Lateral Vibration of Pile Groups Partially Embedded in Layered Saturated Soils
Publication: International Journal of Geomechanics
Volume 15, Issue 4
Abstract
A simplified solution procedure is proposed for estimating the dynamic response of a pile group partially embedded in a layered saturated soil and subjected to horizontal harmonic loading. In the proposed procedure, the transfer matrix method is first applied to solve the vibration equation of a single pile, from which the stiffness of the single pile is obtained. The existing lateral displacement of the saturated half-space is introduced to build the attenuation function, and the balance equation of passive pile is built accordingly. The simple Winkler model is used to derive the dynamic pile-soil-pile interaction factor. Based on the dynamic interaction factor, the horizontal impedance of the pile group is obtained by using the superposition principle. The calculated dynamic interaction factor and impedance of the pile group are in agreement with earlier results for an idealized case, verifying the correctness of the proposed method. The main parameters, such as the embedment ratio, pile separation distance, modulus of the first soil layer, and permeability, are considered in the numerical study, which may provide geotechnical and earthquake engineers with valuable reference for pile foundation design.
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Acknowledgments
The project was supported by the Fundamental Research Funds for the Central Universities of Central South University (Grant No. 2013zzts236), the key program of China Communication Construction Company (Grant No. 2008-2jkJ-02-E), the key program of Hunan Province (Grant No. 04sk2008), and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20120162110023).
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Published In
International Journal of Geomechanics
Volume 15 • Issue 4 • August 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Apr 26, 2013
Accepted: Apr 9, 2014
Published online: May 12, 2014
Published in print: Aug 1, 2015
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