既有线线位重构相关系数影响与对策探讨

Influence of correlation coefficients on line reconstruction of the existing railways

在某一既有铁路重构的工程实践中,出现拟合测点横向偏差异常,重构成果无法应用的现象。本文针对这一问题,开展铁路既有线线位重构中线路走向、相关系数与测点横向偏差的关系分析,得出在铁路线路走向特殊、重构相关系数值较小时,可能导致测点横向偏差异常,出现重构线位失真,相关系数值大时,拟合重构成果可靠的结论。本文对重构线位失真问题开展处理对策研究,采用坐标互换法、首尾基准线法尝试改变线路走向的理念,采用旋转坐标过渡法获得成功,有效解决重构线位失真问题。在重构软件研制中纳入相关系数计算,设置相关系数值0.5作为转向开关,作为重构成果可利用性的评判标准,并实施旋转坐标过渡法,保障重构成果可靠。

In practice of the line reconstruction for an existing railway,the abnormal lateral deviation of the fitting points occurs,and the reconstructed results cannot be applied in follow-on engineering.Aiming at this problem,this paper carries out the analysis of the relationship between route alignment scheme,correlation coefficients and the transverse deviation of points in the line reconstruction of the existing railway.It is concluded that when route alignment scheme along special directions and the value of reconstruction correlation coefficient is small,the transverse deviation of measuring points may be abnormal and the reconstruction line position is distorted,and when the value of correlation coefficient is large,the fitting reconstruction line is reliable.In this paper,the distortion problem of the reconstructed line is studied.The coordinate interchange method and the head-tail datum line method are used to change the trend of railway,and the coordinates rotating method is used successfully to solve the distortion problem of the reconstructed line.The calculation of correlation coefficients is included in the development of line reconstruction software.The value of correlation coefficient is set to be 0.5 as the steering switch to judge the availability of reconstruction line,and the rotation coordinate transition method is implemented to ensure its reliability.