Dynamic response analysis of liquefaction foundation treated by stone columns

Liquefaction foundation treated by stone columns is analyzed by the fully coupled three-dimension effective-stress dynamic analysis procedure; the influence law of stone columns design parameter on anti-liquefaction effect is discussed. The research shows that with the diameter of stone columns increasing, the surface maximum horizontal vibration acceleration and settlement of the soil of columns reduce, the excess pore water pressure decreases; with the spacing of columns increasing, the surface maximum horizontal vibration acceleration and settlement increase, and the excess pore water pressure ration increases too, the influence circle of stone columns is different in depth direction; the influence law of column length on anti-liquefaction nature is minor in superficial layer and is major in deep level.