超载作用下高速公路沥青路面设计参数敏感性分析

本文介绍了江苏省高速公路的超载现状，分析超载车辆的特征，建立了超载车辆与沥青路面接地方式的计算模式，并以弯沉和弯拉应力为控制指标进行沥青路面的设计参数敏感性分析。对沪宁高速公路和沿江高速公路两条典型的高速公路，在超载作用情况下作了敏感性分析．研究表明在超载重载条件下高等级沥青路面结构设计中以基层底部弯拉应力为设计指标控制较为合理。

Sensitivity Analysis of Structural Design Parameters of Expressway under Overload

The situation of overload on expressway in Jiangsu Province was introduced. By analyzing the character of overloaded vehicles, a suitable contact model between overloaded freight and asphalt pavement was established. The sensitivity of the structural design parameters with control indexes of deflection and flexible-tensile stress were researched. Then, Hu-Ning Expressway and Yanjiang Expressway, the two typical expressways in Jiangsu Province, were chosen to analyze the parameter sensitivity under overload. The research results show that the flexible-tensile stress under the basement is the suitable design control index for the asphalt pavement structure of expressway under overload.