Abstract
Pullout tests are effective to investigate the interaction mechanism along the interface in geogrid reinforced zone. Micro scale geogrid-soil interactions are one of the fundamental important issues in pullout test response as well as actual field behavior of earth reinforcement. Hence, the discrete element analysis is carried out for pullout test from a micro point of view. The discrete element model is conducted to investigate the pullout response paying attention to compaction effect linked with porosity. The specimen is investigated in different porosities in order to evaluate the influence of degree of compaction on the strength, linked with the interface microscopic behavior. And the dilatancy predicted in the model may also provide useful information on the increase of the interface shear resistance.
