Prediction of the End-Bearing Capacity of Axially Loaded Piles in Saturated and Unsaturated Soils Based on the Stress Characteristics Method
Publication: International Journal of Geomechanics
Volume 23, Issue 7
Abstract
This study proposed an analytical approach for predicting the end-bearing capacity of driven piles that are subjected to axial loads in saturated and unsaturated soils. This is a generalized approach in which the stress characteristic method is employed successfully for both saturated and unsaturated soils. An iterative technique computer code was developed for the proposed analytical approach extending the finite difference method to develop solutions with the aid of MATLAB (version 2019a) that provides graphical output to visualize the results. The results from the proposed approach were compared against measurements for 13 pile load tests that include 11 in saturated soils and 2 in unsaturated soils, with good agreement. In addition, numerical analyses were performed using ABAQUS (version 6.14) to simulate the driven pile penetration and pile loading by employing the arbitrary Lagrangian–Eulerian adaptive mesh methods. The comparisons between the numerical predictions and measurements from a published model pile test suggested that the ultimate bearing capacity is well predicted by the finite-element model in comparison to the proposed analytical method. However, the proposed analytical method was simple for use in engineering practice applications to estimate the end-bearing capacity of pile foundations in both saturated and unsaturated soils.
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Data Availability Statement
All data, models, or codes generated or used during the study are available from the corresponding author upon reasonable request. All data that support all the figures and tables can be provided on request.
Acknowledgments
The authors thank the reviewers for providing valuable comments and suggestions, which helped to significantly improve the quality of the manuscript. The corresponding author Prof. Sai Vanapalli acknowledges the Natural Science and Engineering Research Council of Canada for the research funding for this project (RGPIN-2020-05808). Also, the authors appreciate the China Scholarship Council and the University of Ottawa, Canada for the Ph.D. research programs for Xinting Cheng.
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International Journal of Geomechanics
Volume 23 • Issue 7 • July 2023
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© 2023 American Society of Civil Engineers.
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Received: Apr 28, 2022
Accepted: Feb 17, 2023
Published online: May 12, 2023
Published in print: Jul 1, 2023
Discussion open until: Oct 12, 2023
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