Experimental Study on Heat Transfer Characteristic by Ground Heating Method

Abstract

지반 개량을 위한 지반가열공법은 소련의 지반공학자인Beles and Stăănculescu(1958)와 Litvinov(19601961) AbstractThe 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.