Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Study on Performance-based Evaluation Method for Rock Slopes : Deduction of Weight and Validation - Based on the AHP method and Correlation Analysis -

암반비탈면의 성능기반 평가기법 연구 : 가중치 도출 및 검증 - AHP 기법과 상관분석을 중심으로 -

  • 이종건 (한국시설안전공단 국도시설성능관리실) ;
  • 허인영 (한국시설안전공단 국도시설성능관리실) ;
  • 강창규 (한국시설안전공단 국도시설성능관리실) ;
  • 류호상 (한국시설안전공단 국도시설성능관리실) ;
  • 장범수 (한국시설안전공단 경영혁신실)
  • Received : 2016.10.05
  • Accepted : 2016.10.24
  • Published : 2016.10.31
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Abstract

This study aims to suggest the detailed evaluation criteria based on performances for rock slopes. Using the previous research result, final evaluation items are proposed considering characteristics and similarities of each evaluation item. Weight for each evaluation item is deducted using AHP method, verification for suggested evaluation criteria is conducted based on correlation analysis. The research results as follows. All evaluation items have a high statistical correlation with final evaluation result(safety rating). Especially, items of the "rockfall", "ground deformation", "discontinuity characteristic", "instable lithology" were shown the highest in relative correlation coefficient(R), It is judged that items and weight presented in this study well reflect characteristics of rock slopes.

본 연구에서는 암반비탈면의 성능기반 평가기법을 제시하기 위해 이전 연구에서 도출된 평가 항목의 항목별 특성과 유사성 등을 검토하여 최종 평가항목을 도출하였다. 또한, 평가항목별로 상대적 중요도를 산출하여 평가항목의 가중치를 도출하였으며 암반비탈면에 대한 성능별 평가표를 제시하였다. 제시된 평가기준은 상관 분석을 이용해 검증을 실시하였다. 주요 연구결과는 다음과 같다. 각 성능별로 제시된 평가표를 활용하여 실제 조사 자료를 적용한 상관분석 결과, 모든 평가항목에서 유의 확률이 0.05 이하로 나타나 통계적으로 유의미한 결과가 도출되었고, 전체적으로 높은 상관성을 보였다. 특히, '낙석', '지반변형', '불연속면 특성', '불안정 지질' 등의 항목에서 상대적 상관계수(R)가 가장 높게 나타나 본 논문에 제시된 평가표는 암반비탈면의 특성을 적절히 반영하고 있다고 판단된다.

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