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Consolidation Characteristics of Soft Ground with Artesian Pressure
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 Title & Authors
Consolidation Characteristics of Soft Ground with Artesian Pressure
Yun, Daeho; Kim, Jaehong; Kim, Yuntae;
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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.
Consolidation;Artesian pressure;Vertical drain;Soft ground;
 Cited by
Baek, S. H. (2002), Characterisation and geotechnical properties of Pusan clays by insitu tests, Doctor's thesis, pp. 1-165 (in Korean).

Bergado, D. T., Manivannan, R. and Balasubramaniam, A. S. (1996), Proposed criteria for discharge capacity of prefabricated vertical drain, Journal of Geotextiles and Geomembrances, Vol. 14, pp. 481-505. crossref(new window)

Chai, J. C., Mjura, N., Sakajo, S. and Bergado, D. (1995), Behavior of vertical drain improved subsoil under embankment loading, Journal of Soil and Foundation, Japanese Geotechnical Society, Vol. 35, No. 4, pp. 49-61.

Hansbo, S. (1981), Consolidation of fine-grained soils by prefabricated drains, In Proceeding of 10th International Conference on Soil Mechanics and Foundation Engineering, Stockholm, Balkema, Botterdam, 3, pp. 677-682.

Heo, D. Y. (2003), A study on the depositional environment and geotechnical properties of clay deposited at the busan new port site, Doctor's thesis, pp. 1-129 (in Korean).

Holtz, R. D. (1987), Preloading with prefabricated vertical strip drains, Geotextiles and Geomembraens, Vol. 6, No. 1-3, pp. 109-131. crossref(new window)

Ismale, N. F. (1993), Laboratory and field leaching tests on coastal salt-bearing soils, Journal of Geotechnical Engineering, ASCE, Vol. 119, No. 3, pp. 453-470. crossref(new window)

Jamiolkowski, M., Lancellotta, R. and Wolski, W. (1983), Precompression and speending up consolidation, Procedure of 8th European Conference, Soil Mechanics and Foundation Engineering, Vol. 3, pp. 1201-1226.

Kim, H. T., Cho, J. H., Yoo, J. Y., Ro, J. K. and Kim, S. W. (2002), Self-weight consolidation settlement of soft-grounds on the artesian pressure after the penetration of vertical drain, KGS Fall '02 National Conference, pp. 597-604 (in Korean).

Kim, S. K., Kim, H. I., Hong, B. M. and Kim, H. T. (1999), Consolidation analysis of vertical drain considering artesian pressure, KGS Spring '99 National Conference, pp. 62-69 (in Korean).

Kim, Y. T. and Do, T. H. (2010), Effect of leaching on the compressibility of busan clay, Journal of Civil Engineering, Vol. 14, No. 3, pp. 291-297.

Korea water resources corporation (2015), Subsoil investigation report of busan eco-delta city-phase 1 & area 3, pp. 1-468 (in Korean).

Rixner, J. J., Kraemer, S. R. and Smith, A. D. (1986), Prefabricated vertical drains, Vol I, II and III: Summary of Research Report-Final Report, Federal Highway Administration, p. 433.