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研究分析车辆荷载作用下沥青面层内竖向压应力分布规律,将面层压应力分布规律拆分为压应力分布形状函数与层底压应力二部分,从均匀模量面层出发,总结了双层结构、三层结构条件下的面层压应力分布形状函数与层底压应力折减系数的规律,给出了它们的回归式,对于不均匀模量面层,提出了以弯曲刚度等效原则的换算式,进而讨论了采用上述方法求解的面层压缩量方法和计算精度,在一般情况下,双层结构的面层压缩量计算误差不超过7%,三层结构的误差不超过5%,可以满足工程需要。
The distribution of vertical compressive stress in asphalt pavement under vehicle load is analyzed and studied. The distribution law of surface compressive stress is divided into two parts: the shape function of compressive stress distribution and the compressive stress at the bottom of the layer. Based on the uniform modulus surface, Double-layer structure, three-layer structure under the surface pressure distribution of the shape function and the bottom layer of the stress relaxation coefficient of the law, given their regression equation, for the non-uniform modulus of the surface, the proposed bending stiffness Efficiency principle conversion method, and then discussed using the above method to solve the surface compression method and calculation accuracy, in general, the double-layer structure of the surface compression calculation error does not exceed 7%, three-layer structure does not exceed the error 5%, to meet the needs of the project.