Design of Direct Embedment Foundations for Poles Under Moment Loads in Granular Soils

Prasad Yenumula1, *, Asim Haldar2, Chari T.R.3
1 Transmission Engineering-System Standards, Duke Energy, Raleigh, North Carolina, USA
2 Haldar and Associates Inc., St. John’s, Newfoundland, Canada
3 College of Engineering, Memorial University of Newfoundland, (Retired), St. John’s, Newfoundland, Canada

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© 2017 Yenumula et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the NCRH02, 410S. Wilmington Street, Duke Energy, Raleigh, NC-27601, USA; Tel: 919-546-5017; E-mail:



The design of direct embedment pole foundations involves calculating the ultimate moment capacity and deflections/rotations of pole foundations at groundline.


A theoretical model based on rigid piles is used as a basis for developing equations for the ultimate moment capacity of direct embedment pole foundation installed in granular soils.

Results and Conclusion:

The steps involved in the development are presented in this paper. Prototype test data are used to compare the predictions of the model and to validate the proposed method.

Keywords: Direct embedment, Moment capacity, Pole foundations, Granular soils, Rigid piles, Prototype.