新建高速铁路有砟轨道线路平顺性控制技术

基于高速铁路有砟轨道设备的记忆性及维修天窗资源的有限性,在施工建设阶段开展高速铁路有砟轨道平顺性控制,提高线路开通运营品质具有重要的意义。通过对比分析两条有砟轨道开通后平顺性自然衰减规律,发现有砟道床稳定性是线路开通后维持轨道平顺性的核心要素,而捣固作业后的稳定作业是提高道床密实度和稳定性的主要手段。为此以杭黄铁路有砟轨道建设为载体,提出"先轨距调整、后大机整道、再扣件调整"的精调流程,"少捣多稳、低速重稳"的大机作业模式。实践证明,采用上述做法,杭黄铁路拉通试验中正线轨道几何尺寸均值指标TQI为2.5 mm,峰值指标偏差扣分为0,成效显著。

Smoothness Control Technology of Ballasted Track of Newly Constructed High Speed Railway

Due to the memory property of the ballasted track equipment and the limitation of the maintenance time, smoothness control of high speed railway ballasted track during the construction is very important to improve the operation quality of the track. After contrastive analysis of two operating ballasted lines' natural decay law of smoothness, this paper finds that the stability of ballasted track bed is the key factor to maintain track smoothness after the line is opened, and stable operation is the main means to improve the density and stability of ballast bed. Therefore, on the basis of the construction of Hangzhou-Huangshan Railway, this paper puts forward the fine adjustment sequence of "gauge setting, heavy machine trimming, and fastener adjusting", and the heavy machine operation mode of "less tamping, more stabilizing, low speed and heavy stabilizing". Practice has proved that, by adopting the above innovative practices, the track geometry TQI index of the main line of Hangzhou-Huangshan Railway is 2.5 mm, and the deviation of the peak index is 0.