Experimental Research on the Creep Behavior of the Interface of Compacted Loess and High-Density Polyethylene Geogrid

The stability of geogrid-reinforced soil structure is closely related to the interface characteristics between geogrid and soil. However, creep behavior soil–geogrid still unrevealed. In this study, using a modified stress-controlled pullout device, influence normal pressure, dry density, water content on compacted loess high-density polyethylene (HDPE) investigated. A three-parameter empirical model Merchant element were established through fitting analysis. Analysis results show that have significant effects shear displacement reinforced interface. Under same level, increases with increase decreases density pressure. Both can describe more accurate in early stage, while suitable for predicting long-term deformation geogrid.