Research On The Coordinated Evolution And Development Of Transportation Network And Urban Spatial Structure In Chengdu-Chongqing Economic Circle

Under the influence of multiple factors such as domestic and international socioeconomic situation,national strategic development requirements and regional realistic conditions in the new era,the development status and advantages of Chengdu Chongqing region are extremely prominent,and the proposal of the dual city economic circle strategy pushes the regional development to a new height.The strategy of Chengdu Chongqing double City Economic Circle emphasizes the need to firmly establish the idea of integration,take high-quality development as the core theme,and promote the improvement of the overall coordination level of the region.Among them,the transportation network and urban spatial structure form the skeleton of regional development in the form of "path" and "node",which is not only an important cornerstone to support the high-quality construction in Chengdu and Chongqing,but also an important condition to promote the overall coordination of the region.Based on this,this paper takes the coordinated development of transportation network and urban spatial structure as the starting point,combined with the basic theory of their coordinated development,and based on Arc GIS,UCINET,Gephi and Envi software,focusing on the scale of transportation construction,transportation capacity,organization level,urban economy,industry,social population and spatial construction,Comprehensively analyze the overall evolution of the transportation network and urban spatial structure of the twin city economic circle in Chengdu Chongqing area,and identify the synergistic relationship between the development of the two through the joint analysis of Arc GIS spatial superposition.On this basis,the evaluation index system of transportation network and urban spatial structure system is comprehensively constructed,and the coupling coordination degree model and obstacle degree model are adopted respectively to further explore the synergy level and the influencing factors of synergy obstacles between transportation network and urban spatial structure,so as to put forward the coordinated development optimization path of transportation network and urban spatial structure,The purpose is to provide some guidance for the overall coordinated development of high quality in Chengdu and Chongqing.The results show that:(1)The factors constituting the transportation network and urban spatial structure have changed significantly,and there are obvious differences.However,the synchronous characteristics of the overall development of the transportation network and urban spatial structure of the twin city economic circle in Chengdu Chongqing area are significant.With the high status of transportation network,the regional competitiveness of urban spatial structure will be strong;On the contrary,the lower the level of transportation network,the lower the comprehensive strength of urban spatial structure in the region.It can be judged that the regional transportation network and urban spatial structure have formed a synergistic relationship in the development process,so as to promote the overall improvement of each other’s development status.(2)The overall coordinated development level of transportation network and urban spatial structure in Chengdu Chongqing twin city economic circle is low,and most areas are still in the stage of imbalance and barely coordination,showing obvious spatial differentiation.Among them,in the whole region and most cities and counties,the transportation network is always the primary obstacle system affecting the coordinated development of the two systems,and the impact of urban spatial structure is slightly weak.The influence degree of the obstacles of each element of the system is as follows: transportation capacity > organization level >Economic Industry > spatial construction > social population > construction scale.The five indicators are the most prominent,including the intermediary centrality of transportation network,the area of urban built-up area,the density of regional GDP,the total industrial output value per capita and the weekly freight volume.(3)According to the general situation,characteristics and influencing factors of the coordinated development of transportation network and urban spatial structure,Chengdu Chongqing region should explore the path of the coordinated development and optimization of transportation network and urban spatial structure around the three levels of the overall strategic pattern,the improvement of transportation network and the optimization of urban spatial structure in the future.