高铁无砟轨道CPⅢ数据网平差方法研究

Study on the Adjustment Method of CPⅢ Data Network in High-speed Railway Ballastless Track

相对于传统铁路,高速铁路对于乘客舒适度、安全性和平顺性提出了更高的要求,因此轨道的设计、测量精度、几何尺寸等都要相应有更高的水平。本文主要针对无砟轨道CPⅢ平面网测量、CPⅢ平面控制网布设、CPⅢ控制点测量方法及与上一级控制网的关系进行了研究与分析,并指出了相关的技术要求。重点讨论将CPⅢ点当作近似坐标进行角度平差和距离平差,进而进行整体平差,计算出平差结果,根据测绘高铁规范要求进行精度评定。通过理论研究后应用Matlab编程精度评定对比分析,认为该方法可以用于轨道基准网平面网的测量及其严密平差计算,且具有多方面优势。

Compared with traditional railways,high-speed railways have higher requirements for safety,smoothness,and passenger comfort. This requires a higher level of design,geometry and measurement accuracy of the track itself. This paper mainly focuses on the measurement of the ballastless track CPⅢ plane network,the construction of the CPⅢ plane control network,the measurement method of the CPⅢ control points,and the relationship with the upper control network,and points out the relevant technical requirements. Emphasis is placed on the discussion of CPⅢ points as approximate coordinates for angle and distance adjustment,thus to carry out the overall adjustment and the accuracy verification of the adjustment results according to the high-speed railway measurement specifications. After theoretical study,Matlab programming is used to compare and analyze accuracy evaluation. It is concluded that this method can be used for the measurement of the plane network and the calculation of strict adjustment of the track reference network,and has many advantages.