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http://dx.doi.org/10.7843/kgs.2010.26.11.47

Hydraulic Characteristics of Busan Clay in the Floodplain of the Nakdong River Delta  

Chung, Seong-Gyo (Dept of Civil Engrg., Dong-A Univ.)
Lee, Nam-Ki (Development Project Team, Busan Metropolitan Corporation)
Lee, Jeong-Man (Dept. of Civil Engrg., Dong-A Univ.)
Min, Se-Chan (Dept. of Civil Engrg., Dong-A Univ.)
Hong, Yang-Pyo (Dept. of Civil Engrg., Dong-A Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.26, no.11, 2010 , pp. 47-61 More about this Journal
Abstract
To predict the settlement rate of a ground area that incorporates vertical drains, it is desirable to conduct various kinds of advanced field and laboratory tests for hydraulic properties. However, it is urgently needed to appropriately evaluate the hydraulic properties using the results of conventional soil tests which are extensively used for local practice. To achieve this purpose, a number of CPT dissipation test, laboratory permeability and consolidation tests were performed at five sites in the floodplain of the Nakdong River delta, and the test data were comprehensively analyzed. As a result, it is found that the coefficients of horizontal consolidation ($C_{h,NC}$) and permeability ($k_{h,OC}$) of the clay agreed well with those of the CPT-based methods proposed by Baligh and Levadoux (1986). The values of $C_{h,NC}$ and $k_{h,OC}$ were in the range of $0.4{\sim}3.0\;cm^2/sec$ and $0.40{\sim}2.50\;cm^2/sec$, each of which slightly increases or decreases with depth, respectively. It was also inferred that these trends seem to reflect the depositional environments of the clay.
Keywords
Clay; Consolidation; Dissipation test; Laboratory test; Permeability;
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Times Cited By KSCI : 5  (Citation Analysis)
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