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钢轨接头病害是世界各国铁路线路的主要病害之一,我国尤为突出。试验表明,当低接头1.53mm,列车运行速度102km/h时,平轨前比平轨后振动能量高7～8倍;低接头0.5mm,接头增加冲击力20～25t。根据现场调查,有缝线路区段,每年用于整治接头病害用工数,约占线路维修养护总工数的60～70％,一旦形成了接头病害道碴溜坍,线路方向不良,高低、水平都难以保持,轨枕和扣件损坏,影响线路质量和运输安全,缩短轮轨使用寿命,影响旅客舒适度。由此可见,及时平直钢轨低接头和钢轨低洼不仅可以减少维修养护工作量,延长轮、轨,机车车辆和线路设备的使用寿命,
Rail joint disease is one of the main diseases of railway lines in various countries in the world, especially in our country. Experiments show that when the low joint 1.53mm, the train running speed of 102km / h, flat rail before the flat rail vibration energy 7 to 8 times higher; low joint 0.5mm, the joint increases the impact of 20 ~ 25t. According to the site survey, there are seams in the section of seams, and the number of workers used for remediation of joint diseases annually accounts for 60-70% of the total number of line maintenance and repair work. Once the ballast slump of joint diseases is formed, the direction of the line is bad, The level is difficult to maintain, sleepers and fasteners damaged, affecting the quality of lines and transport safety, shortening the service life of wheel and rail, affecting passenger comfort. Thus it can be seen that timely and straight rail low joint and rail low-lying can not only reduce the workload of maintenance and repair, extend the service life of wheels, rails, rolling stock and line equipment,