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Analysis of Slope Stability at the End of OO tunnel being Distributed by Mica Schist  

Lee, Byung-Joo (Geologic Environment Div., Korea Institute of Geoscience and Mineral Resources)
SunWoo, Choon (Geologic Environment Div., Korea Institute of Geoscience and Mineral Resources)
Publication Information
The Journal of Engineering Geology / v.19, no.3, 2009 , pp. 287-294 More about this Journal
Abstract
To be design the slope, the area distributed the mica schist which was metamorphosed by shale or mudstone must carefully consider the stability. Mica schist is another unstable rock for slope by schistosity, cleavage, axial plane of a fold etc. In general mica schist contains 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 1-5 cm spacing and thrust and strike-slip fault. By the drilling core of this area, most RQD have 0-20%.
Keywords
mica schist; fissility; swelling clay minerals; slope stability; discontinuous plane;
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