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An asphalt pavement structure for heavy traffic

An asphalt pavement and traffic technology, applied in the field of asphalt pavement structure, can solve the problem of not fully understanding the structural stress characteristics and functional requirements of the structural layer to play a role, and achieve good bonding and waterproofing effect, good anti-skid performance, maintaining Long-lasting color effect

Active Publication Date: 2019-12-03
江苏一诺路桥工程检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the traditional asphalt pavement structure layer of expressway is set from bottom to top with ordinary asphalt lower layer, modified asphalt middle layer and modified asphalt upper layer. Different structural layers play different roles

Method used

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  • An asphalt pavement structure for heavy traffic

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Effect test

Embodiment 1

[0024] A gravel mining highway with two lanes in both directions and a width of 7.5m. It was originally an asphalt concrete pavement. Due to heavy loads, the asphalt pavement has severe rutting, large areas of potholes, and water damage that have destroyed the integrity of the base layer and needs to be remodeled. The proportion of large muck trucks with a total load of more than 120 tons in the traffic composition of this road accounts for about 90%. The axle load conversion is carried out according to the asphalt pavement, and the accumulated equivalent axle times within the design period of the lane are 9.0×108 times / lane. The overlay plan that can be used is: 4cm rubber modified asphalt mixture SMA-13+SBS modified emulsified asphalt+8cm high modulus rubber asphalt mixture HMAC-20+SBS modified emulsified asphalt+10cm high performance rubber asphalt concrete Sup -25+1cm rubber asphalt stress absorbing layer SAMI+32cm cement stabilized macadam base +16cm low dose cement stabil...

Embodiment 2

[0026] A newly built expressway with two-way four-lane, width 11.5m, design speed 120Km / h, the proportion of large trucks accounted for about 50% of the predicted traffic composition, according to the axle load conversion of the asphalt pavement, the cumulative equivalent axle times within the design period of the lane is 7.0 ×107 times / lane. The overlay plan that can be used is: 4cm rubber modified asphalt mixture SMA-13+SBS modified emulsified asphalt+6cm high modulus rubber asphalt mixture HMAC-20+SBS modified emulsified asphalt+8cm high performance rubber asphalt concrete Sup -25+1cm rubber asphalt stress absorbing layer SAMI+36cm cement stabilized macadam base +20cm low dose cement stabilized macadam. Among them, the rubber-modified asphalt used in the wear layer SMA-13 ​​has a softening point of 82°C, a ductility (5cm / min, 5°C) of 36cm, and a dynamic viscosity of 47266Pa.s at 60°C; the high-modulus rubber used in the load-bearing layer HMAC-20 The penetration of asphalt...

Embodiment 3

[0028] A third-level county road, two-way two-lane, with a road width of 8.5 meters and a design speed of 60Km / h. It is an important heavy-duty resource road in this area. A cement plant with an annual output of 3 million tons of clinker is distributed in this road section , 2 gravel processing plants with an annual output of more than 2 million tons and other industrial and mining processing enterprises. It was originally an asphalt concrete pavement. Due to the heavy load, the asphalt pavement has serious rutting, large areas of potholes, and water damage, which has destroyed the integrity of the base layer and needs to be remodeled. The proportion of large muck trucks with a total load of more than 120 tons in the traffic composition of this road accounts for about 70%. The axle load conversion is carried out according to the asphalt pavement, and the cumulative equivalent axle times within the design period of the lane is 7.2×107 times / lane. The overlay plan that can be us...

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Abstract

The invention discloses an asphalt pavement structure for heavy-duty traffics, belongs to the technical field of road engineering construction and maintenance and particularly relates to an asphalt pavement structure for heavy-duty traffics. The asphalt pavement structure comprises a substrate layer, a base layer, a stress absorbing layer, an anti-fatigue layer, a bonding layer, a bearing layer, abonding layer and a wearing layer in sequence from bottom to top. The asphalt pavement structure disclosed by the invention can solve anti-rutting deformation of pavements under heavy-duty traffic conditions of expressways, and has high stability, low-temperature cracking resistance, wear resistance and bonding and waterproof effects; and the pavement is large in macroscopic structure and good inanti-sliding property, and the service life of the pavement can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of highway engineering construction and maintenance, and in particular relates to an asphalt pavement structure for heavy-duty traffic. Background technique [0002] With the rapid development of my country's transportation industry, the traffic volume of highways is increasing, the number of heavy vehicles is increasing rapidly, heavy loads, overloading, and channelized traffic are becoming more and more serious, and frequent occurrence of high temperature weather, many factors lead to insufficient high temperature stability of the road surface And the resulting diseases such as rutting, pushing, and hugging are the main forms of early diseases of asphalt pavement in my country's expressways. These early permanent deformation diseases will affect the flatness of the road surface, reduce the overall strength of the surface layer and the pavement structure, reduce the anti-skid ability of the road surface, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/32
CPCE01C7/32
Inventor 肖护兵徐萌权栋郭兆民
Owner 江苏一诺路桥工程检测有限公司
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