Experimental study on the interfacial friction behavior of geogrids in silt mixing rubble

Abstract

Geogrids with well-known engineering properties have been widely used in geogrids-reinforced earth structures. But reinforced capability of geogrids in the silt is not well. A series of pullout tests to investigate the Interfacial friction behavior of geogrids in silt mixing rubble are conducted in the laboratory under different normal stress and rubble content. By analyzing experimental datum, some conclusions were made that increasing normal stress on silt is not effective method to raise interfacial shear resistance; adding rubble content in slit can greatly improve the passive resistance of the transverse ribs and pullout resistance of geogrids. The study is of referring value for design of geogrids-reinforced earth structure. © 2008 Science Press Beijing and Springer-Verlag GmbH Berlin Heidelberg Geotechnical Engineering for Disaster Mitigation and Rehabilitation.