Abstract:The artificial simulated rockfill is used to replace the natural rockfill for the experimental study, which can further study the influence of single factor such as particle shape on the mechanical properties of rockfill and particle breakage characteristics. Based on the triaxial test results of artificial simulated rockfill, the constitutive model parameters regression analysis is carried out, the particle crushing status of artificial simulated rockfill with different shapes is counted, and then the relationship between the particle shape and particle crushing is quantitatively studied. And the influence of particle crushing on the strength and deformation of rockfill is discussed. The results show that the Duncan-Chang constitutive model can fit the stress-strain curve of artificially simulated rockfill well. Its model parameters conform to the law of natural rockfill. There is a good linear relationship between the particle crushing rate and particle sphericity, and the variation of particle crushing rate with particle sphericity is basically the same under different confining pressures. With the increase of confining pressure, the particle crushing gradually increases and plays a dominant role, which makes the strength of rockfill reduce and the deformation increase.
