混合铁路网下的京津冀重要城市节点通达性分析

Accessibility Analysis of Important Urban Nodes in Beijing-Tianjin-Hebei Region Considering the Mixed Railway Networks

通达性已经成为影响城市区域一体化联系与发展的先决条件,研究混合铁路网下各城市节点的通达性在京津冀一体化大背景下有着重要的现实意义。文章考虑高速铁路、普速铁路组成的混合铁路网,基于距离度量模型和空间句法分别建立实际出行通达性模型和拓扑空间通达性模型,研究京津冀重要城市节点之间的通达性状况,分析其与城市政治、经济定位的匹配现状。结果表明:当前混合线网条件下,京津两地铁路出行便捷,通达性优势明显,且与其政治经济地位匹配良好;保定、石家庄、廊坊、衡水、唐山、沧州、邢台、邯郸次之;张家口、承德、秦皇岛处于第三梯队,通达性不佳且未能很好地匹配其政治经济定位。

Accessibility has become a prerequisite for the connection and development of urban regional integration.It is of great practical significance to study the accessibility of urban nodes under the mixed railway network on the background of Beijing-Tianjin-Hebei integration.In this paper,the mixed railway network composed of high-speed railway and universal railway is considered,and the actual travel accessibility model and topological spatial accessibility model are respectively established based on the distance measurement model and spatial syntax,so as to study the accessibility status of important urban nodes in Beijing-Tianjin-Hebei region,and analyze the current situation of its matching with the political and economic positioning of the city.The results show that under the condition of the current mixed line network,Beijing and Tianjin has obvious advantages of accessibility,and match with its political and economic status.Baoding,Shijiazhuang,Langfang,Hengshui,Tangshan,Cangzhou,Xingtai,and Handan take second place.Zhangjiakou,Chengde,and Qinhuangdao are in the third echelon with poor accessibility and fail to match their political and economic positioning.