Prediction of sand liquefaction based on distance discriminant analysis and its application

Based on the principle of Mahalanobis distance discriminant analysis,the distance analytic model was applied to the prediction of sand liquefaction with eight factors listed as follows: mean diameter,coefficient of non-uniformity,blow number of standard penetration test,underground water depth,sand depth,ratio of shearing stress to effective overburden stress,seismic intensity,epicenteral distance.Through computing practical examples and assessing the model,the model was manifested to be scientific and effective with much more accurate results than the normalization methods and simplified Seed method.It was shown that the present method was efficient in solving the prediction of sand liquefaction and could be applied to practical engineering.