| With the expansion of highways in Shandong Province,the communication between cities in Shandong Province is close,and the phenomenon of "urban agglomeration" is obvious.Expressways can improve regional accessibility and change the spatial form of urban agglomerations,but the restrictions on urban space are undeniable.It is also worth considering that the current forms of social and economic transformation are becoming more and more diverse,the modes of transportation are becoming more integrated,and the development of expressways may be relatively saturated.In view of this,this paper uses the total mileage data of expressways in Shandong Province over the years,combined with the corresponding measurement indicators,to explore the mode of action and influence trend of expressway construction in Shandong Province on the spatial structure and spatial form of urban agglomerations.Through literature analysis,this paper reviews the research progress and research methods of domestic and foreign scholars on the spatial structure and shape of urban agglomerations and the impact of highways on them.The most direct manifestation of human activity factors.The development of expressways has an effect on the evolution of urban spatial structure mainly through the three aspects of "population scale","land use" and "industrial layout",and the resulting land scale will construct the urban spatial form.Through the urban agglomeration abundance index,information entropy,equilibrium degree,traffic connection gravity model,push-pull effect model,fractal correlation dimension and other models and methods,this paper deeply analyzes the impact of expressways on Shandong Province urban agglomeration and the included provincial capital economic circle and Jiaodong economy.The influence of the spatial form of the economic circle in southern Shandong.It is found that:(1)the abundance indices of urban agglomerations in Shandong Province and the three major economic circles are on the rise,and the increase in total expressway mileage has a significant positive correlation with the increase in the abundance index of urban agglomerations;(2)Shandong The increase of the mileage of the three major economic circles in the province has no obvious effect on the attractiveness of the external transportation of the first city;(3)the spatial structure of the Shandong Province urban agglomeration and the three major economic circles has fractal characteristics;(4)the distribution of expressways in Shandong Province will affect the The spatial structure and form of the urban agglomeration and the three major economic circles in Shandong Province.This paper uses grey relational model analysis to find that the increase of expressway mileage can expand the size of urban population;using linear regression analysis,it is determined that expressway development can expand the area of urban construction land and reduce the area of agricultural land,which affects land use;through qualitative description,it describes Jinan.The layout analysis of the industrial belt near the Ring Expressway illustrates the effect of the expressway on industrial agglomeration.Taking the development of the Jinan Ring Expressway and the development of urban construction area as an example,combined with the distribution of land use and industrial agglomeration around the Ring Expressway,the development of the expressway is analyzed.Constraints on urban spatial form.This paper draws the conclusion from this:expressways can expand the size of the urban population,condense urban industries,enhance the agglomeration of urban agglomerations,and lead the development of urban agglomeration spatial forms,but the restrictive effect on urban spatial forms cannot be ignored;It tends to be saturated.Under the premise of scarcity of land resources,small-scale expansion of expressways cannot increase the attractiveness of external transportation in the first city.In the future development of the transportation system,Shandong Province should change its development thinking and optimize the stock;it should also adjust the transportation structure and vigorously develop transportation modes such as railways.In order to improve the overall efficiency of transportation,in order to build a highquality,intensive modern comprehensive transportation network. |
