计算地基的变形时应该采用排水条件下的应力—应变关系,这就需要进行排水三轴压缩试验。但由于种种原因,这种试验难于推广。为了寻找排水和不排水试验应力—应变曲线的关系,本文通过上海金山海堤软粘土的三轴试验结果发现两种试验曲线的关系可以用一简单的公式表示出来。本文还从弹性理论出发同样导出了上述公式,并确定出上海粘土的该公式所包含的两个参数。 When calculating the deformation of the foundation, the stress-strain relationship under drainage conditions should be used. This requires a drainage triaxial compression test. However, due to various reasons, this test is difficult to promote. In order to find out the relationship between drainage and undrained test stress-strain curves, the results of the triaxial test of Shanghai Jinshan seawall soft clay show that the relationship between the two test curves can be expressed by a simple formula. This article also derives the above formula from the elasticity theory and determines two parameters contained in the formula of Shanghai clay.