分析了等向固结不排水三轴压缩总应力强度指标的３种应用形式，指出了将该类指标应用于地基时存在的问题，定义并建立了模拟实际地基中应力条件时ＣＵ试验（广义ＣＵ试验）的总应力强度指标和其表达式，分析了其影响因素和变化规律．随后建立了与σｆｆ，σ′ｆｃ，σ′ｆ对应的抗剪强度指标表达式，最后初步分析了等向固结不排水三轴压缩指标在实际工程中应用的误差 Three kinds of application forms of total stress intensity index of undrained triaxial compression under undrained consolidation are analyzed. The problems existing when applying this kind of indexes to foundation are pointed out. The CU test (generalized CU test) the total stress intensity index and its expression, analysis of its influencing factors and changes in law. Then the expression of shear strength index corresponding to σff, σ’fc, σ’f is established. Finally, the error of practical application of isokinetic undrained triaxial compression index