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2025 Vol.41, Issue 6 Preview Page
Evaluation of Freezing Behavior of Artificial Ground Freezing System under Groundwater Flow Conditions and Determination of Critical Flow Velocity for Window Formation

지하수 흐름 조건에서의 인공동결시스템의 동결거동 평가 및 윈도우 발생에 대한 임계 유속 평가

Gyu-Hyun Go1*
,
Soo-Woong Yang2
,
Gi-Eun Ko2
,
Seok-Yoon Woo2
고 규현1*
,
양 수웅2
,
고 기은2
,
우 석윤2
1Member, Associate Prof., School of Architecture, Civil and Environmental Engineering, Kumoh National Institute of Tech.
2Undergraduate Student, School of Architecture, Civil and Environmental Engineering, Kumoh National Institute of Tech.
1정회원, 국립금오공과대학교 건축토목환경공학부 부교수
2비회원, 국립금오공과대학교 건축토목환경공학부 학사과정
*Corresponding Author
31 December 2025. pp. 99-105
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Abstract

Artificial ground freezing is a ground reinforcement technique widely used in urban underground excavation projects and has recently been applied more actively, particularly in developed countries. However, under groundwater flow conditions, heat transfer around freezing tubes is strongly influenced by seepage, which causes significant difficulties in practical application. In this study, an indoor soil freezing chamber system was developed to evaluate ground freezing behavior under controlled groundwater flow conditions. Using Python-based postprocessing, the frozen wall formation process within the ground, which is difficult to observe directly, was visualized from experimental data, and the development pattern of the frozen wall was identified. In addition, a series of experiments was conducted to determine the range of critical groundwater flow velocity that leads to the formation of “windows” around the frozen wall.

Keywords
Artificial ground freezing
Critical flow velocity
Groundwater flow
Indoor soil freezing system
Window

인공동결공법은 도심지 지하 굴착 시 활용되는 연약지반 보강기법으로서 선진국을 중심으로 최근 들어 활발히 적용되고 있다. 하지만 빠른 지하수 침투 환경을 가진 지반 조건에서는 동결관 주변의 열전달이 지하수 유동에 의해 영향을 받으면서 공법 적용에 많은 어려움이 초래된다. 본 연구에서는 빠른 지하수 흐름 조건에서의 지반 동결 거동을 평가하기 위해 실내 모형토조시스템을 자체 개발하였고, 다양한 지하수 유속 별 지반 동결 실험을 수행하였다. 토조실험을 통해 얻어진 데이터를 Python 기반의 후처리 기법을 통해 육안 관찰이 어려운 지반 내부의 동결 벽체 형성 과정을 시각화하고, 동결벽체의 양상을 확인하였다. 또한, 동결 벽체 주변 윈도우 발생을 유발하는 임계 지하수 유속의 범위를 제시하였다.

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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 :6
  • Pages :99-105
  • Received Date : 2025-10-28
  • Revised Date : 2025-11-19
  • Accepted Date : 2025-11-19
  • DOI :https://doi.org/10.7843/kgs.2025.41.6.99
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