DETERMINATION OF OPTIMUM SHAPE RATIO OF SINGLE GROUSER AND PREDICTION OF SOIL THRUST

摘要

The optimum shape ratio(1.5-1.65) of a single grouser was obtained from the relationship between the shape ratio of the grouser and the soil thrust as measured from the model tests with varied soil density and varied contact pressure for granite-weathered soil(SP). The soil thrust was numerically predicted using stress characteristic curves determined by the modified Sokolovsky's method considering the change of soil density and the velocity characteristic curves connecting the points of discontinuity of displacement. According to the results of the model tests and numerical analysis, the optimum shape ratio was found to increase with the contact pressure under the same density and the velocity characteristic curves showed a closer estimation of soil thrust and failure pattern to the test results than the stress characteristic curves.