机场水泥混凝土道面隔离式加铺层板厚合理性分析

通过实例,对机场水泥混凝土道面隔离式加铺层厚度与疲劳应力的关系进行分析,发现旧水泥混凝土道面疲劳应力随着加铺层厚度增加而减小,而加铺层疲劳应力却出现一个峰值。分析了旧道面不同计算厚度与加铺层疲劳应力峰值出现点对应的加铺层厚度的关系,提出当旧道面计算厚度小于20 cm时,加铺层厚度应比综合疲劳应力峰值对应的厚度大1～2 cm;当旧道面计算厚度大于20 cm时,加铺层厚度应比综合疲劳应力峰值对应的厚度小1～2 cm,为机场道面隔离式加铺设计提供参考。

Rationality analysis on thickness of the cement concrete seclusion type pavement overlay

The connection between the fatigue stress and the thickness of the seclusion type overlay was analyzed according to a project example,it can conclude that the fatigue stress of the old airport pavement was reduced while the thickness of the seclusion type overlay was increased,but the fatigue stress of the overlay reached to a peak value.Then the connection between the peak fatigue stress and the different design thickness of the old airport pavement was analyzed,it indicated that when the design thickness of the old concrete pavement is less than 20cm,the thickness of the overlay will be 1~2 cm more than the thickness of the peak fatigue stress,otherwise it is 1~2 cm less,and it can offer a reference for the design of the cement concrete seclusion type pavement overlay.