Experiment Method Study on the Dynamic Response of Multilayer Flexible Pavement

The study on dynamic response of pavement under real transportation load is one international thermal topic. In view of the characteristics of the construction process of asphalt pavement and the dynamic response under heavy truck, one strain sensor was built up which can detect the dynamic strain of pavement under moving load. And corresponding tests were carried on in laboratory and in field road. It´s found that the sensor not only can bear the destruction of high temperature and shearing, but also can satisfy the test requirement on dynamic transfer. Without especially protection, the survival rate in field road arrived to 82%. It´s also found that the influence of the rigidity of the base layers on the dynamic response is large, and found that the dynamic strain at the bottom of each surface layer under moving load presents not only tensile strain but also compressive strain.