Influences of Initial Water Content and Roughness on Skin Friction of Piles Using FBG Technique
Publication: International Journal of Geomechanics
Volume 17, Issue 4
Abstract
A series of pullout tests were conducted on a model pile in a soil with different initial water contents and different pile surface roughnesses to study their influences on pile skin friction. To measure axial strains and skin friction of the pile, fiber Bragg grating (FBG) strain sensors were used. Data were collected during the pullout tests and are analyzed in this paper. Test results indicate that the skin friction and axial strain of the model piles decrease with the initial water content of the soil but increase with the degree of surface roughness of the piles. The axial strain induced in the upper segment of the tested pile is considerably greater than that in the bottom segment of the pile. In addition, the skin friction is distributed nonlinearly along the length of the model piles.
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Acknowledgments
The authors gratefully acknowledge the financial support of a research grant (Project 2014CB047001) from the Ministry of Science and Technology of the People’s Republic of China; support from PolyU Shenzhen Research Institute; financial support (Grants 4-BCAU and 5-ZJE9) from the Hong Kong Polytechnic University, China; and support from the National Natural Science Foundation of China (Grant 51408148).
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Published In
International Journal of Geomechanics
Volume 17 • Issue 4 • April 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Feb 2, 2016
Accepted: Jul 27, 2016
Published online: Sep 9, 2016
Discussion open until: Feb 9, 2017
Published in print: Apr 1, 2017
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