The Analysis Of Water Damage Of Asphalt Pavement And Pavement Drainage Design In Rainy Areas

Highway asphalt pavement damage caused by water is one of the main reasons in our country.A lot of research datas show that the free water infiltration within the pavement structure is the first factor of pavement damage.Water damage greatly reduce the service life of the pavement,improves the pavement maintenance cost,brings to the safety hidden trouble at the same time also can cause a huge loss to national economy.How to effectively the path of waterproof and drainage design is a issue for current highway research workers.This article is under the background of Yangxuan highway pavement drainage design in Yunnan province.First form early water damage of asphalt pavement,causing reasons,function theory,and the study of damage mechanism,etc.On the basis of a certain understanding to water damage of asphalt pavement,through the pavement design relevant literature both at home and abroad,table from road drainage,median drainage,pavement structure internal drainage and drainage structure design.Putting forward a set of suitable for wet areas of asphalt pavement drainage design.At last,by SEEP/W finite element numerical simulation software.Study the relationship between the air void of asphalt and drainage efficiency and analyzes the four kinds of relations between the efficiency of the drainage pavement structure.Hoping that through this article can give Yangxuan high-speed pavement drainage design to provide some suggestions.Moreover provides some reference opinions to the researchers of rainy area of asphalt pavement drainage design.Numerical model analysis results showed that: when it begins to rain,with the void fraction increases,the faster the pavement water seepage,later period decreases until saturated.The ooze water efficiency of the drainage system which sets the edge drainage system or the drainage layer of the pavement structure is amost the same.And much higher than not set any drainage of pavement structure.Setting drainage at the grass-roots level the edge of the pavement seepage drainage system efficiency on the above two kinds of pavement structure has promoted a class.But not quite the simple superposition of the two kinds of structure above.How to use in the actual project,still need to from their own advantages and disadvantages of each drainage structure and economy,the environmental factors to consider...