基于车辙等效的轴载换算关系研究

Research on Axle Load Conversion Based on the Rutting Equivalent

车辙作为高速公路路面主要病害之一,在我国现行公路沥青路面设计规范中没有纳入车辙指标。目前在国内许多科研机构和学者都在致力于车辙形成机理及车辙预测等方面的研究工作,足尺加速加载试验在公路工程领域是科研费用最昂贵,结果可靠性较接近实际路面状况。通过对野外三种路面结构的加速加载试验,利用车辙等效的关系确定出不同路面结构对应的合理轴载换算指数。将加速加载试验成果与室内车辙试验进行对照,证实室外加速加载试验得出的轴载换算指数与室内试验结果之间的差异。

Rutting,as one of the major pavement diseases,is not in the current highway asphalt pavement design criterion of China.Presently,some research institutions and scholars are committed to the study of rut formation mechanism and the rutting prediction.Though the full scale accelerated load test is the most expensive one in the areas of highway projects scientific research,the reliability of its results is close to the actual road condition.Through the field accelerated loading test on three types of pavement structure,the reasonable axle load conversion index for different pavement structures were determined by rutting equivalent.Based on the comparison of accelerated loading test and the laboratory rutting test,the difference of the axle load conversion index between them was validated.