Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Measurement and Verification of Unfrozen Water Retention Curve of Frozen Sandy Soil Based on Pore Water Salinity

간극수 염분농도에 따른 동결 사질토의 부동수분곡선 산정 및 검증 연구

  • Kim, Hee-Won (Dept. of Civil Engrg., Kumoh National Institute of Technology) ;
  • Go, Gyu-Hyun (Dept. of Civil Engrg., Kumoh National Institute of Technology)
  • 김희원 (금오공과대학교 토목공학과) ;
  • 고규현 (금오공과대학교 토목공학과)
  • Received : 2023.10.18
  • Accepted : 2023.10.31
  • Published : 2023.11.30
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Abstract

The characteristics of unfrozen water content in frozen soils significantly impact the thermal, hydraulic, and mechanical behavior of the ground. A thorough analysis of the unfrozen water content characteristics of the target subsoil material is crucial for evaluating the stability of frozen ground. This study conducted indoor experiments to measure the freezing point and unfrozen water content of sandy soil while considering pore water salinity. Utilizing the experimental data, we introduced a novel empirical model to conveniently estimate the unfrozen water retention curve. Furthermore, the validity of the unfrozen water retention curve was assessed by comparing the experimental data with the results of a simulation model that utilized the proposed empirical model as input data.

동결토의 부동수분특성은 지반의 열-수리-역학적 거동 전반에 걸쳐 지배적인 영향을 미치며, 동결 지반의 안정성 평가를 위해서는 대상 지반재료의 부동수분특성에 대한 면밀한 검토가 필요하다. 본 연구에서는 간극수 염분농도를 고려한 동결 사질토의 부동수분곡선을 평가하기 위하여 흙의 어는점 및 부동수분을 측정하는 실내 실험을 수행하였으며, 계측된 실험데이터를 기반으로 부동수분포화도 곡선을 간편하게 추정할 수 있는 경험적 모델을 새롭게 제시하였다. 또한, 제안된 경험적 모델을 입력자료로 적용한 해석모델의 시뮬레이션 결과를 실험데이터와 비교함으로써 사용된 부동수분곡선의 적정성을 검증하였다.

Keywords

Acknowledgement

이 연구는 금오공과대학교 대학 연구과제비로 지원되었음(2022-2023).

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