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Geomechanics and Engineering
  Volume 5, Number 4, August 2013 , pages 299-312
DOI: https://doi.org/10.12989/gae.2013.5.4.299
 


Horizontal pullout capacity of a group of two vertical plate anchors in clay
Paramita Bhattacharya and Jyant Kumar

 
Abstract
    The horizontal pullout capacity of a group of two vertical strip plate anchors, placed along the same vertical plane, in a fully cohesive soil has been computed by using the lower bound finite element limit analysis. The effect of spacing between the plate anchors on the magnitude of total group failure load (PuT) has been evaluated. An increase of soil cohesion with depth has also been incorporated in the analysis. For a weightless medium, the total pullout resistance of the group becomes maximum corresponding to a certain optimum spacing between the anchor plates which has been found to vary generally between 0.5B and B; where B is the width of the anchor plate. As compared to a single plate anchor, the increase in the pullout resistance for a group of two anchors becomes greater at a higher embedment ratio. The effect of soil unit weight has also been analyzed. It is noted that the interference effect on the pullout resistance increases further with an increase in the unit weight of soil mass.
 
Key Words
    anchors; clays; failure; finite elements; limit analysis; pullout load
 
Address
1 Paramita Bhattacharya: Civil Engineering Dept., Indian Institute of Technology Kharagpur, INDIA 721302;
2 Jyant Kumar: Civil Engineering Dept., Indian Institute of Science Bangalore, INDIA - 560012
 

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