城市群空间结构演变规律及优化方向研究——以成都平原经济区为例

RESEARCH ON THE EVOLUTION RULES AND OPTIMIZATION DIRECTION OF THE SPATIAL STRUCTURE OF URBAN AGGLOMERATION:A CASE STUDY OF CHENGDU PLAIN ECONOMIC ZONE

城市群发展的空间结构演变有着明显的阶段性特征。首先,本文基于国内外城市群的空间结构研究,提出城市群空间结构演变一般包括“增长型-点轴型-网络型-流动型”4个时期,并详细阐释了具体特征。其次,以成都平原经济区为例,通过对夜间灯光影像的研究,发现其已具备迈入“网络型城市群”的基础,继而从“网络型城市群”的3个特征入手,构建一套可相互比较的网络化特征指标体系,并与国内网络化特征较为显著的,上海大都市圈进行对比,判识出成都平原经济区正处于“点轴型城市群”向“网络型城市群”过渡的阶段。最后,从强化点轴带动作用,推动中心城市升级、培育网络节点、促进各类要素高频次流动两个方面,对成都平原经济区的空间结构提出优化建议。

The evolution of the spatial structure of urban agglomerations shows obvious multi-stage characteristics.Based on the research on the spatial structure of urban agglomerations at home and abroad,this paper proposed that the spatial structure of urban agglomerations experienced four phrases of “growth pole–point axis–network–convection”,and further elaborated on the features of the spatial structure.Taking the Chengdu Plain Economic Zone as the study area,this paper found that it has the foundation to step into the stage of “network-type urban agglomeration” according to the study of nighttime light images.In order to further explore the point of view,this paper focused on the three characteristics of “network-type urban agglomeration”,and built an evaluation system for contrastive analysis.By comparing with Shanghai Metropolitan Area which shows clear “network-type urban agglomeration” features,this paper found that the network characteristics of the Chengdu Plain Economic Zone are not significant.Currently,the Chengdu Plain Economic Zone is in a stage transiting from “point-axis urban agglomeration” to “network-type urban agglomeration”.Finally,this paper put forward the optimization suggestions for the spatial structure of Chengdu Plain Economic Zone,including strengthening the driving role of point and axis,as well as upgrading central cities,cultivating network nodes,and promoting the high-frequency flow of various elements.