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http://dx.doi.org/10.14481/jkges.2016.17.2.31

Consolidation Characteristics of Soft Ground with Artesian Pressure  

Yun, Daeho (Department of Ocean Engineering, Pukyong National University)
Kim, Jaehong (Infrastructure Research Center, Korea Water Resources Corporation)
Kim, Yuntae (Department of Ocean Engineering, Pukyong National University)
Publication Information
Journal of the Korean GEO-environmental Society / v.17, no.2, 2016 , pp. 31-39 More about this Journal
Abstract
Vertical drain has usually been used to accelerate the consolidation of soft clay deposits with high moisture content. Busan thick clay deposits are subjected to artesian pressure from an aquifer in sand and gravel layers. However, effect of artesian pressure existing in drainage-installed soft ground on consolidation behaviors is not well known. This paper investigates the consolidation behavior of drainage-installed soft ground at the Nakdong river estuary with artesian pressure and without artesian pressure. A series of one-dimensional large size column test was carried out to find out the consolidation characteristics of clay. Test results indicated that total settlement of clay with artesian pressure was higher than that without artesian pressure because effective stress decreased due to upward flow. Dissipation rate of excess pore water pressure delayed and excess pore water pressure did not fully dissipate in clay layer with artesian pressure. Undrained shear strength of clay ground with artesian pressure was lower than that without artesian pressure.
Keywords
Consolidation; Artesian pressure; Vertical drain; Soft ground;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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