• Land and Housing Review
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• v.6 no.1
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• pp.31-39
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• 2015

Most landscape areas in apartment complex have been changing. Increasing the area of underground parking lots have an effect on apartment's circumstance. Natural ground was decreased so that the most space in apartment complex were converted into an artificial ground. To suggest the soil quality management, this study examined the actual situation about the soil quality of planting ground such as the quality standard as artificial soil, the difference of natural ground, and the difference of soil quality according to the work classification. As a result, the soil quality of the apartment complex with a large underground parking lot had low quality of soil. Soil physical properties were relatively fine but soil chemical properties needed the quality control. The soil quality of natural ground and artificial ground was not statistically significant and the soil quality by the work classification also had no statistical significance. Therefore, we established improvements about standards of the chemical properties for quality management, the soil quality in the natural ground and applying the equivalent standard according to the work classification.

• Geotechnical Engineering
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• v.38 no.2
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• pp.30-36
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• 2022

• Journal of the Korean Geotechnical Society
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• v.16 no.2
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• pp.91-102
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• 2000

자연점토지반에서의 중금속 흡착시 온도변화에 따른 영향은 지금까지 2차적인 것으로 간주되었다. 그러나 최근 몇몇 연구자들에 의하면 온도변화가 중금속 흡착 거동에 큰 영향을 미친다고 보고하였다. 따라서 본 연구에서는 자연점토 지반에 대한 중금속 아연(Zn) 흡착시 온도변화에 따른 흙의 각 구성성분별 흡착거동을 살펴보기 위해 혼합 흡착-연속추출법(combined absorption-sequential extraction analysis, CASA)을 사용하였다. 실험결과 중금속 아연의 농도가 저농도(50mg/L 미만)일 경우 자연지반에서의 분배양상은 주로 탄산염 형태로 존재하고, 또한 온도의 증가에 따라 탄산염 형태의 흡착량이 증가하는 것을 알 수 있다. 하지만 고농도(50mg/L 이상)의 경우 분배양상은 주로 이온교환형태로 존재한다는 것을 알 수 있다. 그러나 고농도에서의 이러한 분배형태는 온도의 증가에 따라 탄산염형태의 흡착량이 약 20%정도 증가하는 결과를 얻었다. 결론적으로 중금속 아연의 자연점토지반의 각 구성성분 별 흡착거동은 이온교환 형태를 제외하고 온도증가에 따라 증가하는 흡열반응(ΔH0>0)인 것으로 나타났고, 또한 고농도에서의 분배형태는 이온교환 형태에서 탄산염 형태로 변화되는 것을 알 수 있다. 그리고 이온교환 형태의 경우 온도변화에 따라 독립적인 거동을 보였다.

• Journal of the Korean Geotechnical Society
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• v.33 no.2
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• pp.35-47
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• 2017

Thermal behavior of soils is mainly focused on thermal conduction, and the study of natural convection is very limited. Increase of soil temperature causes natural convection due to buoyancy from density change of pore water. The limitations of the analysis using fluid dynamics for natural convection in the porous media is discussed and a new numerical analysis is presented for natural convection in porous media using THM governing equations fully coupled in the macroscopic view. Numerical experiments for thermal probe show increase in the uncertainty of thermal conductivity estimated without considering natural convection, and suggest appropriate experimental procedures to minimize errors between analytical model and numerical results. Burial of submarine power cable should not exceed the temperature changes of $2^{\circ}C$ at the depth of 0.2 m under the seabed, but numerical analysis for high permeable ground exceeds this criterion. Temperature and THM properties of the seafloor are important design factors for the burial of power cable, and in this case effects of natural convection should be considered. Especially, in the presence of heat sources in soils with high permeability, natural convection due to the variation of density of pore water should be considered as an important heat transfer mechanism.

• Geotechnical Engineering
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• v.16 no.6
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• pp.66-68
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• 2000

• Geotechnical Engineering
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• v.7 no.1
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• pp.93-116
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• 1991

• Geotechnical Engineering
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• v.32 no.4
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• pp.8-13
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• 2016

• Geotechnical Engineering
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• v.22 no.12
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• pp.56-60
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• 2006

• Magazine of korean Tunnelling and Underground Space Association
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• v.24 no.4
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• pp.9-18
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• 2022

• Geotechnical Engineering
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• v.26 no.3
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• pp.17-25
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• 2010