American Society of Civil Engineers

The Ultimate Uplift Capacity of Multi-Plate Anchors in Undrained Clay

by Richard Merifield, A.M.ASCE, (Senior Lecturer, Centre for Geotechnical & Materials Modelling, School of Engineering, The University of Newcastle, NSW 2308 E-mail: and Colin Smith, M.ASCE, (Senior Lecturer, Department of Civil and Structural Engineering, University of Sheffield, Sir Frederick Mappin Building, Mappin Street, Sheffield, S1 3JD E-mail:
Section: Soil Behavior, pp. 74-79, (doi:

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Document type: Conference Proceeding Paper
Part of: Soil Behavior and Geo-Micromechanics
Abstract: Soil anchors are commonly used as foundation systems for structures requiring uplift resistance such as transmission towers, or for structures requiring lateral resistance, such as sheet pile walls. Anchors commonly have more than one plate or bearing element and therefore there is a complex interaction between adjacent plates due to overlapping stress zones. This interaction will affect the failure mode and ultimate capacity. However, no thorough numerical analyses have been performed to determine the ultimate pullout loads of multi—plate anchors. The primary aim of this research paper is to use numerical modelling techniques to better understand plane strain multi-plate anchor foundation behaviour in clay soils.

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