Experimental Study on Accumulated Deformation Characteristic of Yellow River Silt Under Long-Term Dynamic Loading

In order to study accumulated deformation characteristic of Yellow River silt under long-term cyclic loading, a series of dynamic triaxial test was conducted. The effects of confining pressure, relative density, loading frequency and cyclic stress ratio on accumulated deformation behavior were studied. The results show that the accumulated strain increases as the confining pressure and cyclic stress ratio increase. The increment of relative density and loading frequency will restrain the increase of accumulated strain. Based on test results, accumulative strain prediction model that can reflect the effects of confining pressure, relative density, loading frequency and cyclic stress ratio was proposed. By comparing the measured curve and the predicted curve of accumulated strain, it can be concluded that the prediction model developed in this study is applicable for the Yellow River silt. These findings offers some insight into the deformation estimation and prediction of subgrade with Yellow River silt.