General Analytical Model for Consolidation of Stone Column–Reinforced Ground and Combined Composite Ground
Publication: International Journal of Geomechanics
Volume 17, Issue 6
Abstract
First, this paper develops a new analytical model for the consolidation of stone column–reinforced ground by introducing multiple stone columns into the unit cell for analysis. Governing equations and analytical solutions are obtained for a time-varying surcharge loading, which includes four special loading schemes. The analytical model is then discussed and compared with a conventional analytical model with a single stone column in the unit cell. The results show that the conventional analytical model is a special case of the present model because they predict almost the same average degree of consolidation. This verifies the correctness of the proposed analytical model. Compared with the conventional analytical model, an apparent advantage of this analytical model is that multiple stone columns are introduced into the new unit cell, which makes it possible to extend it to solve the consolidation of a combined composite ground stabilized by impervious piles along with vertical drains with some modifications on the boundary conditions. In this context, analytical model and corresponding analytical solutions are further obtained for the consolidation of the combined composite ground based on the previously mentioned model. The new model is then applied to a field case study at the Huai-Yan Highway in Jiangsu Province, China, in which the embankment was stabilized with impervious piles in combination with prefabricated vertical drains. Good agreement can be observed between the predicted and measured settlement. Finally, a parametrical analysis is performed to investigate the consolidation behavior of the combined composite ground.
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Acknowledgments
This study was supported by the Fundamental Research Funds for the Central Universities of China (Grant 2015XKMS015), and their support is gratefully acknowledged.
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Published In
International Journal of Geomechanics
Volume 17 • Issue 6 • June 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Feb 26, 2016
Accepted: Sep 14, 2016
Published online: Nov 1, 2016
Discussion open until: Apr 1, 2017
Published in print: Jun 1, 2017
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