CPⅢ区段搭接严密平差法研究

Research on Rigorous Adjustment Lapping between Adjacent of CPⅢ Plane Network

基于统计检验理论,对CPⅢ区段搭接严密平差法进行了进一步的研究分析,提出了新的搭接点对选择方法-坐标差异性检验法,并阐述了该方法的数学模型。通过理论分析和实例验证表明:在CPⅢ相邻区段搭接处理时,对搭接区段同名参数在前后两区段的测量平差值进行差异性检验,以此为基础选取搭接点对更为科学合理;在置信区间内的t(f)值越小,就越有理由认为坐标差异性不显著,当桩点的X、Y坐标差异性检验参数t(f)值均小于临界值时,可认为该点坐标没有明显差异,该点可作为搭接点,反之则不能;选取t(f)值较小的点作为搭接点,可以很好地实现相邻区段的平顺搭接。

On the basis of the theory of statistical detection and further research was made on the method of rig-orous adj ustment lapping between adj acent of CPⅢ.The new lapping point selection-coordinate difference detection method was put forward.The mathematical model of this method was expounded.Theoretical analysis and case study show as follows：It is more scientific and rational to choose lapping pairs of points derived from coordinate difference detection;in the confidence interval,the smaller the value of t（f）,the more reasons to believe that the coordinate difference is not significant;if the t（f）values of both of the X Y coordinate differences of a point are smaller than the threshold,it can be considered that no significant difference exists in the coordinates of the point and the point can be used as the bonding point,otherwise,it cannot be;selecting the point with a smaller value of t（f） as the bonding point can realize smooth laping of adj acent sections.