轨检小车用于高速铁路轨道几何状态检测的关键问题研究

Research of Key Problems of Track Geometry Inspection Car Used for Track Geometry Inspection of High-speed Railway

高速铁路轨道的几何状态检测,就是在无列车荷载的情况下,对线路轨道的垂向、横向偏差和不平顺性进行检测,检测结果作为轨道调整的主要依据。采用轨检小车进行轨道的几何状态检测是一项新技术,其中坐标和里程的计算和转换是需要解决的关键问题。与通常情况下通过线路中心里程推算轨道坐标的方法不同,它是通过测量安装在轨检小车上的棱镜坐标来推算线路的中心里程,针对轨检小车上的棱镜坐标为非线路中心坐标的特点,研究了直线段、圆曲线段和缓和曲线段里程和坐标的计算及转换模型,编制了轨道检测计算软件,并成功应用于某高速铁路轨道的几何状态检测中。

The track geometry inspection of high-speed railway is to inspect the vertical and horizontal deviation and track geometric smoothness without the train load, and then the inspection results will serve as the main basis for track adjustment. The track geometry inspection car is a new technology to inspect the track geometry, in which the calculation and transformation of coordinate and mileage are the key problems. The method of using track geometry inspection car is different from the common method using line center mileage to calculate the track coordinate, while it calculates the center mileage by means of the prism coordinate installed at the track geometry inspection car. In this paper, in consideration that the track geometry inspection car＇s prism coordinate is not the line center coordinate, the modes of calculation and transformation of coordinate and mileage respectively in line segment, circular curve segment and in transition curve segment were investigated, the track geometry inspection calculation software was programmed, and the software has been applied to track geometry inspection of one high-speed railway successfully.