Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Behavior Analysis Using FEM for Earth Retaining Wall of Soft Rock Fracture Zone

FEM을 이용한 연암 파쇄대 지반의 흙막이 벽체 거동 분석

  • 장기수 (서울시립대학교 토목공학과) ;
  • 박민철 (서울시립대학교 토목공학과) ;
  • 신효희 (대림대학교 토목환경공학과) ;
  • 이송 (서울시립대학교 토목공학과)
  • Received : 2013.03.18
  • Accepted : 2013.04.23
  • Published : 2013.07.30
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Abstract

A soft rock fracture zone is an important element for rock slope or earth retaining, however stability studies of earth retaining wall have been lack. Therefore, this study is analyzed for a behavior of earth retaining wall with condition of fracture zone or no fracture zone and then a numerical analysis (Finite Element Method) was performed considering interaction with field monitoring data between ground and structures. As a result, applied horizontal displacement on retaining wall is correspond between result of numerical analysis and field monitoring data and displacement point stress distribution with fracture zone condition analyzed to be stable side but no fracture zone condition is expressed to be unstable side. The results of this study is purpose for applying safety construction as a top priority at field when designing for future.

연암 파쇄대는 암반 사면이나 흙막이 공법에서 중요한 요소 중의 하나이지만, 흙막이 벽체의 안정성 연구는 미흡한 실정이다. 따라서 본 연구는 연암 파쇄대에 설치된 조건과 연암 파쇄대에 미설치된 조건에 따른 흙막이 벽체의 거동을 비교 분석하기 위하여 현장 계측데이터와 흙과 구조물의 상호작용을 고려한 유한요소법으로 수치해석 등을 실시하였다. 그 결과 흙막이 벽체에 작용하는 수평변위는 현장 계측결과와 파쇄대 조건의 수치해석 결과와는 거의 일치하는 것으로 나타났으며, 변위 지점 응력분포는 파쇄대 조건에서는 안정측으로 해석되었지만, 파쇄대 미조건에서는 불안정으로 결과가 도출되었다. 이 연구결과를 추후 설계 시 현장의 안전을 최우선으로 한 시공에 적용하는데 목적이 있다.

Keywords

References

  1. Briaud, J. L. and Kim, N. K., "Beam-column method for tieback walls", J. Geotech. Geoeniron. Engineering, American Society of Civil Engineers, Vol. 124, No. 1, 1998, pp.67-79.
  2. Clough, G. W. and Duncan, J. M., "Finite element analyses of retaining wall behavior", J. Geotech. Eng, American Society of Civil Engineers, Vol. 97, No. 12, 1971, pp.1657-1673.
  3. Clough, G. W. and O'Rourke, T. D., "Construction induced movements of in-situ walls design and performance of earth retaining structures", Proceeding of a Specialty Conference at Cornell University, ASCE, New York, 1990, pp.439-470.
  4. Jeong, S. S. and Kim, Y. H., "Characteristics of collapsed retaining walls using elasto-plastic method and finite element method", Korean Geotechnical Society, Vol. 4, No. 25, 2009, pp.19-29 (in Korean).
  5. Korean Tunnelling Association, "Case histories of tunnel", CIR Press, 2010, pp.379-383 (in Korean).
  6. Lee, J. H., Lee, J. S., Hwang, E. S., Cho, S. H., "Analysis of monitoring results and back analysis for rigid diaphragm wall supported by ground anchor", Korean Geotechnical Society, Vol. 5, No. 25, 2009, pp.39-46 (in Korean).
  7. Lee, s. and Kim, J. H., "The analysis of the important problems on designing and constructing earth retaining structures", Journal of the Korea Institute for Structural Maintenance and Inspection, Vol. 2, No. 6, 2002, pp.167-174 (in Korean).
  8. Mana, A. I. and Clough, G. G., "Prediction of movements for braced cuts in clay", Journal of the Geotechnical Engineering Division, American Society of Civil Engineers, Vol. 107, No. 6, 1981, pp.759-777.
  9. Otta, L. H., Pantucek, H. and Goughnour, P. R., "Permanent ground anchors, stump design criteria, office of reseracrch and development", Fed. Hwy. Admin., U.S Dept. Transp, Washington, D.C., 1982, pp.25-35.
  10. Peck, R. B., "Deep excavations and tunnelling in soft ground", 7th International Conference Soil Mechanics and Foundation Engineering, State of Art, 1969, pp.225-290.
  11. Skempton, A. W. and McDonald, D. H., "Allowable settlement of buildings", Proceedings of the Institute of Civil Engineers, London, England, Part 3, Vol. 6, No. 5, 1955, pp.727-768.
  12. Terzaghi, K. and Peck, R. B., "Soil mechanics in engineering practice", 2nd Edition, John Wiley and Sons, New York, 1967, pp.394-413.
  13. Tschebotarioff, G. P. and Klein, G. K., "Lateral pressures of clayey soil on structures", Specialty Session, 8th International Conference Soil Mechanics and Foundation Engineering, Vol. 4, No. 5, 1973, pp.227-266.
  14. Yoo, C. S. and Choi, G. N., "Urban excavation-induced ground movement in water bearing ground using stress-pore pressure coupled analysis", Korean Geotechnical Society, Vol. 5, No. 27, 2011, pp.17-31 (in Korean). https://doi.org/10.7843/kgs.2011.27.5.017