지하공동구 내부환경 측정을 통한 결로판별에 관한 연구

Abstract

The underground utility tunnel is a very important infrastructure in modern urbanization. However, it istrue that a lot of problems are being pointed out such as the reduction of air quality, reduction of ventilation volume,dew condensation and non-emission of poisonous gas due to the lack of smoke ventilating facilities in case of a firebreaking out in a utility channel because, in relative contrast to the rise in demand of underground utility tunnels inthe city, the factors of underground space had not been reflected properly in the design and construction of undergroundutility tunnels and its maintenance system. Especially, out of these problems, dew condensation may cause the weakeningof structural durability, and inflict damages such as corrosion to indoor facilities and electric leakage of electricpower facilities. Therefore, the purpose of this study is to establish a database for the environmental information ofunderground utility tunnels by measuring the temperature, humidity, surface temperature and air stream velocity inunderground utility tunnels, and to use it as base data for determining dew condensation The underground utility tunnellocated at Inchon, Korea was selected as the subject for the study. It was measured during the autumn season andwinter season, each 3 days. The temperature at the utility tunnel was measured by 0.48oC and 9.35oC, respectivelyduring the operation of mechanical ventilation and the temperature of the outlet increased by 0.66oC and 0.09oC each. The surface temperature of the utility tunnel was measured −0.48oC on average. As a result of measuring the undergroundutility tunnel which was the subject of this study, it is considered that there will be almost no damages suchas the weakening of structural durability, corrosion of indoor facilities and electric leakage of electric power facilitiesbecause the conditions for dew condensation have not been met.