GPS RTK技术在铁路既有线勘测中的应用  

Application of GPS Real Time Kinematic Technique for Existing Railway Line Survey

作　　者：丁克良[1] 刘成[2] 卜庆颢[2] 胡丛伟[3] 郑德华[3] 

机构地区：[1]中国科学院测量与地球物理研究所 [2]铁道第三勘察设计院,天津300142 [3]同济大学测量与国土信息工程系,上海200092

出　　处：《中国铁道科学》2005年第2期49-53,共5页China Railway Science

基　　金：国家自然科学基金项目(40474009);铁道第三勘察设计院资助项目(2002)

摘　　要：针对GPS实时动态定位技术在铁路勘测中的应用,提出连续三角网重复设站测量既有线的方法。该方法以铁路控制测量的首级控制网点作为GPSRTK作业基准点,无需设置外移桩。数据处理时采用带约束条件的最小二乘法进行解算,可准确恢复既有线的各项参数,进而根据设计线形参数求得设计坐标,精确计算每一点的拨距量。A new surveying method with GPS RTK technique (GPS is the abbreviation of global positioning system, RTK is the abbreviation of real time kinematic) is proposed for the existing railway by overlapped stations in continuous triangle networks. Instead of making use of the traditional side stakes, the control points developed in rail construction are used as base station. In addition, a rigorous least square estimation algorithm is presented in which all linear parameters, designed coordinates and the accurate curve realignment corrections are obtained for each point related to the existing railway.

关 键 词：勘测 GPS RTK 既有线复测 线形参数 曲线整正 

分 类 号：U212.24[交通运输工程—道路与铁道工程] P228.4[天文地球—大地测量学与测量工程]