砂土中汽车轮辙深度理论公式的试验修正

Formula Correction of Car Pavement Rut Theory in Sandy Pavement by Field Test

针对现有路面轮辙理论中的土质路面与实际应用时松散砂性路面边界条件的差异,开展汽车在砂性路面通行效果现场试验。试验表明,在通行过程引起剪切破坏导致结构破坏,轮辙深度比理论值大。通过分析提出了建立修正系数K以完善理论公式的方法。在现场试验的基础上,获取实际轮辙深度数据,再运用格拉布斯准则对试验数据进行数据处理,与理论值进行比较,通过计算得到轮辙理论公式的修正系数K=1.1。

Field test was carried out to research the moving effect of car in the sandy pavement for the differ ences of boundary conditions of soil pavement in the existing pavement rut theory and loose pavement in practical application. The test showed that the rut depth was bigger than the theoretical value because of the structure dam age of pavement caused by shear failure during the moving process of car. A correction coefficient was proposed to improve the theoretical formula through analysis. On the basis of field test, the actual rut depth data is obtained and the experiment data is processed by Grubbs criterion. By comparison between the actual and theoretical value, the correction coefficient of theoretical formula k = 1.1 is proposed.