Abstract: Based on Fisher discriminant theory, the Fisher discriminant analysis (FDA) model was established for forecasting the possibility of sand liquefaction. Eight factors were selected such as seismic intensity, epicenteral distance, groundwater level, sand depth, blow number of standard penetration test, mean granular diameter, coefficient of nonuniformity, ratio of shearing stress to effective overburden stress as the discriminant factors of the FDA model. A series of experimental data of sand liquefaction were taken as the training and testing samples, then some other practical data were used to verify this model. The results show that the FDA model is a simple, feasible and high accurate prediction method; and it is one of the efficient methods for solving prediction of sand liquefaction.

Key words: soil mechanics, sand liquefaction;prediction, Fisher discriminant analysis(FDA)