Analysis of indoor environment state characteristics of urban rail transit stations based on actual measurements in Chongqing, China

Abstract

The thermal environment, air quality, acoustic environment and light environment of four representative stations were tested in this study to clarify the key directions for regulation of indoor physical environment. The results indicate that whether it is a single environment or an overall environment, the satisfaction rate of passengers does not exceed 60 %. Moreover, indoor temperature control in the thermal environment should be prioritized, and the dynamic thermal comfort evaluation index should be further discussed. The concentration of carbon dioxide in stations is primarily affected by the flow of passengers, and controlling particulate matter should be the focus. Regarding the acoustic environment, the noise distribution ranges from 57.8 to 84.6 dB, which is obviously high. For elevated stations, the light environment primarily controls the glare, whereas for underground stations, the priority should be the reasonable optimization of lighting design requirements. There are different degrees of problems in the physical environment of the station. Therefore, strengthening the demand analysis and reasonably establishing new standards for railway stations should be prioritized in the development of future green rail.