Hybrid Approach for Rigid Piled-Raft Foundations Subjected to Coupled Loads in Layered Soils
Publication: International Journal of Geomechanics
Volume 17, Issue 5
Abstract
This paper proposes an efficient hybrid approach for analysis of the responses of piled-raft foundations subjected to coupled loads (combination of vertical loads, horizontal loads, and moments) in layered soils. The proposed method comprehensively accounts for pile–pile, pile–soil surface, soil surface–pile, and soil surface–soil surface interactions. Moreover, to capture the influence of embedment and active/passive effects of piles, a modified Vesic’s subgrade modulus for embedded piles and passive piles was adopted. To avoid a large number of time-consuming integration processes, the shear displacement method and elastic foundation beam method were employed to calculate the vertical and horizontal responses of a single pile, respectively, and the results were then extended for the pile group. The results calculated with the proposed method for piled-raft foundations in layered soils were found to have good agreement with those obtained from the more rigorous finite-element methods (FEMs) and elastic theory method in layered soils. It was found that the proposed procedure can accurately predict the responses of piled-raft foundations under complex loads in layered soils.
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Acknowledgments
The authors are grateful for the financial support provided by the National Natural Science Foundation of China through Grants 51208378 and 41572260 and the National Key Basic Research Program of China through Grant 2013CB036304.
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© 2016 American Society of Civil Engineers.
History
Received: Aug 7, 2015
Accepted: Sep 7, 2016
Published online: Oct 13, 2016
Discussion open until: Mar 13, 2017
Published in print: May 1, 2017
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