CN211522704U

CN211522704U - White-to-black road surface structure

Info

Publication number: CN211522704U
Application number: CN202020025989.2U
Authority: CN
Inventors: 吉磊光; 蔡保福; 季坤; 赵连山; 菅影东; 苏振兴; 李杨; 刘莉; 王丹; 邵东伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2020-09-18
Anticipated expiration: 2030-01-07

Abstract

The utility model relates to a white black pavement structure of changing and white black pavement construction method of changing, including the old concrete foundation layer that pitch pavement layer and resonance that arrange from top to bottom were handled, old concrete foundation layer includes the cracked concrete of resonance metalling on upper portion and lower part and inlays the locking layer with the oblique, is filled with emulsified asphalt between each rubble on resonance metalling. The old concrete foundation layer is subjected to resonance treatment to form a resonance gravel layer and a concrete interlocking layer which are arranged up and down, emulsified asphalt is filled among the gravels of the resonance gravel layer, and the emulsified asphalt forms a lubricant and a binder among the gravels, so that the resonance gravel layer forms a flexible asphalt foundation layer, and when the asphalt pavement layer is paved, the thickness of the asphalt pavement layer can be properly reduced, and the pavement paving cost of changing white into black is reduced.

Description

White-to-black road surface structure

Technical Field

The invention relates to a white-to-black road surface structure in the field of road construction.

Background

The term "white to black" refers to the process of turning a white concrete pavement into a black asphalt pavement, and in recent years, resonance gravel is the main means for changing white to black. As disclosed in chinese patent publication No. CN108221539A, the resonant machine is used to perform resonant treatment on an old concrete pavement, and the crushed stones formed after resonant rubblization treatment of the concrete pavement form a structure with an upper part embedded and squeezed and a lower part obliquely embedded and locked, and the embedded and squeezed part is far away from the roadbed, the part of shoes towards the embedded and locked part is close to the roadbed, the resonant concrete pavement is also called as an old concrete foundation layer, and comprises an upper resonant crushed stone layer and a lower concrete embedded and locked layer with oblique cracks, and then an asphalt pavement layer is additionally laid on the upper side of the resonant crushed stone layer, thereby forming a new pavement structure.

After the resonance lithotripsy technology is used, an old concrete pavement forms a functional layer with a stable structure with an upper embedded and extruded part and a lower inclined embedded and locked part, the strength, the rigidity and the resilience modulus of the functional layer are higher than those of a graded gravel layer, and the concrete foundation layer and a lean concrete layer on the lower side are combined to form a rigid-flexible structural characteristic, the concrete embedded and locked layer can play a good vibration damping role, the strength of a raw cement slab is utilized to the maximum degree, the reflection cracks of an asphalt pavement layer can be thoroughly eradicated, and the roadbed structure on the lower side of the concrete foundation layer can not be influenced.

Therefore, the construction mode of changing white into black road surface by using the resonance macadam and the asphalt has the advantages of simple working procedure, capability of eradicating reflection cracks at one time, no slag and filler, long service life of the asphalt, no need of frequent renovation and the like. However, the following problems still exist in the road surface repairing construction in the prior art: the resonance rubble layer can not play what effectual effect in whole road surface structure, and in order to accord with structural design requirement, corresponding thickness need be laid to pitch road surface layer, and resonance rubble layer can not reasonable utilization, can increase the thickness of laying of pitch road surface layer undoubtedly to increase the cost of laying of pitch road surface layer.

Disclosure of Invention

The invention aims to provide a white-to-black pavement structure capable of reducing the paving thickness of an asphalt pavement layer.

In order to solve the technical problems, the technical scheme of the invention for changing the white into the black road surface structure is as follows:

the utility model provides a white black pavement structure that changes, includes the old concrete foundation layer that the pitch pavement layer and the resonance that arrange from top to bottom were handled, and old concrete foundation layer includes the cracked concrete of resonance metalling and the lower part that has on upper portion and inlays the locking layer, is filled with emulsified asphalt between each rubble on resonance metalling.

The thickness of the resonance gravel layer is 1/4-1/3 of the old concrete base layer.

And a rice stone leveling layer is paved between the resonance gravel layer and the asphalt pavement layer.

The asphalt pavement layer has the following three forms, namely, the first form is that the asphalt pavement layer has a one-layer structure; secondly, the asphalt pavement layer is composed of a surface layer and a lower layer which are arranged up and down; thirdly, the asphalt pavement layer is composed of a surface layer, a middle layer and a lower layer which are arranged up and down.

The technical scheme of the construction method for changing white into black pavement comprises the following steps:

the invention has the beneficial effects that: according to the invention, after the old concrete base layer is subjected to resonance treatment, the resonance gravel layer and the concrete interlocking layer which are arranged up and down are formed, emulsified asphalt is filled among the gravels of the resonance gravel layer, and the emulsified asphalt forms a lubricant and a binder among the gravels, so that the resonance gravel layer forms a flexible asphalt base layer, and thus when an asphalt pavement layer is laid, the thickness of the asphalt pavement layer can be properly reduced, and the pavement laying cost of changing white into black is reduced.

Drawings

FIG. 1 is a schematic block diagram of one embodiment of the present invention;

fig. 2 is a schematic view of the structure of the layer of the resonance crushed stone in fig. 1.

Detailed Description

An embodiment of a white-to-black road surface structure is shown in fig. 1-2: comprises an asphalt pavement layer 1 and an old concrete foundation layer which are arranged up and down and are treated by resonance, wherein the lower side of the old concrete foundation layer is a roadbed 5. The old concrete foundation layer is composed of an upper resonance gravel layer 3 and a lower concrete interlocking layer 4 with an oblique crack, and the resonance treatment of the old concrete foundation layer belongs to the prior art and is not described in detail herein.

Emulsified asphalt 8 is filled among the broken stones 7 of the resonance gravel layer in a pouring mode, the broken stones 7 of the resonance gravel layer and the emulsified asphalt 8 among the broken stones form a flexible asphalt base layer, and the particle size of each broken stone of the resonance gravel layer is smaller than 5 cm. The upside of resonance rubble layer has been laid rice stone screed-coat 2, and the upside of rice stone screed-coat is laid to the pitch pavement layer, also has emulsified asphalt between each rice stone of rice stone screed-coat 2, between rice stone screed-coat and resonance rubble layer and rice stone screed-coat and pitch pavement layer. In this embodiment, the asphalt pavement layer is a layer structure, and its thickness is 3~5cm, comprises SMA pitch mastic rubble mixture, has antiskid, wear-resisting and prevention of seepage and permeates the effect. The thickness of the resonant gravel layer is 1/4 of the thickness of the old concrete base layer.

Emulsified asphalt between the resonance gravel layers can also permeate into the oblique cracks of the concrete interlocking layer, so that rainwater is prevented from scouring the roadbed through the oblique cracks to cause settlement displacement of the concrete interlocking layer, the concrete interlocking layer has certain strength and serves as a semi-rigid base layer, and the emulsified asphalt layer is also arranged between the resonance gravel layers and the concrete interlocking layer. The resonance gravel layer and the emulsified asphalt between the gravels form a flexible asphalt base layer together, so that the asphalt pavement layer can be thinner, and the asphalt laying cost of changing white into black is greatly saved.

In other embodiments of the invention, the thickness of the resonant gravel layer may also be 1/3 for the old concrete foundation layer; the rice stone leveling layer can be omitted; the asphalt pavement layer can also be of a two-layer structure and comprises a surface layer on the upper side and a lower surface layer on the lower side, wherein the surface layer is formed by an SMA asphalt mastic macadam mixture, the thickness of the SMA asphalt mastic macadam mixture is 3-5 cm and is used for skid resistance, wear resistance and seepage prevention, and the lower surface layer is formed by an AC dense framework type asphalt mixture or an ATB dense-graded asphalt macadam mixture, the thickness of the AC dense framework type asphalt mixture or the ATB dense-graded asphalt macadam mixture is 6-15 cm, so; certainly, the asphalt pavement layer can also be of a three-layer structure and comprises a surface layer on the upper side, a middle surface layer in the middle and a lower surface layer on the lower side, wherein the surface layer is formed by an SMA asphalt mastic macadam mixture, has the thickness of 3-5 cm, and has the functions of skid resistance, wear resistance and seepage prevention; the middle surface layer is made of an AC dense framework type asphalt mixture, is 4-6 cm thick, and has high stability and seepage-proofing performance; the lower surface layer is composed of an ATB dense-graded asphalt macadam mixture, is 6-15 cm thick, and has high stability and bearing capacity.

The construction method of the white-to-black pavement comprises the following steps that firstly, an old concrete foundation layer is subjected to resonance treatment, and the old concrete foundation layer subjected to resonance treatment forms a resonance gravel layer 3 and a concrete interlocking layer 4 with an inclined crack 6, wherein the resonance gravel layer 3 and the concrete interlocking layer are arranged up and down; secondly, filling emulsified asphalt 8 among the crushed stones of the resonance crushed stone layer, wherein the emulsified asphalt 8 is filled among the crushed stones 7 of the resonance crushed stone layer; and thirdly, paving an asphalt pavement layer 1.

Preferably, in the second step, the emulsified asphalt is poured between the crushed stones of the resonance crushed stone layer from top to bottom by spraying the emulsified asphalt on the upper surface of the resonance crushed stone layer.

Preferably, in the third step, the resonant gravel layer is compacted before the asphalt pavement layer is laid. In the process of compacting the resonance gravel layer, the emulsified asphalt between the gravels plays a role in lubrication so as to conveniently adjust the positions of the gravels, thereby ensuring that the resonance gravel layer and the emulsified asphalt can form an asphalt structure layer together.

Preferably, before the asphalt pavement layer is laid, rice stones are laid on the upper surface of the resonance gravel layer, the rice stones are vibrated and compacted through road pressing equipment to form a rice stone leveling layer 2, emulsified asphalt is sprayed on the upper surfaces of the rice stones and the rice stones, and then the asphalt pavement is laid. In another embodiment of the present invention, when filling the emulsified asphalt between the crushed stone of the resonant crushed stone layer, the emulsified asphalt may be poured into the resonant crushed stone layer from the side of the resonant crushed stone layer without spraying the emulsified asphalt on the surface of the resonant crushed stone layer, so that the emulsified asphalt fills the gap between the crushed stone.

Claims

1. The utility model provides a white black pavement structure that changes, includes the old concrete foundation layer that pitch pavement layer and resonance that arrange from top to bottom were handled, its characterized in that: the old concrete foundation layer comprises a resonance gravel layer on the upper portion and a concrete interlocking layer with an oblique crack on the lower portion, and emulsified asphalt is filled among all the gravel of the resonance gravel layer.

2. The white-to-black road surface structure according to claim 1, wherein: the thickness of the resonance gravel layer is 1/4-1/3 of the old concrete base layer.

3. The white-to-black road surface structure according to claim 1, wherein: and a rice stone leveling layer is paved between the resonance gravel layer and the asphalt pavement layer.

4. The white-to-black road surface structure according to claim 1, wherein: the asphalt pavement layer has the following three forms, namely, the first form is that the asphalt pavement layer has a one-layer structure; secondly, the asphalt pavement layer is composed of a surface layer and a lower layer which are arranged up and down; thirdly, the asphalt pavement layer is composed of a surface layer, a middle layer and a lower layer which are arranged up and down.