Analytical Study on Progressive Pullout Behavior of a Soil Nail
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 138, Issue 4
Abstract
During the past few decades, soil nailing has been widely used for stabilizing slopes and excavations. The nail-soil interface shear resistance in the passive zone of a slope or excavation is a critical parameter in design. In this paper, an analytical study is proposed to investigate the progressive pullout response of a soil nail. Pullout process is divided into three typical phases: (1) the initial pure elastic phase during which the nail-soil interface follows a linear elastic stress-displacement relationship; (2) the elastic-plastic phase during which a transition point presents dividing the elastic and plastic zones; and (3) the final pure plastic phase. A comparison study between calculations and laboratory test data are presented to examine the effectiveness of the method. In addition, a comprehensive parametric study is performed to assess the effects of several key factors on the pullout resistance of a soil nail. These factors include the length and diameter, length of plastic zone, and the elastic modulus of a soil nail. Main research findings are presented and discussed to gain a better understanding of the progressive interaction between soil and soil nail.
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Acknowledgments
Financial supports by a grant (PolyU 5320/07E) from the Research Grants Committee (RGC) of the Hong Kong Special Administrative Region Government of China and from The Hong Kong Polytechnic University are acknowledged. The financial support from the research committee of the University of Macau under research grant MYRG189(Y1-L3)-FST11-ZWH is also gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 138 • Issue 4 • April 2012
Pages: 500 - 507
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Jul 28, 2010
Accepted: Aug 2, 2011
Published online: Aug 5, 2011
Published in print: Apr 1, 2012
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