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http://dx.doi.org/10.9720/kseg.2011.21.4.349

Permeability Characteristics of Soft Clay using the Piezocone Test and a Laboratory Test  

Gu, Nam-Sil (Research Support Office of Korea Land and Housing Corporation)
Kim, Young-Min (Research Support Office of Korea Land and Housing Corporation)
Park, Jae-Hwhan (Busan National University)
Jang, Ji-Guen (Gwang-Lim Engineering Construction)
Publication Information
The Journal of Engineering Geology / v.21, no.4, 2011 , pp. 349-359 More about this Journal
Abstract
The consolidation behavior of soft clay is controlled mainly by its compressibility and deformation characteristics. Soil permeability depends on various soil characteristics, including the soil type and anisotropy. The coefficient of permeability of soft clay is determined by using a laboratory test (the Oedometer test) or a piezocone test. The latter test is useful for estimating the permeability characteristics from $c_h$ and $k_h$ by performing an excess pore-pressure dissipation test. This study seeks to validate an existing theoretical formula in applying it to marine clay, and to assess the relation between $k_h/k_c$ and the mechanical properties of soft clay. Piezocone tests and laboratory tests were performed using sediment from the Yellow Sea and from the South Sea near Korea. We compared $k_h/k_v$ values obtained using the piezocone test and using laboratory consolidation tests. The obtained values are similar to the values obtained by Jamiolkowski et al. (M application); therefore, the latter values are recommended to be used as $k_h/k_v$.
Keywords
Coefficient of permeability; Piezocone dissipation test; $c_h$; $k_h$; $k_h/k_v$;
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