Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/210973
Title: Centrifuge and numerical modeling of axial load effects on piles in consolidating ground
Authors: Lam, SY
Ng, Charles WW
Leung, CF 
Chan, SH
Keywords: Science & Technology
Technology
Physical Sciences
Engineering, Geological
Geosciences, Multidisciplinary
Engineering
Geology
centrifuge
numerical
downdrag
dragload
pile groups
negative skin friction
SOIL
SHEAR
Issue Date: 1-Jan-2009
Publisher: CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
Citation: Lam, SY, Ng, Charles WW, Leung, CF, Chan, SH (2009-01-01). Centrifuge and numerical modeling of axial load effects on piles in consolidating ground. CANADIAN GEOTECHNICAL JOURNAL 46 (1) : 10-24. ScholarBank@NUS Repository.
Abstract: This paper reports the results of four centrifuge model tests that were undertaken to investigate behavior of floating piles subjected to negative skin friction (NSF) and to study effects of axial load on the load-transfer mechanism along single floating piles and shielded center piles inside a group of sacrificing piles. In addition, three-dimensional numerical analyses of the centrifuge model tests were carried out with elasto-plastic slip considered at the pile-soil interface. Prior to applying load, the measured neutral plane position of the single floating piles was located at approximately the three-quarter depth level of the embedded pile length. The neutral plane elevation shifts lower down the pile shaft as the distance of pile tip above the bearing stratum decreases. Under the application of axial load, the dragload generated by excessive soil settlement decreases and is eventually eliminated. The amount of axial load for complete NSF elimination does not seem to be significantly affected by the presence of sacrificing piles, but it does increase with end-bearing stiffness of the pile. Numerical simulation revealed that the hang-up effect is not altered by the application of axial load. © 2009 NRC Canada.
Source Title: CANADIAN GEOTECHNICAL JOURNAL
URI: https://scholarbank.nus.edu.sg/handle/10635/210973
ISSN: 00083674
12086010
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