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Geotechnical Characteristics of the Ulleung Basin Sediment, East Sea (1) - Cosolidation and Shear Waves Velocity  

Kim, Youngmoon (Scool of Civil, Environmental and Architectural Engineering, Korea University)
Lee, Jongsub (Scool of Civil, Environmental and Architectural Engineering, Korea University)
Lee, Jooyong (Korea Institute of Geoscience and Mineral Resources)
Lee, Changho (Scool of Civil, Environmental and Architectural Engineering, Korea University)
Publication Information
Journal of the Korean GEO-environmental Society / v.14, no.5, 2013 , pp. 33-39 More about this Journal
Abstract
A drilling exploration in deep sea is being processed to develop new energy resource in the world. In 2007, the presence of the gas hydrate had been confirmed during the UBGH1 (Ulleung Basin Gas Hydrate Expedition 1) in the Ulleung Basin. Geotechnical properties of the deep marine sediment are important factors for assessing the safety of gas production facility and productivity from the hydrate bearing sediment. In this study, comprehensive laboratory tests are conducted to investigate the geotechnical engineering characteristics of the deep marine sediments recovered from the hydrate occurrence regions during the UBGH2 (Ulleung Basin Gas Hydrate Expedition 2) in the Ulleung Basin, East Sea, Korea. The index properties of the specimens including the specific gravity, atterberg limits, specific surface, and particle size distribution are measured, and these are compared to the results reported by previous studies. A zero-lateral strain cell, which houses bender elements, is used to determine stress-dependant characteristics and shear wave velocities with the vertical effective stresses. Furthermore, the hydraulic conductivity is calculated based on the consolidation test results.
Keywords
Atterberg limits; Compression index; Deep marine sediment; Specific surface; Particle size distribution; Permeability;
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