Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Estimation of R-value and Uniaxial Compressive Strength of Rocks around the King Sejong Station, Barton Peninsula, Antarctica from SilverSchmidt Q-value

실버슈미트 Q값으로부터 남극 바톤반도 세종과학기지 주변 암석의 R값 및 일축압축강도 추정

  • 임현수 (부산대학교 지질환경과학과) ;
  • 장보안 (강원대학교 지구물리학과) ;
  • 김정한 (조선대학교 에너지자원공학과) ;
  • 강성승 (조선대학교 에너지자원공학과)
  • Received : 2015.03.19
  • Accepted : 2015.04.14
  • Published : 2015.04.30
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Abstract

The rebound hardness test using the SilverSchmidt hammer was performed for diorite, granodiorite, and andesite exposed around the King Sejong Station, Barton peninsula. Then, the R-value and uniaxial compressive strength (UCS) of these rocks were estimated from the Q-values which were obtained from the SilverSchmidt hammer. The Q-value of diorite was distributed in the range from 67.0 to 89.5, granodiorite of the range from 57.5 to 89.0, and andesite of the range from 58.0 to 76.5. The average Q-values of diorite, granodiorite, and andesite were 76.0, 72.0, and 67.0, respectively. The converted UCS of diorite was distributed in the range from 118 to 195 MPa, granodiorite of the range from 91 to 193 MPa, and andesite of the range from 92 to 148 MPa. The average UCS of diorite, granodiorite, and andesite were 147, 136, and 117 MPa, respectively. The converted R-value of diorite was distributed in the range from 53.0 to 72.2, granodiorite of the range from 45.4 to 71.8, and andesite of the range from 45.8 to 60.9. The average Q-values of diorite, granodiorite, and andesite were 60.0, 58.0, and 53.0, respectively. The R-value was represented approximately 20% lower than the Q-value. In conclusion, it will be possibile that the R-value and UCS of rocks under the extreme area from the SilverSchmidt Q-value are evaluated.

남극 바톤반도 세종과학기지 주변에서 관찰되는 섬록암, 화강섬록암, 안산암 노두에서 실버슈미트 반발경도측정을 실시하였으며, 그 결과로부터 얻은 Q값을 이용하여 암석의 R값과 일축압축강도(UCS)을 추정하였다. Q값의 경우, 섬록암은 67.0~89.5, 화강섬록암은 57.5~89.0, 안산암은 58.0~76.5 범위를 보였다. Q값 평균은 섬록암 76.0, 화강섬록암 72.0, 안산암 67.0을 보였다. Q값으로부터 환산한 UCS의 경우, 섬록암은 118~195 MPa, 화강섬록암은 91~193 MPa, 안산암은 92~148 MPa 범위를 보였으며, UCS 평균은 섬록암 147 MPa, 화강섬록암 136 MPa, 안산암 117 MPa를 나타내었다. 또한 Q값으로부터 환산한 R값의 경우, 섬록암은 53.0~72.2, 화강섬록암은 45.4~71.8, 안산암은 45.8~60.9의 범위를 보였으며, R값 평균은 섬록암 60.0, 화강섬록암 58.0, 안산암 53.0을 나타내었다. R값은 Q값의 약 20% 정도로 낮게 나타났다. Q, UCS, R값의 범위를 고려해 볼 때, 섬록암은 대체적으로 높은 값에 분포한 반면, 안산암은 낮은 값에 분포하였고, 화강섬록암은 낮은 값에서 높은 값까지 넓은 범위에 분포하였다. 결과적으로 실버슈미트 Q값으로부터 극한 지역에서의 암반에 대한 R값과 UCS 평가는 가능할 것으로 판단된다.

Keywords

References

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