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基于路面平整度,结合汽车振动模型生成作用于沥青路面的随机荷载,根据弹性层状道路结构与弹性动力学理论建立车路耦合响应模型,通过数值计算分析了汽车动荷载作用下面层参数、基层参数、垫层参数、土基参数等对沥青路面作用深度的影响规律。结果表明:当结构层参数一定时,附加应力与自重应力的比值曲线在0~2 m范围内斜率非常大,但随着深度增加曲线斜率逐渐趋于0;在结构层参数的常规取值范围内,沥青路面作用深度随着面层、基层、垫层参数的增加而减小,随着土基模量的增加而增加,随着距路基顶面距离的增加而减小;与汽车静荷载的作用深度相比,汽车动荷载的作用深度较大。
Based on the flatness of the pavement and the random vibration of asphalt pavement combined with the vehicle vibration model, the vehicle-road coupling response model is established according to the elastic layered road structure and the theory of elastic dynamics. The influence of dynamic load on the parameters of the asphalt pavement, Parameters, cushion parameters, soil parameters and other effects on the role of asphalt pavement depth. The results show that when the structural layer parameters are constant, the slope of the ratio of additional stress to self-weight stress is very large in the range of 0 ~ 2 m, but gradually increases to 0 with the increase of depth. The depth of asphalt pavement decreases with the increase of surface, base and cushion parameters, and increases with the increase of the modulus of the soil base, decreases with the increase of the distance from the top of the subgrade; Compared with the depth of the role of the load, the dynamic load of the vehicle a greater depth of action.