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http://dx.doi.org/10.7843/kgs.2013.29.1.161

Analysis of Diameter Effects on Skin Friction of Drilled Shafts in Sand  

Lee, Sung-June (Dept. of Civil Engineering, Cheongju Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.29, no.1, 2013 , pp. 161-170 More about this Journal
Abstract
In this paper, numerical pile segment analysis is conducted with an advanced soil elastoplastic model to investigate the diameter effects on skin friction behaviour of a drilled shaft in sand. Ultimate skin friction and 't-z' behavior from the pile segment analyses for drilled shafts show good agreement with those from design methods. Higher ultimate skin friction for the smaller diameter pile is related to the greater increase in the effective radial stress at the interface due to the localized dilation at and near the pile interface. Stiffer t-z curve for the smaller diameter pile is related to the early occurrence of three shear stages (early, dilation, constant volume shear stages). The diameter effects on ultimate skin friction of drilled shafts are more prominent for denser sand and lower confining pressure.
Keywords
Drilled shafts; Pile diameter; Skin friction; Pile segment analysis; Sand;
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Times Cited By KSCI : 2  (Citation Analysis)
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