高铁对区域可达性与空间联系格局的影响——以长三角城市群为例

The Impact of High Speed Rail on Regional Accessibility and Spatial Linkage Patterns:A Case Study of the Yangtze River Delta City Cluster

以长三角城市群为研究区域,基于城际高铁通行时长、班次数据、人口流动数据,利用平均旅行时长、社会网络分析研究高铁对区域可达性和空间联系格局演变的影响,发现:(1)高铁推动各大中小城市均衡地接入长三角高铁网络,区域可达性整体水平提升了50%,但过长的途外附属时间使得未开通高铁的城市、中小城市在区域可达性格局中处于劣势。(2)高铁推动了长三角空间联系格局的非均衡演变,在中心辐射型高铁网络的带动下,人口趋于向上海、南京、杭州、合肥等中心城市流动,与周边地区形成同城化的核心边缘模式,而未开通高铁的城市与外围城市在空间联系格局中面临着要素流失的困境。(3)总结了高铁影响区域发展的作用路径,为推动长三角高质量和区域一体化发展提出相关建议。

Taking the Yangtze River Delta city cluster as the study area,based on intercity high-speed rail travel time,frequency,and population flow data,the study investigates the impact of high-speed rail on the evolution of regional accessibility and spatial linkage patterns using average travel time and social network analysis.The study finds that the high-speed rail has promoted balanced access of large,medium and small cities to the Yangtze River Delta high-speed rail network,and the overall interregional transportation time is reduced by 50%,but the excessive out-of-route subsidiary time put cities without high-speed rail,medium and small cities at a disadvantage in the regional accessibility pattern.In addition,high-speed rail has promoted the uneven evolution of the regional connectivity pattern in the Yangtze River Delta.Driven by the central radiating high-speed rail network,the population tends to flow to the central cities such as Shanghai,Nanjing,Hangzhou,and Hefei,forming a core-edge pattern of co-location with the surrounding areas,while the cities without high-speed rail and peripheral cities face the dilemma of factor loss in the regional connectivity network pattern.Finally,the study qualitatively summarizes the role paths of highspeed railways in influencing regional development and makes relevant suggestions for promoting high-quality development and balanced regional development in the Yangtze River Delta.