End-Bearing Capacity of Embedded Piles with Inclined-Base Plate: Laboratory Model Tests
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 146, Issue 8
Abstract
The objective of this study is to investigate the effects of an inclined base plate on the end bearing capacity of embedded piles and soil behavior below a pile base according to the vertical stress and inclination angle of the base plate. Two types of model piles were prepared: a conventional pile with a flat base plate with a diameter of 50 mm and piles with an inclined base plate with a diameter of 56 mm. Load tests were conducted using model piles with a diameter of 50 mm incorporated with load cells and bender elements in a calibration chamber. The end bearing capacity, unit end bearing capacity, and shear wave velocity increase for all model piles with an increase in the vertical stress and in the inclination angle. The increment in the end bearing capacity may result from the increased projected area, the increased contact area between the inclined base plate and soil, and increased horizontal effective stress. The unit end bearing capacity also demonstrates a good relationship with the shear wave velocity, which is a function of the horizontal effective stress below the pile base. This study suggests that piles with inclined base plates may be effectively used in the embedded pile method to improve the end bearing capacity.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF- 2017R1A2B3008466).
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 146 • Issue 8 • August 2020
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©2020 American Society of Civil Engineers.
History
Received: May 30, 2019
Accepted: Mar 6, 2020
Published online: May 20, 2020
Published in print: Aug 1, 2020
Discussion open until: Oct 20, 2020
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