轨道交通影响下的河谷型城市职住空间结构演变OA

The complexity of jobs-housing spatial relationships is one of the typical characteristics of river-valley cities.The rail transit's construction and operation,as an intervention for urban space,affects the redistribution of jobs-housing space in such cities,which represents a significant topic in urban spatial research.This study takes the urban core of Lanzhou City as its research object.By comprehensively utilizing Baidu Huiyan population data,POI data,and questionnaire survey data,and employing methods such as kernel density estimation,standard deviational ellipse,jobs-housing ratio calculation,commuting OD analysis,spatial autocorrelation analysis,transportation network construction,and facility service area analysis,it systematically examines the changes in jobs-housing patterns before(2018)and after(2024)the operation of the rail transit system.The results indicate that:1)Rail transit has altered the traditional distribution pattern of jobs and housing,guiding employment sub-centers to disperse towards corridors such as Yantan-Donggang,forming a polycentric employment structure.2)Areas within a 1.5km radius of rail transit stations form high-intensity employment agglomerations,while peripheral zones outside the rail transit influencing area are predominantly residential.3)The average commuting time in Lanzhou has shortened by 46.2％with rail transit,and the effective commuting radius has expanded to over 15km.4)Residential land has expanded at the edges of terminal stations,commercial land is highly concentrated within 1km of stations,and the growth rate of comprehensive service land along the rail line has reached 156％.The rail transit system in Lanzhou is transforming the jobs-housing spatial structure.While it promotes the formation of an east-west polycentric jobs-housing pattern and enhances commuting efficiency,it also intensifies the jobs-housing separation inside and outside station areas and triggers spatial supply-demand contradictions.The synergy between urban planning and rail transit is a critical pathway for promoting the sustainable development of urban functional spaces.This research contributes to a deeper understanding of the mechanisms and patterns through which rail transit influences the jobs-housing space of river-valley cities,providing a theoretical basis for urban and transportation planning.