Friction and Passive Resistance of Geogrid in Pullout Tests

摘要

The total pullout resistance of geogrid in a soil includes two components: (1) the interface friction resistance that takes place along longitudinal ribs and (2) the passive resistance that takes place against the front of transverse ribs. A series of pullout tests and analyses were conducted to quantify the contributions of the above two components to the overall pullout resistance. It was found that the mobilized passive resistance is much higher than the friction resistance under the same test conditions. Furthermore, the values of these two components are influenced by both pullout displacement and normal stress to a large extent.