface layer is coated with a road surface coating.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0015] This semi-flexible composite pavement structure is formed by combining three layers of materials. It utilizes a combination of rigid and flexible materials and incorporates embedded parts that penetrate all three layers. The structure, which is narrower at the top and wider at the bottom, forms a stable mechanical interlocking structure that connects the three base layers. Grouting material is injected at the joints to decompose horizontal shear forces into vertical pressure and inclined friction, resisting interlayer slippage and reducing the occurrence of interlayer separation. This improves the overall service life. Finally, a pavement coating is applied for sealing, which effectively inhibits reflective cracking and interlayer delamination, significantly improving pavement service life and driving comfort, while reducing maintenance costs and achieving long-term stable pavement performance that combines rigidity and flexibility.

[0016] This semi-flexible composite pavement structure features drainage grooves on its surface to guide and divert water from the road surface, preventing water accumulation over long periods and reducing damage to the structure caused by winter icing and expansion. The grooves are arranged at an angle to the direction of travel to avoid the grooves being completely parallel or perpendicular to the direction of wheel travel, thus reducing concentrated wear and extending the service life of the texture.

[0017] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0019] Figure 1 is a cross-sectional view of this utility model;

[0020] Figure 2 is a schematic diagram of the embedded part of this utility model;

[0021] Figure 3 is a schematic diagram of the drainage channel of this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Rigid base layer; 2. Transition layer; 3. Flexible surface layer; 4. Embedded parts; 401. Flow channel; 5. Grouting material; 6. Drainage channel; 7. Road surface coating.

[0024] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Please refer to Figures 1-3. In this embodiment, a semi-flexible composite pavement structure is provided, including: a rigid base layer 1, a transition layer 2, a flexible surface layer 3, and embedded parts 4.

[0027] As shown in Figure 1, in this embodiment, a transition layer 2 is provided on top of the rigid base layer 1, and a flexible surface layer 3 is provided on top of the transition layer 2. The rigid base layer 1 is located at the bottom and is made of cement concrete, providing solid load-bearing capacity. It is suitable for heavy traffic, has strong stability and excellent resistance to deformation, and reduces the impact of uneven settlement of the roadbed. The flexible surface layer 3 on top is made of asphalt mixture to provide a smooth and low-noise driving surface. The transition layer 2 between the two provides a buffering effect and uses elastic materials to coordinate the difference in modulus between the upper and lower layers, reducing stress concentration. Through the three complementary layers, they jointly resist load, temperature and water damage. The materials and thickness of each layer can be adjusted to match different climate and traffic conditions.

[0028] As shown in Figure 1, in this embodiment, the rigid base layer 1, the transition layer 2, and the flexible surface layer 3 are equipped with embedded parts 4. During the laying process, the laying starts from the bottom rigid base layer 1, and several embedded parts 4 are pre-installed. After solidification and stabilization, the transition layer 2 and the flexible surface layer are laid to ensure that all three layers can contact the embedded parts 4, thus completing the laying of the overall road structure.

[0029] As shown in Figure 2, the upper part of the embedded part 4 in this embodiment is a trapezoidal structure; the trapezoidal structure makes the embedded part 4 narrower at the top and wider at the bottom, forming a stable mechanical interlocking structure, which decomposes the horizontal shear force into vertical pressure and inclined friction force, and works together to resist interlayer slippage. The four surfaces simultaneously apply force to support, thereby avoiding the risk of delamination of the composite pavement in multiple directions.

[0030] As shown in Figures 1 and 2, the embedded part 4 in this embodiment has a flow channel 401 inside, and the flow channel 401 is filled with grouting material 5. During the molding and cooling process, the three surface structures shrink, and cavities are generated in the contact area with the embedded part 4. At this time, the grouting material 5 is injected through the flow channel 401 in the top area. The grouting material 5 fills the embedded part 4 by gravity through the flow channel 401. The flow channel 401 is connected to the side and bottom of the embedded part 4, so that the grouting material 5 can quickly fill the gaps on the side of the embedded part 4, forming an elastic pad in the cavity, avoiding cracking caused by direct hard contact. The grouting material 5 uses a highly fluid slurry to ensure filling, and filling is carried out by applying external pressure. After filling is completed, the remaining flexible surface layer 3 can be laid.

[0031] As shown in Figure 2, the surface of the embedded part 4 in this embodiment is sandblasted. After the grouting material 5 has completely solidified, the sandblasted surface enhances the friction coefficient between the grouting material 5 and the embedded part 4, further improving the overall bonding effect and preventing the grouting material 5 from peeling off from the corresponding layer and the embedded part 4.

[0032] As shown in Figure 3, the top of the flexible surface layer 3 in this embodiment is provided with a drainage groove 6, which is at a 45° angle to the driving direction. The drainage groove 6 guides and drains water from the road surface, preventing water from accumulating for a long time and reducing the damage to the structure caused by ice expansion in winter. The angled arrangement with the driving direction prevents the grooves from being completely parallel or perpendicular to the wheel's driving direction, reducing concentrated wear, extending the service life of the texture, and providing balanced longitudinal and lateral friction during braking, thus improving driving stability.

[0033] As shown in Figure 1, the flexible surface layer 3 of this embodiment is coated with a road surface coating 7. After the road structure is completed, the road surface coating 7 is finally coated on the top flexible surface layer 3. The coating is arranged on the surface and in the drainage channel 6, which effectively reduces water penetration, enhances the drainage channel 6's unobstructed flow, prevents water, oil stains, etc. from eroding the base layer, and extends the roadbed's lifespan.

[0034] Working principle: The semi-flexible composite pavement structure of this utility model sets up embedded parts 4 when laying the rigid base layer 1, continuously lays the corresponding transition layer 2 and flexible surface layer 3, and then injects grouting material 5 into the flow channel 401 of the embedded parts 4 under high pressure to fill it. The embedded parts 4 construct a three-dimensional interlocking interface, and the surface is coated with pavement coating 7. At the same time, an elastic buffer transition layer 2 is laid between the rigid base layer 1 and the flexible surface layer 3 to form a composite structure of "mechanical interlocking + material adaptation". It has the characteristics of strong interlayer shear resistance, good deformation coordination and excellent durability.

[0035] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A semi-flexible composite pavement structure, comprising: The rigid base layer (1), transition layer (2), flexible surface layer (3) and embedded part (4) are characterized in that the rigid base layer (1) is provided with a transition layer (2) on top, and the transition layer (2) is provided with a flexible surface layer (3) on top.

2. The semi-flexible composite pavement structure according to claim 1, characterized in that, The rigid base layer (1), transition layer (2) and flexible surface layer (3) are provided with embedded parts (4).

3. The semi-flexible composite pavement structure according to claim 2, characterized in that, The upper part of the embedded part (4) is a trapezoidal structure.

4. The semi-flexible composite pavement structure according to claim 2, characterized in that, The embedded part (4) has a flow channel (401) inside, and the flow channel (401) is filled with grouting material (5).

5. A semi-flexible composite pavement structure according to claim 2, characterized in that, The surface of the embedded part (4) is sandblasted.

6. The semi-flexible composite pavement structure according to claim 1, characterized in that, The flexible surface layer (3) has a drainage groove (6) on top, and the drainage groove (6) is at a 45° angle to the driving direction.

7. The semi-flexible composite pavement structure according to claim 1, characterized in that, The flexible surface layer (3) is coated with a road surface coating (7).

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