Research On The Integrated Analysis And Spatial Optimization Approach Through Urban Physical Environment Interactive Sandbox Based On Multi-Source Big Data

With the continuous development of economic level and the gradual deepening of urbanization,China's cities are experiencing a rapid development period of rapid expansion of space and rapid increase in construction capacity.The dramatic urbanization has improved living standards to a certain extent,but it also increases the environmental burden.In the past,the study of the physical environment of the urban external space focused on the measurement and simulation of a single urban physical environment(wind and light heat,etc.)and a small amount of correlation research on spatial morphology.However,since the urban physical environment is a whole with many factors,the optimization of a single aspect does not bring about comprehensive benefits.On the contrary,it may worsen the physical environment of another aspect,so that the optimization of the physical environment is delayed into sustainable planning.Come to work.Therefore,it is of great significance to simulate and evaluate the physical environment of the urban external space with integrated and integrated thinking and to explore its interaction mechanism with spatial form.In the first part,this paper systematically combs the research on urban physical environment.The physical environment factors(wind environment,acoustic environment and thermal environment)of the three core cities with the greatest correlation with urban planning are clarified,and their connotation characteristics are proposed: near-ground space,comprehensive integration,subjectcustomer consideration and interaction optimization.Taking Xinjiekou Central District in Nanjing as an sample for actual measurement,this paper takes the block as the research unit to conduct physical environment simulation and data space integration.The spatial integration of physical environment factors in each city is carried out through a weighted approach of subjective and objective,using the average wind speed,the average equivalent sound pressure level and the PET human equivalent temperature as three indicators to achieve the empowerment through subjective and objective consideration.In the subjective weighting method,not only the comfort preference of different individuals to the physical environment factors of each city is considered,but also the influence of different functional areas on individual preferences.In the second part,this paper discusses the correlation between the physical environment of urban central area and urban spatial form from the perspectives of urban spatial form indicators and urban spatial form units.From the perspective of urban spatial form indicators,spatial morphological indicators such as average height,building density,maximum height,enclosure degree,and building sag are used as independent variables,and various physical environment evaluation data and comprehensive physical environment evaluation data are used as dependent variables to explore the correlation analysis.This paper takes the sample central block as the research object,and divides it into 11 different physical environments through its combination of physical environment evaluation and wind and sonic environment.The types of scenarios and 22 typical units were selected to further analyze the interaction mechanism between physical environment and spatial morphology through comparative analysis.The paper then summarizes the design commonality and contradiction between various urban physical environment factors,and proposes a practical and targeted step-by-step spatial optimization strategy for typical urban districts in Nanjing.Compared with the previous top-down ideal unit city physical ring simulation study,the optimization strategy of this paper is more local and targeted.The paper has a total words of 89502,illustrations of 51,tables of 39.