Hyperbolic Method for Prediction of Prefabricated Vertical Drains Performance
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 135, Issue 10
Abstract
For predicting the settlement rate of a ground area that incorporates prefabricated vertical drains, the hyperbolic method is herein developed based on Barron’s solution and validated by using three documented case studies. This method is suitable within the degrees of consolidation of 60–90%. Results indicate that the estimated coefficients of radial consolidation are slightly larger. In two case studies, the estimated values are closer to the coefficients of vertical consolidation obtained from the standard oedometer tests but differ from those values derived from the cone penetration test (CPT) tests. In another case study, where not laboratory results are available, the estimated values fall within a lower bound determined by CPT results. The reason of these differences is due to various factors such as smear and well resistance, the vertical drain type, and its finite drainage capacity. It also appears that, in contrast to the solution obtained by Barron, the settlement versus time curves from the proposed method concur with the monitored curves. Finally, the applicability of the proposed method is discussed based on the case studies.
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Acknowledgments
This work was supported by the Korea Science and Engineering Foundation (KOSEF) NRL Program grant funded by the Korea government (MEST) (Grant No. UNSPECIFIEDR0A-2008–000-20076–0), and by Dong-A University, Busan Korea.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 135 • Issue 10 • October 2009
Pages: 1519 - 1528
Copyright
© 2009 ASCE.
History
Received: Apr 14, 2008
Accepted: Jan 29, 2009
Published online: Apr 29, 2009
Published in print: Oct 2009
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