Based on the assumption that the behavior of surrounding rock conforms to the rule of Kelvin-Voigt model, this paper presents a method to determine the parameters related to the time-dependent properties of surrounding rock and predict the ground displacement by analyzing the measured data from a test tunnel of an underground hydro-power station cavern, which includes that the measured data is revised to consider the space effect of excavation face, that the total displacement value is treated by regression to get the expressions of displacement-time curves, that the formula to describe the relation between equivalent elastic modulus of surrounding rock and the displacement value at different moments is established, then the method to determine the parameters of Kelvin-Voigt model and predict the displacement of surrounding rock of the test tunnel is put forward. The case study shows that the predicted displacement by the method is close to the measured value, so the method can be adopted in practice.
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