한국지반공학회논문집 (Journal of the Korean Geotechnical Society)

한국지반공학회 (Korean Geotechnical Society)
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앵커 하중전이에 따른 사면의 안전율 비교 연구

Comparison of Safety factor for an Anchored Slope in Accordance with the Effects of Load Transfer

  • 김성규 (성균관대학교 건설환경시스템공학과) ;
  • 김낙경 (성균관대학교 건설환경시스템공학과) ;
  • 박종식 (한화건설 기술연구소 토목연구팀) ;
  • 주용선 (성균관대학교 건설환경시스템공학과) ;
  • 김태훈 ((주)대우건설기술연구소)
  • Kim, Sung-Kyu (Dept. of Civil, Architectural & Environmental, System Eng., Sungkyunkwan Univ.) ;
  • Kim, Wak-Kyung (Dept. of Civil, Architectural & Environmental, System Eng., Sungkyunkwan Univ.) ;
  • Park, Jong-Sik (Hanwha Institute of Construction Technology, Hanwha E&C Co, Ltd.) ;
  • Joo, Yong-Sun (Dept. of Civil, Architectural & Environmental, System Eng., Sungkyunkwan Univ.) ;
  • Kim, Tae-Hoon (Daewoo Institute of Construction Technology, Daewoo E&C Co. Ltd.)
  • 발행 : 2008.11.30
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초록

본 논문에서는 앵커로 보강된 사면에 대한 안정해석시 앵커의 하중전이 메커니즘이 사면의 전체 안전율에 어떻게 영향을 미치는지를 알아보았다. 사면안정해석 방법에는 한계평형해석범, 유한요소해석법 및 스프레드시트를 이용하는 방법이 있으며 각각의 방법을 통해 안전율을 산정하여 서로 비교하였다. 앵커로 보강된 사면의 안정해석을 위해 가장 널리 사용되고 있는 방법은 한계평형해석 법으로 사용이 간편하다는 특징을 가지고 있다. 그러나 한계평형해석방법에서는 사면의 파괴면이 정착장을 통과하거나 정착장 바깥쪽을 지날 때에는 사면의 전체 안전율에 아무런 영향을 주지 못 하기 때문에 실제보다 보수적인 설계가 이루어질 수 있다. 따라서 본 논문에서는 각각의 해석방법을 이용하여 앵커로 보강된 사면의 안정해석을 수행하고 안전율을 비교하였다.

This paper presents how the load transfer mechanism of the ground anchor affects on the stability analysis of anchored slope. The finite element analysis and the conventional limit equilibrium analysis on the anchored slope were performed and compared. The limit equilibrium analysis of the anchored slope is widely used in design practice due to the easiness of the analysis. However, the load transfer mechanism is not considered properly for the analysis. When the failure surface passes through the bonded length of an anchor, the anchor load is disregarded and the factor of safety for the anchored slope is smaller than it should be. In this study, the load transfer distribution was incorporated into the limit equilibrium stability analysis of the anchored slope and the results were compared with those of finite element analysis.

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참고문헌

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