Abstract
Given the prevalence of such scenarios worldwide, it is of the utmost importance for geotechnical practitioners to understand the behavior of a strip footing located over a pipe buried within a slope. This study focuses on investigating the failure mechanism of the footing-on-slope system, and a series of numerical simulations have been conducted using the material point method. The accuracy of the numerical model has been verified through comparisons with the results of model tests in the literature. The influence of the setback distance of the footing, burial depth of the pipe, and slope angle on the bearing capacity and failure modes has been analyzed in detail. The results demonstrate that the presence of the pipe reduces the bearing capacity of the strip footing. Meanwhile, the variations in the setback distance and slope angle may cause a reduction in the ultimate bearing capacity by 76% and 75%, respectively. The failure mode of the footing-on-slope system is determined by the pipe location, setback distance of the footing, and slope geometry. For shallow burial conditions, the pipe–soil interface can accelerate the development of failure surfaces. From the perspective of Mohr's circle, the principal stress deflects due to the applied pressure, resulting in different failure surface shapes. The schematic diagram of the failure mode can be used to predict the failure mechanism of the footing-on-slope system, thereby helping in the safe design of slopes with buried pipes.
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Data Availability Statement
All data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work is financially supported by the National Natural Science Foundation of China (Grant Nos. 42225703 and 42077235) and the Key Technologies Research and Development Program (Grant No. 2018YFC1505104).
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Published In
International Journal of Geomechanics
Volume 23 • Issue 11 • November 2023
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© 2023 American Society of Civil Engineers.
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Received: Nov 3, 2022
Accepted: May 1, 2023
Published online: Aug 28, 2023
Published in print: Nov 1, 2023
Discussion open until: Jan 28, 2024
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Cited by
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