高速铁路无砟轨道精调测量方法探索

Measurement Method for Precision Adjustment of HSR Ballastless Track

目前,我国高速铁路无砟轨道的精调主要是基于CPⅢ控制网的绝对测量,其坐标测量和长波控制得到普遍认可,但短波控制能力不足的问题常被忽视,其对保证高速铁路±1mm的短波平顺性比较困难。而以测量速度见长的(轨道检查仪)相对测量,却因坐标控制能力缺失、长波测量精度有限,在使用上受到限制。本文对以上两种方法的平顺性精度进行了论证,并对如何利用现有设备,更高效、更准确地完成无砟轨道精调测量进行了探索,拓宽信息维度,进行信息融合,可更好地控制轨道平顺性。离散傅里叶变换和逆变换是该方法的核心,其原理清晰,物理意义明确,以此得到的轨道波形绝对位置准确,细节信息丰富,长短波一致性达到要求。

At present,the fine adjustment of the ballastless track of high-speed railway in China is mainly based on the absolute measurement of CPⅢ control network.The effectiveness of coordinate measurement and longwave control are well recognized,while the shortcomings in shortwave control are often overlooked.It is difficult to guarantee±1 mm short wave ride comfort for high-speed railway.The relative measurement mode of track inspection instrument,known for its high efficiency in speed measurement,is limited in use due to the lack of coordinate control capability and the limited accuracy of long wave measurement.This study addressed the ride comfort accuracy of the above two methods as well as conducted investigations on completing the ballastless track fine tuning measurement with existing equipment more efficiently and accurately.The dimensions of the acquired information were extended and information from multiple sources was fused to control the ride comfort more effectively.Discrete Fourier transform and inverse transform were the key ingredients of the method,the principle of which was theoretically clear with definite physical meaning.The absolute position of the obtained track waveform was accurate with rich details.The consistency of the long and short waves met the requirements.