基于里程平差的线路平面坐标精密解算方法研究  

Research on the Precision Solution Method of Line Plane Coordinates Based on Mileage Adjustment

作　　者：王爱辉 WANG Ai-hui(China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308

出　　处：《现代测绘》2022年第5期30-37,共8页Modern Surveying and Mapping

基　　金：中国国家铁路集团有限公司科技研究重大项目(P2021T002);中国铁路设计集团有限公司科技开发计划重点课题(2022A02401001,2021A240510)。

摘　　要：线路平面坐标的解算精度对铁路线路的设计、施工、管理等具有重要影响。现有的切线支距法在不同坐标系下解算平面坐标时由于投影变形影响,存在较大的解算误差,线路的实际长度和设计长度不一致。在切线支距法的基础上,引入比例系数,提出了一种基于里程平差的线路平面坐标精密解算方法。结果表明,线路转折角α变形是影响曲线解算精度的主要因素,本方法解算的线路实际长度和设计长度基本一致,在圆缓点处的误差得到了校正。The accuracy of the solution of line plane coordinates has an important impact on the design, construction and management of railway lines.The existing tangent branching method has a large solution error due to the influence of projection deformation when solving plane coordinates in different coordinate systems.Therefore, this results in inconsistencies between the actual length of the line and the design length.In this paper, on the basis of the tangent branching method, a precision solution method of line plane coordinates based on mileage adjustment is proposed by introducing the scale coefficient.The results show that the deformation of the line turning angle is the main factor affecting the accuracy of the curve solution.The actual length of the line calculated in this paper is consistent with the design length, and the error at the slower point of the circle is corrected.

关 键 词：缓和曲线 切线支距法 里程平差 平面坐标解算 

分 类 号：P208[天文地球—地图制图学与地理信息工程]