Evaluation of the Safety Factor of Damaged Geogrid Reinforced Soil Wall

摘要

Recent huge earthquakes have caused severe and small damage to a number ofrngeogrid-reinforced soil walls. For proper repair or reconstruction, it is necessary to evaluate degree of damagernof those structures. In this research, the pullout test of geogrid subjected to the unloading-reloading process wasrncarried out to learn its effects on the pullout resistance. The results were then used to evaluate the factor ofrnsafety and sliding surface of the damaged geogrid reinforced soil wall. GRSW models in centrifuge shakingrnand tilting table tests under 50G were performed. The damaged GRSW models were first achieved by bothrnshaking and tilting. The damaged GRSW were then subjected to unloading-reloading process until the fullrncollapse occurred. The pullout peak value and residual value using in current design of GRSW were alsorndiscussed.