Composite asphalt pavement

Abstract

The utility model provides a composite asphalt pavement, which relates to the technical field of constructional engineering and comprises a subgrade base layer, a gravel layer laid at the upper end of the subgrade base layer, a concrete base layer laid at the upper end of the gravel layer, a concrete surface layer laid at the upper end of the concrete base layer and an asphalt surface layer laid at the upper end of the concrete surface layer. A reinforcing assembly is arranged between the concrete base layer and the gravel layer, an expansion joint is formed in the center of the interior of the asphalt surface layer in a penetrating mode, the concrete base layer serves as a main bearing layer and is made of high-strength and low-shrinkage cement concrete materials, and the concrete base layer effectively resists the repeated action of wheel loads through the firm structure of the concrete base layer. Meanwhile, the reinforcing assembly is arranged between the concrete base layer and the gravel layer, the binding power between the concrete base layer and the gravel layer and the stability of the whole structure are enhanced through the reinforcing assembly, and the bearing capacity of the pavement is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction engineering, and more specifically, relates to a composite asphalt pavement. Background Art

[0002] Asphalt pavement is a type of pavement structure widely used in road construction. It is mainly composed of asphalt materials as a binder, mixed with mineral aggregates. This pavement structure has many significant advantages, such as good flatness, excellent wear resistance and skid resistance, and can provide vehicles with a stable and comfortable driving environment. In the construction of asphalt pavement, asphalt materials play a vital role. It can not only firmly bond mineral aggregates together to form a pavement layer with higher overall strength, but also effectively absorb and disperse the impact force of wheel loads through its elasticity and recovery, reducing stress concentration and damage to the pavement. In addition, asphalt materials also have good water stability and weather resistance, and can resist the damage to the pavement structure caused by moisture erosion and temperature changes.

[0003] Under existing technical conditions, repeated rolling of large trucks will cause cumulative damage to asphalt pavement. This damage is not only reflected in the wear and dents on the surface of the pavement, but more importantly, it will cause changes in the internal structure of the asphalt pavement. Since the asphalt material itself has a certain elasticity and recovery, it can absorb and disperse the impact force from the wheels to a certain extent. However, when the impact force exceeds the bearing limit of the asphalt material, its elasticity will gradually decrease. As the elasticity decreases, the asphalt pavement will not be able to effectively disperse and absorb the impact force when it is further rolled, resulting in stress concentration inside the pavement. The stress concentration point will gradually expand and form cracks, and eventually cause the pavement to collapse. Once the pavement collapses, it will not only affect driving safety and comfort, but also accelerate the aging and damage process of the pavement, shortening its service life. Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies to provide a composite asphalt pavement in order to achieve a more practical purpose. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a composite asphalt pavement to solve the problem that the current asphalt pavement cannot effectively disperse and absorb the impact force when it is further compacted, thereby causing stress concentration inside the pavement. The stress concentration point will gradually expand and form cracks, and eventually cause the pavement to collapse. Once the pavement collapses, it will not only affect the safety and comfort of driving, but also accelerate the aging and damage process of the pavement, shortening its service life.

[0005] The purpose and effect of the composite asphalt pavement of the utility model are achieved by the following specific technical means:

[0006] A composite asphalt pavement comprises a roadbed base, a gravel layer is laid on the upper end of the roadbed base, a concrete base is laid on the upper end of the gravel layer, a concrete surface layer is laid on the upper end of the concrete base, an asphalt surface layer is laid on the upper end of the concrete surface layer, a reinforcement component is arranged between the concrete base and the gravel layer, and an expansion joint is opened through the center of the asphalt surface layer.

[0007] Furthermore, the roadbed base layer is composed of high-strength, highly permeable gravel soil or weathered rock material.

[0008] Furthermore, the gravel layer is composed of natural gravel or artificial crushed stone with uniform particle size and hard texture.

[0009] Furthermore, the asphalt surface layer adopts modified asphalt material, to which additives such as anti-aging agents and plasticizers can be added.

[0010] Furthermore, the reinforcement assembly includes a plurality of transverse steel bars, and the plurality of transverse steel bars are arranged and fixedly connected between the gravel layer and the concrete base layer, and a plurality of longitudinal steel bars are arranged and fixedly connected at the upper ends of the plurality of transverse steel bars.

[0011] Furthermore, the intersections of the plurality of transverse steel bars and the plurality of longitudinal steel bars are fixedly connected with support steel bars, and the upper and lower ends of the plurality of support steel bars are fixedly connected with contact plates.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the utility model, a reinforcement component is provided between the concrete base layer and the gravel layer, which enhances the bonding force between the two layers and the stability of the overall structure, further improving the bearing capacity of the road surface. Above the concrete base layer, the concrete surface layer serves as a transition layer and is composed of wear-resistant and anti-skid fine-grained cement concrete material, which not only improves the flatness and driving comfort of the road surface, but also enhances the anti-skid and wear resistance of the road surface. The asphalt surface layer serves as the uppermost layer of the road surface and is composed of modified asphalt material, which has excellent elasticity and recovery. The asphalt surface layer can effectively absorb and disperse the impact force of the wheel load. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional schematic diagram of a composite asphalt pavement of the utility model;

[0015] Figure 2 This is a three-dimensional split schematic diagram of a composite asphalt pavement of the utility model;

[0016] Figure 3 Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0017] Figure 4 of Figure 2 A partial enlarged schematic diagram of point B in the middle.

[0018] In the figure, the corresponding relationship between the component names and the drawing numbers is as follows:

[0019] 1. Roadbed base; 2. Gravel layer; 3. Concrete base; 4. Concrete surface layer; 5. Asphalt surface layer; 6. Expansion joint; 7. Reinforcement components; 701. Transverse reinforcement; 702. Longitudinal reinforcement; 703. Support reinforcement; 704. Contact plate. DETAILED DESCRIPTION

[0020] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] Example:

[0024] As attached Figure 1 To the attached Figure 4 As shown:

[0025] The utility model provides a composite asphalt pavement, including a roadbed base layer 1, a gravel layer 2 is laid on the upper end of the roadbed base layer 1, a concrete base layer 3 is laid on the upper end of the gravel layer 2, a concrete surface layer 4 is laid on the upper end of the concrete base layer 3, and an asphalt surface layer 5 is laid on the upper end of the concrete surface layer 4. A reinforcement component 7 is arranged between the concrete base layer 3 and the gravel layer 2, and an expansion joint 6 is opened through the center of the asphalt surface layer 5. The composite asphalt pavement is composed of a roadbed base layer 1, a gravel layer 2, a concrete base layer 3, a concrete surface layer 4 and an asphalt surface layer 5 from bottom to top. Each layer has a specific function and role and works together to improve the overall performance and durability of the road surface. First, the roadbed base layer 1, as the foundation of the entire road surface, is made of high-strength and well-permeable materials to ensure the stability and drainage performance of the road surface structure. It can effectively disperse the load from the wheels and reduce the settlement and deformation of the lower part of the road surface. Then, the gravel layer 2 is laid on the roadbed base layer 1 and is composed of natural gravel or artificially crushed stone with uniform particle size and hard texture. The gravel layer 2 not only provides a good drainage effect, but also enhances the bearing capacity of the pavement structure, further dispersing the pressure of the wheel load on the lower structure. Above the gravel layer 2, the concrete base layer 3 serves as the main load-bearing layer and is composed of high-strength, low-shrinkage cement concrete materials. The concrete base layer 3 effectively resists the repeated effects of wheel loads through its solid structure, reducing the deformation and damage of the pavement. At the same time, a reinforcement component 7 is provided between the concrete base layer 3 and the gravel layer 2. The reinforcement component 7 enhances the bonding force between the two layers and the stability of the overall structure, further improving the bearing capacity of the pavement. Above the concrete base layer 3, the concrete surface layer 4 serves as a transition layer and adopts wear-resistant, non-slip fine-grained water It is composed of mud concrete material, which not only improves the flatness and driving comfort of the road surface, but also enhances the anti-skid and wear resistance of the road surface. The asphalt surface layer 5, as the top layer of the road surface, is composed of modified asphalt material with excellent elasticity and recovery. The asphalt surface layer 5 can effectively absorb and disperse the impact force of the wheel load, reduce the stress concentration and damage of the road surface. At the same time, in order to cope with the problem of road cracking caused by frequent rolling of large and heavy-loaded vehicles, an expansion joint 6 is opened through the center of the asphalt surface layer 5. The expansion joint 6 is a telescopic device of the road surface, which can allow the road surface to undergo certain deformation and displacement under temperature changes or loads, thereby effectively alleviating the stress concentration phenomenon inside the road surface and reducing the risk of road cracking.

[0026] Among them, the roadbed base layer 1 is composed of high-strength, well-permeable crushed stone soil or weathered rock material, the gravel layer 2 is composed of natural gravel or artificial crushed stone with uniform particle size and hard texture, and the asphalt surface layer 5 is composed of modified asphalt material, to which anti-aging agent, plasticizer and other additives can be added. The roadbed base layer 1 is composed of high-strength, well-permeable crushed stone soil or weathered rock material. Its main working principle is to provide stable road surface support. These materials have good bearing capacity and deformation resistance, can effectively disperse wheel loads, reduce settlement and deformation of the lower part of the road surface, and at the same time, its permeability helps to drain road surface water and prevent water from eroding and damaging the road surface structure. The gravel layer 2 is composed of natural gravel or artificial crushed stone with uniform particle size and hard texture. It is composed of artificially crushed stones, and its main working principle is to enhance the bearing capacity and drainage performance of the pavement structure. The gravel layer 2 can effectively transfer the wheel load to the lower structure. At the same time, its good drainage performance helps to keep the road surface dry and reduce the occurrence of water damage. The asphalt surface layer 5 adopts modified asphalt material, to which anti-aging agents, plasticizers and other additives can be added. Its main working principle is to provide a flat, wear-resistant and non-slip driving surface. The modified asphalt material has excellent elasticity and recovery, and can effectively absorb and disperse the impact force of wheel loads, reduce stress concentration and damage to the road surface. The addition of additives such as anti-aging agents and plasticizers further improves the durability and anti-aging performance of the asphalt surface layer 5, and extends the service life of the road surface.

[0027] The reinforcement assembly 7 includes a plurality of transverse steel bars 701, which are arranged and fixedly connected between the gravel layer 2 and the concrete base 3. The upper ends of the plurality of transverse steel bars 701 are arranged and fixedly connected to a plurality of longitudinal steel bars 702. The intersections of the plurality of transverse steel bars 701 and the plurality of longitudinal steel bars 702 are fixedly connected to support steel bars 703. The upper and lower ends of the plurality of support steel bars 703 are fixedly connected to contact plates 704. The reinforcement assembly 7 is composed of a plurality of transverse steel bars 701, longitudinal steel bars 702, support steel bars 703 and contact plates 704. Its main working principle is to enhance the bonding force between the gravel layer 2 and the concrete base 3 and the stability of the overall structure. The transverse steel bars 701 and the longitudinal steel bars 702 are intertwined to form a grid structure, which effectively improves the shear strength and tensile strength of the pavement structure. The supporting steel bars 703 are connected at the intersection of the transverse steel bars 701 and the longitudinal steel bars 702, further enhancing the overall stability of the structure. The contact plate 704 ensures close contact between the reinforcement component 7 and the gravel layer 2 and the concrete base 3, thereby improving the bonding force and preventing voids and sliding between the structures.

[0028] The specific usage and function of this embodiment are as follows:

[0029] The roadbed base layer 1 is composed of high-strength, highly permeable gravel soil or weathered rock materials. Its main working principle is to provide stable road surface support. These materials have good bearing capacity and deformation resistance, can effectively disperse wheel loads, and reduce settlement and deformation of the lower part of the road surface. At the same time, its permeability helps to drain road surface water and prevent water from eroding and damaging the road surface structure. The gravel layer 2 is composed of natural gravel or artificially crushed stone with uniform particle size and hard texture. Its main working principle is to enhance the bearing capacity and drainage performance of the road surface structure. The gravel layer 2 can effectively transfer wheel loads to the lower structure. At the same time, its good drainage performance helps to keep the road surface dry and reduce the occurrence of water damage. The asphalt surface layer 5 uses modified asphalt material, to which anti-aging agents, plasticizers and other additives can be added. Its main working principle is to provide a smooth, wear-resistant and non-slip driving surface. The modified asphalt material has excellent elasticity and recovery. It can effectively absorb and disperse the impact force of wheel loads, reduce stress concentration and damage to the road surface. The addition of additives such as anti-aging agents and plasticizers further improves the durability and anti-aging performance of the asphalt surface layer 5, and extends the service life of the road surface. The reinforcement component 7 is composed of multiple transverse steel bars 701, longitudinal steel bars 702, support steel bars 703 and contact plates 704. Its main working principle is to enhance the bonding force between the gravel layer 2 and the concrete base 3 and the stability of the overall structure. The transverse steel bars 701 and the longitudinal steel bars 702 are staggered to form a grid structure, which effectively improves the shear strength and tensile strength of the road surface structure. The support steel bars 703 are connected at the intersection of the transverse steel bars 701 and the longitudinal steel bars 702, further enhancing the overall stability of the structure. The contact plate 704 ensures close contact between the reinforcement component 7 and the gravel layer 2 and the concrete base 3, improves the bonding force, and prevents voids and sliding between the structures.

[0030] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A composite asphalt pavement comprising a roadbed base (1), characterized in that: A gravel layer (2) is laid on the upper end of the roadbed base (1), a concrete base (3) is laid on the upper end of the gravel layer (2), a concrete surface layer (4) is laid on the upper end of the concrete base (3), an asphalt surface layer (5) is laid on the upper end of the concrete surface layer (4), a reinforcement component (7) is provided between the concrete base (3) and the gravel layer (2), and an expansion joint (6) is provided through the center of the asphalt surface layer (5).

2. A composite asphalt pavement according to claim 1, characterized in that: The roadbed base (1) is made of high-strength, well-permeable gravel soil or weathered rock material.

3. The composite asphalt pavement according to claim 1, characterized in that: The gravel layer (2) is composed of natural gravel or artificial crushed stone with uniform particle size and hard texture.

4. The composite asphalt pavement according to claim 1, characterized in that: The reinforcement assembly (7) comprises a plurality of transverse steel bars (701), the plurality of transverse steel bars (701) being arranged and fixedly connected between the gravel layer (2) and the concrete base layer (3), and a plurality of longitudinal steel bars (702) being arranged and fixedly connected at the upper ends of the plurality of transverse steel bars (701).

5. The composite asphalt pavement according to claim 4, characterized in that: The cross-sections of the plurality of transverse steel bars (701) and the plurality of longitudinal steel bars (702) are fixedly connected to support steel bars (703), and the upper and lower ends of the plurality of support steel bars (703) are fixedly connected to contact plates (704).

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