Pullout performance of strip reinforcements used in mechanically stabilized earth walls

John Sankey, Robert Lozano

In the proceedings of: GeoMontréal 2013: 66th Canadian Geotechnical Conference; 11th joint with IAH-CNC

Session: Geosynthetics - Wall Reinforcement

ABSTRACT: For discrete reinforcing strips used in MSE walls, standards developed under the AASHTO codes have identified a method for evaluating pullout of ribbed steel reinforcements through conservative default values using a friction factor term identified as f*. A similar default basis for polymeric reinforcing strips is not available in AASHTO; only values meant for geotextiles and geogrids. The latest testing of high tenacity polymeric strips has demonstrated f* characteristics that are only slightly less than those found in steel reinforcing strips. As such, testing and a corresponding selection methodology for f* is advocated to reduce the inherent conservativeness in using default values. This paper will address pullout testing necessary to obtain f*, an evaluation basis for results and the expected outcome for f* in high tenacity polymeric strips based on physical characteristics of the backfill.

RÉSUMÉ: Pour les bandes discrètes de renforcement de sols utilisées dans les murs de soutènement, les normes développées armatures en acier nervurées grâce à des valeurs par défaut conservatives en utilisant un coefficient de frottement appelé f*. Le même raisonnement à partir de valeurs par défaut pour des bandes de reréalisés sur des bandes polymériques haute ténacité ont démontré des valeurs de f* qui ne sont que légèrement article portles valeurs de f* attendues dans le cas de bandes polymériques haute ténacité en fonction des caractéristiques physiques du remblai.

Access this article:
Canadian Geotechnical Society members can access to this article, along with all other Canadian Geotechnical Conference proceedings, in the Member Area. Conference proceedings are also available in many libraries.

Cite this article:
John Sankey; Robert Lozano (2013) Pullout performance of strip reinforcements used in mechanically stabilized earth walls in GEO2013. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GeoMon2013Paper204,author = John Sankey; Robert Lozano,title = Pullout performance of strip reinforcements used in mechanically stabilized earth walls ,year = 2013}