Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Relationship between Electrical Resistivity and Hydraulic Resistance Capacity measured by Rotating Cylinder Test

회전식 수리저항성능 실험기를 이용한 지반의 수리저항특성과 전기비저항 특성의 상관관계

  • 김영상 (전남대학교 해양토목공학과) ;
  • 정신현 (동아기술공사 설계사업부 지반팀)
  • Received : 2014.09.22
  • Accepted : 2015.02.03
  • Published : 2015.02.28
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Abstract

Recently, constructions of coastal structure including wind turbine structure have increased at southwest shore of Korea. There is a big difference of tide which rage from 3.0 m to 8.0 m at south and wet shore of Korea, respectively. In such ocean circumstance, large scour may occur due to multi-directional tidal current and transverse stress of the wind. therefore scour surrounding wind turbine structure can make system unsafe due to unexpected system vibration. In this study, hydraulic resistance capacity, i.e., critical velocity and critical shear stress, was evaluated by RCT. Uni-directional and bi-directional hydraulic resistance capacities of the samples which were consolidated by different preconsolidation pressures were correlated with soil resistivities of same samples. According to the correlation, it is possible to estimate hydraulic resistance capacity from electrical resistivity of soil. Through the updating the correlation for various soil types, it is expected that the hydraulic resistance capacity of whole construction site will be simply determined from the electrical resistivity.

우리나라 남서해안은 풍력발전에 최적지로 평가받고 있으며 최근 해상풍력 구조물을 포함하는 해안구조물의 건설이 증가하고 있다. 그러나 우리나라 남서해안의 조차는 3~8 m까지 발생하여 남서해안에 설치되는 풍력기초들은 횡방향력과 조류의 다방향 흐름에 의한 세굴로 전체 구조물에 예상치 못한 진동에 의한 불안정성이 야기될 수 있다. 이 연구에서는 회전식 수리저항성능 실험기를 이용하여 인공지반시료의 수리저항성능을 평가하였으며 전기비저항 측정결과와 비교하여 수리저항성능과 전기비저항 특성과의 상관관계에 대한 연구를 진행하였다. 실험결과 일방향 한계전단응력과 양방향 한계전단응력을 상한계와 하한계로 표시하고 전기비저항 특성과 상관관계를 도시하면 조립토와 세립토가 비교적 명확히 구분되고 한계전단응력과의 상관관계 도출이 가능한 것으로 나타났다.

Keywords

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