The Influence of Vertical Effective Stress and Geogrid Length on Interface Behavior under Pullout Conditions

The effects of both vertical effective stresses and geosythentic length on the soil-reinforcement interaction under static pullout loading conditions are analyzed in the article. The article reports the results of pullout tests that were carried out on two extensible geogrids embedded in a compacted granular soil by using peak pullout resistance. The use of geosynthetics has many advantages over other soil strengthening techniques due to technical, economic, and sustainability issues. The article discusses how pullout test are commonly used to study the complex three-dimensional (3-D) interaction mechanisms between soil and geogrid in the anchorage zone. The parameters that influence pullout behavior are soil relative density, pore size distribution and vertical effective stresses. The geometry and thickness of the bearing ribs, the mesh size and the longitudinal and transverse members' stiffness are an important factor in soil-geogrid interaction. The article also presents some considerations regarding deformation behavior.