부산대학교 도서관

In the present study, a multiscale model was developed to investigate the failure process of a soft rock slope due to the change in rock microstructure (e.g. micro-fissure and pore development) over time. Through developing a coupled fissure and pore seepage particle discrete element model (DEM), the effects of the development of micro-fissures and pores on the stability of a soft rock slope were modelled by establishing the relationship between macroscopic mechanical properties of the soft rock and the microstructure characteristics of the rock. To validate the model, the three-dimensional geological model of a soft rock slope of a highway was developed to investigate the stability of the slope. While the DEM of pores and particles was developed based on the scanning electron microscopy (SEM) images of the rock samples of the slope, a granular DEM of coupled fissure–pore seepage was introduced to model the development of seepage channels based on time-dependent change in pores and micro-fractures. It shows that the numerical predictions fit the field monitoring data reasonably well. Furthermore, it demonstrates that the developed multiscale model has the capability of predicting the different stages of seepage-induced failure of the soft rock slopes. [ABSTRACT FROM AUTHOR]