CN210085968U - Anti-shearing and anti-cracking structure between composite pavement layers - Google Patents
Anti-shearing and anti-cracking structure between composite pavement layers Download PDFInfo
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- CN210085968U CN210085968U CN201920557760.0U CN201920557760U CN210085968U CN 210085968 U CN210085968 U CN 210085968U CN 201920557760 U CN201920557760 U CN 201920557760U CN 210085968 U CN210085968 U CN 210085968U
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Abstract
The utility model relates to a crack control structure that shears between combined type road surface layer, including the surface through milling the continuous arrangement of reinforcement concrete layer that naked processing was milled, spill cloth in the pitch membrane on continuous arrangement of reinforcement concrete layer surface, spread single particle diameter metalling on the pitch membrane, spread the pitch concrete layer on the metalling. The surface of the continuous reinforced concrete of the utility model is milled and planed, is better bonded with the scattered hot asphalt, is better embedded and extruded with the scattered gravels, and is embedded and extruded with the bottom of the asphalt concrete layer above the gravels; the interlayer shear-resistant anti-cracking structure is used as a transition functional layer to bond two materials with larger modulus difference into a whole, so that the two materials are interlaminated continuously, the interlaminar stress condition is improved, the interlaminar shear-resistant capability is improved, and the shear-push deformation of an asphalt surface layer is effectively prevented; the distributed asphalt film has better deformation self-healing capability, can absorb and dissipate the stress of upward diffusion of the surface crack of the continuous reinforced concrete plate, and effectively prevents crack propagation and upward reflection.
Description
Technical Field
The utility model relates to a highway, urban road pavement design and construction technical field, concretely relates to anti-cracking structure that shears between layer of continuous reinforced concrete and asphalt concrete combined type road surface.
Background
The composite pavement is a pavement with a surface layer formed by compounding two structural layers with different material types and mechanical properties. Common structures include the compounding of ordinary concrete, roller compacted concrete, lean concrete or continuous reinforced concrete with an asphalt concrete surface layer. The continuous reinforced concrete has better flatness and higher strength because of the configuration of longitudinal continuous reinforcing steel bars and no transverse shrinkage joints, and has great advantages when being combined with asphalt concrete to form a composite pavement. The high-strength continuous reinforced concrete slab serving as the rigid base layer improves the bearing capacity of the asphalt pavement and meets the requirements of load conditions such as heavy load, overload, large traffic volume and the like; the asphalt concrete surface layer improves and enhances the use quality of the surface of the concrete pavement, meets the requirement of high-speed running performance of the automobile, and is convenient to maintain. The continuous reinforced concrete and asphalt concrete composite pavement can fully meet the requirements of durability and comfort of a pavement structure under heavy-load traffic conditions, and is one of main structural forms of long-service-life pavements under the current environment and conditions in China.
The continuous reinforced concrete and the asphalt concrete have different material characteristics, larger modulus difference and poor deformation coordination, so that under the action of high temperature and vehicle load, the stiffness modulus of the asphalt material is reduced, the cohesive force is reduced, the shear strength is reduced, and the asphalt layer, particularly the interlayer junction surface is easy to have the defects of slippage, cracking, deformation and the like caused by insufficient shear resistance. Receive factors such as temperature shrinkage, load effect to influence continuous reinforced concrete surface and a lot of microcracks can appear, and usually for running through the crack, set up vertical continuous reinforcing bar for interval and width that the control crack produced, can upwards reflect when crack width crescent, lead to the pitch surface course of corresponding position to appear the crack, can further accelerate the destruction of road surface structure after the rainwater gets into. Therefore, in order to ensure the long-term service performance of the pavement, the shearing resistance and the crack prevention treatment need to be carried out between the continuous reinforced concrete and asphalt concrete composite pavement layers.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at to join together the state between continuous reinforced concrete and asphalt concrete combined type road surface layer, anti waterproof improvement that splits, provide one kind and be applied to the crack control structure that shears between continuous reinforced concrete and asphalt concrete combined type road surface layer, fully prolong combined type road surface life.
The utility model discloses a solve the technical scheme that technical problem that the aforesaid provided adopted and be:
a composite pavement interlayer shear-resistant anti-cracking structure comprises a continuous reinforced concrete layer, an asphalt membrane, a single-particle-size gravel layer and an asphalt concrete layer, wherein the surface of the continuous reinforced concrete layer is subjected to milling and naked treatment, the asphalt membrane is distributed on the surface of the continuous reinforced concrete layer, the single-particle-size gravel layer is distributed on the asphalt membrane, and the asphalt concrete layer is paved on the gravel layer. The construction method of the structure comprises the following steps: milling and milling the surface of the continuous reinforced concrete to be naked, forming a rugged contact surface after exposing bones, cleaning milling materials by using a sweeper, blowing off surface dust by using high-pressure airflow of a blower, then spraying hot asphalt on the surface of the continuous reinforced concrete to form an asphalt film with a certain thickness, then spreading crushed stones with single particle size, and forming a shear-resistant and anti-cracking structure between the continuous reinforced concrete and the surface asphalt concrete after rolling and forming by using a rubber-tyred roller.
In the scheme, the continuous reinforced concrete layer forms an uneven contact surface after milling, the exposed bone rate of the contact surface is ensured to be 50% -75%, and the roughness is controlled to be 0.5-1.0 mm.
In the scheme, the asphalt film is formed by spraying hot asphalt on the surface of the continuous reinforced concrete layer, fully permeating the formed micro cracks on the surface of the continuous reinforced concrete, and forming the asphalt film with the thickness of 1.5-2.0 mm on the surface of the continuous reinforced concrete.
In the scheme, the hot asphalt adopts rubber asphalt, SBS modified asphalt or high-viscosity modified asphalt, and the spreading amount is 1.6-2.0 kg/m2。
In the scheme, the spreading amount of the crushed stone layer is controlled to be 60-70% of the surface coverage rate.
In the scheme, the particle size of the crushed stone layer is selected according to the design thickness of the anti-shearing and anti-cracking layer, when the design thickness of the anti-shearing and anti-cracking layer is 0.6cm, the particle size of the crushed stone is 3-5 mm, and when the design thickness of the anti-shearing and anti-cracking layer is 1cm, the particle size of the crushed stone is 9.5-13.2 mm.
The beneficial effects of the utility model reside in that:
(1) the surface of the continuous reinforced concrete is milled and planed to remove a laitance layer on the surface of the concrete, a rugged contact surface is formed after bone exposure, the concrete is better bonded with the scattered hot asphalt and better embedded and extruded with the scattered gravels, and the gravel layer is embedded and extruded with the bottom of the asphalt concrete layer above the gravel layer;
(2) the interlayer shear-resistant anti-cracking structure is used as a transition functional layer to bond two materials with larger modulus difference into a whole, so that the two materials are interlaminated continuously, the interlaminar stress condition is improved, the interlaminar shear-resistant capability is improved, and the shear-push deformation of an asphalt surface layer is effectively prevented;
(3) the distributed hot asphalt fully permeates into micro cracks formed on the surface of the continuous reinforced concrete, and an asphalt film with a certain thickness is formed on the surface, the asphalt film has better deformation self-healing capacity, can absorb and dissipate stress of upward diffusion of cracks on the surface of the continuous reinforced concrete plate, has good crack sealing, water proofing and stress absorbing functions, and can effectively prevent crack expansion and upward reflection on the surface of the continuous reinforced concrete.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic diagram of the composite pavement interlayer shearing and cracking resistant structure of the utility model.
In the figure: 1. continuously reinforcing a concrete layer; 2. micro-cracking; 3. an asphalt film; 4. a crushed stone layer; 5. an asphalt concrete layer.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, for the composite pavement interlayer anti-shear and anti-cracking structure of the present invention, the structure comprises a continuous reinforced concrete layer 1 whose surface is milled and naked, an asphalt film 3 sprinkled on the surface of the continuous reinforced concrete layer 1, a single particle size gravel layer 4 sprinkled on the asphalt film 3, and an asphalt concrete layer 5 paved on the gravel layer 4. After the continuous reinforced concrete layer 1 is paved and maintained, a milling machine is used for milling the surface of the continuous reinforced concrete, the edge of the position which can not be milled is milled, a hand-push type small milling machine is used for supplementing milling, a laitance layer on the surface of the concrete is removed, a rugged contact surface is formed after exposed bones, the exposed bone rate of the contact surface is ensured to be 50% -75%, and the roughness is controlled to be 0.5-1.0 mm. And (3) spraying hot asphalt on the surface of the continuous reinforced concrete, fully permeating the micro cracks 2 formed on the surface of the continuous reinforced concrete, and forming an asphalt film 3 with the thickness of 1.5-2.0 mm on the surface of the continuous reinforced concrete. The hot asphalt can be rubber asphalt, SBS modified asphalt or high-viscosity modified asphalt, and the spreading amount is 1.6-2.0 kg/m2. And spreading the crushed stone with the single particle size immediately after the asphalt is spread, wherein the spreading amount is controlled according to the surface coverage rate of 60-70%, and the actual spreading amount of the asphalt and the actual spreading amount of the crushed stone can be determined through field tests. The particle size of the crushed stone is selected according to the design thickness of the anti-shearing and anti-cracking layer, when the design thickness of the anti-shearing and anti-cracking layer is 0.6cm, the particle size of the crushed stone is preferably 3-5 mm, and when the design thickness of the anti-shearing and anti-cracking layer is 1cm, the particle size of the crushed stone is preferably 9.5-13.2 mm. And (3) after the crushed stones are spread, closely rolling for 1-2 times by adopting a 9-16-ton rubber wheel road roller. And paving an asphalt concrete layer 5 after the shear-resistant and anti-cracking layer is formed to be strong. Through the steps, the utility model discloses continuous reinforced concrete and asphalt concrete are compoundShear-resistant and anti-cracking structure between combined road surface layers.
The utility model has the advantages of as follows: (1) the surface of the continuous reinforced concrete is milled and planed to remove a laitance layer on the surface of the concrete, a rugged contact surface is formed after bone exposure, the concrete is better bonded with the scattered hot asphalt and better embedded and extruded with the scattered gravels, and the gravel layer is embedded and extruded with the bottom of the asphalt concrete layer above the gravel layer; (2) the interlayer shear-resistant anti-cracking structure is used as a transition functional layer to bond two materials with larger modulus difference into a whole, so that the two materials are interlaminated continuously, the interlaminar stress condition is improved, the interlaminar shear-resistant capability is improved, and the shear-push deformation of an asphalt surface layer is effectively prevented; (3) the distributed hot asphalt fully permeates into micro cracks formed on the surface of the continuous reinforced concrete, and an asphalt film with a certain thickness is formed on the surface, the asphalt film has better deformation self-healing capacity, can absorb and dissipate stress of upward diffusion of cracks on the surface of the continuous reinforced concrete plate, has good crack sealing, water proofing and stress absorbing functions, and can effectively prevent crack expansion and upward reflection on the surface of the continuous reinforced concrete.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (6)
1. The composite pavement interlayer shear-resistant anti-cracking structure is characterized by comprising a continuous reinforced concrete layer, an asphalt membrane, a single-particle-size gravel layer and an asphalt concrete layer, wherein the surface of the continuous reinforced concrete layer is subjected to milling and naked treatment, the asphalt membrane is distributed on the surface of the continuous reinforced concrete layer, the single-particle-size gravel layer is distributed on the asphalt membrane, and the asphalt concrete layer is spread on the gravel layer.
2. The composite pavement interlayer shear-resistant and anti-cracking structure as claimed in claim 1, wherein the continuous reinforced concrete layer is milled to form a rugged contact surface, the contact surface ensures an exposed bone rate of 50-75%, and the roughness is controlled at 0.5-1.0 mm.
3. The composite pavement interlayer shear-resistant and anti-cracking structure according to claim 1, wherein the asphalt film is formed by spraying hot asphalt on the surface of the continuous reinforced concrete layer, fully penetrating into micro cracks formed on the surface of the continuous reinforced concrete, and forming the asphalt film with the thickness of 1.5-2.0 mm on the surface of the continuous reinforced concrete.
4. The composite pavement interlayer anti-shear and anti-cracking structure as claimed in claim 3, wherein the hot asphalt is rubber asphalt, SBS modified asphalt or high viscosity modified asphalt, and the spreading amount is 1.6-2.0 kg/m2。
5. The composite pavement interlayer shear-resistant and crack-resistant structure as claimed in claim 1, wherein the spreading amount of the gravel layer is controlled to a surface coverage of 60-70%.
6. The composite interlaminar shear-resistant and anti-cracking structure for pavements as claimed in claim 5, wherein the crushed stone in the crushed stone layer has a particle size of 3-5 mm when the shear-resistant and anti-cracking layer has a designed thickness of 0.6cm, and has a particle size of 9.5-13.2 mm when the shear-resistant and anti-cracking layer has a designed thickness of 1 cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920557760.0U CN210085968U (en) | 2019-04-23 | 2019-04-23 | Anti-shearing and anti-cracking structure between composite pavement layers |
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| CN201920557760.0U CN210085968U (en) | 2019-04-23 | 2019-04-23 | Anti-shearing and anti-cracking structure between composite pavement layers |
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| CN210085968U true CN210085968U (en) | 2020-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182595A (en) * | 2021-11-19 | 2022-03-15 | 山东省交通科学研究院 | Construction method of long-life asphalt road |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182595A (en) * | 2021-11-19 | 2022-03-15 | 山东省交通科学研究院 | Construction method of long-life asphalt road |
| CN114182595B (en) * | 2021-11-19 | 2023-08-11 | 山东省交通科学研究院 | Construction method of long-life asphalt road |
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Inventor after: Wang Yang Inventor after: Cheng Xiaoliang Inventor after: Zhao Qianwen Inventor after: Zhang Haojun Inventor before: Wang Yang Inventor before: Cheng Xiaoliang Inventor before: Zhao Qianwen |