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2025 Vol.41, Issue 3 Preview Page
Assessment of Ground Subsidence along Daesin Road in the Sangpyeong Industrial Complex Using Gravity Field Interpretation and 3-D Density Modeling

중력장 해석과 3-D 밀도 모델링을 통한 상평산단 대신로의 지반침하 진단

Sungchan Choi1
,
Sung-Wook Kim2*
,
Dae-Hong Go3
,
Yeong-Jae Lee4
,
Sung-Min Bae5
,
Gichun Kang6
최 승찬1
,
김 성욱2*
,
고 대홍3
,
이 영재4
,
배 성민5
,
강 기천6
1Chief Researcher, Geo-information Research Lab Co. Ltd.
2Member, CEO, Geo-information Research Lab Co. Ltd.
3Senior Researcher, Geo-information Research Lab Co. Ltd.
4Researcher, Geo-information Research Lab Co. Ltd.
5General Manager, DL Construction
6Member, Prof., Dept. of Civil Engineering, Gyeongsang National Univ.
1비회원, ㈜지아이 지반정보연구소 책임연구원
2정회원, ㈜지아이 지반정보연구소 대표
3비회원, ㈜지아이 지반정보연구소 선임연구원
4비회원, ㈜지아이 지반정보연구소 연구원
5비회원, 디엘건설 부장
6정회원, 경상국립대학교 토목공학과 교수
*Corresponding Author
30 June 2025. pp. 35-45
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Abstract

This study investigates the causes of recurrent ground subsidence along Daesin Road in the Sangpyeong Industrial Complex, Jinju, Korea, using gravity field interpretation and three-dimensional (3D) density modeling. The area, a former floodplain, is geologically vulnerable owing to loosely consolidated clayey sediments and heterogeneous stratification, which, combined with rainfall and groundwater fluctuations, increase subsidence risk. Ground irregularities, attenuated ground-penetrating radar signals, and isolated low-gravity anomalies reveal low-density zones (LDZs) beneath the surface. Notably, the LDZs identified through 3D modeling align with the location of buried abandoned pipelines, indicating a man-made influence on subsidence. Integrating geological, hydrogeological, and geophysical datasets enhances understanding of urban subsidence mechanisms. The proposed methodology offers an effective framework for hazard assessment and early warning systems in geologically vulnerable urban areas.

Keywords
Density modeling
Gravity field interpretation
Low-density zone
Subsidence

이 연구는 경상남도 진주시 상평산단 대신로에서 반복적으로 발생한 지반침하의 원인과 지하 구조를 분석하기 위해 중력장 해석과 3차원 밀도 모델링을 중심으로 수행되었다. 상평산단 지역은 과거 하천 매립지로 지질학적 취약성과 미고결 점성토의 불균질한 분포 특성을 보이며, 강우 및 지하수위 변동과 결합되어 침하 위험이 증가하는 것으로 나타났다. 지표면의 불규칙한 기복, GPR 탐사에서의 반사 신호 감쇠, 그리고 중력장 해석에서 나타난 고립된 저중력이상대는 하부 지반 내 저밀도층의 존재를 시사한다. 특히, 3차원 밀도 모델링 결과, 저밀도층은 폐관로 하부와 밀접하게 지반침하의 인위적 기여 가능성을 높인다. 연구에 이용한 지질·수문·지구물리자료의 통합 해석으로 도시형 지반침하의 메커니즘을 규명하며, 향후 침하 예측 및 사전 경보체계 구축을 위한 실효성 있는 분석방법을 제시한다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 41
  • No :3
  • Pages :35-45
  • Received Date : 2025-05-07
  • Revised Date : 2025-06-05
  • Accepted Date : 2025-06-05
  • DOI :https://doi.org/10.7843/kgs.2025.41.3.35
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