长江中游城市群高速铁路可达性格局及演变

The Spatial Pattern and Evolution of High-Speed Railways Accessibility of the Urban Agglomeration in the Middle Reaches of the Yangtze River

基于城市间列车最短时间距离数据,使用最短时间距离模型、可达性系数和经济潜力等度量交通网络通达性的指标,分析了高速铁路建设对可达性的影响。结果显示,高速铁路快速崛起,时间压缩效益显著,可达性获得极大的提升;传统铁路、现状高速铁路和规划高速铁路情形下的可达性空间格局呈'核心—边缘'模式,高速铁路建设促进了相对区位较优越地区向周边地域的迅速扩张,壮大了城市的发展潜能;城市群的可达性格局受高速铁路网络发育水平的显著影响,高速铁路建设初期强化了区域可达性的分异,而随着路网的完善,区域可达性的差异逐渐弱化。科学地研究和呈现城市群高铁建设前后区域可达性格局与差异,对于有效实现区域间交通网络的科学对接及区域一体化发展具有重要的现实意义。

This article based on the shortest distance data of the intercity train,and using the shortest time distance model,accessibility coefficient and economic potential coefficient to measure the spatial pattern and evolution of speed railways accessibility of the urban agglomeration in the middle reaches of the Yangtze River,and analysis of the impact of high-speed railway on accessibility.The results show that high-speed railways reduce inter-city travel time and improve accessibility.The accessibility pattern of the traditional railway,the existing high-speed railway and the planned highspeed railway is'core-periphery'model.The construction of high-speed railway improved the relative location conditions of some cities and promoted the sustainable development of urban development potential.The accessibility pattern of urban agglomeration is affected by the development level of high-speed railway network.High-speed railway construction in the early strengthening of the regional accessibility differences,and with the improvement of road network accessibility is more balanced.It is of great practical significance to scientifically study and present the regional character and difference of urban agglomerations before and after the construction of high speed railway.