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水泥混凝土路面在温度、混凝土收缩、汽车制动力等作用下,面层将与水泥稳定碎石基层发生层间分离,层间分离后,水泥混凝土路面面层与基层之间将出现层间间隙,导致路面承载力和疲劳寿命大幅下降。通过对水泥稳定碎石基层上的水泥混凝土试件施加水平荷载,使水泥混凝土试件发生层间分离,完全分离后卸载,水泥混凝土试件产生不可恢复的竖向位移,即层间产生了间隙。本文研究层间分离与竖向不可恢复位移(层间间隙)之间的关系。
Cement concrete pavement under the action of temperature, concrete shrinkage, braking force of automobile and so on, the surface layer will be separated from the cement stabilized gravel basement layer. After the layer separation, there will be interlayer clearance between the cement concrete pavement layer and the base layer, As a result, the bearing capacity and fatigue life of the road surface dropped significantly. By applying horizontal load to the cement concrete specimen on the base of the cement stabilized macadam, the cement concrete specimens are separated from each other and separated completely, and then unloaded. The cement concrete specimens produce unrecoverable vertical displacement, that is, gaps are formed between the layers . In this paper, we study the relationship between layer separation and vertical unrecoverable displacement (interlayer gap).