The Journal of the Convergence on Culture Technology (문화기술의 융합)

The International Promotion Agency of Culture Technology (국제문화기술진흥원)
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Geologic Structure and Rocks as Geotechnical Risk Factors at Intermediate depth Tunneling in Korea

한국의 대심도 터널 지반 위험인자로서 암석과 지질구조

  • 임명혁 (대전학교 건설안전공학과)
  • Received : 2022.04.07
  • Accepted : 2022.04.30
  • Published : 2022.05.31
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Abstract

Geotechnical risk factors encountered in intermediate-depth underground tunnel construction are diverse, and the types and standards of risk factors are different according to the depth and regional geological characteristics of Korea. In order to understand the effects of geological characteristics and geologic structure on safety, which show various porous characteristics of urban underground complex ground, the risk factors of intermediate-depth rock mass in Korea were analyzed based on domestic and foreign cases. As a result of the study, seven categories affecting the stability of the intermediate-depth tunneling, namely, geologic structure, rock characteristics, hydrogeology, overburden, high stress, ground characteristics and artificial structures, and about 22 risk factors were derived. We present the risk criteria and interval values for risk evaluation of faults, folds, dikes, and rocks that have the greatest influence among risk factors. Criteria and interval values for other risk factors are under study.

대심도 지하 터널 공사에서 마주치는 지반공학적 위험인자는 다양하며, 심도와 한국의 지역적 지질특성에 따라 위험인자의 종류와 기준이 다르다. 도심 지하 복합 지반의 다양한 다공질의 특성을 보이는 지질의 특성 및 지질구조가 안전성에 미치는 영향을 이해하기위해 국내외 사례를 바탕으로 한국의 대심도 암반의 위험 인자를 분석하였다. 연구 결과 대심도 터널지반의 안정성에 영향을 주는 7개의 카테고리들 즉, 지질구조, 암반특성, 수리지질, Overburden, 높은 응력, 지반특성 및 인공 구조물과 약 20 여개의 위험인자들이 도출 되었다. 위험인자들 중 가장 영향력이 큰 단층, 습곡, 암맥 및 암석 종류에 따른 위험기준 및 위험산정을 위한 구간 값을 제시한다. 다른 인자들의 기준과 구간 값은 연구 중에 있다.

Keywords

Acknowledgement

본 연구는 국토교통부/국토교통과학기술진흥원의 (도심 지하 교통 인프라 건설 및 운영기술 고도화 연구, 과제번호: 20UUTI-B157786-01) 지원으로 수행되었음으로 이에 깊은 감사를 드립니다.

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