3Lobo-Guerrero,S.,Vallejo,LK;Influence of pile shape and pile interaction on the crush-able behavior of granular materials around driven piles_DEM analyses.Granular Matter 9(2007)241-250.
4D.Sheng et al.Finite element analysis of pile installation using large-slip frictional con-tact[J].Computers and Geotechnies 32(2005)17-26.