Study On The Selection And Key Technologies Of Multi-level Rail Transit Connection Mode In Metropolitan Area

With the continuous advancement of the construction of China’s metropolitan area in recent years,higher requirements are put forward for the matching rail transit system.Urban rail transit,intercity railway and suburban railway jointly form the rail transit network of Chengdu city circle.Different levels of rail transit have many differences in many aspects.According to the requirements of the integrated development of rail transit,selecting appropriate and perfect connection mode to realize the interconnection of rail transit networks at different levels can give full play to the backbone role of rail transit in the public transport system of metropolitan area,which can not only effectively solve the traffic problems of metropolitan area,but also provide basic guarantee for the economic development of metropolitan area.On the premise of reading a large number of existing documents,combined with the practical results of rail transit connection at home and abroad,firstly,the characteristics of rail transit at different levels are compared and analyzed from multiple angles.Then it deeply studies the two connection modes of transfer and collinear operation,and focuses on their advantages and existing problems.On this basis,it puts forward the selection steps of rail transit connection mode,and establishes the corresponding Fuzzy Interval DEA model.Finally,an example is given to verify the rationality of the connection mode selection method.(1)Expounds the relevant knowledge of multi-level rail transit in metropolitan area(including intercity railway,suburban railway and urban rail transit)as the theoretical basis,and compares the characteristics in function positioning,service scope,system characteristics and operation characteristics;Explain that the connection mode is usually divided into transfer and collinear operation,and clarify their definitions;Introduces the connection schemes of different levels of rail transit in Guangzhou.(2)Special discussion on transfer connection mode: explain the implementation principles of multi-level rail transit transfer connection in metropolitan area,discuss the transfer characteristics between urban rail transit and suburban railway or intercity railway,and especially analyze the key technical problems of transfer connection,including the location selection of transfer hub,transfer mode,etc.In general,the station hall transfer mode is preferred for the connection between urban rail transit and intercity railway,and the same platform transfer mode is preferred for urban rail transit and suburban railway in outer urban areas.(3)Special discussion on the collinear operation,explain the benefits of collinear operation and the main problems existing in the implementation process,and analyze the implementation conditions and technical difficulties of collinear operation between urban rail transit and urban area,urban rail transit and intercity railway in detail from the technical level;This paper discusses the advantages,disadvantages and applicable conditions of the wiring forms of ordinary stations and connecting stations on the line of collinear operation,and draws typical illustrations;The applicability and characteristics of the three transportation organization schemes of collinear operation are summarized.(4)Expounds the basic criteria for the decision-making of the connection mode,summarizes the relevant factors affecting the connection mode in all aspects,screens through the correlation analysis,and determines the evaluation index system;The corresponding Fuzzy Interval DEA model is constructed,and the effectiveness criteria of the solution results are listed;Put forward the selection steps of connection mode: when the implementation conditions of collinear operation cannot be met,or the reconstruction of existing lines is difficult or the cost is high,transfer connection shall be adopted directly;When the implementation conditions of collinear operation are met and the connecting lines are in the same direction,its effectiveness is further analyzed by Fuzzy Interval DEA model.(5)Taking the connection between urban rail transit and suburban railway,urban rail transit and intercity railway as examples,the solution results are analyzed by using the connection mode selection method and model,and the corresponding feasibility suggestions are put forward to verify the rationality and effectiveness of the connection mode selection method.