Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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A Comparative Study of Safe Factor of Slope according to Analysis Methods

해석 방법에 따른 비탈면 최소안전율 비교 연구

  • Ryu, Hang Taek (Gyeongsangnam-do Provincial Government) ;
  • Jang, Jeong Wook (School of Civil, Environmental and Chemical Engineering, Changwon National University) ;
  • Chung, Youn In (School of Architecture and Civil Engineering, Keimyung University)
  • 류항택 (경상남도청) ;
  • 장정욱 (창원대학교 토목환경화공융합공학부) ;
  • 정연인 (계명대학교 건축토목공학부)
  • Received : 2018.09.05
  • Accepted : 2018.10.01
  • Published : 2018.10.31
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Abstract

This research compared and analyzed safety ratio of slope with Talren97 and SoilWorks based on limit equilibrium analysis and Midas GTS based on finite element analysis. For the analysis variables, there are slope height, berm condition, soil parameter, groundwater level, slope inclination. All of slope stability analysis were performed by dividing into dry season and rainy season. As the result of the analysis of Talren97 and SoilWorks based on same theory, safety ratio of slope shows same value, so there was no difference between the programs. In comparison with limit equilibrium analysis, the result of finite element analysis showed somewhat high ratio of safety and it was higher by about 2.4% averagely. The difference between the result of limit equilibrium analysis and that of finite element analysis is in the range which can ignored in practical work.

본 연구에서는 한계평형해석에 근거하는 Talren97과 SoilWorks 그리고 유한요소해석에 근거하는 Midas GTS를 이용하여 비탈면의 최소안전율을 비교 분석하였다. 해석 변수로는 비탈면 높이, 소단조건, 지반정수, 지하수위, 비탈면 경사이며 지하수위를 제외한 모든 변수들에 대한 해석은 건기와 우기로 나누어 수행하였다. 그 결과 동일한 이론을 기반으로 하는 Talren97과 SoilWorks에 의한 비탈면 최소안전율은 동일한 값을 나타내어 프로그램간의 차이는 없는 것으로 확인되었다. 한계평형해석에 비하여 유한요소해석 결과가 다소 높은 안전율을 나타내었으며 평균적으로 약 2.4% 높게 나타나는 것으로 확인되었다. 그러나 한계평형해석과 유한요소해석의 결과 값 차이는 실무에서는 무시할 수 있는 범위이므로 프로그램 및 해석방법에 따른 비탈면 안전율의 차이는 없는 것으로 판단되었다.

Keywords

References

  1. Bishop, A.W. (1955). The use of slip circle in the stability analysis of Earth Slopes. Geotechnique, 5(1), 7-17. https://doi.org/10.1680/geot.1955.5.1.7
  2. Fellenius, W. (1927). Erdstatische Berechnungen. revised edition, W. Ernst u. Sons, Berlin.
  3. Janbu, N. (1957). Earth pressure and bearing capacity calculations by generalized procedure of slices. Proceedings of 4th international conference, SMFE, London, 2, 207-212.
  4. Janbu, N. (1968). Slope stability calculations. Soil Mechanics and Foundation Engineering Report, The Technical University of Norway, Trondheim.
  5. Midasit (2013). Analysis Reference (in Korean).
  6. Midasit (2013). Verification Manual SoilWorks (in Korean).
  7. Spencer, E. (1967). A method of analysis of the stability of embankments assuming parallel inter-slice forces. Geotechnique, 17(1), 11-26. https://doi.org/10.1680/geot.1967.17.1.11
  8. Ryu, H.T. (2013). A Comparative Study of Safe Factor of Slope with Analysis Methods. Master's Thesis, Changwon University (in Korean).