沥青路面土基永久变形预测

Prediction of permanent deformation in subgrade of asphalt concrete pavement

首先简要综述了车辆循环荷载下柔性路面路基变形的研究现状;然后,基于南非重车加载试验数据建立了一个简单的计算模型来预测柔性路面路基的永久变形量,该模型可以全面考虑路基材料特性、路基土在车辆荷载作用下的应力应变状况和荷载作用次数;最后,以一个柔性路面为例,应用该模型对循环荷载下的路基变形发展进行了预估。

It briefly presents the state of rutting in flexible pavement foundation under axle cyclic loading. Based on the South Africa heavy vehicle simulator test data, a practical model for calculating permanent deformation of subgrade soils in flexible pavements is proposed. The model takes into account the subgrade soils material characters, stress and strain field in subgrade under axle loading and the number of cyclic loading. In the end, an illustrative example is given for the prediction of rut depth development in a flexible pavement subgrade soil.