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2025 Vol.41, Issue 5 Preview Page
Evaluation of Ground Behavior Behind Retaining Walls During Excavation Using Centrifuge Model Tests

원심모형실험을 활용한 지하굴착시 배면지반 거동평가

Jae-Hyun Kim1
,
Jong-Jeon Park2
,
Jun-Young Ko3
,
Ji-Seung Lee4
,
Cheol-Ju Lee5
,
Joon-Shik Moon6*
김 재현1
,
박 종전2
,
고 준영3
,
이 지승4
,
이 철주5
,
문 준식6*
1Member, Associate Prof., Dept. of Civil Eng., Kangwon National Univ.
2Member, Branch Office President, Ilshin Geological Engineering
3Member, Associate Prof., Dept. of Civil Eng., Chungnam National Univ.
4Senior Researcher, Korea Authority of Land & Infrastructure Safety
5Member, Prof., Dept. of Civil Eng., Kangwon National Univ.
6Member, Prof., Dept. of Civil Eng., Kyungpook National Univ.
1정회원, 강원대학교 토목공학과 부교수
2정회원, 일신지질 서울지사 지사장, 공학박사
3정회원. 충남대학교 토목공학과 부교수, 공학박사
4비회원, 국토안전관리원 선임연구원
5정회원, 강원대학교 토목공학과 교수
6정회원, 경북대학교 토목공학과 교수
*Corresponding Author
31 October 2025. pp. 83-97
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Abstract

As the demand for underground space development increases, excavation activities in urban areas are increasing rapidly. Consequently, the settlement and deformation of the retained ground during excavation have become critical geotechnical concerns. The influence zone that causes deformation in the retained ground is typically estimated using theoretical or empirical methods. However, these zones can vary significantly based on site-specific soil conditions and supporting structures, indicating the need for a quantitative analysis. This study conducted centrifuge model tests to evaluate the behavior of the retained ground during excavation. A staged excavation simulation system was developed to replicate excavation sequences within the centrifuge, and a series of tests were performed. The results quantified the influence zones for various ground conditions (sand, weathered rock) and support types (anchor, strut). The results revealed discrepancies between theoretical and empirical estimation methods for the influence zone under certain conditions. The study’s findings can be effectively applied in estimating excavation-induced influence zones.

Keywords
Centrifuge
Excavation
Ground stability
Influence area
Retaining wall

지하공간 개발의 수요 증가로 인해 지하 굴착공사가 활발히 이루어지면서 굴착 중에 발생하는 배면지반의 침하 및 변형이 주요한 공학적 문제로 대두되고 있다. 지반 굴착시 배면지반에 변형을 유발하는 영향범위는 일반적으로 이론 및 경험적 추정방법에 의존하고 있으나, 현장지반과 지지구조체 조건에 따라 영향범위가 다양하게 나타나고 있어 이에 대한 정량적 분석이 필요하다. 본 연구에서는 굴착시 배면지반의 거동을 평가하기 위해 원심모형실험을 수행하였다. 이를 위해 원심모형실험 중 단계굴착 모사가 가능한 실험시스템을 구축하고, 굴착과정에서 발생하는 지반거동을 실험적으로 평가하였다. 또한, 지반조건(모래, 풍화암)과 지지구조체 형식(앵커, 버팀보)에 따른 배면지반 영향범위를 산정하였다. 실험 결과, 영향범위에 대한 이론 및 경험적 추정방법과 실험결과가 특정 조건에서 차이를 보이는 것으로 확인되었다. 본 연구결과는 굴착시 영향범위를 추정하고 지하안전법에 따른 계측계획 수립시 유용하게 활용될 수 있을 것으로 판단된다.

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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 :5
  • Pages :83-97
  • Received Date : 2025-08-07
  • Revised Date : 2025-10-02
  • Accepted Date : 2025-10-07
  • DOI :https://doi.org/10.7843/kgs.2025.41.5.83
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