日流量视角下铁路客运网络时空格局演变——以成渝地区双城经济圈为例

基于长时序列车时刻表数据，对成渝双城经济圈内铁路客运网络可达性、铁路日流量时空特征展开分析，采用社会网络分析对铁路客运网络展开研究。结果表明：① 成渝双城经济圈铁路客运网络发展经历了双城割裂、廊道构筑与网络完善3个阶段，可达性呈现出沿双城廊道收敛的“哑铃式”空间格局，运量主轴带集聚作用显著，呈由北向南转移态势；② 经济圈铁路客运组织模式由双核扩散转变为廊道集聚扩散；③ 双核凝聚子群范围不断扩大，经济圈铁路客运网络一体化水平大幅提升。

Spatial Connection Pattern and Evolution Trend of Railway Passenger Transport Network from the Perspective of Daily Traffic: Taking Chengdu-Chongqing Twin-City Economic Circle as an Example

Based on long time series train schedule data, this paper analyzes the spatial and temporal characteristics of railway passenger network accessibility and daily railway flow in Chengdu-Chongqing Twin-City Economic Circle, use social network analysis to study the railway passenger network. The results show that: 1) The development of railway passenger transport network in Chengdu-Chongqing Twin-City Economic Circle has experienced three stages: the division of the twin cities, the construction of corridors and the improvement of network. The accessibility shows a dumbbell spatial pattern of convergence along the corridors. 2) The organization mode of railway passenger transport in economic circle has changed from dual nuclear proliferation to corridor agglomeration and diffusion; 3) The scope of binuclear condensed subgroups keeps expanding, and the integration level of railway passenger transport network in economic circle is greatly improved.