双块式无砟轨道道床板受温度及列车荷载反复作用,存在裂缝及疲劳损伤问题,对于双块式无砟轨道道床板疲劳设计及疲劳检算,尚无相关标准。借鉴公路混凝土路面疲劳的检算方法,结合现行国内混凝土结构标准,对道床板疲劳设计及检算方法进行了初步研究,并拟合出裂缝宽度与道床板疲劳配筋率的函数关系。 The double-block ballastless ballastless track bed is repeatedly affected by the temperature and the train load, and has the problems of cracks and fatigue damage. There is no relevant standard for the fatigue design and fatigue test of the ballastless ballastless track bed. With reference to the method of checking the fatigue of highway concrete pavement and the current domestic concrete structure standards, the fatigue design and checking method of the pavement slab are studied preliminarily. The function of the crack width and the fatigue ratio of the ballast bed is also fitted.