CURRENT STATURE AND TRENDS ON THE STUDY OF SAND CREEP

Laboratory tests, field observations and engineering accidents have shown that sand exhibits long-term deformation like soft clay. These issues deserve our in-depth study. For further understanding of sand creep, the mechanism of creep is first discussed from macroscopic and microscopic viewpoints, results show that sand creep is caused mainly by the mechanism of particle reorganization and particle breakage. Then, creep characteristics are analyzed from internal and external factors, and the creep characteristics under both 1D and 3D creep tests are analyzed. Water content, pore water properties, stress history, stress path and size have a certain effect on sand creep. Finally, the creep models are analyzed from macroscopic and microscopic viewpoints, and a future prospect of sand creep is discussed. In the study of sand creep, discrete element method is an important way for future research. At the same time, experimental research, theoretical analysis and numerical analysis can be combined to carry out further research. Creep of sandy soil will be one of the major research directions for soil mechanics in the future.