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对黏土的原状和重塑土样在三轴排水剪切试验条件下的蠕变性进行研究,试验方法包括改变加载应变率的单向加载试验、单向加载试验过程中的蠕变试验、卸载和重复加载过程的蠕变试验等。试验结果表明:1)黏土蠕变量大小与黏土试样的状态有关;2)黏土蠕变量大小与蠕变之前的应变率有关,蠕变前应变率越大,蠕变量就越大;3)黏土蠕变量大小与蠕变时所处的应力水平有关,所处的应力水平越高,蠕变量就越大;4)在重复加载过程中,随着应力水平的提高,黏土的蠕变表现出由负蠕变、中性蠕变到正蠕变的逐渐转化。
Creep properties of undisturbed and remolded clay samples under triaxial drainage shear tests were investigated. The test methods included unidirectional loading tests with varying loading strain rates, creep tests with unidirectional loading tests, And repeated loading process of creep test. The results show that: 1) the creep quantity of clay is related to the state of clay sample; 2) the creep quantity of clay is related to the strain rate before creep, the larger the strain rate before creep, the larger the creep quantity; 3) The amount of clay creep is related to the stress level at creep. The higher the stress level is, the larger the creep amount is. 4) During the repeated loading, as the stress level increases, Creep shows a gradual transformation from negative creep, neutral creep to positive creep.