Research On The Influence Of High-speed Railway Development On The Strength Of Economic Ties In Beijing-Tianjin-Hebei Region

Urban agglomeration is the main achievement of regional economic integration in China,and regional economic integration is related to the development of national economy,which makes the development of regional economy and urban agglomeration become a hot issue in academic circles.Up to now,China has formed 18 urban agglomerations such as Chengdu-Chongqing urban agglomeration,Guanzhong Plain urban agglomeration and middle Yangtze River urban agglomeration represented by three mature urban agglomerations:Yangtze River Delta,Pearl River Delta and Beijing-Tianjin-Hebei agglomeration.there is no doubt that this will play a vital role in China's economic take-off in the future.Nowadays,the opening of high-speed railway has been an important factor to promote the development of urban agglomeration,whether it is the study of regional economic connection strength based on gravity model,or the study of regional economic integration based on the development of high-speed rail has made a certain contribution to the development of regional economics and regional economy.Beijing-Tianjin Intercity Railway,the first high-speed railway in China,was officially opened to traffic on August 1,2008,which marks that China has officially entered the era of high-speed rail.In the following 10 years,China's high-speed railway has developed unprecedentedly.According to official data,by the end of 2019,the mileage of China's high-speed railway has reached 35000 km,accounting for more than 2% of the world's total mileage,making it the country with the longest high-speed rail mileage,the highest transport density and the most complex network operation scene in the world.Whether it is the Yangtze River Delta urban agglomeration,the Pearl River Delta urban agglomeration,or the Beijing-Tianjin-Hebei urban agglomeration,the planning,design and opening of high-speed railway play a catalytic role in the integration of the region.The Beijing-Tianjin-Hebei region is China's "capital economic circle",including two municipalities directly under the Central Government in Beijing and Tianjin.And 11prefecture-level cities in Hebei Province,including Baoding,Tangshan,Langfang,Shijiazhuang,Handan,Qinhuangdao,Zhangjiakou,Chengde,Cangzhou,Xingtai and Hengshui.Among them,Beijing,Tianjin,Baoding and Langfang are the core functional areas of the central region,and the Baoding area of Beijing and Tianjin will take the lead in linkage.Beijing,Tianjin and Hebei are located in Northeast Asia and the center of China's Bohai Sea.They are the largest and most dynamic economic zones in northern China,and they have attracted more and more attention from China and even the world.This paper compares and analyzes the economic data and population data of 13 cities in Beijing-Tianjin-Hebei region from 2017 to 2019,as well as the time spent by ordinary through trains and high-speed trains between cities,and uses the gravity model.The purpose of this paper is to measure whether the opening of high-speed railway has an impact on the economic development of Beijing-Tianjin-Hebei region from three aspects: traffic accessibility,the intensity of economic ties between cities and the degree of economic membership between cities,and draw the following conclusions:(1)with the development of high-speed railway,the accessibility level of 11 major cities in Beijing-Tianjin-Hebei region has been significantly improved;due to the spatial differences in geographical location and regional differences in railway line grades,the completion and commissioning of the high-speed railway and the time for the transformation and upgrading of the original railway lines have led to obvious differences in the accessibility level of different cities in Beijing-Tianjin-Hebei region in time and region.(2)with the development of high-speed railway,the time distance between cities in Beijing-Tianjin-Hebei region is shortened,and the intensity of economic ties is obviously improved as a whole,due to the regional differences between the level of economic development and the level of railway accessibility,the change of the intensity of economic ties is different in time and region.In space,the intensity of economic ties is still a "center-periphery" spatial distribution with Beijing and Tianjin as the center and gradually decreasing to the remote areas.(3)with the development of high-speed railway,the degree of economic membership of Beijing to 10 other cities in Beijing-Tianjin-Hebei region has changed locally.Cities with high economic membership may have reduced economic membership with the emergence of high-speed railway.Cities with low economic membership may have increased economic membership with the emergence of high-speed railway,but Beijing's economic membership to Tianjin is still the first.Beijing still ranks last in terms of economic affiliation to Qinhuangdao.Taking the Beijing-Tianjin-Hebei urban agglomeration as the research object,this paper tries to use the urban gravity model to study the influence of ordinary railway and high-speed railway on the intensity of economic ties in Beijing-Tianjin-Hebei region,and compares the two research results.to provide some reference suggestions for promoting the construction of high-speed railway and regional economic development.From an overall point of view,the impact of high-speed railway on regional economic development mainly includes promoting the flow of factors of production,the growth rate of local economic development,optimizing the industrial layout of regional cities,and so on.With the improvement of the level of regional economic development,the economic agglomeration function and diffusion function of each region will gradually promote the economic development of the surrounding region.