Cold mixing drainage pavement structure

Abstract

The utility model provides a cold mixing drainage pavement structure which comprises a roadbed layer, a high-viscosity waterproof bonding layer and a cold mixing drainage layer, the high-viscosity waterproof bonding layer and the cold mixing drainage layer are sequentially stacked on the roadbed layer, and the cold mixing drainage layer comprises a gravel layer laid on the high-viscosity waterproof bonding layer. The cold mixing material bottom layer is interwoven with the rubble layer and is close to the high-viscosity waterproof bonding layer, the cold mixing material surface layer is interwoven with the rubble layer and is opposite to the high-viscosity waterproof bonding layer, and the top surface of the cold mixing material surface layer is higher than the rubble layer. The pavement structure solves the problem that the pavement structure in the prior art is poor in drainage performance.

Description

Technical Field

[0001] The utility model relates to the technical field of pavement structures, in particular to a cold-mix drainage pavement structure. Background Art

[0002] In a previous application, the applicant disclosed a high-adhesion water-based epoxy asphalt wearing layer pavement structure (authorization publication number CN 216404953 U), which includes a basic pavement structure layer, a wear layer is laid on the upper surface of the basic pavement structure layer, and the wear layer includes, from top to bottom, a toughened water-based epoxy emulsified asphalt layer, a high-viscosity bonding layer, and a silicone penetration layer. This utility model uses a water-based epoxy asphalt wearing layer that has been toughened and modified, together with a high-viscosity emulsified asphalt and an appropriate amount of cement, to provide the pavement structure with better bonding properties, improve the bonding properties between the toughened water-based epoxy emulsified asphalt layer and the original pavement, effectively improve the problem of asphalt becoming brittle and cracking after adding epoxy resin, and modify the high-temperature performance of the binder and its bonding properties with the aggregate; using a higher asphalt dosage while limiting the maximum nominal diameter of the mixture can effectively reduce road noise while ensuring anti-skid performance. However, after a period of actual use, it was found that the pavement structure still has the problem of poor drainage. Utility Model Content

[0003] In view of the deficiencies in the prior art, the present invention provides a cold-mix drainage pavement structure, which solves the problem of poor drainage in the prior art pavement structure.

[0004] According to an embodiment of the present utility model, a cold-mix drainage pavement structure includes a road base layer, and a high-viscosity waterproof bonding layer and a cold-mix drainage layer stacked in sequence above the road base layer, wherein the cold-mix drainage layer includes a gravel layer laid on the high-viscosity waterproof bonding layer, and a cold-mix base layer interwoven with the gravel layer and close to the high-viscosity waterproof bonding layer, and a cold-mix surface layer interwoven with the gravel layer and opposite to the high-viscosity waterproof bonding layer, and the top surface of the cold-mix surface layer is higher than the gravel layer.

[0005] In the above embodiment, the high-viscosity waterproof bonding layer is set between the upper and lower structures to prevent water from penetrating downward, and the cold-mix drainage layer is a composite interwoven structure, in which the gravel layer plays a skeleton support role, while providing gaps for the cold-mix bottom layer and the cold-mix surface layer to be set. There are tiny gaps in the overall cold-mix drainage layer for rainwater to penetrate downward, so that rainwater on the road surface can quickly penetrate downward and then be diverted laterally, thereby enhancing the drainage performance of the pavement structure and solving the problem of poor drainage of the pavement structure in the prior art.

[0006] Furthermore, the thickness of the cold mix drainage layer is 5-12 mm.

[0007] Furthermore, the density of the cold mix bottom layer is greater than the density of the cold mix top layer.

[0008] Furthermore, the thickness of the cold mix bottom layer is greater than the thickness of the cold mix surface layer.

[0009] Furthermore, a plurality of depressions are provided on the wall surface where the road base and the high-viscosity waterproof bonding layer meet, and the high-viscosity waterproof bonding layer extends into all the depressions.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The upper and lower layers of the pavement structure are separated by a high-viscosity waterproof bonding layer, and the cold-mix drainage layer is a composite interwoven structure, in which the crushed stone layer plays a skeleton support role, while providing gaps for the cold-mix bottom layer and cold-mix surface layer. There are tiny gaps in the overall cold-mix drainage layer for rainwater to penetrate downward, so that rainwater on the road surface can quickly penetrate downward and then be diverted laterally, thereby enhancing the drainage performance of the pavement structure and solving the problem of poor drainage of the pavement structure in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0013] Figure 2 for Figure 1 A magnified schematic diagram of the local structure at center A;

[0014] In the above drawings:

[0015] Road base layer 1, high viscosity waterproof bonding layer 2, cold mix drainage layer 3, crushed stone layer 4, cold mix base layer 5, cold mix surface layer 6, depression 7. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation to the present invention.

[0018] In an exemplary embodiment, Figure 1、 2 As shown, this embodiment provides a cold-mix drainage pavement structure, which includes a road base layer 1, and a high-viscosity waterproof bonding layer 2 and a cold-mix drainage layer 3 stacked in sequence on the road base layer 1, wherein the cold-mix drainage layer 3 includes a crushed stone layer 4 laid on the high-viscosity waterproof bonding layer 2, and a cold-mix base layer 5 interwoven with the crushed stone layer 4 and close to the high-viscosity waterproof bonding layer, and a cold-mix surface layer 6 interwoven with the crushed stone layer 4 and opposite to the high-viscosity waterproof bonding layer, and the top surface of the cold-mix surface layer 6 is higher than the crushed stone layer 4 to prevent the crushed stone from directly contacting the wheels.

[0019] In the above embodiment, the high-viscosity waterproof bonding layer 2 is provided to block between the upper and lower structures to prevent water from penetrating downward, and the cold-mix drainage layer 3 is provided as a composite interwoven structure, wherein the gravel layer 4 plays a role of skeleton support, while providing gaps for the cold-mix bottom layer 5 and the cold-mix surface layer 6 to be provided. There are tiny gaps in the overall cold-mix drainage layer 3 for rainwater to penetrate downward, thereby enabling rainwater on the road surface to penetrate downward quickly. Due to the obstruction of the high-viscosity waterproof bonding layer 2, water is diverted laterally, and drainage ditches are provided on both sides (or one side) of the pavement structure, thereby realizing the drainage function of the pavement structure, thereby enhancing the drainage performance of the pavement structure and solving the problem of poor drainage of the pavement structure in the prior art.

[0020] like Figure 1 、 2 As shown, in a further exemplary scheme, the high-viscosity waterproof bonding layer 2 adopts SBS modified high-viscosity emulsion, which can be constructed by spraying with a spreading amount of 0.3-0.6L / ㎡, which can effectively close the small cracks and pores in the asphalt pavement, prevent rainwater from seeping in, and make the basic structure layer and the high-viscosity waterproof bonding layer 2 have better bonding performance; further, a number of depressions 7 are provided on the wall surface where the road base layer 1 and the high-viscosity waterproof bonding layer 2 are connected, and the high-viscosity waterproof bonding layer 2 extends into all the depressions 7, which can enhance the bonding tightness between the two.

[0021] like Figure 1 、 2 As shown, in a more detailed exemplary scheme, the thickness of the cold mix drainage layer 3 is 5-12 mm, the density of the cold mix bottom layer 5 is greater than the density of the cold mix surface layer 6, and the thickness of the cold mix bottom layer 5 is greater than the thickness of the cold mix surface layer 6, so that water can penetrate downward faster, and then gradually reduce the downward flow rate and change to lateral flow; the gravel layer 4 used can be paved with basalt gravel with a particle size of 4-6 mm, and high-viscosity and high-elasticity modified emulsified asphalt is used as the cold mix material, which is filled into the gaps in the gravel layer 4, and is carried out twice. The first time forms the cold mix bottom layer 5, and the second time forms the cold mix surface layer 6, wherein the cold mix is ​​not heated during the processing, but is directly mixed by stirring.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A cold mix drainage pavement structure, characterized in that: It includes a road base layer, and a high-viscosity waterproof bonding layer and a cold-mix drainage layer stacked in sequence on the road base layer, wherein the cold-mix drainage layer includes a crushed stone layer laid on the high-viscosity waterproof bonding layer, a cold-mix bottom layer interwoven with the crushed stone layer and close to the high-viscosity waterproof bonding layer, and a cold-mix surface layer interwoven with the crushed stone layer and opposite to the high-viscosity waterproof bonding layer, and the top surface of the cold-mix surface layer is higher than the crushed stone layer.

2. The cold-mix drainage pavement structure according to claim 1, characterized in that: The thickness of the cold-mix drainage layer is 5-12 mm.

3. The cold-mix drainage pavement structure according to claim 1, characterized in that: The density of the cold mix bottom layer is greater than the density of the cold mix surface layer.

4. The cold-mix drainage pavement structure according to claim 1, wherein: The thickness of the cold mix bottom layer is greater than the thickness of the cold mix surface layer.

5. The cold-mix drainage pavement structure according to claim 1, characterized in that: A plurality of depressions are arranged on the wall surface where the road base layer and the high-viscosity waterproof bonding layer meet, and the high-viscosity waterproof bonding layer extends into all of the depressions.

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