Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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A Study on Decreasing Behavior of Strength & Elastic Parameters due to Water Infiltration in Rock Cores (I)

침투류에 의한 암석시료의 함수 저감거동 연구 (I)

  • 조홍제 (울산대학교 건설환경공학부) ;
  • 문종규 (동명기술공단(주)) ;
  • 정일수 (울산대학교 대학원, (주)부광엔지니어링)
  • Received : 2012.06.05
  • Accepted : 2012.08.24
  • Published : 2012.09.28
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Abstract

A study on strength decrease due to water contents through infiltration has been conducted with 9 rocks of high frequency in Korea. It has been proved that a strength decrease through infiltration has high dependence on rock strengths ranges while the species of rock have no impact. It has been found that the weaker the rocks are, the more sensitive the strength decreases are, and that water content of 0.5% corresponds to strength decrease of almost 50%. Another finding is that most rocks have a failure when water content is about one quarter~one half of its saturation. It has been shown that the weakening of rock strength due to water content results from leaching and the weakening of bonding strength of cementation materials.

국내에서 출토빈도가 높은 9개 암종을 대상으로 침투에 의한 함수시 강도저감에 대한 연구를 시행하였다. 함수에 의한 강도저감은 암종에 관계없이 암석강도에 지배된다는 사실을 확인하였다. 강도가 약한 암일수록 강도저감 민감도가 예민함을 알 수 있다. 강도에 따라 0.5%의 함수비에 50% 내외의 강도 저감현상이 발생하는 일은 매우 흔하게 관찰된다. 대부분의 암석은 포화함수비의 1/4~1/2의 포화에서 파괴가 일어난다는 사실도 확인할 수 있었다. 함수시 암석강도의 약화는 교질물질의 접착강도 약화와 용탈에 의한 것으로 사료된다.

Keywords

References

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