Arch dam deformation condition monitoring method

The invention belongs to the field of hydraulic structure safety monitoring, and particularly relates to an arch dam deformation behavior monitoring method which comprises the following steps: establishing an arch dam deformation deterministic model; performing decomposition and multi-scale calculation on a residual sequence of the arch dam deformation deterministic model; performing GRULSTM prediction on the residual sequence high-frequency signal, and performing ARIMA prediction on the residual sequence low-frequency signal; the predicted values of the residual sequence high-frequency signal and the residual sequence low-frequency signal are superposed to prediction of an arch dam deformation deterministic model, and a predicted value of arch dam deformation is obtained; according to the arch dam deformation prediction method, the arch dam deformation deterministic model is studied through residual analysis of the arch dam deterministic model, and finally the arch dam deformation prediction value is obtaine