【摘要】 高度一体化、各级城市协调发展的城市群是城市化的主体形态,城市群的建设和发展是新型城镇化时期重要的国家战略。基于"流空间"和"中心流"理论,以长三角城市群的沪宁、沪杭走廊地区为实证案例,揭示城际铁路对区域极化——均衡发展及其对城市群空间结构重塑的作用。以县级市(区)为基本分析单元,重点考察城际铁路沿线这类二级节点与区域核心节点、一级城区节点之间的空间网络关系。对比城际铁路开通初时和开通数年后各节点之间的空间网络变化,结果显示城际铁路沿线地区形成了"水平嵌套+垂直极化"的复合网络模式,表明城际铁路在总体上促进了城市群的空间网络扁平化,尤其是沪宁走廊上海—常州区段的多中心水平联系增强;而沪杭走廊的网络均衡效应较不显著。最后,提出了基于城际铁路的城市群多尺度交通整合和空间网络优化建议。更多还原

【Abstract】 Mega-region in which cities of all levels develop coordinately and integratedly has become the dominant form of urbanization. It is a national strategy in the era of new-type urbanization in China. Based on the theory of "space of flows" and "central flow" and empirical data of Hu-Ning and Hu-Hang Corridors in the Yangtze Delta Region, this research sheds light on the effect of C-HSR on the reorganization of the regional city network. Taking county as the basic unit, the relationship between second-level nodes and other ones such as first-level nodes and core nodes is analyzed. The change of spatial network based on passenger flows both in the year of C-HSR opening and thereafter is contrasted. The current spatial network of the intercity rail corridors shows a hybrid pattern of both balance and polarization.It is demonstrated that C-HSR is conducive to balanced spatial network, especially in the Shanghai-Changzhou segment of the Hu-Ning corridor, where inter-city connections of second-level nodes with other nodes in different administrative areas and nodes of different levels increase markedly; nevertheless, the balanced effect is weak in the Hu-Hang corridor. Suggestions of transport integration and spatial optimization at multi-scales are proposed based on the above findings.更多还原