Cold patch asphalt mixture pit slot repairing structure

Abstract

The utility model discloses a cold patch asphalt mixture pit slot repairing structure which comprises an original pavement foundation pit, a pit slot main body is arranged on the outer side of the original pavement foundation pit, the interior of the pit slot main body is in a frustum shape, a step is arranged at the edge of the pit slot main body, and a foundation pit processing layer, a bonding layer and a water curing cold patch asphalt mixture layer are laid in the pit slot main body from bottom to top. According to the utility model, the pit slot is excavated into the prismatic table step shape, so that the contact area between the pit slot main body and the bonding layer and the contact area between the pit slot main body and the water-curing cold patch asphalt mixture layer are increased, the cohesiveness between layers is enhanced, and the overall stability and the anti-shearing capability of the repairing structure are improved, thereby ensuring that the repaired pavement has good use performance and longer service life; by arranging the foundation pit treatment layer, a rough surface formed during digging of the pit groove is subjected to smoothing treatment, and bonding between the bonding layer and the original road surface and between the bonding layer and the water-cured cold patch asphalt mixture layer is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to bituminous pavement maintenance technical field, specifically, relate to a cold patch asphalt mixture pit groove repair structure. BACKGROUND

[0002] The bituminous pavement is in long -term use, because rain and water erosion and vehicle repeated rolling, prone to aging, damage and crack and so on disease. Among them, pit groove disease is most prominent, if not timely repair, pit groove area gradually expands, leading to road flatness reduction, influence driving comfort and service life. In order to improve road use quality and ensure traffic safety, need to repair pit groove in time.

[0003] Chinese patent publication No. CN105568834A one kind is used for repairing asphalt pavement and the method for repairing asphalt pavement, adopts asphalt repair patch, directly covers pit groove, realizes road rapid repair, and process is simple, and Chinese patent publication No. CN214992802U proposes a repair structure, introduces geogrid layer and nail, and the stability and durability of repair layer are enhanced by installing nail.

[0004] However, these pit groove repair structures still have some problems. First, when covering pit groove with repair patch, the adhesion of repair patch is greatly affected by temperature. Under high temperature or low temperature conditions, repair patch may fall off, thereby limiting its application range. Second, although installing nails can enhance the stability of the repair layer, it also increases the construction difficulty and time cost, and this method is only suitable for medium-deep pit groove, and the repair effect for shallow pit groove is not good.

[0005] For the problems in the related art, no effective solution has been proposed so far. UTILITY MODEL CONTENT

[0006] In view of the problems in the related art, the utility model provides a cold patch asphalt mixture pit groove repair structure to overcome the above technical problems existing in the prior art.

[0007] Therefore, the utility model adopts the specific technical scheme as follows:

[0008] A cold patch asphalt mixture pit groove repair structure, comprising a original road base pit, a pit groove main body is arranged outside the original road base pit, the pit groove main body is in the shape of a prism inside, a ladder is arranged at the edge of the pit groove main body, and a base pit treatment layer, a bonding layer and a water-solidified cold patch asphalt mixture layer are arranged in the pit groove main body from bottom to top.

[0009] Further, in order to prevent peeling and damage at the edge of the repair area and ensure driving safety, the outer edge of the pit groove main body exceeds the original road base pit by 1-2 cm.

[0010] Further, the base pit treatment layer is made of a mixture of cement emulsified asphalt mortar, emulsified asphalt and epoxy mortar.

[0011] Further, the thickness of the base pit treatment layer is 1-2 mm.

[0012] Further, the adhesive layer is made of a mixture of acrylate composite emulsion, polyvinyl acetate composite emulsion and polyurethane composite emulsion.

[0013] Further, in order to ensure that the adhesive layer is in full contact with the water-cured cold patch asphalt mixture layer, the adhesive layer has three layers, and the thickness is 1-3 mm.

[0014] Further, the water-cured cold patch asphalt mixture layer is made of isocyanate / polyether composite modified water-cured cold patch asphalt mixture.

[0015] Further, the top end height of the water-cured cold patch asphalt mixture layer is 1-2 cm higher than the top surface of the road surface around the pit groove main body.

[0016] Further, the height of the ladder side and the width of the front face are in a proportional relationship with the height and width of the pit groove main body.

[0017] Further, the ladder side is perpendicular to the road surface, and the ladder front face is parallel to the road surface.

[0018] The beneficial effects of the utility model are as follows:

[0019] (1) By digging the pit groove into a prism step ladder shape, the contact area between the pit groove main body and the adhesive layer and the water-cured cold patch asphalt mixture layer is increased, the adhesion between the layers is enhanced, the overall stability and shear resistance of the repaired structure are improved, and thus the repaired road surface has good use performance and a long service life.

[0020] (2) By setting the base pit treatment layer, the rough surface formed during the excavation of the pit groove is smoothed, which facilitates the adhesion between the adhesive layer and the original road surface and the water-cured cold patch asphalt mixture layer. In addition, by setting the adhesive layer, the water-cured cold patch material is bonded with the original road surface to form a whole, preventing the loosening and cracking of the repaired pit groove, and eliminating the need for repeated repair. Moreover, this repair method has lower requirements for humidity and temperature, and is not affected by weather and environmental temperature. This makes the repair method have wider applicability, and can be used in various climate conditions to ensure the timely repair and normal use of the road surface. BRIEF DESCRIPTION OF DRAWINGS

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Fig. 1 This is a diagram of the main structure of a cold-patch asphalt mixture pothole repair structure according to an embodiment of the present utility model;

[0023] Fig. 2 This is a structural diagram of a cold-patch asphalt mixture for pothole repair according to an embodiment of the present utility model.

[0024] In the picture:

[0025] 1. Original road surface pit; 2. Pit body; 3. Steps; 4. Pit treatment layer; 5. Bonding layer; 6. Water-cured cold patch asphalt mixture layer. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] According to an embodiment of the present invention, a cold-patch asphalt mixture pothole repair structure is provided.

[0028] Example 1

[0029] like Figs. 1-2 As shown, the cold patch asphalt mixture pothole repair structure according to the embodiment of this utility model includes an original roadbed pit 1, a pothole body 2 is provided on the outside of the original roadbed pit 1, the inside of the pothole body 2 is frustoconical, a step 3 is provided at the edge of the pothole body 2, and a pothole treatment layer 4, an adhesive layer 5, and a water-cured cold patch asphalt mixture layer 6 are laid from bottom to top inside the pothole body 2.

[0030] In this embodiment, a cutting machine is used to cut the potholes on the road surface in directions parallel and perpendicular to the centerline of the road, so that the original road surface pit 1 is formed as a whole into a truncated pyramidal pit body 2 that is wider at the top and narrower at the bottom. The side of the step 3 needs to be perpendicular to the road surface, and the front of the step 3 needs to be parallel to the road surface. The side and front surfaces are rough. The side height and front width are determined according to the size of the pit. The outer edge of the pit body 2 needs to extend 1-2 cm beyond the original road surface pit.

[0031] In the embodiment, the material of the foundation pit treatment layer 4 is a mixture of cement emulsified asphalt mortar, emulsified asphalt and epoxy mortar, which is coated on the bottom surface and the sidewall of the pit main body 2 by a scraper to smooth the rough surface and has a thickness of 1-2 mm.

[0032] In the embodiment, the material of the bonding layer 5 is a mixed solution of acrylate composite emulsion, polyvinyl acetate composite emulsion and polyurethane composite emulsion, which is sprayed on the side surface and the bottom surface for three times, has a thickness of 1-3 mm and good adhesion, and can improve the overall strength of the pit repair structure.

[0033] In the embodiment, the water-solidified cold patch asphalt mixture 6 is an isocyanate / polyether composite modified water-solidified cold patch asphalt mixture, and the thickness needs to be determined according to the actual depth of the pit main body 2, but when the pit main body 2 is filled, the water-solidified cold patch asphalt mixture layer 6 needs to be at least 2 cm higher than the surrounding road surface top surface to ensure that the water-solidified cold patch asphalt mixture layer 6 reaches the best compaction degree after compaction.

[0034] In order to facilitate the understanding of the above technical solutions of the utility model, the working principle or operation mode of the utility model in the actual process is described in detail below.

[0035] In actual application, the position of the original road surface foundation pit 1, the boundary and the depth of the original road surface foundation pit 1 are determined, and the contour line parallel or perpendicular to the road center line is drawn at a distance of 1-2 cm from the boundary for excavation, and the loose and old materials at the bottom of the original road surface are removed, and the pit is cut into a "prism" ladder shape by a cutting machine, the pit main body 2 is formed, the ladder 3 side surface is perpendicular to the road surface, the ladder 3 front surface is parallel to the road surface, the side surface and the front surface are rough surfaces, and the bottom is flat; then the cement emulsified asphalt mortar is coated on the pit bottom surface and the ladder front and side surfaces for two times, and after standing for 30 minutes, the 1-2 mm foundation pit treatment layer 4 is formed on the bottom surface and the side surface of the pit main body 2 to smooth the rough surface of the pit main body 2; then the polyvinyl acetate composite emulsion is sprayed on the surface of the foundation pit treatment layer 4 for three times, and after standing for 30 minutes, the 1-3 mm bonding layer 5 is formed on the bottom surface and the side surface of the foundation pit treatment layer 4; finally, the water-solidified cold patch asphalt mixture prepared in advance is spread on the bonding layer, the pit is filled to form an arc shape with the center being high and the periphery being low, until the center is about 2 cm higher than the surrounding road surface top surface, and after spraying water with a quality of about 2-3% of the cold patch asphalt mixture, the small machine is rolled. The pit repair structure is convenient to construct, has high construction efficiency, the cold patch asphalt mixture used is not affected by the weather, can be quickly solidified to form strength under the action of water, and ensures timely repair and normal use of the road surface.

[0036] The above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A cold-patch asphalt mixture pothole repair structure, characterized in that, The original road surface pit (1) is provided with a pit body (2) on the outside of the original road surface pit (1). The pit body (2) is shaped like a frustum inside. A step (3) is provided at the edge of the pit body (2). The pit body (2) is provided with a pit treatment layer (4), an adhesive layer (5), and a water-cured cold patch asphalt mixture layer (6) from bottom to top inside the pit body (2).

2. The cold-patch asphalt mixture pothole repair structure according to claim 1, characterized in that, The outer edge of the main body of the pit (2) extends 1-2 cm beyond the original road surface pit (1).

3. The cold-patch asphalt mixture pothole repair structure according to claim 1, characterized in that, The thickness of the foundation pit treatment layer (4) is 1-2 mm.

4. The cold-patch asphalt mixture pothole repair structure according to claim 1, characterized in that, The adhesive layer (5) consists of three layers with a thickness of 1-3 mm.

5. A cold-patch asphalt mixture pothole repair structure according to claim 1, characterized in that, The top of the water-cured cold patch asphalt mixture layer (6) is 1-2 cm higher than the top surface of the road surface surrounding the pothole body (2).

6. The cold-patch asphalt mixture pothole repair structure according to claim 1, characterized in that, The side height and front width of the step (3) are proportional to the height and width of the pit body (2).

7. The cold-patch asphalt mixture pothole repair structure according to claim 6, characterized in that, The side of the step (3) is perpendicular to the road surface, and the front of the step (3) is parallel to the road surface.

8. The cold-patch asphalt mixture pothole repair structure according to claim 7, characterized in that, The sides and front surfaces of the step (3) are both rough.

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