small structures;  asphalt pavement;  structural properties;  Finite elements

Using the mechanical model of elastic layered system, the tensile stress of the road surface caused by the existence of small structures was analyzed in detail by finite element method and model test method, and its structural properties were studied. The results show that the tensile stress of the road surface caused by the existence of the structure is greatly affected by the top fill height and the thickness of the base layer of the structure, and the backfill compaction on both sides of the structure is more difficult, which is the main cause of disease in the pavement containing the structure.