터널과지하공간 (Tunnel and Underground Space)

  • 제28권5호
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  • Pages.476-492
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  • 2018
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  • 1225-1275(pISSN)
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  • 2287-1748(eISSN)
한국암반공학회 (Korean Society for Rock Mechanics and Rock Engineering)
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포화에 의한 암석물성 변화에 대한 실험적 연구

Experimental Study on the Change of Rock Properties due to Water Saturation

  • 최승범 (서울대학교 공과대학 에너지시스템공학부) ;
  • 이수득 (서울대학교 공과대학 에너지시스템공학부) ;
  • 전석원 (서울대학교 공과대학 에너지시스템공학부)
  • Choi, Seung-Beom (Department of Energy Resources Engineering, Seoul National University) ;
  • Lee, Sudeuk (Department of Energy Resources Engineering, Seoul National University) ;
  • Jeon, Seokwon (Department of Energy Resources Engineering, Seoul National University)
  • 투고 : 2018.10.12
  • 심사 : 2018.10.27
  • 발행 : 2018.10.31
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초록

본 연구에서는 한반도 남부 지역에서 취득 가능한 응회암, 현무암, 섬록암 시험편에 대하여 다양한 실내 시험을 수행하였다. 건조/포화 조건으로 대별하여 실내실험을 수행했으며 이를 바탕으로 포화에 따른 암석 물성변화를 실험적으로 고찰하였다. 실험결과, 비교적 공극률이 작은 시험편을 대상으로 했음에도 불구하고 확연한 강도 저하와 변형 특성 변화가 관찰되었다. 실험결과를 바탕으로 암석의 주요 역학적 물성인 일축압축강도, 탄성계수, 간접인장강도를 예측할 수 있는 회귀모델을 구성하였다. 비파괴 물성인 P파 속도, Shore 경도를 독립변수로 이용하였으며 그 결과 만족할 만한 수준의 물성 예측 모델이 구성되었음을 확인하였다.

In this study, various laboratory experiments were conducted on tuff, basalt and diorite specimens, which were obtained in the southern part of Korean Peninsula. Experiments were performed under dry and water saturated conditions. Results showed that strength degradation and change of deformation characteristics were remarkable although the specimens had small porosity. Based on the results, regression models that are capable of predicting important mechanical rock properties, such as uniaxial compressive strength, Young's modulus, Brazilian tensile strength were proposed. P-wave velocity and Shore hardness were selected as independent variables and the results showed satisfactory prediction performance for the experimental data collected in this study.

키워드

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