한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)
- 한국지반공학회 2006년도 춘계 학술발표회 논문집
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- Pages.1-11
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- 2006
셰일 및 운모편암의 사면안전성에 미치는 영향
Effect of shale or mica schist on slope stability
- Lee, Byung-Joo (Dept. Geology and Geoinformation, KIGAM) ;
- Shin, Hee-Soon (Dept. Geotechnical Engineering, KIGAM) ;
- SunWoo, Choon (Dept. Geotechnical Engineering, KIGAM)
- 발행 : 2006.03.24
초록
To be design the slope, the area distributed the shale or mica schist which was metamorphosed by shale must carefully consider the stability. The shale has the detrital materials of which the grain size are 1/256mm and fissility. As the reason the slope of shale is always unstable by bedding slip and fissility but also the joint and fault. Mica schist is also another unstable rock for slope by schistosity, cleavage, axial plane of a fold etc. In general shale and mica schist contain the swelling clay minerals such as smectite, vermiculite and montmorillonite. These minerals make the slope unstable. At OO tunnel construction area for the rail way of the Kyungbu high speed train, the slope of mica schist is very unstable by the distribution phenomena of the discontinuous plane such as joints which are 1-5cm spacing and thrust and strike-slip fault. By the drilling core of this area, most RQD have 0-20%.