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2013 Vol.12, Issue 3 Preview Page
Analysis of the Relationship between Unconfined Compression Strength and Shear Strength of Frozen Soils

동결토의 일축압축강도와 전단강도 상관관계 분석에 관한 연구

Jae-Mo Kang1
,
Jang-Guen Lee2*
,
Joonyong Lee3
,
YoungSeok Kim4
강 재모1
,
이 장근2*
,
이 준용3
,
김 영석4
1Researcher, Geotechnical Engineering Research Division, Korea Institute of Construction Technology
2Senior Researcher, Geotechnical Engineering Research Division, Korea Institute of Construction Technology,
3Researcher, Geotechnical Engineering Research Division, Korea Institute of Construction Technology
4Research Fellow, Geotechnical Engineering Research Division, Korea Institute of Construction Technology
*교신저자. *Corresponding Author. 
30 September 2013. pp. 23-29
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Abstract

The mechanical behavior of frozen soils is different from that of unfrozen soils due to the phase change between water and ice. The strength characteristics of frozen soils are governed by the intrinsic material properties such as grain size, ice and water content, air bubbles, and by externally imposed testing conditions such as temperature, freezing time, and strain rate. Especially, the strength of the frozen soils is generally higher than that of unfrozen soils due to ice binding capacity with soil particles, and is strongly affected by a highly complex interaction between the solid soil skeleton and the pore matrix, composed of ice and unfrozen water. In this study, the direct shear test and unconfined compression test are carried out inside of a large-scaled freezing chamber, and the relationships between cohesion and unconfined compression strength under various freezing temperature conditions are discussed.

Keywords
Frozen ground
Unconfined compressive strength
Shear strength
Cohesion

동결토는 물과 얼음의 상변화에 따라 일반적인 흙과는 다른 거동을 보이며, 동결토의 강도는 온도, 함수비, 시간, 토질 특성 등 다양한 인자에 의해 영향을 받는다. 특히 지반이 동결되는 경우, 얼음과 흙 입자의 결합력에 의해 높은 강도 특성을 보이며, 이때의 전단강도는 흙의 구조적 결합에 영향을 미치는 얼음과 세립분의 함량에 따라 달라지며, 이로 인해 점착력이 동결토의 전단강도에 미치는 영향은 증가한다. 본 논문에서는 동결조건에서 직접전단시험과 일축압축강도시험을 실시하여 온도에 따른 흙의 강도 특성을 확인하였으며, 점착력과 일축압축강도와의 상관관계를 확인하였다.

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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 : 12
  • No :3
  • Pages :23-29
  • Received Date : 2013-08-06
  • Revised Date : 2013-09-11
  • Accepted Date : 2013-09-16
  • DOI :https://doi.org/10.12814/jkgss.2013.12.3.023
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