Influence Of Railway Station Distribution On Carrying Capacity In Complex And Dangerous Mountainous Areas

With the rapid development of social economy,the demand for natural resources in mountainous areas is increasing rapidly.China is stepping up the construction of Railways in complex and dangerous mountainous areas with a speed of 200 km/h and above,which puts forward higher and higher requirements for the transport capacity of the railway in mountainous areas.However,there are many kinds of trains in this kind of railway,with large speed difference,and the distribution of stations is closely related to the carrying capacity.At present,there is a lack of theory and analysis method about the influence of station distribution on carrying capacity in mountainous areas.This thesis systematically studies the influence of station distribution on carrying capacity in complex and dangerous mountainous areas under a certain transportation organization mode.The main work of this thesis includes:(1)This thesis points out the definition of railway in complex and dangerous mountainous areas,lists the existing typical railways,summarizes the operation rules of such railways.This thesis analyzes the distribution status of railway stations in complex and dangerous mountainous areas,introduces the calculation method of carrying capacity adopted in this thesis,and points out the research direction and purpose of this thesis.(2)This thesis analyzes the characteristics of several operation organization methods,such as the traditional mixed operation of passenger and freight trains,the operation of passenger and freight trains in different periods and the tracking operation of passenger and freight trains in groups,and puts forward the characteristics and adaptability of each operation mode.According to the characteristics of railway operation in complex and dangerous mountainous areas,this thesis puts forward the suggestion that the railway in mountainous areas should adopt the transportation organization mode of incomplete time division of passenger and freight lines.(3)This thesis analyzes the change of overtaking structure under different running structures and different station spacing during the departure time of freight trains and the centralized departure time of multiple units,analyzes the deduction coefficient of low-speed trains in detail,and calculates and analyzes the influence law of station spacing on carrying capacity according to the deduction coefficient formula combined with examples.(4)On the basis of the research on the influence of balanced station spacing on carrying capacity,this thesis analyzes the deduction coefficient of single and multiple low-speed trains under the condition of unbalanced station spacing in EMU centralized departure period.The degree of balance is described by the balance of station distribution and the order of station spacing,and a simple algorithm is designed to analyze the influence of station distribution balance on carrying capacity.For the departure period of freight trains,the thesis describes the degree of equilibrium with specific layout structure,and summarizes the variation of deduction coefficient of passenger trains with different equilibrium through a large number of layout diagrams to analyze the influence of station distribution equilibrium on carrying capacity.(5)Taking Bomi-Linzhi section of Sichuan Tibet Railway as an example,the deduction coefficient and carrying capacity of design station spacing and different station spacing are calculated respectively,and the influence law of the previous thesis is verified.According to the calculation results of carrying capacity,the thesis puts forward the suggestions of station distribution adjustment in this section,and calculates the improvement of carrying capacity.