한국지반환경공학회 논문집 (Journal of the Korean GEO-environmental Society)

  • 제14권5호
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  • Pages.49-56
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  • 2013
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  • 1598-0820(pISSN)
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  • 2714-1233(eISSN)
한국지반환경공학회 (Korean Geo-Environmental Society)
권호 표지

동해 울릉분지 심해토의 지반공학적 특성(2) - 미세구조특성, 광물특성 및 강도특성에 관한 연구

Geotechnical Characteristics of the Ulleung Basin Sediments, East Sea (2) - Microstructure, Mineralogy, and Strength Parameters

  • 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)
  • 발행 : 2013.05.01
⟨ 이전 논문 다음 논문 ⟩

초록

천연자원을 개발하기 위한 심해저 탐사의 필요성이 증가하고 있다. 동해 울릉분지에서 수행된 가스 하이드레이트 심부 시추 사업(UBGH2)에서 획득된 시료로 지반공학적 기본특성 및 강도특성을 분석하였다. 아터버그 한계, 비표면적, 입도분포 등 기본 토질 실험을 실시하고 선행연구와 비교하였다. 광물학적 특성, 화학 조성, 미세구조 관찰을 위하여 XRD, SEM 그리고 EDS를 실시하였다. 또한 벤더 엘리먼트를 설치한 삼축압축셀을 이용하여 삼축압축실험을 수행하면서 강도정수와 전단파 거동을 분석하였다.

The necessity of exploration in deep sea increases to develop the natural resources. The deep marine sediments, which were recovered from the hydrate occurrence regions during the Ulleung Basin Gas Hydrate Expedition 2 (UBGH2), East Sea, Korea in 2010, are explored to obtain the geotechnical characteristics and strength parameters. The index properties of the specimens including the atterberg limits, specific surface, and particle size distribution are measured and compared with the previous studies. X-ray diffraction, scanning electron microscope, and X-ray energy dispersive spectroscopy are conducted to analyze the clay mineralogy, chemical composition, and microstructure of the sediments. Strength parameters and shear wave velocities are measured with the axial strain by using an instrumented triaxial device. The strength parameters estimated by empirical equations are compared with the experimental results.

키워드

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