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Asphalt stabilized macadam overlay reforming method for old road and structure thereof

A technology of asphalt stabilizing gravel and old roads, applied in roads, roads, road repair and other directions, can solve problems such as complex construction methods

Active Publication Date: 2009-12-16
JIANGXI GANYUE EXPRESSWAY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0030] The methods listed above have relatively high limitations for repairing damaged pavement, and cannot be widely applied to pavement with various degrees of damage, and the construction method is relatively complicated

Method used

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  • Asphalt stabilized macadam overlay reforming method for old road and structure thereof
  • Asphalt stabilized macadam overlay reforming method for old road and structure thereof
  • Asphalt stabilized macadam overlay reforming method for old road and structure thereof

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Experimental program
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Embodiment Construction

[0048] First, determine the equivalent rebound modulus of the original pavement.

[0049] The structural bearing capacity of the pavement refers to the number of driving loads that the pavement can withstand before reaching the predetermined damage state, or the number of years it can be used. The bearing capacity of the pavement structure is intrinsically related to the damage condition. During use, the bearing capacity of the pavement gradually decreases, and at the same time the damage develops gradually.

[0050] The determination of the bearing capacity of pavement structures can be divided into damaged and undamaged. The damaged type mainly drills samples from each structural layer of the pavement, and tests to determine its various calculation parameters, and compares it with the design standard to estimate its structural bearing capacity. The non-damage type measurement estimates the structural bearing capacity of the road surface through the non-damage deflection of...

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Abstract

An asphalt stabilized macadam overlay reforming method for old road comprises determining equivalent resilient modulus of original road surface, performing construction by using one of the following three treating schemes or combination, aiming at different damage conditions of road surface, wherein scheme A is to overlay asphalt concrete layer on original road surface which is not seriously damaged; scheme B is to excavate partly a layer of original road surface which is locally damaged, such as spongy surface, track, looseness, crack and the like, back patch asphalt stabilized macadam, overlay an asphalt concrete layer thereon; scheme C is to excavate fully an oil surface layer of the original road surface which is seriously damaged, has a track depth larger than 3cm, local net-shaped cracking, depression and deformation, not scratch the base layer, overlay an asphalt concrete layer thereon after performing priming oil treatment and back patching two layers of asphalt stabilized macadam.

Description

technical field [0001] The invention relates to the modification and structure of the asphalt pavement, in particular to the modification method and specific pavement structure of the old pavement by paving the asphalt stabilized crushed stone structure. Background technique [0002] There are many reasons for pavement damage, mainly including structure, material design, heavy load, overload and construction. [0003] Due to various reasons, the pavement has been damaged to varying degrees after a certain service life, that is, the performance of the pavement will decline year by year with the driving load and environmental factors during use. This damage includes structural damage and functional damage. When the performance of pavement (including structural bearing capacity performance and surface functional performance) degrades to a certain standard, or its traffic capacity can no longer meet the requirements of traffic volume, every measure must be taken to restore the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C23/06E01C23/12
Inventor 况小根谭生光刘辉明王宏畅
Owner JIANGXI GANYUE EXPRESSWAY
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