高速铁路轨道基准网平面网精度评定方法

Plane Network Precision Assessment Based on Track Reference Network

德国轨道基准网TRN测量方法已在我国高速铁路精密测量中普遍应用。但德国没有相应的精度评定方法,而且其0.2mm的相对点位中误差也不客观。这里首先介绍了德国TRN平面网测量和数据处理方法;根据TRN平面网多次测量观测值之间的互差,提出了TRN平面网相邻点间相对点位中误差的计算方法;推导了其数学模型,并采用该模型计算和统计了某高速铁路TRN平面网相邻点间的相对点位中误差。研究认为0.3mm的相对点位中误差是TRN平面网的精度标准。研究结果对于完善我国高速铁路工程测量规范和指导生产具有较大的参照价值。

The measurement based on German TRN （Track Reference Network） has been universally applied in the precision measurement of high-speed railway in China. However, there is no corresponding precision as- sessment method in German. What＇s more, the relative mean square error of 0.2 mm is not objective. Firstly, the German TRN plane network measurement and data processing methods were introduced . And then according to mutual difference between the observed values based on German TRN plane network with multiple meas- urements, a calculating method for relative mean square error of adjacent points in German TRN plane network was put forward and its mathematical model was derived. This mathematical model was applied for calculations and statistics of the relative mean square error of adjacent points of a high-speed railway TRN plane network. The study suggested that the relative mean square error of 0.3 mm was the precision standard of TRN plane network. The study produced great reference value for perfecting the specification for high-speed railway engi- neering survey and for directing production.