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http://dx.doi.org/10.7843/kgs.2010.26.4.27

Evaluation of State Parameter of Sands Using Dilatometer Test  

Choi, Sung-Kun (Nawoogeo Consultant. Co., Ltd.)
Lee, Moon-Joo (School of Civil, Environmental and Architectural Engrg., Korea Univ.)
Hong, Sung-Jin (School of Civil, Environmental and Architectural Engrg., Korea Univ.)
Lee, Woo-Jin (School of Civil, Environmental and Architectural Engrg., Korea Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.26, no.4, 2010 , pp. 27-36 More about this Journal
Abstract
In this study, a series of flat dilatometer tests are performed for Busan sand reconstituted in a large calibration chamber to evaluate the state parameter ($\Psi$). Experimental result shows that the horizontal amplification factor ($K_D/K_0$) is linearly related with state parameter in semi-logarithmic space, but the $K_D/K_0$ of OC specimen is smaller than that of NC specimen because of the horizontal residual stress by stress history of OC specimen. The relation between the normalized dilatometer modulus ($E_D/\sigma_m) and the state parameter is also linearly expressed in semi-logarithmic space, and the effect of stress history is relatively insignificant in this relation. However, the variation in $E_D/\sigma_m relation of NC state is slightly higher than that of OC state due to the effect of the stress level, and the correlation curve is descending with increase of confining stress. The comparison of test result with previous results of Ticino and Toyoura sands shows that the $E_D/\sigma_m relation of Toyoura sand is located on upper side than that of Busan and Tieino sands due to the effect of the higher compressibility, whereas the $K_D/K_0-\Psi$ relation of each sand is irregularly distributed.
Keywords
Busan sand; Dilatometer modulus; Dilatometer tests; Horizontal stress index; State parameter;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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