Influence Analysis of Structural Stress on Wheel Track of Typical Asphalt Pavement
By finite element calculations and theoretical analysis,the relationship between the stress variation law and wheel track of different asphalt pavement structures is carried out.The relationships among asphalt pavement structure combinations and stress,wheel track are explained theoretically,which is further supported by the analysis of the wheel track under different conditions combined based on engineering research.The main conclusions include that rutting mainly occurs within a depth range of 18 cm under the road surface;The internal compressive stress val-ues of different pavement structures gradually decrease with the increase of depth.The higher the stiffness of the pavement structure,the slightly higher the compressive stress level at the same depth;The internal shear stress val-ues of different pavement structures show a trend of increasing firstly and then decreasing with depth.The stiffer the pavement structure,the higher the shear stress level at the same depth;An asphalt pavement structure with a thin asphalt layer(10 cm)and high stiffness has fewer ruts;The asphalt surface with slightly thicker(18 cm)layer and lower stiffness has an increasing trend of ruts;The asphalt surface with thicker layer(greater than 22 cm)has lower stiffness and a"softer"structure,which significantly reduces stress levels and reduces the likelihood of contact sur-face failure at thicker depths.Both the damage occurrence of compaction deformation or shear are significantly re-duced.Therefore,it won't cause more ruts than that with thinner asphalt surface layer.The relevant results provide reference for similar asphalt pavement structure.
国家科技期刊平台
NSTL
万方数据
