Browse > Article

3-D Slope Stability Analysis on Influence of Groundwater Level Changes in Oksan Landslide Area  

Seo, Yong-Seok (Department of Earth & Environmental Sciences, Chungbuk National University)
Kim, Sung-Kwon (Department of Earth & Environmental Sciences, Chungbuk National University)
Lee, Kyoung-Mi (Department of Earth & Environmental Sciences, Chungbuk National University)
Publication Information
The Journal of Engineering Geology / v.18, no.2, 2008 , pp. 177-183 More about this Journal
Abstract
In the study, we carried out a 3-D analysis to assess the influence of groundwater level changes on the slope stability, conducting a series of back-numerical analysis to delineate the critical line of the shear strength of the failure surface of a landslide, and a laboratory test to determine the geo-mechanical properties of soil samples. The analysis result shows that the shear strength determined by the laboratory test was distributed below the critical line of shear strength estimated by back-analysis. Differences between driving and resisting force were also analyzed in groundwater conditions of dry and saturation. It appeared that the stress gets greater towards the slope center of the landslide, and the debris mass moves downwards. According to the analysis, the factor of safety becomes 1 with the rise of foundwater level up to -0.85 m from the slope surface, while the slope tends to stay stable during dry seasons.
Keywords
landslide; debris flow; 3D slope stability analysis; groundwater level; stress state;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 김원영, 채병곤, 김경수, 기원서, 조용찬, 최영섭, 이사로, 이봉주, 2000, 산사태 예측 및 방지기술연구, 한국자원연구소, KR-00-(T)-09, p.642
2 박덕근, 오정림, 김태훈, 박정훈, 2006, 우리나라 사면재해 피해현황과 대책, 한국지반공학회지, 22(6), pp.6-18
3 Ohta, H. and Hayashi, Y., 1998, A study of threedimensional analysis of slope stability (part 1), 日本地すべり學會硏究發表會, pp.441-444
4 Reneau, S.L., Dietrich, W.E., 1987, The importance of hollows in debris flow studies: examples from Marin County, California. In: Costa, J. E., Wieczorek, G. F. (Ed.), Debris flows Avalanches; Process, Recognition, and Mitigation, Geological Society of America, Reviews in Engineering Geology, pp.165-180
5 Dietrich, W.E., Dorn, R., 1984, Significance of thick deposits of colluvium on hillslopes: a case study involving the use of pollen analysis in the coastal mountains of Northern California, The Journal of Geology, 92, pp.147-158   DOI
6 Yamada, S., 1995, Relations between topographic conditions and debris movement deduced from distribution of regolith in a zero order basin near Sapporo, Hokkaido, Japan, Geomorphology, 16, pp.349-360
7 김경수, 김원영, 채병곤, 조용찬, 이춘오, 송영석, 2006, 자연사면에서 발생된 토석류산사태의 기하양상, KSEG Conference, pp.51-59
8 이하영, 윤혜수, 이준동, 1989, 병천도폭 지질보고서 (1:50,000), 한국동력자원연구소
9 Crozier, M.J., Vaughan, E.E., Tippett, J.M., 1990, Relative instability of colluvium-filled bedrock depressions, Earth Surface Processes and Landforms, 15, pp.329-339   DOI
10 이경미, 김현, 이재혁, 서용석, 김지수, 2007, 지구물리탐 사를 이용한 산사태지역의 지하수위에 따른 안정성 해석, 대한지질공학회지, 17(4), pp.545-554   과학기술학회마을
11 Dietrich, W.E., Dunne, T., 1978, Sediment budget for a small catchment in mountainous terrain, Geomorphology, Suppl., 29, pp.191-206
12 Dietrich, W.E., Wilson, C.J., Reneau, S.L., 1986, Hollows, colluvium, and landslides in soil-mantled landscapes, In: Abra-hams, A.D. (Ed.), Hillslope Processes, Allen and Unwin, London, pp.361-388
13 Yamada, S., 1999, The role of soil creep and slope failure in the landscape evolution of a head water basin: field measurements in a zero order basin of northern Japan, Geomophology, 28, pp.329-344   DOI   ScienceOn
14 Reneau, S.L., Dietrich, W.E., 1990, Depositional history of hollows on steep hillslopes, coastal Oregon and Washington, National Geographic Research, 16, pp.220-230
15 이경미, 김성권, 서용석, 이선복, 김동현, 김도식, 2007, 2차원 유한요소법과 3차원 한계평형법을 이용한 테일러스 사면안정성 해석, 대한지질공학회지, 17(3), pp.381-391   과학기술학회마을