小型构造物上沥青路面结构力学行为研究

Study on Mechanic Behavior of Asphalt Pavement Structure on the Small-scaled Structure

采用弹性层状体系的力学模型,利用有限元法和模型试验方法对由于小型构造物存在而导致的路表拉应力进行了详细分析并研究了其结构性能.结果表明:由于构造物存在而引起的路表拉应力受构造物顶部填土高度以及基层厚度的影响较大,而构造物两侧回填压实较为困难,则是含构造物路面产生病害的主要原因.

Tension stress in asphalt pavement above structure across roadway, such as culvert and underpass, has been calculated by FEM with elastic layered system theory and model test. The results show： tension stress on the surface of the pavement caused by the structure is greatly influenced by the thickness of the basement and the road base above the structure. The main reason of damage in the pavement above structure is that earthworks of the road base can not be well compacted.