不同定权方法下隧道平面控制网平差结果分析

摘要

Traditional tunnel cave plane control network adjustment falls into experience weighting and variance component estimation weighting .Which one of the two can refect the right adjustment calculation method has been yet debated .To solve this problem ,this paper studies different weighting methods in horizontal control network adjustment of several tunnel caves inside and carris out the calculation and analysis of the real data . Conclusion is obtained in the tunnel plan control adjustment the experience weighting is better than variance component estimation weighting .%传统隧道洞内平面控制网平差定权分为经验定权和方差分量估计定权两种。采用哪种定权方法更能反映出洞内控制网的实际精度，业内一直没有定论。文中通过对长大隧道洞内平面控制网平差时不同定权方法的研究，并进行多座长大隧道洞内控制网实测数据的计算分析对比，得出在隧道洞内平面控制测量平差计算中，经验定权优于方差分量估计定权的结论。