Research On Spatial Distribution Optimization Of High Density Urban Residential Area Based On Fine Particle Distribution

At present,China’s urbanization process is facing many environmental problems such as air pollution,urban smog and heat island effect,which directly affect the living comfort and environmental air quality of people in urban settlements.In urban and rural planning and architectural design,urban environmental quality and other fields are social hot topics,it is of positive theoretical and practical significance to discuss the planning and architectural design of urban settlements in the context of "low carbon,ecology,health,and energy saving".The thesis uses literature collection,field investigation,actual measurement research and computer simulation to take the Jinzhai Road Viaduct and the South Second Ring Road intersection in Hefei as the reference point,and the spatial distribution of urban settlements within a radius of 1 km as the research object.Carry out the following research:First of all,through on-site surveys and actual surveys,sort out the basic information of urban settlements within the scope of the study,investigate the current environmental pollution of urban settlements,organize the basic form of spatial layout and the hot spots of architects in planning and design,pass Field investigation and index analysis summarized and analyzed the pollution status of the high-density urban residential space layout.The results show that urban viaducts and main road traffic pollution and residential life pollution are the main sources of pollution in urban settlements.Secondly,Envi-met simulation software is used to numerically simulate the concentration distribution of fine particles and building environmental factors in typical urban settlements.Summarize its distribution law.Based on the analysis of the measured basic data in the early stage,combined with ArcGIS software to analyze the spatial chart visualization,mainly from three aspects of building layout,traffic road network,landscape greening,etc.,to study the distribution of fine particles and building environmental factors and their spatial form feature.The results show that:(1)The concentration of fine particles in the mixed enclosed type is the lowest,and the concentration of fine particles in the enclosed high-rise buildings is the highest;(2)The north-south layout of the road network is more conducive to the spatial diffusion of the concentration of fine particles,and the closer to the pollution source road,the spatial layout is The greater the impact of the concentration of fine particles;(3)In the landscape greening form,the concentration of fine particles of shrubs and shrubs is the lowest,and the concentration of fine particles of grasslands is the highest.From large to small,the order is grassland> hedge grass> broadleaf tree> broadleaf tree>control(Square)> Joe shrub.Finally,combined with the measured data law,based on reducing the concentration of fine particles in the spatial environment,the following optimization suggestions are proposed for the spatial layout of urban settlements,mainly including:(1)blocking the generation of pollution sources such as fine particles,thereby optimizing the spatial shape of urban settlements;(2)promote the spatial diffusion of fine particles,thereby optimizing the layout of the building monomer;(3)accelerate the absorption and settlement of fine particles,thereby optimizing the landscape configuration of public spaces.The thesis analyzes the spatial distribution characteristics of the concentration of fine particles and building environmental factors in urban settlements,and analyzes the spatial layout of urban settlements in terms of building layout,road layout and greening layout.The design methods of the spatial layout of the district are summarized.The research methods,technical routes and results achieved in this research work not only provide important guidance for the study of the relationship between fine particles and spatial layout in the environment of urban residential areas,but also for the relationship between fine particles and built environmental factors And reference value to establish a research foundation for improving and improving the environmental quality of urban settlements.Figure [51] Table [28] Reference [94]...