An analytical method to predict the pullout response of geotextiles

摘要

ABSTRACT: Understanding the pullout mechanism of geotextiles is a key consideration innanalyzing the stability of geotextile/reinforced-soil structures. The analytical models developed basednon linear behavioral assumptions for the geotextile material stress–strain response have significantnlimitations in capturing the highly nonlinear pullout response observed in relatively extensiblengeotextiles. A new analytical model was developed combining the nonlinear responses of thengeotextile and soil–geotextile interface characteristics. The interface behavior was modelednconsidering the changes in normal stress on the planar geotextile due to constrained dilation of soilnand the subsequent frictional degradation behaviors at the interface. The analytical solution isnuseful in predicting the pullout resistances, strain, and mobilized frictional length along thengeotextile for a given magnitude of displacement. The suitability of the analytical formulation wasnverified by predicting the experimentally observed performance of several geotextile pullout testsnconducted with varying geotextile material and burial conditions. A simple chart and equationncapable of predicting strain and mobilized frictional length, respectively, for a given magnitude ofnrelative geotextile displacement are proposed, based on the research findings.