一、随着国民经济的发展,铁路运输量不断增长,既有铁路运输能力不能满足运输量的需要,为提高铁路运输能力,其最有效的方法之一是提高列车运行速度。因此,为提高列车的运行速度与平稳,对既有的平面曲线进行改造,改善线路平面状态势在必行。近几年,随着光电测距仪和便携式微机在工程测量中的普及应用,传统测量方法已不能适应现代技术的需要。既有线平面曲线 First, with the development of the national economy, the amount of railway traffic is constantly increasing, and the existing railway transport capacity can not meet the needs of traffic volume. One of the most effective ways to improve railway transport capacity is to increase the speed of train operation. Therefore, in order to improve the running speed and smoothness of the train, it is imperative to reform the existing plane curve and improve the plane state of the line. In recent years, with the popularization and application of photoelectric range finder and portable microcomputer in engineering surveying, the traditional measuring methods can not meet the needs of modern technology. Both line plane curve