高速铁路轨道基准网高程网的精度评定

Research on height network precision assessment of German track reference network

德国轨道基准网(TRN)是CRTSⅡ型板式无砟轨道技术的一部分,并在我国高速铁路精密测量中普遍应用,但德国缺乏适合国内测量习惯的精度评定方法,而且其0.1mm的高差中误差也不客观。本文首先介绍德国TRN高程网测量和数据处理方法,分析TRN往返测高程较差限差与高差中误差的关系,并在此基础上,根据TRN高程网往返测高差较差,提出TRN高差中误差的计算方法,推导其数学模型,并采用该模型计算和统计了某高速铁路TRN的相邻轨道基准点(TRP)间的高差中误差。研究认为0.3mm的高差中误差应为TRN高程网的精度标准,其结果对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考价值。

German Track Reference Network （TRN for short） is part of CRTSⅡ Slab ballastless track technology, which has been universally applied in the precision measurement of high-speed railway in Chi- na. However, there is no corresponding precision assessment method in Germany which is suitable for do- mestic measurement habits. What＇s more, the height difference mean square error of 0.01mm is not objec- tive. This paper firstly introduced the German TRN height network measurement and data processing methods, analyzed the relationship between limited error of round trip height measurement and the height difference mean square error. Secondly, based on TRN mutual difference in round trip height measurement, a calculating method for height difference mean square error was put forward and its mathematical model was derived. This mathematical model was applied for calculations and statistics of the height differ- ence mean square error of adjacent TRP of a high-speed railway TRN（Track Reference Point） plane net- work then. The study suggested that the height difference mean square error of 0.03mm should be the pre- cision standard of TRN height network. The study would produce a reference for perfecting the specifica- tion for high-speed railway engineering survey and for directing production.