Field Behavior of Driven Prestressed High-Strength Concrete Piles in Sandy Soils
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 141, Issue 6
Abstract
Driven piles are used widely both offshore and onshore. However, accurate axial capacity and load-displacement prediction is difficult at sand-dominated sites, and offshore practice is moving towards cone penetration test (CPT) based design methods developed from instrumented pile research and database studies. However, onshore use of these methods remains limited; there is a paucity of high quality case histories to assess their potential benefits clearly, and application in layered profiles may be uncertain. This paper presents new tests on prestressed concrete (PHC) pipe piles driven in sands for a major new Yangtze River bridge project in China, assessing the performance of the ‘new CPT’ and conventional capacity approaches, considering the influence of weak sublayers on base resistance and noting the marked changes in shaft capacity that apply over time.
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Acknowledgments
The research described was funded by the Natural Science Foundation of China (Grant Nos. 51178421 and 51322809), the Chinese Ministry of Education Distinguished Overseas Professorship Programme, the National Key Basic Research Program of China (No. SQ2015CB070563), Zhejiang University K.P. Chao’s High Technology Development Foundation and the Fundamental Research Fund for Central Universities (No. 2014XZZX003-15). Their support is gratefully acknowledged. The third author also acknowledges his support from Natural Science Foundation of China (Grant Nos. 41172273 and 41372281). Last but not least, the paper is dedicated to the first author’s late father, Pushun Yang, for his endless love and continuous support over years.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 141 • Issue 6 • June 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Mar 28, 2014
Accepted: Jan 7, 2015
Published online: Feb 17, 2015
Published in print: Jun 1, 2015
Discussion open until: Jul 17, 2015
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