底基层特性对路面结构层附加应力的影响研究

Study on the Influences of Subbase Properties on Pavement Additional Stress

路面结构层的底基层特性对路面结构层附加应力有一定的影响。文章采用ABAQUS有限元软件,结合江苏省某高速公路,分析了底基层模量、厚度对路面结构层附加应力的影响。结果表明路面结构的面层均处于受压状态;基层和底基层处于受拉状态;附加应力在路面结构中心处最大,向两侧逐渐减小,路肩处附加应力最小。面层、基层内的附加应力随底基层模量和厚度的增大而减小;底基层的附加应力随底基层模量和厚度的增大而增大。

The subbase properties of pavement layer exert an influence on additional stress of pavement layer. The effect of subbase modulus and thickness on additional stress of pavement layer are analyzed by ABAQUS combined with a expressway in Jiangsu province. Results show that the surface course is in compression state, the base and subbase is in tension state; additional stress in pavement center is maximum and decreases gradually to both sides, in shoulder it is minimum; additional stress of surface course and base decrease with the increase of modulus and thickness of subbase ; additional stress of subbase increase with the increase of the modulus and thickness of subbase.