高速铁路CPⅢ网区段搭接数据处理研究

研究目的:高速铁路轨道控制网(CPIII)相邻区段的搭接是否合理将直接影响轨道的平顺性,影响轨道长短波检测的计算结果。本文针对国内轨道控制网CPⅢ两种主要的区段衔接方法,结合工程实际进行了研究。给出两种搭接计算的算法,对两种算法的结果进行比较,并对其优缺点进行分析对比;对搭接平差前超限情况的处理方法进行阐述,为类似工程应用提供参考。研究结论:在相邻两段CPⅢ网独立平差后搭接区点的坐标较差≤3 mm情况下,两种方法得到的搭接平滑结果,均可以满足轨道长短波检测的需要。从测量理论和实践应用出发,严密平差搭接的方法应该更可靠,搭接数据处理的可操作性更强,更适用于工程测量实际情况。

Research on Sectional Overlapping Data Processing of Track Control Network for High -speed Railway

Research purposes: Whether the overlapping of the adjacent section of track control network(CPIII) for high-speed railway is rational or not will affect the track regularity and the computation results of checking the long and short waves of the track.Combining with the real projects,this paper researches the two main ways for the section overlapping of the tack control networks in China,offers the methods for calculation of two kinds of overlapping,compares their results,analyzes their advantages and disadvantages and explains the treatment method for the condition that the discrepancy exceeds the tolerance before the overlapping adjustment for the purpose of providing the reference to the similar projects in future. Research conclusions:Under the condition that the coordinates discrepancy of CPⅢ points in adjacent two overlapping sections are lower than 3 mm after independent adjustment,the overlapping smooth results obtained with these two methods can meet the demand of checking the long and short waves of the track.From the angles of the survey theory,practice and application,the rigorous adjustment overlapping method is more reliable,its maneuverability of the overlapping data processing is better,and it is more available for the engineering survey.