EN FR
GeoConferences.ca

Influence of suction on the pull-out capacity of grouted soil nails

Naresh Gurpersaud, Sai K. Vanapalli, Siva Sivathalayan

In the proceedings of: GEO2010 Calgary: 63rd Canadian Geotechnical Conference & 6th Canadian Permafrost Conference

Session: W3-C

ABSTRACT: The design of soil nail systems used in engineering practice is either based on conventional soil mechanics or empirical procedures ignoring the influence of suction. In this paper, a comprehensive experimental investigation was undertaken, using a specially designed equipment to understand the influence of suction on the pull-out capacity of soil nails placed in compacted sand. The results of the study show that the pull-out capacity of soil nails is significantly influenced due to the contribution of suction. A methodology is proposed for estimating the variation of the pull-out capacity of soil nails with respect to suction. The soil-water characteristic curve (SWCC) along with the saturated shear strength parameters are required in the proposed method. The proposed technique is simple and will allow for better optimization of the grout-soil adhesion and provide a reasonable estimate of the pull-out capacity of soil nails.

RÉSUMÉ: La conception de systèmes de sol clouté dans la pratique géotechnique est basée soit sur la mécanique des sols conventionnelle, our sur des procédures empiriques ignorant l'influence de la succion. Dans cet article, un programme expérimental détaillé a été entrepris, en utilisant de l'équipement spécialement conçu, afin de comprendre l' influence de la succion sur la capacité. d'arrachement des clous enfoncés dans un sable compacté. Les résultats de l'étude démontrent que la capacité d'arrachement des clous est influencée de manière significative par la contribution de la succion. On propose une méthodologie pour estimer la variation de la capacité d'arrachement de clous en fonction de la succion. La courbe de rétention d'eau (SWCC) ainsi que les paramètres de la capacité de résistance pour le sol saturé sont requis par la méthode proposée. La technique proposée est simple et permet de mieux optimiser l'adhésion sol-clou et fournir un estimé raisonnable de la capacité d'arrachement des clous. 1 INTRODUCTION

Please include this code when submitting a data update: GEO2010_226

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:
Naresh Gurpersaud; Sai K. Vanapalli; Siva Sivathalayan (2010) Influence of suction on the pull-out capacity of grouted soil nails in GEO2010. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO2010_233, author = Naresh Gurpersaud; Sai K. Vanapalli; Siva Sivathalayan,
title = Influence of suction on the pull-out capacity of grouted soil nails,
year = 2010
}