Measurement of pile uplift forces due to soil heave in expansive clays
Author | Burke, T.S. da Silva |
Author | Jacobsz, S.W. |
Author | Elshafie, M.Z.E.B. |
Author | Osman, A.S. |
Available date | 2024-08-05T07:19:20Z |
Publication Date | 2022 |
Publication Name | Canadian Geotechnical Journal |
Resource | Scopus |
ISSN | 83674 |
Abstract | Piled foundations are widely used to limit the movement of foundations in expansive clays. These piles are subjected to large uplift forces as the clay swells (and downdrag forces when it shrinks). The appropriate method to estimate these forces is not well understood, and estimates from various methods presented in literature result in large variations. The uplift force generated in piles by soil heave was derived from strain measurements in full-scale field tests where a pile was installed in a highly expansive soil profile and flooded for several months. The results were compared to available theoretical estimates to comment on the most appropriate procedure to estimate the generated tension in the pile. The results showed that the use of an elastic solution related to the expected soil heave combined with a limiting shaft friction estimated from total stress capacity methods provided the most appropriate match to the measured results both in terms of the magnitude of the developed tension in the pile and shape of the tension profile along the depth of the pile. |
Sponsor | The authors gratefully acknowledge the financial support from the UK Engineering and Physical Sciences Research Council (EPSRC) Global Challenges Fund under the Wind Africa project, Grant Ref: EP/P029434/1. The following people are acknowledged for assistance and support in the field installation: Neale Baardjies and Bethuel Mphasa from Yel-lowstar Mining; Sarel Coetzer, Rikus Kock (in memoriam), and Dr. Gerrit Smit from the University of Pretoria; and Dr. Khalid Abdalla and Dr. Nicky de Battista from the University of Cambridge. Prof. Gerhard Heymann from the University of Pretoria is thanked for the provision of the CSW test results. Lucy Eost and Dr. Tiago Gaspar from Durham University are thanked for the provision of the SWRC and shrinkage test results. |
Language | en |
Publisher | Canadian Science Publishing |
Subject | expansive clay field testing piled foundations |
Type | Article |
Pagination | 2119-2134 |
Issue Number | 12 |
Volume Number | 59 |
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Civil & Architectural Engineering [769 items ]