铁路既有线复测平面曲线分区新方法  

New method of partition for plane curve re-surveying of the railway

作　　者：张强[1] 刘成龙[1] 周凌焱 聂松广 孟凡超[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都610031

出　　处：《测绘工程》2014年第8期58-61,共4页Engineering of Surveying and Mapping

基　　金：中央高校基本科研业务专项资金资助项目(SWJTU12ZT07)

摘　　要：在对既有铁路复测数据进行分区、拟合和优化处理过程中,线路曲线的准确分区是其他工作的基础。考虑到现有的基于正矢分区方法精度不高,基于超高分区方法精度较高,但由于不容易准确获取超高和对应里程,导致其使用的局限性。为了实现轨道平面曲线的准确分区,提出一种基于平面曲线定长弦斜率变化和平面曲线线形特征的分区新方法。实例计算表明,方法分区精度高、效率高,能广泛应用于既有铁路复测平面曲线分区处理。Accurate partition for plane curve is the base of fitting and optimization for the existing railway.Because the partition based on versin e has low precision and the partition based on ultrahigh has high precision.It is hard to obtain accurately the ultrahigh and the related mileage.It proposes a new way to part based on the changing of chord slope and the feature of the plane curve.Results of calculation show this new way has high precision and efficiency and can be used widely.

关 键 词：平面曲线 弦斜率 里程 分区 

分 类 号：U212[交通运输工程—道路与铁道工程]