针对大坝长期变形监测数据序列往往存在异常现象而不能直接采用白塞尔公式计算变形监测中误差,分析了白塞尔公式在大坝变形监测中误差计算中的适用条件,提出了采用监测数学模型计算测值异常条件下变形监测中误差的方法,分别给出了变形测值存在突变及趋势性变化条件下中误差计算的实例,为大坝长期变形监测精度评价提供了一种新的符合实际的计算方法。 For the long-term deformation monitoring data series of dam often there is anomaly and can not directly use the Whitehead formula to calculate the error in the deformation monitoring, analysis of the application of the Whitehead formula in dam deformation monitoring errors in the application of conditions, the use of monitoring mathematics The model calculates the error in the deformation monitoring under the abnormal condition of the measurement, and gives examples of the calculation of the median error under the condition of the change of the deformation measurement and the change of the trend respectively. This provides a new conformity for the dam long-term deformation monitoring accuracy evaluation The actual calculation method.