The main mechanism of rockfill rheology can be attributed to the rockfill deterioration due to variation of water level

rainfall infiltration

weathering and other environmental factors. At the same time

the particles have high contact stress-broken and rearrange-stress release

adjustment and transfer

this process incessancy owning to the continuous particle degradation. In the framework of deformable discrete element method

the stochastic granular discontinuous deformation method(SGDD) considering particle breakage is employed with the introduction of the strength degradation model to reflect the particle degradation. The method is employed to rockfill triaxial creep numerical experiments; the simulation results are consistent with indoor test ones. It is shown that the SGDD method considering rockfill creep caught the main mechanism

is suitable for simulation of rockfill creep deformation. Numerical experimental results show that with the external environment the degradation degree

degradation rate

parent rocks intensity has great influence on the macroscopic rheological deformation.