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一、引言无碴轨道是高速铁路高速化发展的必然要求,而板式无碴轨道则是无碴轨道的主要结构形式之一,其具有如下优点:1基于板式轨道的结构特点,其轨道稳定性、平顺性且由于不引入需要时常更换的道碴,其耐久性较好;2由于不使用道碴,道床整体整洁美观,不存在道碴飞溅和粉化问题,且结构高度低、自重轻;3为了保证轨道整体的强度和弹性,一般板式无碴轨道在混凝土基床与轨道板之间铺有一层约50mm厚的水泥沥青砂浆
I. INTRODUCTION Ballastless track is an inevitable requirement for the high-speed development of high-speed railway. Plate ballastless track is one of the main structural forms of ballastless track, which has the following advantages: 1 Based on the structural characteristics of slab track, its orbital stability , Smoothness and good durability due to not introducing the ballast which needs to be replaced frequently; 2 Because ballast is not used, the balustrade is clean and beautiful as a whole, there is no problem of ballast splashing and powdering, and the structure is low in height and light in weight; 3 In order to ensure the overall strength and elasticity of the track, the general slab ballastless track is laid with a layer of concrete mortar about 50 mm thick between the concrete bed and the track slab