关键词: 滑坡, 粗粒土, 蠕变特性, 三轴蠕变试验, 蠕变模型

Abstract: In order to provide the basement of a further numerical analysis, a series of large-scale triaxial creep tests is performed on gravel-soil obtained from sliding mass of Majiagou landslide in the Three Gorges area. The test results show that the tested gravel-soil is a typical creep material, and its creep deformation characteristics are very obvious. The soil experienced two creep stages, i.e., the decay creep stage and constant speed creep stage. The data also indicate that confining stress and stress level have an effect on the creep characteristics of soil. Based on these tests, the Singh-Mitchell model is used to predict the creep strain. Compared with the original test data, the Singh-Mitchell model results have good agreement with the experimental data.

Key words: landslide, gravel-soil, creep properties, triaxial creep tests, creep model landslide, gravel-soil, creep properties, triaxial creep tests, creep model