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2019 Vol.29, Issue 3 Preview Page

Research Article

Relationship between the P Wave Velocity, Static Elastic Modulus, and Dynamic Elastic Modulus of Rocks

암종별 P파 속도, 정탄성계수 및 동탄성계수의 상관관계 분석 연구

Seong-Woo Moon1
,
Hyeong-Sin Kim2
,
Hyun-Seok Yun3
,
Yong-Seok Seo4*
문 성우1
,
김 형신2
,
윤 현석3
,
서 용석4*
1Ph.D. Candidate, Department of Earth and Environmental Sciences, Chungbuk National University
2Ph.D. Student, Department of Disaster Prevention Engineering, Chungbuk National University
3Postdoctoral Researcher, Department of Earth and Environmental Sciences, Chungbuk National University
4Professor, Department of Earth and Environmental Sciences, Chungbuk National University
1충북대학교 지구환경과학과 박사수료
2충북대학교 방재공학 학과간협동과정 박사과정
3충북대학교 지구환경과학과 박사후 연구원
4충북대학교 지구환경과학과 교수
*Corresponding Author
30 September 2019. pp. 339-349
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Abstract

The relationship between the P wave velocity, static elastic modulus, and dynamic elastic modulus of different rock types was investigated to identify the distributive characteristics of the dynamic elastic modulus. Laboratory and in situ test results from 1,646 rock specimens, which are obtained for design and construction of structure, were analyzed, and grouped into three key rock types: gneiss, granite, and sandstone. These relationships were verified by comparing them with the results from previous studies. The gneiss samples exhibit a linear P wave velocity-static elastic modulus relationship, whereas the granite and sandstone samples exhibit exponential relationships. Their coefficient of determination (R2) values are all in the 0.491-0.642 range, and are similar to those obtained in previous studies. The relationship between the static and dynamic elastic modulus exhibits a linear relationship for all rock types, yielding a coefficient of determination in the 0.543-0.676 range. The relationship between the P wave velocity and static elastic modulus follows an exponential regression for all rock types, with a high coefficient of determination that is in the 0.875-0.940 range.

Keywords
P wave velocity
static elastic modulus
dynamic elastic modulus
rock type

국내 40개 구조물 설계 시 수행된 1,646개의 실내 및 현장시험 결과를 활용하여 국내 암종에 따른 동탄성계수의 분포특성을 파악하기 위하여 암종별 P파 속도, 정탄성계수, 동탄성계수 간의 상관식을 도출하고 기존 연구사례와 비교하여 검증하였다. P파 속도와 정탄성계수의 관계를 살펴보면 편마암에서는 선형, 화강암과 사암에서는 지수 함수의 관계를 보인다. 결정계수(R2)는 0.491~0.642로 높지 않지만, 결정계수를 0.836~0.990로 제시하고 있는 기존의 연구사례와 유사한 분포범위를 보인다. 정탄성계수와 동탄성계수의 상관식은 모든 암종에서 선형적인 관계를 보이며, 결정계수는 0.543~0.676이다. P파 속도와 동탄성계수의 상관식은 지수함수의 관계를 보이며, 결정계수는 0.875~0.940으로 높게 나타난다.

키워드
P파 속도
정탄성계수
동탄성계수
암종
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 29
  • No :3
  • Pages :339-349
  • Received Date : 2019-09-06
  • Revised Date : 2019-09-10
  • Accepted Date : 2019-09-10
  • DOI :https://doi.org/10.9720/kseg.2019.3.339
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