西北地区铁路建设对区域可达性空间格局的影响

Influence of Railway Construction on Spatial Pattern of Regional Accessibility in Northwest China

铁路是改善城市可达性的重要基础设施,城市可达性的改善可以推动区域空间结构优化并提升区域经济联系强度。以西北地区陕西、甘肃、青海、宁夏和新疆的铁路网络为研究对象,运用可达性潜力模型分析"十一五"至"十三五"时期西北铁路网可达性空间格局的演进,再通过社会网络分析方法研究铁路网的演进对部分城市中心度和联系度的影响。研究结果表明,在"十三五"末期西北地区铁路网基本形成沿丝绸之路经济带的"核心+走廊"的形态,铁路建设将会更好地带动西北地区交通网络的协调发展,缩小区域之间的差异,为西北地区的经济繁荣发展提供强有力的交通基础设施保障。

Railways are important infrastructure for the improvement of urban accessibility, which can optimize the regional spatial structure and strengthen regional economic ties. Taking the railway networks in Shaanxi, Gansu, Qinghai, Ningxia, and Xinjiang in Northwest China as the research objects, this paper first analyzed the spatial pattern evolution of railway network accessibility from the 11 th Five-Year Plan period to the 13 th Five-Year Plan period with the accessibility potential model. Then, it studied the influence of railway network evolution on the centrality and connectivity of some cities through social network analysis. The results show that at the end of the 13 th Five-Year Plan period, the railway networks in Northwest China basically formed the pattern of "core + corridor" along the Silk Road Economic Belt. Railway construction better promotes the coordinated development of the transportation network in Northwest China and narrows regional differences, providing firm transportation infrastructure guarantee for economic prosperity in Northwest China.