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Evaluation Method of Frost Heave for Unsaturated Soils

불포화 지반의 동결 팽창율 예측을 위한 기법 연구

Jae-Mo Kang1
,
YoungSeok Kim2*
,
Jangguen Lee3
강 재모1
,
김 영석2*
,
이 장근3
1Researcher, Geotechnical Engineering Research Division, SOC Research Institute, Korea Institute of Construction Technology
2 Research Fellow, Geotechnical Engineering Research Division, SOC Research Institute, Korea Institute of Construction Technology
3Researcher, Geotechnical Engineering Research Division, SOC Research Institute, Korea Institute of Construction Technology
*교신저자. *Corresponding Author. 
30 March 2013. pp. 93-100
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Abstract

Frost heave occurs when ground temperature decreases under 0℃ and soil volume expands, which causes roadway and buried pipe line failure due to differential heaving. There are several models to predict volumetric strain caused by frost heave, but they requires expertises who have professional background and experience related to numerical analysis. This study presents an evaluation method to predict volumetric strain caused by frost heave with fundamental physical properties of soils. The evaluation method is assessed with experimental results.

Keywords
Frost heave
Prediction
Volumetric strain
Evaluation method
Unsaturated soil

동결 지반에서 발생하는 동상(frost heave)은 지반의 부등융기를 야기하고, 이때 발생하는 동결하중에 의해 동절기 도로 및 기초 구조물에 피해를 가져온다. 이러한 동결 피해를 방지하기 위해 동상 예측이 필요하다. 대부분의 동상 예측 방법은 경험과 지식을 갖춘 전문가의 수치해석에 의존하고 있어 현장에서 활용성이 낮다. 본 논문에서는 동결지반 피해의 주요 원인인 지반의 동상량을 예측하기 위해 기본적인 지반 물성 데이터를 이용해 동상량을 계산할 수 있는 방안을 제시하였으며, 실내 동상 실험결과와의 비교 분석을 통해 제안된 계산식의 신뢰성을 검토하였다.

References
1
1.Kang, J. M., Hong, S. S., and Kim, Y. S. (2009), “A Study on Frost Heave Susceptibility of Soil Mixed with Waste Glass”, JSSI&JSSE Joint Conference, Sapporo, pp.74.
2
2.Kang, J. M., Kim, H. S., Kim, Y. S., Lee, J. G., and Hong, S. S. (2010), “Mechanical Behavior of Buried Pipe Line with Frost Prevention Materials”, KGS Fall National Conference, pp. 546-552. (in Korean)
3
3.Kim, K. J., Kim, Y. S., and Hong, S. S (2012), “Physical and Mechanical Characteristics so the Antarctic Rocks Exposed to the Extreme Environment”, Korean Society of Civil Engin-eering, Vol.32, No.6C, pp. 275-284. (in Korean)
4
4.Freitag D. R. and Mcfadden T. T. (1997), Introduction to cold region engineering, ASCE, p.141.
5
5.Gandahl, R. (1985), “Polystyrene Foam as a Frost Protection Measure on National Roads in Sweden”, Transportation Research Record, 1146, pp.1-9.
6
6.Johnston, G. H. (1981), Permafrost Engineering Design and Construction, Toronto, Wiley
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7.Sellmann, P. V. (1989), “Strength of soils and rocks at low temperatures”, Cold Regions Science and Technology, 17, pp.189-190.
8
8.Smith, M., and Tice. A. (1988), “Measurement of unfrozen water content of soils”, In Proc. 5th Int. Conf. on permafrost, Trondheim, Vol.1, pp.473-477.
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 12
  • No :1
  • Pages :93-100
  • Received Date : 2013-03-12
  • Revised Date : 2013-03-25
  • Accepted Date : 2013-03-25
  • DOI :https://doi.org/10.12814/jkgss.2013.12.1.093
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