Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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A Review on Past Cases of Geophysical Explorations for Assessment of Slope Stability

사면 안정성 평가를 위한 물리탐사 적용 사례 분석

  • Cho, Ahyun (Department of Energy and Mineral Resources Engineering, Sejong University) ;
  • Joung, Inseok (Department of Energy and Mineral Resources Engineering, Sejong University) ;
  • Jeong, Juyeon (Department of Energy and Mineral Resources Engineering, Sejong University) ;
  • Song, Seo Young (Department of Energy and Mineral Resources Engineering, Sejong University) ;
  • Nam, Myung Jin (Department of Energy and Mineral Resources Engineering, Sejong University)
  • 조아현 (세종대학교 에너지자원공학과) ;
  • 정인석 (세종대학교 에너지자원공학과) ;
  • 정주연 (세종대학교 에너지자원공학과) ;
  • 송서영 (세종대학교 에너지자원공학과) ;
  • 남명진 (세종대학교 에너지자원공학과)
  • Received : 2022.01.30
  • Accepted : 2022.02.26
  • Published : 2022.02.28
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Abstract

Since landslide can cause huge damages to many facilities, close characterization of slopes is needed for appropriate reinforcements for the unstable ones in order to prevent the damages. Geophysical surveys, which can characterize a large area at a relatively low cost without disturbing slopes, have been widely employed for the assessment of slope stability in other countries. However, only conventional direct investigation methods are mainly used in Korea. In this paper, we analyzed various cases, which evaluated slope stabilities by characterizing slopes using geophysical exploration. First, we introduced changes in geophysical properties due to unstable media of slope like fracture location, fracture connectivity and distribution of groundwater level, and subsequently discussed the applicability of geophysical methods to the detection of the changes; the methods include electrical resistivity survey, seismic survey, self-potential survey, induced polarization survey and ground penetrating radar. Based on this description, we analyzed how geophysical surveys were performed on various slopes.

산사태가 발생하면 많은 시설에 큰 위험을 초래할 수 있기 때문에, 이를 예방하기 위해 사면의 특성을 상세하게 조사하고 불안정한 사면에 대해서는 적절히 보강을 수행해야 한다. 물리탐사는 사면을 교란시키지 않고 비교적 저렴한 비용으로 넓은 영역의 특성을 조사할 수 있는 방법으로, 외국에서는 사면의 안정성 조사에 널리 쓰이고 있는 반면 국내에서는 물리탐사 외의 직접적인 조사 방법들이 주로 쓰이고 있다. 이 논문에서는 물리탐사를 이용하여 사면의 특성을 파악하여 안정성을 평가한 사례들을 분석하고자 한다. 먼저 불안정한 사면물질, 균열 위치 및 연결성, 지하수위 분포에 따른 물성의 변화 등을 알아본 뒤, 이러한 물성 변화를 파악하기 위해 적용된 물리탐사 기법들인 전기비저항 탐사, 탄성파 탐사를 비롯해 자연전위 탐사, 유도분극 탐사, 지표투과레이더 탐사 등의 적용법에 대해 알아본다. 이에 기초하여, 기존의 여러 사면에서 실제로 수행되었던 물리탐사 사례들을 분석하였다.

Keywords

Acknowledgement

이 논문은 산업통상자원부의 재원으로 KETEP의 지원(No. 20194010201920) 및 원자력안전위원회의 재원으로 사용후핵연료관리핵심기술개발사업단 및 한국원자력안전재단의 지원을 받아 수행된 연구사업(No. 2109092-0121-WT112)입니다.

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