| Urban agglomeration is the highest form of urban development to mature stage,and its level of development represents the comprehensive strength of a country.Therefore,the world attaches great importance to the development of urban agglomerations,China is also actively promoting the development of the city group,forming a different size of the urban agglomeration.Beijing-Tianjin-Hebei urban agglomeration as one of China’s three major urban agglomerations,its development has been the country’s attention.The spatial structure of the urban agglomeration of various material elements and the allocation of space performance,reasonable spatial structure can promote the development of urban agglomerations.Therefore,this paper studies the urban agglomeration of Beijing-Tianjin-Hebei from the perspective of spatial structure,which is of great significance to promote the development of Beijing-Tianjin-Hebei urban agglomeration.Firstly,the research on the spatial structure of urban agglomeration,the spatial structure of urban agglomeration and its related theory are introduced.Secondly,the basic situation of Beijing-Tianjin-Hebei urban agglomeration is introduced from the aspects of natural geographical environment,population,land area and administrative divisions;The present situation of economic development of Beijing-Tianjin-Hebei urban agglomeration is analyzed from domestic GDP and industrial structure.Based on the analysis of the total investment of fixed assets,the total retail sales of social consumer goods and the balance of financial institutions at the end of the year,the paper analyzes the macroeconomic environment of Beijing-Tianjin-Hebei urban agglomeration;summed up the Beijing-Tianjin-Hebei urban agglomeration in the development of the problem.Thirdly,it analyzes the characteristics of the spatial structure of the urban agglomeration of Beijing,Tianjin and Hebei from the three aspects of urban agglomeration scale structure,function structure and economic connection structure.Based on the resident population of each city,the fractal model is used to analyze the characteristics of the hierarchical structure of the urban agglomeration.Based on the dataof the employees in each city and city in Beijing and Tianjin,the functional structure of the urban agglomeration is analyzed by the location method and the Nelson statistical method.Based on the 24 indicators and the principal component analysis method is used to calculate the comprehensive quality of each city.The distance in the gravitational model is improved by using the arithmetic mean of the high iron time distance,the ordinary railway time distance and the road time distance.The gravitational model analyzes the structural characteristics of the spatial economic link of the Beijing-Tianjin-Hebei urban agglomeration.Finally,the paper puts forward the idea of optimization from three aspects: the scale structure,the function structure and the economic structure of the Beijing-Tianjin-Hebei urban agglomeration,and puts forward the suggestion of the the spatial structure optimization based on the existing problems of the beijing-tianjin-hebei urban agglomeration. |
