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

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

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。

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.