拟稳平差在铁路沉降变形监测中的应用  

Application of the Quasi-stable Adjustment in RailwaySettlement Deformation Monitoring

作　　者：依扎提古丽·阿布列利木 EZATGUL Ablilim(Tiefang Construction(Shanghai)Co.,Ltd.,Shanghai 202162,China)

机构地区：[1]铁方建设(上海)有限公司,上海202162

出　　处：《测绘与空间地理信息》2024年第5期191-194,共4页Geomatics & Spatial Information Technology

摘　　要：拟稳平差在评估基准点稳定性和分析铁路沉降变形方面具有重要作用。在处理变形监测网数据时,使用经典平差方法会受到基准点不稳定性的影响,从而影响平差模型的精度。为此,本论文引用MATLAB软件,采用稳定的基准点和秩亏平差两种方法来选择拟稳点,并进行拟稳平差。同时,还利用数理统计法对所选的拟稳点进行稳定性测试。以某公铁大桥变形监测网为实例,详细讨论了这两种拟稳点选择方法,并将拟稳平差结果与秩亏自由网平差进行对比。研究结果表明,拟稳平差方法具有更高的精度,并且拟稳点的选择直接影响拟稳平差监测点变化量的准确性。Quasi-stable adjustment plays an important role in evaluating the stability of reference points and analyzing railway settle-ment deformations.The use of classical adjustment methods in deformation monitoring network data processing is susceptible to the in-stability of reference points,thereby affecting the accuracy of the adjustment model.In this paper,MATLAB software is employed to select quasi-stable points using two methods:stable reference points and rank-deficient adjustment,and perform quasi-stable adjust-ment.Additionally,the stability of the selected quasi-stable points is tested using mathematical statistics.Using a deformation moni-toring network of a public railway bridge as a case study,this research discusses in detail these two methods of quasi-stable point se-lection and compares the results of quasi-stable adjustment with rank-deficient free network adjustment.The research findings indi-cate that the quasi-stable adjustment method achieves higher accuracy and the selection of quasi-stable points directly influences the accuracy of monitoring point variations in the quasi-stable adjustment.

关 键 词：拟稳平差 平均间隙法 稳定性分析 MATLAB 

分 类 号：P25[天文地球—测绘科学与技术] TB22[天文地球—大地测量学与测量工程]