A three-dimensional numerical comparison of bearing capacity and settlement of tapered and under-reamed piles
Article
Article Title | A three-dimensional numerical comparison of bearing capacity and settlement of tapered and under-reamed piles |
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ERA Journal ID | 40355 |
Article Category | Article |
Authors | Vali, Ramin (Author), Mehrinejad Khotbehsara, Elham (Author), Saberian, Mohammad (Author), Li, Jie (Author), Mehrinejad, Mojdeh (Author) and Jahandari, Soheil (Author) |
Journal Title | International Journal of Geotechnical Engineering |
Journal Citation | 13 (3), pp. 236-248 |
Number of Pages | 13 |
Year | 2019 |
Place of Publication | United States |
ISSN | 1938-6362 |
1939-7879 | |
Digital Object Identifier (DOI) | https://doi.org/10.1080/19386362.2017.1336586 |
Web Address (URL) | https://www.tandfonline.com/doi/full/10.1080/19386362.2017.1336586 |
Abstract | Tapered piles by top cross sections larger than the toe cross sections and under-reamed piles by having one or more bulbs, have the potential for substantial major sides over conventional straight-sided piles. Most of the studies on tapered and under-reamed piles have been conducted on the experimental side, while, theoretical studies, such as finite element method, have been mainly confined to conventional straight-sided piles. On the other hand, although several field, laboratory and experimental studies have been conducted to study the behaviour of tapered and under-reamed piles, few numerical studies have been carried out to simulate the behaviour of the piles. In addition, there is no research to compare and evaluate behaviour of these two piles due to different geotechnical and geometrical properties. Therefore, the aim of this study was to numerically investigate bearing capacity and settlement of tapered and underreamed piles by changing the soil type, cohesion, angle of internal friction, the length and diameter of piles, tapering degree and the number of bulbs using finite element method. Based on the FEM results, it was found that by increasing the values of geotechnical and geometrical properties, bearing capacity of the tapered pile was more than that of the under-reamed one (i.e. settlement of tapered pile was less than that of the under-reamed one). The reason for this trend could be attributed to increasing contact surface area, friction resistance and more adhesion between soil and the tapered pile. In addition, bulb number of under-reamed piles and tapering degree of tapered piles had significant effects on settlement and bearing capacity of the piles. |
Keywords | tapered pile; under-reamed pile; bearing capacity; settlement; finite element method; geotechnical properties; geometrical properties |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 400599. Civil engineering not elsewhere classified |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Mohajer Technical University of Isfahan, Iran |
Islamic Azad University, Iran | |
Royal Melbourne Institute of Technology (RMIT) | |
Centre for Future Materials | |
Graduate University of Advanced Technology, Iran | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4515/a-three-dimensional-numerical-comparison-of-bearing-capacity-and-settlement-of-tapered-and-under-reamed-piles
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