Deformation predictions and control methods for excavation of deep foundation pits

The excavation deformation of deep foundation pits is predicted by 5 kinds of different models. Compared with the test data, the results show that the short-term prediction accuracy of the metabolic GM(1,1) model, grey Markov chain model and BP model can meet the requirements of the engineering. But their long-term prediction accuracy is unreliable. It is proved that the residual GM(1,1) model and the grey Markov chain model are suitable for the medium-term and long-term predictions. The excavation deformation control methods for deep foundation pits are summarized