Semi-flexible composite pavement structure

Abstract

The utility model provides a semi-flexible composite pavement structure and belongs to the technical field of road construction. A semi-flexible composite pavement structure comprises a base layer, asphalt tack coat oil and an asphalt mixture layer, the asphalt tack coat oil is arranged between the base layer and the asphalt mixture layer and serves as a binder, the total void ratio of the asphalt mixture layer is 19%-28%, the communication void ratio of the asphalt mixture layer is 17%-26%, and gaps of the asphalt mixture layer are filled with cement.

Description

Technical Field

[0001] The invention belongs to the technical field of road construction, in particular to a semi-flexible composite pavement structure. Background Art

[0002] The depth of road rutting directly affects the comfort, safety and service life of vehicles. At present, the road surface has poor anti-rutting performance. After long-term use, its anti-deformation ability will decrease, and it is easy to have local cracks and collapse problems, which will bring great safety hazards to vehicle driving. Especially on ordinary roads and at intersections, where trucks stay for a long time, collapse is more likely to occur. Summary of the invention

[0003] The purpose of the present invention is to address the above-mentioned problems in the prior art and to propose a semi-flexible composite pavement structure which is not prone to cracking and collapse.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A semi-flexible composite pavement structure comprises: a base layer, an asphalt tack coat and an asphalt mixture layer, wherein the asphalt tack coat is arranged between the base layer and the asphalt mixture layer and serves as a binder, the total void ratio of the asphalt mixture layer is 19%-28%, the connected void ratio is 17%-26%, and the gaps in the asphalt mixture layer are filled with cement.

[0006] In the above-mentioned semi-flexible composite pavement structure, the thickness of the asphalt mixture layer is 8-12 cm.

[0007] In the above-mentioned semi-flexible composite pavement structure, the base layer is an old pavement after milling or a newly built pavement.

[0008] In the above-mentioned semi-flexible composite pavement structure, when cracks exist in the base layer, a rubber asphalt chip seal layer is provided between the base layer and the asphalt tack coat oil.

[0009] The above-mentioned semi-flexible composite pavement structure also includes a skeleton, which includes a main body and a plurality of connecting parts connected to the main body. The main body is a mesh structure, and the main body is arranged in the asphalt mixture layer. The connecting parts are bolts, which are threadedly connected to the base layer, and the bolts are welded to the main body.

[0010] Compared with the prior art, this application has the following advantages:

[0011] In the present application, since cement is filled in the asphalt mixture layer, the rutting resistance of the road surface is significantly improved, and the road surface deformation and rutting formation are reduced. By enhancing the anti-deformation ability, the durability of the road surface is improved, the service life of the road surface is extended, and the frequency and cost of maintenance and repair are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the first embodiment of the present application;

[0013] Figure 2 It is a structural schematic diagram of the second embodiment of the present application;

[0014] Figure 3 It is a structural diagram of the third embodiment of the present application.

[0015] In the figure,

[0016] 2. Grassroots;

[0017] 3. Asphalt tack oil;

[0018] 4. Asphalt mixture layer; 41. Cement;

[0019] 5. Frame; 51. Main body; 52. Bolt;

[0020] 6. Rubber asphalt chip seal. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 3 As shown, a semi-flexible composite pavement structure includes: a base layer 2, an asphalt tack coat 3 and an asphalt mixture layer 4. The asphalt tack coat 3 is arranged between the base layer 2 and the asphalt mixture layer 4 and serves as a binder. The total void ratio of the asphalt mixture layer 4 is 19%-28%, the connected void ratio is 17%-26%, and the gaps in the asphalt mixture layer 4 are filled with cement 41.

[0023] In the present application, since cement 41 is filled in the asphalt mixture layer 4, the rutting resistance of the road surface is significantly improved, and the road surface deformation and rutting formation are reduced. By enhancing the anti-deformation ability, the durability of the road surface is improved, the service life of the road surface is extended, and the frequency and cost of maintenance and repair are reduced.

[0024] Specifically, the thickness of the asphalt mixture layer 4 is 8-12 cm.

[0025] The thickness of 8-12cm ensures the anti-rutting performance without excessively increasing the overall thickness of the road surface, thus maintaining the rationality of the road surface structure. The moderate thickness can better disperse the vehicle load, reduce the local stress concentration of the road surface, extend the service life of the road surface, and reduce the maintenance frequency and cost.

[0026] Specifically, the base layer 2 is an old road surface after milling or a newly built road surface.

[0027] Using the milled road surface as the base 2 effectively utilizes the old road surface material, reduces the generation of waste, and embodies the concept of environmental protection and resource recycling. New road surfaces can be built in places where there were no roads before.

[0028] Specifically, when cracks exist in the base layer 2 , a rubber asphalt chip seal 6 is provided between the base layer 2 and the asphalt tack coat 3 .

[0029] Rubber asphalt has good elasticity and ductility, and can effectively cover and seal cracks in the base layer 2 to prevent the cracks from extending to the upper asphalt mixture layer 4.

[0030] Specifically, it also includes a skeleton 5, which includes a main body 51 and a plurality of connecting parts connected to the main body 51. The main body 51 is a mesh structure, and the main body 51 is arranged in the asphalt mixture layer 4. The connecting part is a bolt 52, which is threadedly connected to the base layer 2, and the bolt 52 is welded to the main body 51.

[0031] Near the intersection, since trucks will stay for a long time waiting for red lights, a skeleton 5 is buried inside. The skeleton 5 enhances the strength of the semi-flexible composite pavement structure to prevent the collapse of the trucks due to long-term stay and the collapse of the road surface. During the construction process, bolts 52 can be driven into the base layer 2 in advance, and then the skeleton 5 is placed on it and connected with the bolts 52 by welding.

[0032] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship and movement status of the components in a certain specific posture, as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is that it includes three schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0035] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A semi-flexible composite pavement structure, characterized in that: include: A base layer (2), an asphalt tack coat (3) and an asphalt mixture layer (4), wherein the asphalt tack coat (3) is arranged between the base layer (2) and the asphalt mixture layer (4) and serves as a binder. The asphalt mixture layer (4) has a total void ratio of 19% to 28%, a connected void ratio of 17% to 26%, and the gaps in the asphalt mixture layer (4) are filled with cement (41).

2. The semi-flexible composite pavement structure according to claim 1, characterized in that: The thickness of the asphalt mixture layer (4) is 8-12 cm.

3. The semi-flexible composite pavement structure according to claim 1, characterized in that: The base layer (2) is an old road surface after milling or a newly built road surface.

4. The semi-flexible composite pavement structure according to claim 3, characterized in that: When cracks exist in the base layer (2), a rubber asphalt chip seal layer (6) is provided between the base layer (2) and the asphalt tack coat (3).

5. The semi-flexible composite pavement structure according to claim 1 or 4, characterized in that: The invention also comprises a skeleton (5), wherein the skeleton (5) comprises a main body (51) and a plurality of connecting parts connected to the main body (51), wherein the main body (51) is a mesh structure, and the main body (51) is arranged in the asphalt mixture layer (4), and the connecting parts are bolts (52), which are threadedly connected to the base layer (2), and the bolts (52) are welded to the main body (51).

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