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Smart Structures and Systems Volume 7, Number 4, April 2011 , pages 275-287 DOI: https://doi.org/10.12989/sss.2011.7.4.275 |
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Evaluation of preconsolidation stress by shear wave velocity |
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Hyung-Koo Yoon, Changho Lee, Hyun-Ki Kim and Jong-Sub Lee
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| Abstract | ||
| The behaviors of saturated soils such as compressibility and permeability are distinguished by preconsolidation stress. Preconsolidation stress becomes an important design parameter in geotechnical structures. The goal of this study is to introduce a new method for the evaluation of preconsolidation stress based on the shear wave velocity at small strain, using Busan, Incheon, and Gwangyang clays in Korea. Standard consolidation tests are conducted by using an oedometer cell equipped with bender elements. The preconsolidation stresses estimated by shear wave velocity are compared with those evaluated by the Casagrande, constrained modulus, work, and logarithmic methods. The preconsolidation stresses estimated by the shear wave velocity produce very similar values to those evaluated by the Onitsuka method (one of the logarithmic methods), which yields an almost real preconsolidation stress. This study shows that the shear wave velocity method provides a reliable method for evaluating preconsolidation stress and can be used as a complementary method. | ||
| Key Words | ||
| compressibility; consolidation; fabric change; preconsolidation stress; shear wave velocity; void ratio. | ||
| Address | ||
| Hyung-Koo Yoon, Changho Lee and Jong-Sub Lee : School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-701, Korea Hyun-Ki Kim : School of Civil and Environmental Engineering, Kookmin University, Seoul 136-702, Korea | ||