Research On The Evaluation Of The Reasonable Scale And Layout For Metropolitan Railway Network

Metropolitan area is an inevitable stage for cities,and it is important to embody competitiveness for a country or region.The rail system as the main driving force to guide and promote social and economic sustainable,rapid and coordinated development of the metropolitan area,plays a role in promoting the formation and development of the metropolitan area.In order to meet with the traffic demand in the metropolitan area effectively, and to avoid the waste of construction sources and railway facilities, it is required to make scientific and systematic railway network planning.With the development of the social economy and communications & transportation.Traffic demand on railway network system improves constantly.Meanwhile,a lot of problems concerning to railway planning and construction in the past appears, so it is especially urgent to study railway network planning theory deeply.Metropolitan Araes of Jing-Jin-Ji Metropolitan is selected as an example,the dissertation does some research on rail scale,layout optimization and railway network evaluation.The main research activities include:1. The reasonable scale of the metropolitan rail network has been studied.The dissertation analyzes the factors affecting the scale of the Metropolitan Railway Network and predicts the scale of the railway network.2. Based on the predicted scale of the railway network,the layout of the metropolitan rail network is studied.According to node important degree and gravity mode.The dissertation assigns the theoretical length of the railway to the metropolitan area and adjusts the railway networks. Finally,combining the planning and entire metropolitan railway traffic in Jing-Jin-Ji Metropolitan,considering the new line construction,alteration of the existing lines and the improvement of technical equipment lines,this article gives appropriate proposal on the metropolitan rail network in the planning and construction.3. In the section of metropolitan railway network evaluation,a new model called weighted gray correlation analysis method based on DEA(Data Envelopment Analysis)was presented to evaluate railway network system in metropolitan area.It gives a comprehensive evaluation of the metropolitan railway network from spatial and time dimensions.