한국안전학회지 (Journal of the Korean Society of Safety)

  • 제32권3호
  • /
  • Pages.41-47
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  • 2017
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  • 1738-3803(pISSN)
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  • 2383-9953(eISSN)
한국안전학회 (The Korean Society of Safety)
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안전한 토석류 관리를 위한 계측기 선정에 관한 연구

Study of Determination in Measurement System for Safely Managing Debris-Flow

  • 민대홍 (대전대학교 건설안전방재공학과) ;
  • 윤형구 (대전대학교 건설안전방재공학과)
  • Min, Dae-Hong (Department of Construction Safety And Disaster Prevention Engineering, Daejeon University) ;
  • Yoon, Hyung-Koo (Department of Construction Safety And Disaster Prevention Engineering, Daejeon University)
  • 투고 : 2017.02.20
  • 심사 : 2017.06.21
  • 발행 : 2017.06.30
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초록

Recent studies have shown that there are various systems which can be used to monitor hazardous area in a debris flow location, but lack of methodological research on the exact location where each instrument should be installed has hindered the success of this systems. The objective of this study is to suggest the measurement system for monitoring debris-flow and propose the effective method to determine location of measurement system. Previously studied, from 1991 to 2015, were referred and the applied ratio of every instrument was investigated. The measurement information was divided into 8 categories including rainfall, debris-flow velocity, displacement, fluid pore pressure, ground vibration, image processing, impact force and peak flow depth. The result of this study revealed that the most applied instruments to be rain gauge and geophone for measuring average rainfall and ground vibration respectively. The Analytic Hierarchical Process (AHP) method was selected to determine installation location of instrument and the weighting factors were estimated through fine content, soil thickness, porosity, shear strength, elastic modulus, hydraulic conductivity and saturation. The soil thickness shows highest weights and the fine content relatively demonstrates lowest weights. The score of each position can be calculated through the weighting factors and the lowest score position can be judged as the weak point. The weak point denotes the easily affecting area and thus, the point is suitable for installing the measurement system. This study suggests a better method for safely managing the debris-flow through a precise location for installing measurement system.

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