Abstract:

The residual deformation behaviors of sandy gravel with two kinds of grain size composition were experimentally studied by use of GDS dynamic triaxial system. It is shown that the most residual shear strain and residual volumetric strain under low cell pressure have good linear relationships with lg(1+N ), and they also have linear relationships under high cell pressure when the dynamic stress level is low. But with the increase of dynamic stress level, the dispersion of test results become larger. However, under the same initial state, the resistance of materials to dynamic load becomes stronger with the increase of coarse grain.

Key words: sandy gravel, grain size composition, residual shear strain, residual volumetric strain