Geomechanics and Engineering

  • 제29권3호
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  • Pages.281-290
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  • 2022
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Experimental study for application of the punch shear test to estimate adfreezing strength of frozen soil-structure interface

  • Park, Sangyeong (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Hwang, Chaemin (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Choi, Hangseok (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Son, Youngjin (Eco Infra Solution Team, SK ecoplant) ;
  • Ko, Tae Young (Department of Energy and Resources Engineering, Kangwon National University)
  • 투고 : 2022.01.20
  • 심사 : 2022.03.10
  • 발행 : 2022.05.10
⟨ 이전 논문 다음 논문 ⟩

초록

The direct shear test is commonly used to evaluate the shear behavior of frozen soil-structure interfaces under normal stress. However, failure criteria, such as the Mohr-Coulomb failure criterion, are needed to obtain the unconfined shear strength. Hence, the punch shear test, which is usually used to estimate the shear strength of rocks without confinement, was examined in this study to directly determine the adfreezing strength. It is measured as the shear strength of the frozen soil-structure interface under unconfined conditions. Different soils of silica sand, field sand, and field clay were prepared inside the steel and concrete ring structures. Soil and ring structures were frozen at the target temperature for more than 24 h. A punch shear test was then conducted. The test results show that the adfreezing strength increased with a decrease in the target temperature and increase in the initial water content, owing to the increase in ice content. The adfreezing strength of field clay was the smallest when compared with the other soil specimens because of the large amount of unfrozen water content. The field sand with the larger normalized roughness showed greater adfreezing strength than the silica sand with a lower normalized roughness. From the experiment and analysis, the applicability of the punch shear test was examined to measure the adfreezing strength of the frozen soil-structure interface. To find a proper sample dimension, supplementary experiments or numerical analysis will be needed in further research.

키워드

과제정보

This research was supported by the National Research Foundation of Korea (NRF) grants funded by the Korea government (2019R1A2C2086647 and 2020R1A6A1A03045059).

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