监控量测是掌握隧道施工中围岩动态变化过程的手段，通过对监控数据的回归分析可以预测围岩的最终位移等，进而有效地指导隧道设计与施工。讨论可以作为回归函数的类型，把函数U=A-Bln(1/t+C)作为回归分析函数，从理论上分析是合理的，工程实例证明也是有效的。提出选择回归分析函数的原则。通过改变常数C使拟合残差平方和更小，从而使回归效果更加符合实际，对隧道施工监控量测数据分析具有一定的指导意义。

Monitoring is an important means to obtain the dynamic behavior of the surrounding rock mass during tunnel construction. The ultimate displacement of the surrounding rock mass can be predicted by regression analysis on the monitoring data, which can provide effective guidance for the design and construction of tunnels. The types of functions that can be used as regression functions are discussed in the paper. It is theoretically reasonable and practically effective to take function U=A-Bln(1/t+C) as a regression function. The principle for regression analysis function selection is proposed in the paper. The fitted residual sum of the squares can be minimized by varying constant C so that the regression results can be more realistic. The paper can provide reference for the analysis of the monitoring results of tunnel works.