客运专线轨道精调相邻站平顺衔接方法研究

客运专线轨道精调中,相邻站轨道几何状态信息平顺衔接是否合理将直接影响轨道的平顺性,不同的平顺衔接方法对于轨道轨向、高低长短波的计算将产生不一样的结果,国内主要采用的是重叠区余弦函数平顺衔接的方法。提出一种基于平顺变化率扩展重叠区余弦函数平顺衔接方法,在理论分析的基础上,结合工程实践,对这两种方法进行了综合比对分析。结果表明:在相邻两站重叠区轨道量测点坐标较差较小的情况下,两种方法得到的衔接平滑结果,均可以满足轨道长短波检测的需要。而基于平顺变化率扩展重叠区余弦函数平顺衔接方法,其顺接长度是根据相邻站重叠区较差而动态变化的,很好地保障了平顺性变化率的精度要求。

Research on Methods of Smooth Convergence between Adjacent Stations during Track Accurate Adjustment for Railway Passenger-dedicated Line

In the process of track accurate adjustment for railway passenger-dedicated line,that weather or not the method of smooth convergence of track geometric status information between adjacent stations is reasonable will directly affect the regularity of track.Different smooth convergence methods will produce different computational results of track alignment and waves,which may be either high and low or long and short.In contrast with the smooth convergence method of overlapping region cosine function which is widely used in China at present,this paper proposed a new smooth convergence method of extended overlapping region cosine function based on regularity change rate.Furthermore,on the basis of theoretical analysis and in combination with engineering practices,a comparative analysis between the two methods was comprehensively carried out in this paper.The results show that;(a) When the coordinate discrepancy of track measurement points at the overlapping region between adjacent stations is small,the smooth convergence results obtained by both the two methods can all meet the requirement for testing the long and short waves of track,(b) If using the new smooth convergence method of extended overlapping region cosine function based on regularity change rate,the length of smooth convergence will dynamically change with the discrepancy change of overlapping region between adjacent stations,so this new method can better meet the accuracy requirement of regularity change rate.