Study on Failure Mechanism of Soil–Rock Slope with FDM-DEM Method

Abstract

A discrete-continuous coupling analysis method based on FLAC2D/PFC2D is established with the help of the program’s own FISH language and Socket O/I data transfer interface. According to the statistical characteristics of the mesostructure of the slope site, the computer stochastic simulation method is used to construct the mesostructure model of the soil–rock mixture in the discrete domain. The deformation and failure mechanism of the SRM slope is studied by using the established discrete-continuous coupled analysis method. The results show that the statistical distribution of the mesoscopic contact characteristics (such as contact direction and contact force) between soil and rock particles inside the slope changes and adjusts significantly. Among them, the main direction of the statistical distribution is adjusted most significantly, and the main direction is finally adjusted to being basically the same as the sliding direction of the slope. The change in the mesoscopic contact characteristics between soil and rock particles is the internal driving factor for the macroscopic deformation of the slope and the adjustment of the stress state.

Study on deformation of tunnel pile foundation based on discrete element method and finite difference method

“…Qu et al [ 31 ] established a computational model using the coupled DEM-FDM method and realized the simulation of the whole process of shield construction. By using the coupling method, better results can be obtained in the study of pile and tunnel [ 32 , 33 ].…”

Study on the Reinforcement Mechanism of High-Energy-Level Dynamic Compaction Based on FDM–DEM Coupling

“…However, the necessity for mesh precision is significant when dealing with the dynamic problem of local impact load, and it is still difficult to fully reflect the local punching characteristics around the hammer. With the continuous development of numerical analysis technology, continuum-discrete coupling calculation methods, such as FDM-DEM coupling, provide a new possibility to solve the dynamic problem of local large deformation [33][34][35][36].…”