Application of Improved Metabolic GM Model in Analyzing Settlement of Earth-rock Dam in the Period of Construction

When analyzing the settlement which is influenced by multi-factors such as speed up construction, sharp increase in load and rainfall etc. in the period of earth-rock dam, the disturbance factors that continue to enter the system should be considered, and the metabolic GM (1, 1) model is introduced to improve the fitting and prediction accuracy. Because the background value of the traditional GM (1, 1) model has some deviation, this paper further improves the fitting and prediction accuracy through making the calculated method of background value better. Finally, the effectiveness of improved metabolic GM (1, 1) model is verified through an example.