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2021 Vol.37, Issue 10 Preview Page
Frost Heave of Frost Susceptible Soil According to Performance of Thermo-syphon

열 사이펀 성능에 따른 동상민감성 지반의 거동 비교

Dong-Su Park1
,
Mun-Beom Shin2
,
Young-Kyo Seo3*
박 동수1
,
신 문범2
,
서 영교3*
1Member, Graduate Student, Dept. of Convergence Study on the Ocean Science and Technology, Korea Maritime and Ocean Univ.
2Member, Graduate Student, Dept. of Convergence Study on the Ocean Science and Technology, Korea Maritime and Ocean Univ.
3Member, Prof., Dept. of Ocean Engrg., Korea Maritime and Ocean Univ. & Adjunct Prof., Dept. of Convergence Study on the Ocean Science and Technology, Korea Maritime and Ocean Univ.
1정회원, 한국해양대학교 해양과학기술융합학과 박사과정
2정회원, 한국해양대학교 해양과학기술융합학과 박사과정
3정회원, 한국해양대학교 해양공학과 교수 및 해양과학기술융합학과 겸임교수
*Corresponding Author
31 October 2021. pp. 27-40
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Abstract

The construction method to prevent the frost heave or thaw settlement is called the ground stabilization method, and the thermo-syphon is one of the typical ground stabilization methods. The thermo-syphon has recently been developed with a simple analysis model and thermal analysis has been carried out, but the frost heave of frost susceptible soil was not considered. This study was conducted using ABAQUS internal user subroutine to develop the numerical analysis model (Coupled thermo-mechanical) that can simultaneously perform thermal analysis for the temperature change of the soil according to the thermo-syphon and structural analysis to predict the frost heave of the soil accordingly. As a result of the numerical analysis, the frost heave of the soil decreased as the performance of the thermo-syphon increased. As for the main results, when the thermo-syphon which has contain 25%, 50%, and 100% of refrigerant filling ratio was applied, the reduction ratio of the frost heave was 5.5%, 14.4%, and 21% respectively.

Keywords
Coupled thermo-mechanical model
Frost heave
Frost susceptible soil
Porosity rate function
Thermo-syphon

동상민감성 지반의 융기 및 침하 방지를 위한 공법을 지반 안정화 공법이라고 하며 열 사이펀은 대표적인 지반 안정화 공법 중 하나이다. 열 사이펀은 최근 간편한 해석모델 개발과 더불어 열 해석이 진행되었지만, 이에 따른 동상민감성 지반의 열적 거동을 고려하지 않았다. 따라서 본 연구는 열 사이펀의 성능에 따른 지반의 온도 변화를 위한 열 해석과 이에 따른 지반의 거동을 예측하기 위한 구조해석을 동시에 수행하기 위해 ABAQUS 내부 사용자 서브루틴을 사용하여 열 사이펀을 적용한 TM(Thermo-Mechanical) 모델을 개발하여 열 사이펀의 성능에 따른 지반 융기 억제성능을 확인하였다. 해석결과 열 사이펀의 성능 증가에 따라 지반의 최종 융기가 감소하였으며 냉매 충전율 25%, 50% 그리고 100%의 열 사이펀 적용 시 각각 5.5%, 14.4%, 21% 융기 억제성능을 나타내었다.

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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 : 37
  • No :10
  • Pages :27-40
  • Received Date : 2021-08-30
  • Revised Date : 2021-09-30
  • Accepted Date : 2021-10-15
  • DOI :https://doi.org/10.7843/kgs.2021.37.10.27
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