运营高铁线路平面控制网复测更新指标研究

Research on Route Horizontal Control Network Retesting Update Index of High-Speed Railways

基于现有的运营高铁线路平面控制网(route horizontal control network,CPⅡ)复测成果更新的双限差法,针对坐标较差与相邻点坐标差之差的相对精度超限严重不匹配的情况,提出改进多限差综合分析判定法进行CPⅡ网复测成果的更新综合分析。结合秩亏自由网平差及尺度变化参数对改进多限差综合分析判定法再分析进行验证,在成果更新上比双限差法更为科学合理,可为运营高铁精测网复测工作提供一定参考。

Based on the existing double-limit method of the route horizontal control network(CPII)retesting results update,for the case where the relative accuracy of the difference between the coordinate difference and the adjacent point coordinate difference is seriously mismatched,this paper propose an improved multi-limit comprehensive analysis and determination method to update analysis the renwal of CPII retest results.Combined with the example of rank-deficient free network adjustment and scale change parameters,the improved three-limit difference method is validated.It is proved that the Improved multi-limit comprehensive analysis and determination method is more scientific and reasonable than the double-limit method in the analysis of results update.The retesting work provides a certain reference.