基于坐标转换的高铁平面精测网复测稳定性分析方法探讨

Discussion on Reanalysis Stability Analysis Method of High-speed Rail Plane Precise Surveying Network Based on Coordinate Transformation

首先介绍了现有各级平面精测网复测稳定性分析的常规方法,然后结合GRP网中判别CPⅢ点稳定性的方法,尝试使用三参数坐标转换进行高铁平面精测网复测稳定性分析,最后以某高铁CPI控制网实测数据为例进行分析。结果表明,不能完全使用三参数坐标转换代替常规方法进行精测网的稳定性分析,但可在使用坐标转换后的点位残差进行稳定性评价时,结合常规法进行综合分析,可提高常规法分析判别效率。

Firstly,the conventional methods for the stability analysis of the re-testing of the existing plane precise surveying network at all levels are introduced,and then combined with the method of judging the stability of the CPIII point in the GRP network,an attempt is made to use three-parameter coordinate transformation for the re-testing stability analysis of the high-speed rail plane precise surveying network.Finally,the measured data from a high-speed rail CPI control network is taken as an example for analysis.The results show that the three-parameter coordinate transformation cannot be used instead of the conventional method for stability analysis of the Precise surveying network.However,when the point residuals after coordinate transformation are used for stability evaluation,the comprehensive analysis combined with the conventional method can improve the analysis and discrimination efficiency of conventional methods.