Cold mixing ultrathin pavement structure

Abstract

The utility model provides a cold mixing ultrathin pavement structure, which comprises a base layer, a middle layer and a surface layer which are sequentially stacked at a pavement damage pit from bottom to top, the base layer and the middle layer are positioned in the damage pit, and the outer edge of the surface layer is lapped on the pavement at the periphery of the damage pit; wherein the surface layer is thinner than the middle layer and the base layer. The utility model solves the problem that the joint between the repaired part and the original road surface is easy to crack again in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of pavement damage repair structures, and particularly relates to a cold-mix ultra-thin pavement structure. Background Art

[0002] After a paved road surface has been used for a period of time, it is prone to damage and potholes, so repair is required. In the prior art, in order to ensure that the repaired road surface reaches the original use effect, generally, the potholes at the damaged positions are manually enlarged, and then repair and filling are carried out. When actually carrying out repair and filling, a small mixer device can be used. The mixer is towed by an engineering vehicle to the place where repair is needed, and then on-site mixing operation is carried out to obtain cold-mix paving material (such as the emulsified asphalt mixture used in the prior art with the publication number CN214939116U), and then repair and filling are carried out, and finally the repair is completed after compaction. However, after a period of use, the part where the repaired road surface is connected to the top layer of the original road surface may crack due to long-term rolling, that is, cracks are likely to appear during use, and then the outer edge of the repaired part is damaged again, facing the trouble of secondary repair. Summary of the Utility Model

[0003] Aiming at the deficiencies in the prior art, the utility model provides a cold-mix ultra-thin pavement structure, which solves the problem that cracks are likely to appear again at the connection between the repaired part and the original road surface in the prior art.

[0004] According to an embodiment of the utility model, a cold-mix ultra-thin pavement structure includes a base layer, an intermediate layer, and a surface layer that are sequentially stacked from bottom to top at a pavement pothole, and the base layer and the intermediate layer are located in the pothole, and the outer edge of the surface layer is placed on the road surface outside the pothole; wherein the thickness of the surface layer is less than that of the intermediate layer and the base layer.

[0005] In the above embodiment, the surface layer has the smallest thickness, and the outer edge part is placed on the road surface outside the pothole. In this way, the relationship between the surface layer and the original road surface is an up-and-down structure, and it is not easy for cracks to appear again between the two, so the service life is longer, and the problem that cracks are likely to appear again at the connection between the repaired part and the original road surface in the prior art is solved.

[0006] Further, the base layer further includes a plurality of columnar first extension parts extending downward.

[0007] Further, the intermediate layer further includes a plurality of columnar second extension parts extending downward into the base layer.

[0008] Further, the second extension parts and the first extension parts are arranged staggeredly.

[0009] Further, a sinking platform is provided on the outer peripheral surface of the damaged pit in a sunken manner, and the outer edge of the surface layer is lapped on the sinking platform.

[0010] Further, a number of small holes are recessed on the top surface of the intermediate layer, and a number of protrusions are provided on the bottom surface of the surface layer to fit into the small holes.

[0011] Further, a protrusion is provided between the sinking platform and the surface layer.

[0012] Further, the top surface of the surface layer is flush with the top surface of the road surface.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] By providing a multi-layer structure and lapping the outer edge of the surface layer on the road surface at the outer edge of the damaged pit, a relationship of upper and lower structures is formed between the surface layer and the original road surface, and it is not easy to appear cracks again between the two, so the service life is longer, and the problem that cracks are likely to appear again at the joint between the repaired part and the original road surface in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view structural schematic diagram of a road surface damaged pit of an embodiment of the utility model;

[0016] Figure 2 It is a general structural schematic diagram of an embodiment of the utility model;

[0017] Figure 3 For Figure 2 a partial structural enlarged schematic diagram at A in

[0018] In the above-mentioned drawings:

[0019] road surface 1, damaged pit 2, base layer 3, intermediate layer 4, surface layer 5, first extension part 6, second extension part 7, sinking platform 8, protrusion 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the utility model will be further described below with reference to the drawings and embodiments.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] In an exemplary embodiment, as Figures 1-3 shown, this embodiment provides a cold-mix ultra-thin pavement structure, which includes a base layer 3, an intermediate layer 4, and a surface layer 5 that are sequentially stacked from bottom to top at the damaged pit 2 of the road surface 1, and the base layer 3 and the intermediate layer 4 are located within the damaged pit 2, and the outer edge of the surface layer 5 is placed on the road surface 1 outside the damaged pit; wherein the thickness of the surface layer 5 is less than that of the intermediate layer 4 and the base layer 3. Specifically, the surface layer 5 is made of cold-mix paving material, referring to the emulsified asphalt mixture used in the prior art with the reference publication number CN214939116U, while the base layer 3 and the intermediate layer 4 can be concrete material and medium-sized asphalt mixture, or other similar materials in other prior arts can also be used.

[0023] In the above embodiment, the surface layer 5 has the smallest thickness, and the outer edge part is placed on the road surface 1 outside the damaged pit 2. In this way, the surface layer 5 and the original road surface 1 are in an up-and-down structural relationship, and it is not easy for cracks to appear again between the two, so the service life is longer, solving the problem that cracks are likely to appear again at the joint between the repaired part and the original road surface 1 in the prior art; more specifically, the base layer 3 further includes a plurality of columnar first extension parts 6 extending downward. During construction, a plurality of downward holes are drilled in the damaged pit 2 first, and then the base layer 3 material is paved, so that the base layer 3 material enters the drilled holes to form a plurality of first extension parts 6, which can make the base layer 3 and the bottom layer of the original road surface 1 combine more tightly and make the overall structure more stable. Furthermore, after the base layer 3 solidifies, a plurality of holes staggered from the previous holes can also be drilled downward, and then the intermediate layer 4 is paved, that is, a plurality of second extension parts 7 extending downward into the base layer 3 and staggered from the first extension parts 6 are formed. The first extension parts 6 and the second extension parts 7 are both columnar structures, jointly making the repaired structure more stable.

[0024] As Figures 1-3As shown, a sinking platform 8 is provided with a sunken outer peripheral surface of the damaged pit 2, and the outer edge of the surface layer 5 is lapped on the sinking platform 8, so that the top surface of the surface layer 5 and the top surface of the original road surface 1 are in the same plane after the surface layer 5 is paved, and the overall road surface 1 will not be uneven due to repair; more specifically, before paving the surface layer 5, the surface of the sinking platform 8 and the intermediate layer 4 can be roughened to form a plurality of small holes that are recessed downward, and then paving is carried out, so that a number of protrusions 9 can be formed between the surface layer 5 and the intermediate layer 4 and between the surface layer 5 and the sinking platform 8, making the connection between the surface layer 5 and the underlying sinking platform 8 and the intermediate layer 4 tighter and the overall repair structure more stable.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A cold-mix ultra-thin pavement structure, characterized in that, It includes a damaged pit located on the road surface, and also includes a base layer, an intermediate layer, and a surface layer that are sequentially stacked from bottom to top at the damaged pit of the road surface. The base layer and the intermediate layer are located within the damaged pit, and the outer edge of the surface layer is lapped on the road surface outside the damaged pit. Among them, the thickness of the surface layer is less than that of the intermediate layer and the base layer. The base layer further includes a plurality of columnar first extension parts extending downward.

2. The cold-mix ultra-thin pavement structure according to claim 1, characterized in that The intermediate layer further includes a plurality of columnar second extension parts extending downward into the base layer.

3. The cold-mix ultra-thin pavement structure according to claim 2, characterized in that, The second extension parts and the first extension parts are arranged staggeredly.

4. The cold-mix ultra-thin pavement structure according to any one of claims 1 to 3, characterized in that, A sinking platform is provided by sinking the outer peripheral surface of the damaged pit, and the outer edge of the surface layer is lapped on the sinking platform.

5. The cold-mix ultra-thin pavement structure according to claim 4, wherein A number of small holes are recessed on the top surface of the intermediate layer, and a number of protrusions that fit into the small holes are provided on the bottom surface of the surface layer.

6. The cold-mix ultra-thin pavement structure according to claim 5, characterized in that, The protrusions are provided between the sinking platform and the surface layer.

7. The cold-mix ultra-thin pavement structure according to claim 4, wherein The top surface of the surface layer is flush with the top surface of the road surface.

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