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Effect of Temperature on Particle Structure and Strength Characteristic of Sand and Weathered Granite Soil

온도변화가 모래 및 화강풍화토의 입자구조 및 강도 특성에 미치는 영향

Chung-Sik Yoo1
,
Seung-Min Shin2*
유 충식1
,
신 승민2*
1Professor, School of Civil and Environmental Engineering, Sungkyunkwan Univ. Natural Sciences Campus
2the master´s course, School of Civil and Environmental Engineering, Sungkyunkwan Univ. Natural Sciences Campus
*교신저자. *Corresponding Author. 
30 June 2015. pp. 57-70
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Abstract

This paper presents the results of an investigation into the effect of forced temperature change cycles on physical and mechanical properties of sand and weathered granite soil. The effect of forced temperature change cylecs on the particle arrangement and the thermal conductivity was first investigated. A series of triaxial compression tests on the soils were also performed to look into the effect of temperature change cycles on the stress-strain-strength behavior. The results indicated that the forced temperature change cycle does not significantly affect the particle arrangement and thermal conductivity. It is shown however that the heating duration showed some effect on the deviatoric stress at failure while no significant effect due to the number of heating-cooling cycle was observed.

Keywords
Thermally active geotechnical structure
Heating-cooling
Stress-strain-strength beahvior
Undrained condition

본 논문에서는 지열활용 지반구조물 적용시 주변 지반에 부과되는 온도변화 사이클이 흙의 물리적･역학적 특성에 미치는 영향에 대한 내용을 다루었다. 이를 위해 모래와 화강풍화토를 대상으로 다양한 온도변화 조건을 구현하고 이에 따른 흙의 입자구조 및 열전도특성 변화 경향을 고찰하였다. 아울러 다양한 온도변화에 노출된 시료를 이용하여 시편을 조성한 후 삼축압축시험을 수행하고 그 결과를 토대로 온도변화가 시편의 응력-변형률-강도 톡성에 미치는 영향을 검토하였다. 그 결과 온도변화 사이클은 흙의 입자구조 및 열전도율에 큰 영향을 미치지 않는 것으로 검토되었다. 또한 임의 반복 사이클 에 있어 가열시간이 변화함에 따라 최대 축차응력이 15%이상 감소하는 것으로 나타나 가열-냉각 반복작용에 의한 흙의 강도특성 변화는 흙의 종류에 따라 달라 질수 있는 것으로 검토되었다.

References
1
1.Abuel-Naga, H.M., Bergado, D.T., Bouazza, A. and Ramana. G.V. (2006), “Thermally induced volume change and excess pore water pressure of soft Bangkok clay”, Engineering Geology, Vol.89, Issues 1-2.
2
2.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, Vol. 44(8):942-956.
3
3.Brandl, H. (2006), “Energy Foundations and other Thermo- Active Ground Structures”, Geotechnique, Vol.56(2): 81-122.
4
4.Cekerevac, C. and Laloui, L. (2004), “Experimental Study of Thermal Effects on the Mechanical Behaviour of a Clay”, International Journal for Numerical and Analytical Methods in Geomechanics, Vol.28, No.3, pp.209-228.
5
5.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 Geo-technical Society, Vol.24, No.1, pp.37-49.
6
6.Laloui, L., Moreni, M. and Vulliet, L. (2003), “Comportement d'un Pieu Bi-Fonction, Fondation et ´Echangeur de Chaleur”, Canadian Geotechnical Journal, Vol.40, No.2, pp.388-402.
7
7.Laloui, L., Nuth, M. and Vulliet, L. (2006), “Experimental and numerical investigations of the behavior of a heat exchange pile”, International Journal for Numerical and Analytical Methods in Geomechanics. 30:763-781.
8
8.McCartney, J.S., HaHaise, D., LaHaise, T. and Rosenberg, J. (2010). “Application of Geoexchange Experience to Geothermal Foundations”, GeoFlorida, 2010.
9
9.Ooka, R., Sekine, K., Mutsumi, Y., Yoshiro, S. and SuckHo, H. (2007), “Development of a Ground Source Heat Pump System with Ground heat Exchanger Utilizing the Cast-in Place Concrete Pile Foundations of a Building”, EcoStock 2007, pp.8.
10
10.Park, D.H., Kim, K.G., K, D.Y., Jang, J.H. and Park, S.S. (2010), “Numerical Simulation of Standing Column Well Ground Heat Pump System Part 1: Validation of the Numerical Model”, Journal of Korean Geotechnical Society, Vol.26, No. 2, pp.33-43.
11
11.Yoon, S., Lee, S.R., Park, H. and Park, S. (2012), “Thermal Conductivity Estimation of Soils Using Coil Shaped Ground Heat Exchanger”, Journal of The Korean Society of Civil Engineers, 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 : 14
  • No :2
  • Pages :57-70
  • Received Date : 2015-04-17
  • Revised Date : 2015-06-23
  • Accepted Date : 2015-06-24
  • DOI :https://doi.org/10.12814/jkgss.2015.14.2.057
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