钢珠模拟堆石料三轴试验研究

he major factor that affects the strength and deformation of rockfill materials is particle sliding. Based on triaxial tests of artificial rockfill materials of steel balls, the effect of micromechanics on strength and deformation of rockfill materials is investigated. The results show that the Mohr-Coulomb’s strength envelope of uncrushed artificial rockfill materials is a line passing through the origin point. Before the peak strength, the deformation of uncrushed artificial rockfill materials is mainly induced by particle sliding, which is satisfied with the Rowe’s dilatancy equation. After the peak strength, the dilatancy of soil is reduced by the local unstable deformation resulting from the collapse of particle group interlocking, so the dilatancy deformation of rockfill materials will be overestimated by the Rowe’s dilatancy equation. The modified Rowe’s dilatancy equation will be more adaptive to the unsliding deformation of particles.