한국지반신소재학회논문집 (Journal of the Korean Geosynthetics Society)

  • 제10권1호
  • /
  • Pages.19-28
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  • 2011
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  • 2508-2876(pISSN)
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  • 2287-9528(eISSN)
한국지반신소재학회 (Korean Geosynthetics Society)
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동결-융해 반복작용으로 인한 화강풍화토의 압축강도 특성 변화에 관한 연구

Effect of Cyclic Freezing-Thawing on Compressive Strength of Decomposed Granite Soils

  • 유충식 (성균관대학교 공과대학 사회환경시스템공학과) ;
  • 신부남 (성균관대학교 공과대학 사회환경시스템공학과)
  • 투고 : 2011.02.16
  • 심사 : 2011.03.21
  • 발행 : 2011.03.30
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초록

본 논문에서는 동결-융해 반복작용이 화강풍화토의 압축강도 특성에 미치는 영향에 관한 내용을 다루었다. 이를 위해 세립분 함유량을 변화시켜 다양한 시료조건을 조성한 후 동결-융해 시험 환경을 조성한 후 동결-융해 반복작용 사이클을 강제 부가하였다. 시료에 대한 평면변형률압축시험 및 미세입자구조의 변화를 가시적으로 확인할 수 있는 전자주사현미경(SEM) 촬영 및 분석을 수행하였다. 먼저, SEM 분석 결과 화강풍화토는 동결-융해 반복작용에 노출될 경우 입자들이 뭉쳐 간극이 증가하는 추세를 보였다. 한편, 압축강도 특성의 경우 세립분 함유량에 따라 다소 차이를 보이는 것으로 나타났는데 세립분 함유량이 적은 경우에는 강도저하 현상을, 세립분 함유량이 많은 경우에는 강도 증가 현상을 보임을 확인할 수 있었다.

This paper presents the results of an investigation into the effect of cyclic freezing-thawing on the compressive strength characteristics of decomposed granite soils. A plane strain compression (PSC) tests were performed on a series of test specimens with different freezing-thawing cycles and fine contents to investigate the change in compressive strength under the process of freezing-thawing cycles. Also performed were scanning electron microscope (SEM) tests to investigate the change in structural rearrangement from a micro-scale point of view. The test results showed that the soil particles tend to conglomerate when subject to cycles of freezing and thawing, and that the soil with less fines exhibited decreased shear strength due to the cyclic freezing-thawing while the soils with a larger fine content showed the opposite trend.

키워드

참고문헌

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피인용 문헌

  1. 지반침하로 인한 지하공동 복구재료의 현장적용성 평가 vol.21, pp.3, 2011, https://doi.org/10.14481/jkges.2020.21.3.5