中国城市群高铁通达格局与空间交叠特征  

High-speed railway access pattern and spatial overlap characteristics of China's urban agglomerations

作　　者：郑文升[1,2,3] 熊亚骏 王晓芳 黄建武[1] ZHENG Wensheng;XIONG Yajun;WANG Xiaofang;HUANG Jianwu(College of Urban and Environmental Science,Central China Normal University,Wuhan 430079,China;Wuhan Branch of China Tourism Academy,Wuhan 430079,China;Hubei High Quality Development Institute,Central China Normal University,Wuhan 430079,China)

机构地区：[1]华中师范大学城市与环境科学学院,武汉430079 [2]中国旅游研究院武汉分院,武汉430079 [3]华中师范大学湖北高质量发展研究院,武汉430079

出　　处：《地理学报》2023年第4期930-945,共16页Acta Geographica Sinica

基　　金：国家自然科学基金项目(41971167);华中师范大学基本科研业务费(CCNU22JC026)。

摘　　要：交通网络构筑了城市关联骨架,发达的交通网络能够深刻影响城市空间联系并重塑区域空间格局。本文使用2021年高铁客运时刻数据,以《交通强国建设纲要》中提出的建设“全国123出行交通圈”为切入点,对比分析了全国城市群以及中心城市通达格局及差异,进一步使用SLPA模型对全国所有高铁通达城市进行社区划分与交叠空间识别,探究区域空间格局演化态势以及交叠空间地理特征。研究结论为:(1)中国城市群2 h内通达的数量为15个,占城市群总量的79%;城市加权平均通达时间上,呈现由中心地区向外围地区由低向高扩大的“圈层式”空间格局。(2)中心城市3 h通达等值线覆盖圈大多超出城市群范围,表现出“泛城市群”空间特征。(3)通过交叠社区发现算法将中国城市网络空间划分为14个社区,“胡焕庸线”以西仅有3个社区。(4)对已划分社区进行交叠空间识别,存在交叠的9个社区共有27个交叠城市产生。(5)在空间形态上,交叠城市呈点状或带状分布;从空间区位来看,交叠城市多位于区域中心城市周边,在行政区划上多处于省间交界地带;在城市功能上看,交叠城市依托高铁流通道,凭借过渡与转换功能,表现为社区间网络联系桥梁。高铁交通视角下区域空间格局呈现跨城市群联系与组团发展态势,交叠空间网络化、交互式、跨尺度作用特征凸显。总体来看,使用SLPA交叠社区发现模型研究区域交叠问题具有一定说服力。为了城市和区域更好的发展,对已划分出的交叠社区,可以尝试填补空白区域并提升社区间运能;对已识别出的交叠空间,可以尝试结合自身优势创造更多跨区域联系可能。A well-developed transportation network can profoundly influence the spatial connection of cities and reshape the regional spatial pattern.This paper used 2021 high-speed railway passenger time data,and took the construction of"National 123 Travel Traffic Circle"proposed in the"Outline for the Construction of a Strong Transportation Country"as the starting point.It compares and analyzes the access patterns and differences of national urban agglomerations and central cities,and further uses the SLPA model to identify the community division and overlapping space of all high-speed railway connected cities in China,and explores regional development trend and the geographic characteristics of overlapping space.Some conclusions can be drawn as follows:(1)There were 15 urban agglomerations with 2-hour access to Chinese urban agglomerations,accounting for 79%of the total number of urban agglomerations,and the weighted average access time of cities showed a"circle-type"spatial pattern of expanding from the central area to the peripheral areas from low to high.(2)Most of the 3-hour access contour coverage areas of central cities are beyond urban agglomerations,showing the spatial characteristics of"cross-urban agglomerations".(3)The overlapping community discovery algorithm divides China's urban space into 14 communities,and there are only 3 communities west of the Hu Line.(4)The overlapping space was identified for the divided communities,in which 9 communities overlapping a total of 27 cities were generated.(5)In terms of spatial morphology,the overlapping cities were distributed in a point or belt pattern;in terms of spatial location,the overlapping cities are mostly located around the regional central city,and in terms of administrative divisions,they were mostly in the interprovincial junction zone;in terms of urban function,the overlapping cities rely on the highspeed railway circulation channel,and through the transition and conversion function,they were manifested as a network connection bridge between communities.

关 键 词：城市群 高铁通达格局 交叠社区模型 社区划分 交叠空间 

分 类 号：U238[交通运输工程—道路与铁道工程] TU984.113[建筑科学—城市规划与设计]