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2017 Vol.16, Issue 2 Preview Page
Heat Exchange Drainage Method Induced Bearing Capacity Characteristicr

열유도 배수공법이 적용된 지반의 하중지지 특성

Seung-min Shin1
,
Chun-won Sin2
,
Chung-Sik Yoo3*
신 승민1
,
신 춘원2
,
유 충식3*
1Member, the master´s course, School of Civil and Environmental Engineering, Sungkyunkwan Univ
2Member, the master´s course, School of Civil and Environmental Engineering, Sungkyunkwan Univ.
3Member, Professor, School of Civil and Environmental Engineering, Sungkyunkwan Univ.
*교신저자. *Corresponding Author. 
30 June 2017. pp. 149-164
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Abstract

This paper presents the results of an investigation into the thermo-hydromechanical response of weathered granite soil. The effect of forced change temperature and relative humidity at the soil layer boundaries were monitored during heating. A series of load settlement test were performed on layers of compacted, unsatureated weathered granite soil with geosynthetic embedded at mid height before and after application of heat exchanger to the base of the soil layers. The results from this study indicated the potential for using embedded heat exchangers for the mechanical improvement of geotechnical systems incorporating weathered granite soil.

Keywords
Thermo-hydromechanical
Heat exchangers
Weathered granite soil
Geosynthetic

본 논문에서는 화강풍화토 조건에서 온도변화에 따른 지반의 하중지지 특성의 변화를 관찰하기 위해 실험을 진행하였다. 지반의 온도변화의 시간의 흐름에 의한 각 지층의 온도 및 체적함수율(V.W.C)를 지속하여 측정하여 온도변화가 보강토에 미치는 영향을 확인하였다. 또한 온도상승 후 지반에 수직으로 Loading-Unloading 작용을 통해 열에 의한 지반의 열-수리-역학 적 관점에서의 하중지지력을 검토하였으며 비보강 지반과 실제 보강토 옹벽에서처럼 보강재와 배수층을 설치한 지반내 온도 작용에 의한 배수작용과 보강재의 영향에 관하여 분석하였다. 그 결과 열교환 장치를 설치한 경우 수직하중의 강도가 더 크게 나타나 지반의 강도가 증가한 것으로 나타났다.

References
1
Abuel-Naga, H. M., Bergado, D. T., Bouazza, A., and Ramana. G.V. (2007), “Volume change behaviour of saturated clays under drained heating conditions: experimental results and constitutive modeling”, Canadian Geotechnical Journal, 2007.
2
Choi, H. S., Lee, C. H., Choi, H. P., and Woo, S. B. (2008), “A study on the physical characteristics of grout material for backfilling ground heat exchanger”, Journal of Korean Geotechnical Society, Vol.24, No.1, pp.37-49.
3
Coccia, C. J. R. and John, S. McCartney, J. (2013), “Impact of Heat Exchange on the Thermo-Hydro-Mechanical Response of Reinforced Embankments”, Geo-Congress 2013, ASCE 2013, pp.343-352.
4
McCartney, J. S., HaHaise, D., LaHaise, T., and Rosenberg, J. (2010). “Application of Geoexchange Experience to Geothermal Foundations”, GeoFlorida, 2010.
5
Yoon, S., Lee, S. R., Park, H., and Park, S. (2012), “Thermal Conductivity Estimation of Soils Using Coil Shaped Ground Heat Exchanger”, Journal of Korean Civil Engineering Society, Vol.32, No.5C, pp.177-183.
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 16
  • No :2
  • Pages :149-164
  • Received Date : 2017-01-12
  • Revised Date : 2017-06-21
  • Accepted Date : 2017-06-22
  • DOI :https://doi.org/10.12814/jkgss.2017.16.2.159
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