Case Studies of Reinforced Piled High-Speed Railway Embankment over Soft Soils
Publication: International Journal of Geomechanics
Volume 16, Issue 2
Abstract
Soil arching in the reinforced piled embankment is investigated in this paper on the basis of two case studies of high-speed railways constructed in the eastern coastal region of China. The majority of the overburden load was found to have been transferred from the soil to the pile because of soil arching in the piled embankment. In addition, the critical height was approximately 2.6–3.8 times the net pile spacing. The adapted Terzaghi method, the BS8006 method, the Hewlett and Randolph method, EBGEO, and a simplified analytical method used to analyze the reinforced piled embankment were discussed and verified by the two cases. It was found that the adapted Terzaghi method was consistent with the measurement for the stress reduction ratio, with an error of 2.0–38.0%. The simplified analytical method predicted the maximum geogrid strain with the error of 6.7–33.2%, and assessed the maximum settlement at the subsoil surface with an error of 4.4–51.0%.
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Acknowledgments
The financial support of the following is acknowledged: the National Natural Science Foundation of China (Grant Nos. 51478166 and 51108155), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, the State Education Ministry, the National Natural Science Fund’s High Iron Joint Fund projects (Grant No. U1134207), and the Fundamental Research Funds for the Central Universities (No. 2014B04914).
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Published In
International Journal of Geomechanics
Volume 16 • Issue 2 • April 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Apr 14, 2014
Accepted: Mar 12, 2015
Published online: Jul 8, 2015
Discussion open until: Dec 8, 2015
Published in print: Apr 1, 2016
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