首先对目前常见的饱和砂土液化判别准则的适用性进行了讨论。结果表明 ,由于实际的饱和砂土与室内试样在受力条件和变形约束条件上均存在着相当大的差异 ,因此 ,这些准则一般不能直接用于土体的液化分析。根据液化的定义 ,笔者推出了一种统一的判别准则 First of all, the applicability of the current discriminant criteria for liquefaction of saturated sand is discussed. The results show that these criteria are not generally applicable to the analysis of soil liquefaction because of the considerable differences between the actual saturated sand and the indoor specimens under stress and deformation constraints. According to the definition of liquefaction, the author has introduced a unified criterion of discrimination