The Calculation And Analysis About Moisture Damage In Roadbed Of Highway

In the rapid development of society and economic, the communication project of our country is achieved much all over the world, especially a great deal of highway have been built. At the same time, the problem of damage in early phase is severer day by day due to all kinds of factors. The moisture damage on the asphalt pavement is a disease that occurred often. If water filter into roadbed, it's capacity of support load and stability will be depressed.The water in the roadbed is formed in many sources, but mostly is from rainwater and the water on highway surface, the minor is from groundwater and capillary etc.Many people have studied the state of the whole roadbed containing water, this dissertation analyzed the state of part roadbed containing water, and the vehicle load is considered of a dynamic load, and the finite element method is used, and the elasto-plasticity theory is introduced. The deformation and stress of roadbed is analyzed.In the course of analysis, the section of containing water is changed along width and depth, vary moisture content result in different deformation and vary stress.On bases of moisture damage mechanism, the measures of preventing and reducing moisture damage in roadbed on design, material selection, constructing and management after the highway is completed are presented.