연약지반개량을 위한 지반가열공법은 경제성과 환경문제 등으로 인해 적용되지 않다가 최근 전기가열방식에 의한 지반가열장치가 개발되어 연구가 수행되고 있다. 본 연구에서는 지반가열공법의 열전달 특성을 규명하고자 수증기의 배출 유무에 따른 실내실험을 수행하고 이론해인 선형열원모델과 비교하였다. 수증기가 지표로 배출된 경우에는 열손실이 발생되어 지표보다는 지중의 온도 증가가 크게 나타났다. 수증기의 배출이 억제된 경우에는 수증기에 의해 급격한 온도변화가 반복적으로 발생되고 일정한 압력이상이 되면 수증기가 지표로 배출되어 온도가 감소되었다. 선형열원모델은 열원으로부터의 횡방향 거리에 따라 로그함수 형태로 감소되었다. 실험결과에서는 수증기가 배출되지 않는 심도에서는 지수함수 형태, 수증기가 배출되는 지표부근에서는 2차 함수형태로 감소되었다.
연약지반개량을 위한 지반가열공법은 경제성과 환경문제 등으로 인해 적용되지 않다가 최근 전기가열방식에 의한 지반가열장치가 개발되어 연구가 수행되고 있다. 본 연구에서는 지반가열공법의 열전달 특성을 규명하고자 수증기의 배출 유무에 따른 실내실험을 수행하고 이론해인 선형열원모델과 비교하였다. 수증기가 지표로 배출된 경우에는 열손실이 발생되어 지표보다는 지중의 온도 증가가 크게 나타났다. 수증기의 배출이 억제된 경우에는 수증기에 의해 급격한 온도변화가 반복적으로 발생되고 일정한 압력이상이 되면 수증기가 지표로 배출되어 온도가 감소되었다. 선형열원모델은 열원으로부터의 횡방향 거리에 따라 로그함수 형태로 감소되었다. 실험결과에서는 수증기가 배출되지 않는 심도에서는 지수함수 형태, 수증기가 배출되는 지표부근에서는 2차 함수형태로 감소되었다.
The heating method had a difficulty in applying for soil improvement until now, because it induced economical and environmental problems. However the electric heater was developed recently, which made the improvement and solution on heating treatment of weak soil. The lab test and theoretical analys...
The heating method had a difficulty in applying for soil improvement until now, because it induced economical and environmental problems. However the electric heater was developed recently, which made the improvement and solution on heating treatment of weak soil. The lab test and theoretical analysis were made for the verification of linear heating source model, futhermore the heat transferring mechanisms in soil were examined and analyzed. If the vapor was emitted out of soil surface, the heat loss made the soil temperature lower in surface than that of inner soil. However, if the vapor emission is prohibited, the temperature variation happened periodically. After reaching certain pressure, the vapor was emitted out of the soil surface, which reduced the soil temperature. The linear source model showed the log functioned temperature reduction according to the horizontal distance increase. To the contrary, the lab test results showed the exponential function if there was no vapor emission. But if vapor was emitted, the temperature reduction was appeared as the second degree polynomial function.
The heating method had a difficulty in applying for soil improvement until now, because it induced economical and environmental problems. However the electric heater was developed recently, which made the improvement and solution on heating treatment of weak soil. The lab test and theoretical analysis were made for the verification of linear heating source model, futhermore the heat transferring mechanisms in soil were examined and analyzed. If the vapor was emitted out of soil surface, the heat loss made the soil temperature lower in surface than that of inner soil. However, if the vapor emission is prohibited, the temperature variation happened periodically. After reaching certain pressure, the vapor was emitted out of the soil surface, which reduced the soil temperature. The linear source model showed the log functioned temperature reduction according to the horizontal distance increase. To the contrary, the lab test results showed the exponential function if there was no vapor emission. But if vapor was emitted, the temperature reduction was appeared as the second degree polynomial function.
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