DOI QR코드

DOI QR Code

유한차분해석을 통한 쏘일네일링 설치각도가 사면 보강효과에 미치는 영향

Influence of Soil Nailing Angle on Slope Reinforcement Effect by Finite Difference Analysis

  • 유광호 (수원대학교 토목공학과) ;
  • 민경선 (수원대학교 토목공학과)
  • 투고 : 2013.01.04
  • 심사 : 2013.08.20
  • 발행 : 2013.08.31

초록

사면보강을 위한 쏘일네일링 설계 시 한계평형법을 기초로 하는 프로그램이 주로 사용되고 있다. 하지만 사용 프로그램들은 지반과 쏘일네일링의 상호작용을 제대로 반영하지 못하는 단점을 가지고 있어 이를 보완할 필요가 있다. 또한 경제적인 시공 및 설계를 위해 쏘일네일링 보강패턴에 대한 연구가 요구된다. 본 연구에서는 지반과 쏘일네일링의 상호작용이 고려되는 유한차분해석을 실시하여, 쏘일네일링의 보강효과를 비교 분석하였다. 그 결과 사면으로부터 네일까지의 각도가 $90^{\circ}$가 될 때 활동면이 최대로 커짐에 따라 최대안전율을 보였다.

LEM (Limit Equilibrium Method) based programs are commonly used for the designs of soil nailing as a slope reinforcement. However, there is a drawback that the interaction between ground and soil nailing is not properly reflected in those programs, which needs to be solved. For economical constructions and designs, research is also required on the support pattern of soil nailing. In this study, therefore, reinforcement effects of soil nailing were compared and analyzed by performing finite difference analyses which could properly consider the interaction between ground and soil nailing. As a result, when the angle from slope to nail is $90^{\circ}$, failure slip surface becomes the largest and thus the factor of safety becomes maximum.

키워드

참고문헌

  1. Bang, C. S., Lee, J. S., Lee, H. U., and Go, D. C. (2003), "Numerical analysis of reinforcement effect with grouting method around rail tunnel", 2003 Fall Conference of the Korean Society for Railway, pp.579-584.
  2. Eom, K. H. (2009), A study on slope-stabilizing effect of soil nailing in soil slopes, Chungang University, Graduate School of Construction Engineering, Master Thesis, 93p.
  3. Itasca Consulting Group, Inc. (2005), Fast Lagrangian Analysis of Continua, Ver. 5.0, Itasca Consulting Group, Minnesota, USA.
  4. Jang, Y. S. (2010), Soil Mechanics, Book Publisher CIR, 613p.
  5. Lee, J. K. (2012), Applicability evaluation of reinforced ribs of shotcrete and cablebolts as tunnel supports, University of Suwon, Graduate School, Ph,D. Thesis, 165p.
  6. Ministry of Land, Transport and Maritime Affairs (2011), Ministry of Land, Transport and Maritime Affairs Enactment : Construction Work, Slope Design Criteria, 122p.
  7. Mitchell, J. K. and Villet, W. C. B. (1987), "Reinforcement of earth slopes and embankment", National Cooperative Highway Research Program, Washington, pp.258-323.
  8. Ortigao, J. A. R., Palmeira, E. M., and Zirlis, A. C. (1995), "Experience with soil nailing in Brazil", Geotechnical Engineering, Vol.113, No.2, pp.93-106.
  9. Schlosser, F. (1982), "Behavior and design of soil nailing", Proceedings of the Symposium on Recent Development in Ground Improvement Techniques, Asian Institute of Technology, Bangkok, Thailand, pp.399-413.
  10. Stocker, M. F., Korber, G. W., Gassler, G., and Gudehus, G. (1979), "Soil nailing", International conference on soil reinforcement, Paris, Vol.2, pp.469-474.
  11. St. John, C. M. and Van Dillen, D. E. (1983), "Rockbolts: a new numerical representation and its application in tunnel design in rock mechanics - theory - experiment - practice", Proceedings of the 24th U.S. Symposium on Rock Mechanics, Texas A&M University, pp.13-26.

피인용 문헌

  1. 유한차분해석과 한계평형해석의 비교를 통한 평면파괴 사면 쏘일네일링 보강효과 연구 vol.30, pp.11, 2013, https://doi.org/10.7843/kgs.2014.30.11.5