Investigation on the Influencing Factors of K0 of Granular Materials Using Discrete Element Modelling

Earth pressure coefficient at rest K0 is commonly estimated by empirical equations, which to date has had insufficient accuracy and universality. For better prediction, the investigation on factors influencing required. A series of discrete element method (DEM) simulations oedometer tests are conducted verify key granular materials. The influences initial fabric anisotropy, particle shape, void ratio, inter-particle friction angle investigated. evolution microstructure monitored during reveal relationship between values. results show that effect anisotropy exists but limited. Particle all significantly affect values alone. According DEM results, an attempt made propose a more reasonable equation in function relative density, critical state angle, “shape factor”. This new higher can consider inspiring determination practical engineering.