京沪高速铁路廊坊站道岔打磨验收标准的分析及应用

Analysis and Application of Switch Grinding Acceptance Criteria for Lang Fang Railway Station on Beijing- Shanghai High-speed Railway

钢轨打磨作为铁路工务部门在线路养护维修中的一种重要方法已经在我国得到广泛的应用。采用新型打磨设备和检测仪器对廊坊站高速道岔进行打磨和检测,并分析原铁道部颁布的验收标准和德国铁路验收标准,从钢轨波形磨耗、钢轨廓形、钢轨表面粗糙度和外观这几方面进行验收。实践表明,钢轨打磨后道岔动力学指标得到明显改善,轴向加速度、减载率峰值明显下降,延长了道岔钢轨的使用寿命。

Being as an important approach of line maintenance, rail grinding has been widely used in China. New grinding equipment and detecting instrument are employed to grind and detect high-speed turnouts in Langfang railway station and the acceptance standards of Chinese railway department and German railway are analyzed from the aspects of corrugation, rail profile, rail surface roughness and appearance. The practices demonstrate that the indexes of turnout dynamics are remarkably improved after rail grinding, and axial acceleration and the peak value of load reduction rate are dramatically declined, which prolongs the operational life of turnout rail.