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http://dx.doi.org/10.7843/kgs.2016.32.8.15

Evaluation of Undrained Shear Strength for Clayey Silt with Low Plasticity from the West Coast  

Kim, Seok-Jo (Dept. of Civil and Transportation Eng., Ajou Univ.)
Lee, Sang-Duk (Dept. of Civil and Transportation Eng., Ajou Univ.)
Kim, Ju-Hyun (Research Institute Affiliated with Rgeo E&C)
Publication Information
Journal of the Korean Geotechnical Society / v.32, no.8, 2016 , pp. 15-25 More about this Journal
Abstract
In order to analyze undrained shear strength for clayey silt with low plasticity from Hwaseong site, a series of laboratory and in-situ tests were performed. The Unconfined Compressive (UC) test and Simple Consolidated-Undrained Triaxial (SCU) test were examined in order to assess their applicability to the measurement of the undrained strength of this soil. In the case of clayey silt with low plasticity, although the samples were properly taken by undisturbed sampling method, the residual effective stress and the unconfined compressive strength were reduced considerably. Therefore, an effective confining pressure that corresponds to the typical marine clay should be applied to the soil specimen before shearing in order to compensate for the loss of residual effective stress. By evaluating the shear strengths of clayey silt with low plasticity as 75% of $s_{u(scu)}$, the in-situ shear strength of this kind of soil can be duplicated.
Keywords
Clayey silt with low plasticity; Unconfined compressive test; Simple CU test; Undrained shear strength;
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