Abstract:

First,a rut prediction model,in which the moduli of different layers were inversely calculated by the FWD (Falling Weight Deflectometer)deflection basin,was introduced.Next,the deflection and stress on each surface of the layer as well as the permanent deform ation parameters of each layer were calculated using the Kenlay.er program.Then,the ruts with different loading repetition numbers were predicted.Finally,a full-scale accelerated loading test was carried out to analyze the rut prediction model and the rut form ation law.The results indicate that the prediction model accords well with the form ation and size of the practical rut.

Key words: asphalt pavement, rut, falling weight deflectometer, accelerated loading