Research On Station Spacing Optimization And Station Layout Of Newly-built Regional Railway

In order to meet the rapid demand for residents' travel in the current new urbanization process,the newly-built city railway has become the most suitable rail transit mode for new urbanization.The municipal railway is a public-transit passenger-dedicated railway that serves regular passenger flow between the central city and the peripheral group.It can effectively meet the traffic demand within the city area.However,there are some prominent problems in the booming trend,such as planning.The construction process is slow,the access rate of the newly opened lines is low,the transfer is inconvenient with other modes of transportation,the site layout cannot effectively attract passengers,and the travel speed cannot meet the travel demand.The fundamental reason is that the station spacing and the site layout are improper.In order to improve such problems,how to optimize the spacing of new railway stations is urgently needed to be studied.Firstly,the thesis starts from the multi-level network structure of regional rail transit,analyzes the concept,characteristics,function location and technical characteristics of the city railway.It analyzes and summarizes the development status and station spacing characteristics of the railways at home and abroad,based on the analysis of the factors affecting the station spacing.It is considered that the train running speed and passenger travel time are the most quantifiable factors that directly affect the distance between urban railway stations;then it is proposed to establish a station spacing optimization model based on the train running speed and passenger travel time at least two angles,and select the appropriate constraint target.And the value of the parameters,the highest design speed specified in the specification,the reasonable spacing of the station spacing is usually between 1.4km and 5.0km;and the site layout method is proposed,and the methods and steps for selecting the alternative site are given.The calculation model of coverage and the gray correlation model based on entropy weight method evaluate the site layout scheme,and determine the optimal site layout scheme and station spacing optimization results.Finally,taking the S2 line of Wenzhou city railway as an example,the model is applied according to the station spacing optimization model established in the paper and related planning and design data.It is determined that the optimal average station spacing of the S2 line of Wenzhou city railway is 3323 m,and combined with the scheme layout model and scheme evaluation system,the site layout scheme and station spacing optimization setting result of S2 line are obtained.