Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Regional Assessment of Seismic Site Effects and Induced Vulnerable Area in Gyeonggi-do, South Korea, Using GIS

GIS 기반 경기도 광역영역의 부지지진응답 특성 및 연계 지진 취약지역 분석

  • Kim, Han-Saem (Earthquake Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Sun, Chang-Guk (Geological Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Cho, Hyung-Ik (Earthquake Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Nam, Jee-Hyun (Office of Urban Planning & Housing Policy Research, Gyeonggi Research Institute)
  • 김한샘 (한국지질자원연구원 지진연구센터) ;
  • 선창국 (한국지질자원연구원 국토지질연구본부) ;
  • 조형익 (한국지질자원연구원 지진연구센터) ;
  • 남지현 (경기연구원 공간도시연구실)
  • Received : 2018.01.23
  • Accepted : 2018.03.11
  • Published : 2018.05.31
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Abstract

The necessity of predicting the spatial information of the site-specific seismic response, which is essential information for the comprehensive earthquake disaster countermeasures, is increasing for the mid-west urban areas where the earthquake-induced damages can be increased due to frequent occurrence of mid-scale earthquake such as 2016 Gyeongju Earthquake and 2017 Pohang Earthquake. Especially, researches on strategic securing of site survey datasets and understanding the site-specific site response characteristics were conducted for Gyeonggi-do, South Korea. In this study, a GIS-based framework for site-specific assessment of site response and induced vulnerable area in Gyeonggi-do, South Korea was proposed. Geo-Data based on GIS platform was constructed for regional estimation of geotechnical characteristics by collecting borehole and land coverage datasets. And the geo-spatial grid information was developed for deriving spatial distribution of geotechnical layer and site response parameters based on the optimization of the geostatistical interpolation method. Accordingly, base information for Improving earthquake preparedness measures was derived as seismic zonation map with administrative sub-units considering the quantitative site effect of Gyeonggi-do.

최근 경주지진과 포항지진과 같이 중규모 이상 지진이 빈번이 발생함에 따라 피해기능성이 커질 수 있는 중서부 도시 지역들에 대한 종합적 지진재해 대책 수립의 필수기본 정보인 지역적 부지고유 지진응답 공간정보 예측의 필요성이 증대되고 있다. 특히 경기도 지역을 대상으로 정량적 부지고유 지반응답 특성 파악의 필요성이 증대됨에 따라 대상 확장영역 내 전략적 지반조사 자료의 확보 및 연계적 부지특성 파악 연구가 다각도로 진행되고 있다. 이에 본 연구에서는 경기도 지진취약지역 도출 및 부지고유 지진응답특성 분석을 위한 위사결정 프레임웍을 제시하였다. 시추조사 자료 및 수치표고모델 등의 지표피복 자료를 수집함으로써 지반지진공학적 연계활용을 위한 GIS 플랫폼 기반의 Geo-Data를 구축하였다. 지구통계학적 공간보간 기법의 최적화 설계를 통해 지층분포 특성 및 연계 취약도 성분 도출을 위한 지반 공간그리드를 구축하였으며, 이를 통해 지진지반응답 매개변수의 공간구역화를 수행하였다. 이에 따라 경기도 지역의 정량적 부지효과를 고려한 경기도 맞춤형 지진방재대책 수립을 위한 기저 정보로서 활용하였다.

Keywords

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