流溪河拱坝实测变形性态分析

Analysis of the Liuxihe arch dam deflection behaviour

采用逐步回归分析方法，对流溪河拱坝３０年的实测变形资料进行了定性及定量分析，建立了多个测值系列的统计方程，提出了今后位移安全监控的参考指标及加强大坝变形监测的建议。分析认为此坝多年来的实测变形基本上是正常的，所反映的坝体结构性态是安全的，但径向位移存在着向上游方面的不可逆变化，而且各测点时效变化速率及累计值相差较大，是一个值得注意的问题。

The qualitative analysis and quantitative analysis have been carried out by the method of the stepwise regression analysis for the Liuxihe arch dam deflection data observed in the past thirty years. A lot of the statistiscal equations have been set up for the observed mumerical systems. The reference indices for the future safety control of dam deflection have been made and the proposals for strengthening the work of dam deflection monitoring have been put forward. The observed dam deflections of many years are in the main normal and the structural behaviour of the dam body is on the safe side. However, there exists the irreversible radial displacement in the upstream direction, and the time effect variations and the accumulative values of the different measuring points differ greatly. This is a problem needing attention.