拱坝垂线观测数据处理方法的改进

Improved Monitoring Data Processing Method of Plumbline for Arch Dams

对拱坝垂线观测数据处理方法的改进进行探讨。首先,对大坝安全工作中拱坝垂线观测数据的现状处理方法进行分析;在此基础上提出了基于矢量叠加的改进处理方法;最后,某300 m级拱坝算例分析结果表明,现状拱坝垂线观测数据处理方法将导致切向位移显著大于精确计算值,径向位移略小于精确计算值,并且切向位移分布规律也明显不同于精确计算情况,建议今后大坝安全监测工作中对于拱坝垂线观测数据采用改进方法进行处理。

The improved monitoring data processing method of plumbline for arch dams is discussed.Firstly,current data processing method is analyzed,and on this basis,an improved algorithm based on vector superposition is proposed.Finally,an arch dam with dam height about 300 m is taken as case study,and the analysis results prove that the tangential displacement calculated by current method is much larger than the accurate calculated value by improved algorithm while the radial displacement is slightly larger,and moreover,the distribution of tangential displacement is also obviously different from the result of accurate calculation.As a result,the improved method should be adopted to deal with the monitoring data of plumbline for arch dams in future dam monitoring.