Simplified Approach to Estimate Lateral Load on Drilled Shafts Resulting from a Heavily Loaded Adjacent Shallow Foundation Using Horizontal Stress Isobars
Publication: International Journal of Geomechanics
Volume 16, Issue 1
Abstract
Growing urbanization is leading to more structures being constructed close to each other, resulting in substantial interaction between their foundations. Although the interaction between two shallow foundations and between piles in a pile group has been studied by several researchers, the effects of interaction between shallow and deep foundations are not very well understood or studied. Not much published literature is available for practicing engineers to analyze and design shallow and deep foundations that are constructed adjacent to each other. The second author of this paper was recently involved in a project in which a structure designed to be supported on drilled shafts was supposed to be constructed adjacent to another structure designed to be supported on a large mat foundation with high floor load. Although the authors have performed a detailed parametric study using finite-element techniques to better understand stress distributions and develop a simplified method to analyze this type of problem, this paper is only focused on estimating lateral stresses on the shafts and their lateral load analysis. A stress bulb for lateral stresses under a uniformly loaded square foundation is proposed, which is a significant tool for practicing engineers to understand lateral stress distribution below a uniformly loaded square area and estimate lateral stresses on nearby deep foundations.
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Acknowledgments
The authors would like to thank ANSYS for providing them access to the ANSYS Academic Research Mechanical Release 14.5 license. Thanks are also due to Dr. Om Agrawal and Dr. Vijay K. Puri, professors at Southern Illinois University Carbondale, and Dr. Shamsher Prakash, Professor Emeritus at Missouri S&T, for providing valuable help during analysis.
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Published In
International Journal of Geomechanics
Volume 16 • Issue 1 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jun 9, 2014
Accepted: Mar 17, 2015
Published online: Jun 17, 2015
Discussion open until: Nov 17, 2015
Published in print: Feb 1, 2016
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