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2022 Vol.21, Issue 4 Preview Page

Research Article

Experimental Study for Thermal Characteristics of Frozen Soil Samples

동토 시료의 열적 특성 분석을 위한 실험적 연구

Sewon Kim1
,
Sangyeong Park2
,
Jongmuk Won3
,
YoungSeok Kim4*
김 세원1
,
박 상영2
,
원 종묵3
,
김 영석4*
1Member, Researcher, Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Gyeonggi-Do 10223, Republic of Korea
2Non-Member, PhD Student, School of Civil, Environmental and Architectural Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul 02841, Republic of Korea
3Non-Member, Assistant Prof., Dept. of Civil and Environmental Engineering, University of Ulsan, 93 Daehak-Ro, Nam-Gu, Ulsan 44610, Republic of Korea
4Member, Senior Research Fellow, Northern Infrastructure Specialized Team, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Gyeonggi-Do 10223, Republic of Korea
*Corresponding Author
30 December 2022. pp. 31-40
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Abstract

Recently, the Arctic resource development project, where undeveloped energy resources (oil, natural gas, etc.) are deposited, is actively being promoted for the perspective of diversifying the construction market and developing future energy resources. However, the frozen ground always has problems such as sinking and frost-heaving due to extreme weather. Therefore, it is necessary to analyze the thermal characteristics of the frozen soil to secure the stability of the ground structure. In this study, a series of laboratory tests were performed to evaluated the thermal characteristics of frozen soil samples in the oil sand field in Alberta, Canada. In additon, it was compared with the results of domestic(Gangwond-do) sample performed under the same conditions. As a comparison results of the experiments, it was clarified that the different frozen water content and thermal conductivity characteristics by temperature after completion of freezing could affect the frozen soil behavior.

Keywords
Arctic-circle
Frozen soil
Laboratory test
Unfrozen water content
Thermal conductivity

최근 건설시장의 다각화와 미래 에너지 자원개발이라는 관점에서 미개발된 에너지 자원(석유, 천연가스 등)이 대량으로 매장되어 있는 극한지(북극권) 개발 사업이 활발히 추진되고 있다. 이러한 지역에서는 극한의 기후로 인한 동토 지반의 침하나 동상 등의 문제가 항상 발생하기 때문에 지반 구조물의 안정성 확보를 위해 열적 특성 분석이 반드시 필요하다. 본 논문에서는 동토 지역에서 지반동결과 관련된 문제들을 평가하고 기술적으로 해결하기 위한 기초 자료 제공을 목적으로, 캐나다 앨버타주 오일샌드 매장 지역의 동토 시료에 대한 열적 특성을 국내 시료와 비교·분석하였다. 일련의 실내 실험을 통해 동결온도에 대한 시간에 따른 부동 수분량을 측정하여 흙의 종류와 동결온도가 부동 수분량에 미치는 영향에 대하여 고찰하였고, 토양의 잠열, 열용량 및 열전도도를 정확하게 파악하기 위하여 동결/비동결 조건에 대한 열전도도 실내 실험을 수행하였다. 실험 결과, 동결 완료 후 온도별로 상이한 부동 수분량과 열전도도 특성은 동토 지역 동결온도가 동토의 역학 거동에 영향을 끼칠 수 있음을 규명하였다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 21
  • No :4
  • Pages :31-40
  • Received Date : 2022-11-29
  • Revised Date : 2022-12-09
  • Accepted Date : 2022-12-14
  • DOI :https://doi.org/10.12814/jkgss.2022.21.4.031
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