本文从粉土具有砂土与粘性土的双重特怔的观点出发，针对饱和粉土在地震作用下液化 的问题，采用静力触探(CPT)参数(端阻&侧摩阻7,及其摩阻比i?/)进行判别，建立了液化判别的 上限判别式和下限判别式，确定了饱和粉土的液化界线，经75组不同地震烈度区资料验证，判别 成功率达85.3%。

From the point of view that the silt has twofold character of sand and cohesive clay,aimed at the saturated liquefied under the seismic loading，distinguishing with the cone penetration test parameters (core resistance qc，side friction fs , ratio Rf between side friction and cone resistance),the upper and lower limit discriminiant of liquefaction distinguishing is established and liquefying boundary of saturated lilt is defined in this paper. Its distinguish?ing success probability is to 85. 3% which is verified by 75 groups in the different seismic in?tensive regions.