Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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An Estimation of the Excavation Damaged Zone at the KAERI Underground Research Tunnel

한국원자력연구원 내 지하연구시설에서의 굴착손상영역 평가

  • 이창수 (서울대학교 에너지시스템공학부) ;
  • 권상기 (인하대학교 에너지자원공학과) ;
  • 최종원 (한국원자력연구원) ;
  • 전석원 (서울대학교 에너지시스템공학부)
  • Received : 2011.09.27
  • Accepted : 2011.10.17
  • Published : 2011.10.31
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Abstract

In this study, physical, mechanical, and thermal properties of rock samples were investigated to estimate the Excavation Damaged Zone (EDZ) developed during the construction of the KAERI Underground Research Tunnel. The average porosity in the EDZ was increased by about 140%. The average wave velocity, Young's modulus, and uniaxial compressive strength in the EDZ were decreased by about 11, 37, and 16%, respectively. And the thermal conductivity in the EDZ was decreased by about 20%. From the laboratory tests, the EDZ size could be estimated to be around 1.1-2.4 m.

본 연구에서는 굴착 전 후에 채취한 암석시료들에 대해 물리적, 역학적 그리고 열적 물성을 조사하여, KAERI Underground Research Tunnel(KURT)의 건설로 인해 발생된 굴착손상영역(EDZ)을 정량적으로 평가하고자 하였다. 굴착손상영역에서 공극률은 약 140% 정도 증가하였고, 탄성파속도, 탄성계수, 그리고 일축압축강도는 각각 약 11, 37, 그리고 16% 정도 감소하였다. 또한 굴착손상영역에서의 열전도도는 약 20% 정도 감소하였다. 암석물성변화를 이용하여 KURT 굴착손상영역의 범위를 판단한 결과 약 1.1-2.4 m로 나타났다.

Keywords

References

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