交通网络建设与成渝城市群一体化发展——基于交通设施网络和需求网络的分析

交通基础设施建设是城市群一体化发展基本内容和重要保障。以成渝城市群为研究案例，利用复杂网络分析方法，探讨了交通设施网络和交通需求网络下城市群一体化格局，并分析了交通基础设施建设对城市群一体化的影响。结果表明：（1)交通基础设施建设拓展了城市间的联系渠道，有助于形成多中心、均衡化的交通设施网络格局，并塑造城市带和城镇密集区的雏形。（2)以客流衡量的交通需求网络依然呈现以成都和重庆主城为中心的双核心格局，多中心态势并不显著，但高铁的开通增强了城市客流网络。（3)交通设施网络的完善推动了成渝城市群形式一体化，但人口流动、产业合作等表现出的功能一体化水平依然偏低。因此，未来成渝城市群在完善区域交通运输系统的同时需要探索以交通促进城际人口流动、产业合作、城乡统筹等的发展路径，以交通网络建设带动城市群空间结构的优化调整，最终实现区域深度一体化。

Transport Network Construction and Integrated Development of Chengdu-Chongqing Urban Agglomeration:A Study Based on Transport Infrastructure Network and Transport Demand Network

The regional integration is a key content of the development of urban agglomerations. While the transport network is one of most important driving forces for the integrated development of urban agglomerations. Located at the intersection of “the Belt and Road” and “the Yangtze River Economic Zone”, the Chengdu-Chongqing Urban Agglomeration plays an important role in promoting the economic growth of western China. Based on complex network analysis method, this paper investigates the integrated development process and pattern of Chengdu-Chongqing Urban Agglomeration from perspective of transport supply network and transport demand network, which is represented by passenger flow. Besides, the impacts of transport network construction on the integrated development of urban agglomeration also is discussed. The result shows: (1) Construction of transport infrastructure expands the connect channels between cities significantly, which contribute to formation of a polycentric and equalized structure of transport network. These new transport infrastructure shapes the rudiment of urban corridors and clusters. (2) The transportation demand network measured by passenger flow still presents a dual-cores structure centered on Chengdu and Chongqing, and the polycentric structure in Chengdu-Chongqing Urban Agglomeration has not been formed. The operation of HSR lines have greatly strengthened the passenger flow between cities along the HSR. (3) The improvement of transport infrastructure network has promoted the connections of cities in Chengdu-Chongqing Urban Agglomerations. However, the level of functional integration demonstrated by intercity population mobility and industrial cooperation is still low, which restricts the process of transportation integration in return. In general, it is necessary to explore paths to integrate the transportation system with local social-economic development for Chengdu-Chongqing Urban Agglomeration, such as intercity population mobility, industrial cooperation as well as urban-rural integration between cities in these area. Meanwhile, construction transport infrastructure is an efficient way for optimizing the spatial structure of Chengdu-Chongqing Urban Agglomeration at this stage, for achieving the deep and comprehensive integration of region. Besides, the governments of the main cities should strengthen dialogue and cooperation to avoid unbridled competition between cities in infrastructure construction and industrial development.