Simplified Analytical Method for Calculating the Maximum Shear Stress of Nail-Soil Interface
Publication: International Journal of Geomechanics
Volume 12, Issue 3
Abstract
This paper describes a simplified analytical method that considers postinstallation normal stress, normal stress due to soil dilation, and grouting pressure when calculating the maximum shear stress of the nail-soil interface. Systematic test results from two previous publications were used to verify the accuracy of the proposed method. The Hong Kong design method was also used to determine the maximum shear stress of the nail-soil interface. These analyses confirmed that the experimental data were more accurately predicted by the proposed analytical method. An extensive parametric study was conducted to examine the effects of several key parameters on the maximum shear stress. It was observed that when there was no grouting pressure, maximum shear stress increased with increasing overburden pressure, failure surface distance, dilation angle, or decreased drill hole radius. Analysis using the proposed model also demonstrates that grouting and overburden pressures share an interactional effect. The larger the grouting pressure, the greater the influence of the overburden pressure; and, consequently, the larger the maximum shear stress at the nail-soil interface.
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Acknowledgments
Financial support in the form of grants from the Research Grants Committee (RGC) of the Hong Kong Special Administrative Region Government of China and The Hong Kong Polytechnic University (PolyU 5320/07E), and a research grant from the University of Macau (SRF014/09-10S/ZWH/FST) are gratefully acknowledged.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 12 • Issue 3 • June 2012
Pages: 309 - 317
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Dec 17, 2010
Accepted: Jun 30, 2011
Published online: Jul 2, 2011
Published in print: Jun 1, 2012
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