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NTIS 바로가기터널과 지하공간: 한국암반공학회지 = Tunnel and underground space, v.28 no.5, 2018년, pp.476 - 492
최승범 (서울대학교 공과대학 에너지시스템공학부) , 이수득 (서울대학교 공과대학 에너지시스템공학부) , 전석원 (서울대학교 공과대학 에너지시스템공학부)
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 ch...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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공극률이 큰 암석의 경우 함수율을 실험의 독립변수로 사용할 수 있는 이유는? | , 1981; Dyke and Dobereniner, 1991; Hawkins and McConnell, 1992; Vásárhelyi, 2003; Erguler and Ulusay, 2009; Yilmaz 2010). 공극률이 큰 암석은 단순 포화 조건뿐만 아니라 포화 시간을 조절(수침 혹은 항습기 보관)하여 함수율을 제어할 수 있기 때문에 이를 독립변수로 하여 함수율과 강도/변형 특성 사이의 관계식을 제안할 수 있다(Hawkins and McConnell, 1992; Vásárhelyi and Van, 2006; Romana and Vásárhelyi, 2007; Török and Vásárhelyi, 2010). 또한, 특정 암종에 대하여 건조 물성과 포화 물성 사이의 관계식(Vásárhelyi and Ledniczky, 1999; Vásárhelyi, 2002) 등이 제안되어 왔다. | |
실험 결과를 바탕으로 제시한 주요 암석 물성 예측용 관계식은 무엇인가? | 상기 실험결과를 바탕으로 주요 암석 물성을 예측할 수 있는 경험식을 제안하였다. 비파괴 물성인 P파 속도와, Shore 경도를 독립변수로 하여 이들과 일축압축강도, 탄성계수, 간접인장강도 사이의 관계식을 유도하였다. 멱함수 형태의 모델을 구성했으며 이 는 건조, 포화 상태 모두에서 만족할 만한 상관관계를 보였다. | |
공극률이 작은 암석에 대한 참고문헌을 찾기 힘든 이유는? | 공극률이 작은 암석의 경우 함수율을 제어하면서 실험을 수행하기 어렵기 때문에 상대적으로 참고문헌을 찾기 어려우며 실험조건도 일반적으로 건조/포화 상태로 대별한다. 그럼에도 불구하고 포화에 의해 다양한 역학적 물성 변화가 관찰되며(King, 1983; Li et al. |
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