Geotechnical Engineering (한국지반공학회지:지반)

Korean Geotechnical Society (한국지반공학회)
권호 표지

Stability Analysis of Soil Nailed Slope by Discrete Element Method

개별요소법을 이용한 지반네일에 의해 보강된 굴착사면의 안정해석

  • 김주용 (정회원, 한국과학기술원 토목공학과) ;
  • 김준석 (정회원, 한국과학기술원 토목공학과 부교수, 정회원, (주)대우건설기술연구소 선임연구원, 정회원, 한국과학기술원 토목공하콰 석사졸업)
  • Published : 1995.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

Soil nailing has been widely rosed during the last two decades to stabilize sheep excavated slopes in several countries. In thin study, the discrete element method has been applied to evaluate the stability of the reiuorced slope. This method is capable of not only estimat ins tensile and sheer stresses mobilized in nails but also providing individual safety factors of soil and nails, It has been assumed that the nailed slope be comprised of slices connected with elastoplastic twinkler springs. A reasonable mechanism is applied for representing the behavior between nails and adj scent soils. Taking into account for the bequence of construction the developed method well predicts the measured tensile forces developed in nails so that it is possible to appropriately evaluate the overall safety factor.

지반네일을 사용한 급경사면의 보강공법은 지난 20년동안 여러나라에서 사용되어왔다. 본 연구에서는 네일로 보강된 급경사면에 대하여 개별요소법을 이용한 새로운 해석을 수행하였다. 이 방법은 네일에 발생되는 인장응력 및 전단응력을 예측할 수 있어 각 요소별로 지반과 네일의 부분안전율을 산정할 수 있다. 보강된 급경사면은 몇개의 절편으로 나뉘어지고 각 측면들에 탄소성 Winkler 스프링으로 연결되었다고 가정함으로써 거동을 모델링하였다. 네일을 스프링으로 대치시키기 위하여 내일과 주변지반 사이의 합리적인 역학기구가 가정되어 사용되었다. 또한 실제 굴착과정에 따른 네일의 설치단계를 고려함으로써 현장지반에서 관측된 네일의 인장력을 비교적 잘 예측할 수 있어 보다 적절한 안전율 산정이 가능하다.

Keywords

References

  1. 한국지반공학회 지반굴착위원회 학술발표회 (제2집) Soil nailing 공법의 적용 및 설계 김홍택;강인규;최인식;순광수
  2. 한국지반공학회 가을학술발표회 벽체변위를 고려한 Soil nailing 공법의 안정해석 김홍택;강인규;성안제
  3. 사면안정에 관한 학술발표회 Soil nailing : A simplified kinematic analysis Byrne,R.J.
  4. Journal of the Geotechnical Engineering v.118 no.12 Discrete element method for slope stability analysis Chang,C.S.
  5. Proc. Int. Symp. on Rock Fracture v.1 A computer model for simulating progressive, large-scale movements in blick rock systems Cundall,P.A.
  6. Journal of the Geotechnical Engineering v.118 no.12 Discrete element method for slope stability analysis Chang,C.S.
  7. Federal Highway Administration Report FHWA Soil Nailing for Stabiliation of HighwaySlopes and Excavations Elias,V.;Juran,I.
  8. Journal of the Geotechnical Engineering v.116 no.1 Kinematical limit analysis for design of soil-nailed structures Juran,I.;Baudrand,G.;Farrag,K.;Elias,V.
  9. Geotechnical Special Publication no.12 Soil nailed retaining structures : Analysis of case histories Juran,I.;Elias,V.
  10. Journal of the Geotechnical Engineering v.117 no.11 Discussion on kinematical limit analysis for design of soil nailed structures Leshchinsky,D.
  11. NCHRP-290 Reinforcement of earth slopes and embankments Michell,J.K.
  12. Proc. of the Inter. Symp. on Earth Reinforcement Practice v.1 Estimation of in-soil deformation behavior of geogrid under pull-out loading Mitachi,T.;Yamanoto,Y.;Muraki,S.
  13. French research program CLOUTERRE on soil nailing : Geotechnical Special Publication v.12 no.2 Schlosser,F.;Unterreiner,P.;Plumelle,C.
  14. Design and Performance of Earth Retaining Structures, Geotechnical Special Publication, ASCE, No.25, 1990, New York no.25 The bearing behaviour of nailed retaining structures Stocker,M.F.;Riedinger,G.
  15. Geotechnical specialpublication no.25 Design construction and performance of a soil nailed wall in Seattle, Washington Thompson,S.R.;Miller,I.R.