二灰碎石基层疲劳性能的模型试验研究

Model Test Study of Fatigue Property of Two-ash-macadam Road Base

通过在实验室修建的一段与现场实际结构相同的高等级公路路基试验路段 ,采用定点加载模拟车辆荷载的方法 ,测试了路面结构不同层次的应力、基层和底基层的应变。分析了应力和基层拉应变与荷载的相关关系以及拉应变随加载次数的变化规律 。

With a vibrating piston to simulate car wheel load, the stress and strain at differente depth in one section of test roadbed built in laboratory, which is of the same structure with real freeway bed, is tested. In this paper, the relation of stress and tensile strain of road base to load, and the tensile stress change with load frequency is analyzed. The fatigue life of two ash macadam road base is forecasted.