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Case Study on the Failure Causes of Gneiss Slope Occurred Tension Crack  

Chun, Byungsik (한양대학교 공과대학 건설환경공학과)
Noh, Insoo (한인철강(주))
Kong, Jinyoung (한양대학교 대학원 건설환경공학과)
Kim, Juhyong (한국건설기술연구원 지반연구실)
Publication Information
Journal of the Korean GEO-environmental Society / v.13, no.11, 2012 , pp. 27-35 More about this Journal
Abstract
The discontinuity of rock is one of important elements that have impact on the dynamic movement of rock. A slope made of gneiss has complicated geological structure because of the gneiss forming process through metamorphism covering wide range and the anisotropic structure with foliation. In this study, before cutting slope, the rock of slope had been found as a good quality by the boring test. But during construction tension cracks had occurred in the section with 170m length during large-scale excavation work with depth more than 20m. Ground surface geological investigation, boring exploration, resistivity logging and borehole image processing had been done to find the causes of the tension crack. It was possible to estimate the scale of fault existing in large area through resistivity logging and geological investigation. Large scale slickenside and fault clay had been found as the result of comprehensive analysis.
Keywords
Discontinuity; Gneiss; Foliation; Tension crack;
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  • Reference
1 Hoek, E. and Diederichs, M.(1989), Dips-a Program for Plotting, Analysis and Presentation of Structural Geology Data Using Spherical Projection Techniques, Rock Engineering Group, University of Toronto, Toronto, CD-ROM.
2 Kim, M. I., Kim, J. T., Kim, J. H., Ro, B. D., Jeong, G. C.(2008), Case Study of Assessment of Slope Stability and Geophysical Survey in Weathered Gneiss, The Journal of Engineering Geology, Vol. 18, No. 3, pp. 287-295.
3 Kim, W. Y., Chae, B. K., Kim, K. S.(2003), Study on Landslide Hazard Prediction, Ministry of Science and Technology, Korea Institutue of Geoscience and Mineral Resouces, KR-03-(T)-03, p. 339.
4 Lee, I. M.(2005), The Principles of Rock Mechanics, SaeRon Publishing Co, pp. 36-37.
5 Lee, S. G., Yang, H. S.(2003), A Study on Slope Stability Analysis of Fault Zone Area, Annual Conference of Korean Society of Civil Engineers, pp. 3806-3811.
6 NEMA(2008), A Study on the Investigration and Design Development & Development of Total Management System of cut-slopes, National Emergency Management Agency, pp. 284-538.
7 Song, Y. S., Chae, B. G.(2008), Development to Prediction Technique of Slope Hazards in Gneiss Area using Decision Tree Model, Journal of Engineering Geology, Vol. 18, No. 1, pp. 45-54.
8 Chung, H. S.(2005), Rock Mechanics, SaeRon Publishing Co, pp. 52-53.
9 Hoek, E. and Brown, E. T.(1980), Empirical Strength Criterion for Rock Masses, J. Geotech. Div., Vol. 106, pp. 1013-1035.