底基层结构特性对沥青路面反射裂缝的影响

The impaction analysis of the base course structural property on reflect crack in asphalt pavement

采用三维有限元静力分析方法,计算分析了在贫混凝土基层上加铺沥青面层的复合式结构在行车荷载作用下应力随底基层模量、底基层厚度的变化情况,从理论上研究了不同底基层模量、不同底基层厚度对沥青面层反射裂缝的影响,阐述了底基层模量和厚度对沥青面层荷载应力的重要作用,提出了在结构层厚度一定的情况下,底基层最佳模量的取值范围。

Adopting the three-dimension finite element static analysis method,calculate and analyse the cement concrete pavement which was jointed asphaltum overlayer under the wheel load the stress along with the change of the base course modulus ,in theory take a deep study of the effect of the different base course modulus and course thickness to the asphaltum overlayer reflectional crack , setforth the great effect of the base course modulus and course thickness to the asphaltum overlayer load stress , put forward the best base course modulus, when the thickness of the structural layer is definite.