Study On Thermal Environment Of Bus Platform In Chongqing Main Urban Area In Summer

Urban public transport is an important part of modern cities,which bears the important responsibility of maintaining the efficient operation of the city and realizing the diversion of personnel.Urban public facilities are not only the guarantee of the effective operation of urban public transport,but also the part of frequent contact among users in daily life.As an integral part of transportation facilities,bus platform is not only a simple waiting space,but also responsible for maintaining the normal operation of the public transport system.Therefore,one of the main topics of urban design is to explore how to ensure that urban public space not only meets the basic service needs of citizens,but also has better environmental comfort.The main work of this paper is as follows:Firstly,By means of street map tools and field investigation,1126 bus platforms in Chongqing’s main urban area were randomly selected for research.The status quo of bus platforms in Chongqing’s main urban area was analyzed according to the type of platforms and environmental conditions.At present,the main city of Chongqing to bus platform forms are uneven,platform facilities are not perfect,about 26% of the bus platforms lack sunshade and rain shelter facilities,52% of the platform area without trees to provide shade,the construction and renewal of bus stations is relatively slow.Secondly,On the basis of investigation,four typical platforms with different spatial characteristics are selected as the research objects to conduct behavioral map research and questionnaire survey on user distribution.Besides dealing with the waiting area of the platform,the trees and flower pools around the platform also affect the parking behavior of the users.Residents’ actual feelings of different platforms in different environments are different,among which the platforms with dense vegetation and open space have the highest satisfaction.Thirdly,Select four typical days in July 2018 to carry out on-site measurements on four typical bus platforms in the main urban area of Chongqing.Experiments show that there are also significant differences in the temperature of platform space and ancillary facilities in urban bus stations with different orientation and shelter environments.The micro-environment of platforms with vegetation in open areas is better;the micro-environment of platforms in closed streets with no vegetation or sheltered buildings is worst;the micro-environment of platforms can be improved by vegetation and buildings,and the effect of vegetation is better than that of buildings.Then,Through the Envi-met software,the microclimate of typical street space is simulated and analyzed.Through the study of the temperature field and wind field variation law of various typical street space under typical weather conditions,the suitable location and potential space environment optimization strategy of bus station location under different street space modes are put forward.Lastly,Introduce the design cases of several typical bus stations.Take Curibati Tube Bus Station in Brazil and Xiamen Elevated Bus System in China as typical cases to analyze the design of bus stations.On the basis of summarizing the research,experiment and software simulation,this paper puts forward the measures to improve and optimize the micro-environment of bus platform under different street conditions in Chongqing,which lays a foundation for further research.