The Journal of Engineering Geology (지질공학)

The Korean Society of Engineering Geology (대한지질공학회)
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Infinite Slope Stability Analysis based on Rainfall Pattern in Ulleung-do

울릉도지역 강우패턴을 고려한 무한사면 안정성 해석

  • Lee, Chung-Ki (Department of Earth and Environmental Sciences, Chungbuk National University) ;
  • Moon, Seong-Woo (Department of Earth and Environmental Sciences, Chungbuk National University) ;
  • Yun, Hyun-Seok (Department of Earth and Environmental Sciences, Chungbuk National University) ;
  • Seo, Yong-Seok (Department of Earth and Environmental Sciences, Chungbuk National University)
  • 이충기 (충북대학교 지구환경과학과) ;
  • 문성우 (충북대학교 지구환경과학과) ;
  • 윤현석 (충북대학교 지구환경과학과) ;
  • 서용석 (충북대학교 지구환경과학과)
  • Received : 2018.01.08
  • Accepted : 20180229
  • Published : 2018.03.31
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Abstract

The purpose of slope stability analysis is to predict the location and occurrence time considering the rainfall, topographic and soil characteristics, etc. In this study, infinite slope stability analysis considering the time distribution characteristics of the daily maximum rainfall was conducted using a model that combines a digital terrain model and a groundwater flow model. As the results of slope stability analysis, 69.1~70.0% of Fs < 1 cells are in the range of slope angle $20{\sim}50^{\circ}$ and Fs < 1 starts to appear in 2 hours for $Q_1$ model, 5 hours for $Q_2$, 7 hours for $Q_3$ and 6 hours for $Q_4$. Furthermore, the maximum number of Fs < 1 cells appear in 6 hours for $Q_1$ model, 12 hours for $Q_2$, 16 hours for $Q_3$ and 20 hours for $Q_4$, and the area of Fs < 1 is 14.3% for $Q_1$ model, 15.0% for $Q_2$, 15.6% for $Q_3$, and 16.3% for $Q_4$.

사면 안정해석의 목적은 강우, 지형 및 토질 특성 등을 고려하여 발생 위치와 발생 시간을 예측하는 것이다. 본 연구에서는 수치지형 모델, 지하수위 변화를 반영하는 집수모델, 무한사면 안정해석 모델을 결합한 모델을 이용하여 울릉도 산지를 대상으로 Huff 4분위법의 강우패턴에 따라 시간대별로 변화하는 지하수위를 고려한 사면 안정해석을 실시하고, 그 결과를 정량적으로 분석하였다. 해석 결과 사면의 경사가 $20{\sim}50^{\circ}$ 범위일 때 안전율 1.0 이하의 셀이 전체의 69.1~70.0%로 가장 넓게 분포하였으며, 강우 지속시간이 1분위($Q_1$)의 경우 2시간, 2분위($Q_2$) 5시간, 3분위($Q_3$) 7시간, 4분위($Q_4$) 6시간부터 안전율 1.0이하의 셀이 나타나기 시작한다. 또한, 안전율 1.0 이하의 셀이 최대로 나타나는 강우 지속시간은 1분위의 경우 6시간, 2분위 12시간, 3분위 16시간, 4분위 20시간으로 나타났으며, 분위별 안전율 1.0 이하 면적은 각각 14.3%, 15.0%, 15.6%, 16.3%로 나타났다.

Keywords

References

  1. Akitani, K., 1978, Stability of natural slopes during heavy rainfall (vegetation as factor to cause slope failure), Symposium on Stability of natural slopes during heavy rainfall, 33-38 (in Japanese).
  2. Aleotti, P., Chowdhury, R., 1999, Landslide hazard assessment: summary review and new perspectives, Bulletin of Engineering Geology and the Environment, 58, 21-44. https://doi.org/10.1007/s100640050066
  3. Anderson, S.A., Sitar, N., 1995, Analysis of rainfall-induced debris flow, Journal of Geotechnical Engineering, ASEC, 121(7), 544-552. https://doi.org/10.1061/(ASCE)0733-9410(1995)121:7(544)
  4. Associated Ministries of South Korean Government, 2013, Abnormal climate report, Korean government, 11-1360000-000705-11.
  5. ASTM Standard D 422-63, 2007, Standard test method for particle size analysis of soil, ASTM International, West Conshohocken, PA, 2007, www.astm.org.
  6. ASTM Standard D 854-10, 2010, Standard test methods for specific gravity of soil solids by water pycnometer, ASTM International, West Conshohocken, PA, 2010, www.astm.org.
  7. ASTM Standard D 2216-10, 2010, Standard test method for laboratory determination of water (moisture) content of soil and rock by mass, ASTM International, West Conshohocken, PA, 2010, www.astm.org.
  8. ASTM Standard D 3080-98, 1998, Standard test method for direct shear test of soils under consolidated drained conditions, ASTM International, West Conshohocken, PA, 1998, www.astm.org.
  9. Bae, H.J., 2001, The Analysis of Landslides in Bulguksa Granite Site, The Geographical Journal of Korea, 21, 111-121 (in Korean with English abstract).
  10. Brand, E.W., 1981, Some thoughts on rainfall-induced slope failures, In Proceedings of the 10th International Conference on Soil Mechanics and Foundation Engineering, Stockholm, 3, 373-396.
  11. Bromhead, E.N., 1992, The stability of slopes, Blckie Academic & Professional, 424p.
  12. Chacon, J., Irigaray, C., Fernandez, T., El Hamdouni, R., 2006, Engineering geology maps: landslides and geographical information systems, Bulletin of Engineering Geology and the Environment, 65, 341-411. https://doi.org/10.1007/s10064-006-0064-z
  13. Chae, B.G., Lee, H.S., Song, Y.S., Cho, Y.C., Seo, Y.S., 2007, Characterization on relationships among rainfall intensity, slope angle and pore water pressure by a flume test: in case of gneissic weathered soil, The Journal of Engineering Geology, 17(1), 57-64 (in Korean with English abstract).
  14. Chae, B.G., Park, K.B., Park, H.J., Choi, J.H., Kim, M.I., 2012, Analysis of slope stability considering the saturation depth ratio by rainfall infiltration in unsaturated soil, The Journal of Engineering Geology, 22(3), 343-351 (in Korean with English abstract). https://doi.org/10.9720/kseg.2012.3.343
  15. Chae, J.G., Jung, M.S., Nobuyuki, T., Takashi, O., 2010, A risk evaluation method of slope failure due to rainfall using a digital terrain model, Journal of civil engineering, KSCE, 30(6), pp. 219-229 (in Korean with English abstract).
  16. Chen, C.W., Saito, H., Oguchi, T., 2015, Rainfall intensity-duration conditions for mass movements in Taiwan, Progress in Earth and Planetary Science, 2(14), 1-13. https://doi.org/10.1186/s40645-015-0032-y
  17. Fell, R., Corominas, J., Bonnard, C., Cascini, L., Leroi, E., Savage, W. Z., 2008, Guidelines for landslide susceptibility, hazard and risk zoning for land use planning, Engineering Geology, 102, 85-98. https://doi.org/10.1016/j.enggeo.2008.03.022
  18. Frattini, P., Crosta, G.B., Fusi, N., Negro, P.D., 2004, Shallow landslides in pyroclastic soils: a distributed modeling approach for hazard assessment, Engineering Geology, 73, 277-295. https://doi.org/10.1016/j.enggeo.2004.01.009
  19. Griffiths, D.V., Huang, J., Fenton, G.A., 2011, Probabilistic infinite slope analysis, Computers and Geotechnics, 38, 577-584. https://doi.org/10.1016/j.compgeo.2011.03.006
  20. Hazan, A., 1892, Some physical properties of sands and gravels: Mass. State Board of Health, Ann. Rept. 539-556.
  21. Hong, W.P., Kim, Y.W., Kim, S.K., Han, J.G., Kim, M., 1990, Prediction of rainfall-triggered landslides in Korea, Korean Geotechnical Society, 6(2), 159-167 (in Korean with English abstract).
  22. Huff, F.A., 1967, Time distribution of rainfall in heavy storm, Water Resources Research, 3(4), 1007-1019. https://doi.org/10.1029/WR003i004p01007
  23. Jin, M.S., Shin. H.J. Kwon, S.K., 2005, Igneous Rocks and Igneous Activities in the Korean Peninsula, Korea Institute of Geoscience and Mineral Resources, 310 (in Korean with English abstract).
  24. Kawatani, T., 1981, Topographic change and runoff, Transactions, Japanese Geomorphological Union, 2(1), 127-139.
  25. Keifer, C.J., Chu, H.H., 1957, Synthetic storm pattern for drainage design, Journal of Hydraulics Division, ASCE, 83(4), 1-25.
  26. KIGAM, 1993. A Study on slope stability evaluation and control in urban areas (part I), KR-92(T)-2. 1-89.
  27. Kim, J.U., 2016, Slope stability estimation concerning risk area considering rainfall infiltration characteristics in Ulsan, MSc Thesis, Ulsan National University, 1-80 (in Korean with English abstract).
  28. Kim, K. B. and Lee, G. D., 2008, A study on volcanic stratigraphy and fault of Ulleung-do, Korea, The journal of Engineering Geology, 18(3), 321-330 (in Korean with English abstract).
  29. Kim, K.S., Song, Y.S., Cho, Y.C., Kim, W.Y., Jeong, G.C., 2006, Characteristics of rainfall and landslides according to the geological condition, The Journal of Engineering Geology, 16(2), 201-214 (in Korean with English abstract).
  30. Kim, Y.K., Kim, S.U., 1977, Applied geology of Ulreung-Island, Provincial government of Gyeongsangbuk-Do, 59. (In Korean)
  31. Lee, J.S., Kim, Y.T., 2013, Infiltration and stability analysis of weathered granite slope considering rainfall patterns, Journal of KOSHAM, 13(5), 83-91 (in Korean with English abstract).
  32. Lu, N., Likos, W.J., ,2006. Suction stress characteristic curve for unsaturated soil, Journal of Geotechnical and Geoenvironmental Engineering, 132(2), 131-142. https://doi.org/10.1061/(ASCE)1090-0241(2006)132:2(131)
  33. Mein, R.G., Larson, C.L., 1973, Modeling infiltration during a steady rain, Water Resource Research, 9(2), 384-394. https://doi.org/10.1029/WR009i002p00384
  34. MOLIT, 2000, Development research report of water resources management technology, Volume 1, The creation of probability rainfall in Korean, Korea Institute of Civil Engineering and Building Technology, 60p (in Korean).
  35. Montgomery, D.R., Dietrich, W.E., Torres, R., Anderson, S.P., Heffiner, J.T., Loague, K., 1997, Hydrologic response of a steep, unchanneled valley to natural and applied rainfall, Water Resources Research, 33(1), 91-109. https://doi.org/10.1029/96WR02985
  36. National Disaster Management Institute, 2008, A study on the steep slope information compilation and development of an analysis system, 1st report: the app.
  37. Okimura, T., Ichikawa, R., 1985, A prediction method for surface failures by movements of infiltrated water in a surface soil layer, Natural Disaster Science, 7(1), 41-51.
  38. Onur, E.M., 2014, Predicting the permeability of sandy soils from grain size distributions, MSc Thesis, Kent State University in partial, 9p.
  39. Park, D.C., 2005, A study on the characteristics of landslide by rock types, MSc Thesis, University of Seoul, 10-23 (in Korean with English abstract).
  40. Polemoio, M., Petrucci, O., 2000, Rainfall as a landslide triggering factor: An, overview of recent international research, Landslides in Research, Theroy and Practice, Thomas Telfod, London, 3, 1219-1226.
  41. Rahardjo, H., Li, X. W., Toll, D.G., Leong, E.C., 2001, The effect of antecedent rainfall on slope stability, Geotechnical and Geological Engineering, 19, 371-399. https://doi.org/10.1023/A:1013129725263
  42. Santoso, A.M., Phoon, K.K., Quek, S.T., 2011, Effects of soil spatial variability on rainfall-induced landslides, Computers and Structures, 89, 893-900. https://doi.org/10.1016/j.compstruc.2011.02.016
  43. Simons, D.B., Li, R.M., Ward, T.J., 1978, Mapping of potential landslide areas in terms of slope stability, USDA Forest Service Rocky Mountain Forest and Rang Experiment Station, 75p.
  44. Song, Y.S., Hong, W.P., 2011, Analysis of slope stability with consideration of the wetting front and groundwater level during rainfall, The Journal of Engineering Geology, 21, 25-34 (in Korean with English abstract). https://doi.org/10.9720/kseg.2011.21.1.025
  45. Terlien, M.T.J., 1996, Modeling spatial and temporal variations in rainfall triggered landslide, International Institute for Aerospace Survey and Earth Science, 32.
  46. Yen, B.C., Chow, V.T., 1980, Design hyetographs ofr small drainage structures, Journal of the Hydraulics Division, ASCE, 106(6), 1055-1076.
  47. Yuan, J., Papaioannou, I., Mok, C.M., Straub, D., 2015, Reliability analysis of infinite slope under intense rainfall considering soil variability, ISGSR, 1-29.