Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Hazard-Consistent Ground Displacement Estimation for Seismic Input of Underground Utility Tunnels in Korea

국내 재해도에 상응하는 공동구의 지반변위 산정

  • Received : 2021.10.20
  • Accepted : 2021.11.18
  • Published : 2021.12.31
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Abstract

Underground utility tunnels, which contribute to supply of electricity, communication, water and heat, are critical lifelines of an urban area. In case service is discontinued or functional disruption happens, there will be a huge socio-economic impact. For the improved seismic design and evaluation of underground structures, this study proposes a ground displacement measure when the site is subjected to a scenario earthquake based on hazard-consistent source spectra and site amplification/attenuation. This measure provides a rational estimation of ground displacement and can be an alternative to existing response displacement methods.

전력, 통신, 상수, 난방, 중수 등의 공급망을 구성하는 지하공동구는 도시기능을 유지하기 위한 핵심 기간망이며, 재난 및 재해로 서비스의 정지 및 일시적 중단이 발생하는 경우 대규모 사회경제적 손실을 가져온다. 본 연구에서는 지중구조물에 대한 개선된 내진설계 및 평가를 위하여 국내 지진환경에 부합하는 지진원 스펙트럼으로부터 대상 지반의 증폭 및 감쇠 효과를 반영한 시나리오 지진에 기반한 지반변위 예측 방법을 제시하였다. 코사인법으로 통용되는 기존의 단순화 가정법 및 지반응답해석과의 비교를 통해서 본 연구가 제시하는 재해도에 상응하는 지반변위 산정방법이 합리적이며 공학 실무에서 충분히 적용 가능한 것을 확인하였다.

Keywords

Acknowledgement

본 연구는 2021년도 정부(과학기술정보통신부, 행정안전부, 국토교통부, 산업통상자원부)의 재원으로 정보통신기획평가원의 지원을 받아 수행되었습니다(No. 2020-0-00061, 디지털트윈 기반의 지하공동구 화재·재난 지원 통합플랫폼 기술개발). 국내 지반모델에 대한 디지털 데이터를 제공해주신 고 김동수 교수님과 KAIST 지반동역학 연구실에 깊은 감사를 드립니다. 또한, 국내 재해도 모델에 대한 조언을 해주신 전력연구원 연관희 박사님께 감사드립니다.

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