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为反映川西寒区复杂的气温条件对沥青路面荷载应力响应的影响,以沥青混凝土劲度模量为面层结构的基本力学参数,结合对寒区气候时空分布数据的收集和整理,采用数值计算方法,对比了川西冬寒区与冬冷区沥青面层对行车荷载作用的应力响应,发现就沥青路面结构层最大拉应力而言,寒区超低温对面层的影响明显高于冬冷区,而水稳基层则相对不敏感。基于此提出:在川西寒区特殊环境下,沥青路面的厚度设计当更加重视气温在空间和时段上的分布规律。
In order to reflect the influence of complex temperature in cold region of Sichuan on load stress response of asphalt pavement, taking the stiffness modulus of asphalt mixture as the basic mechanical parameter of surface structure, and the collection and arrangement of spatial and temporal distribution data of climate in cold region, Method, the stress responses of asphalt surfacing to driving load in winter and winter cold regions in western Sichuan are contrasted. It is found that the influence of the ultra-low temperature in the cold region on the surface layer is obviously higher than that in the winter cold region in terms of the maximum tensile stress of asphalt pavement structure Water-based is relatively insensitive. Based on this, it is proposed that the thickness of asphalt pavement design should pay more attention to the distribution of temperature in space and time under the special environment of cold region in western Sichuan.