Pullout tests are necessary in order to study the interaction behaviour between soil and geosynthetics in the anchorage zone, hence, the test results have direct implications in the design of reinforced soil structures. This paper presents an evaluation of the soil-geogrid interaction, conducted to quantify the contributions of the frictional and the bearing components of the pullout resistance of geogrids. Based on the data obtained by authors, a stress transfer model has been implemented to predict the results of large-scale pullout tests using the load transfer curves approach. In particular, in the proposed stress transfer model the geometry of the elements on which the bearing resistance mobilizes, the soil dilatancy effects, the geogrid extensibility and the interference phenomena (between transversal bearing members) are taken into account. The comparison between theoretical and experimental results shows a good agreement, thus confirming the reliability of the proposed approach.
A stress transfer model to predict the pullout resistance of extruded geogrids embedded in compacted granular soils
Gioffre D.;
2014-01-01
Abstract
Pullout tests are necessary in order to study the interaction behaviour between soil and geosynthetics in the anchorage zone, hence, the test results have direct implications in the design of reinforced soil structures. This paper presents an evaluation of the soil-geogrid interaction, conducted to quantify the contributions of the frictional and the bearing components of the pullout resistance of geogrids. Based on the data obtained by authors, a stress transfer model has been implemented to predict the results of large-scale pullout tests using the load transfer curves approach. In particular, in the proposed stress transfer model the geometry of the elements on which the bearing resistance mobilizes, the soil dilatancy effects, the geogrid extensibility and the interference phenomena (between transversal bearing members) are taken into account. The comparison between theoretical and experimental results shows a good agreement, thus confirming the reliability of the proposed approach.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.