Research On The Capacity Strengthening Scheme Of Handan-Huanghua Railway Based On Tracking Trains

As a single-line freight railway connecting the cities in Hebei Province and Huanghua Port,the Handan-Huanghua Railway undertakes a large number of freight business in southern Hebei.In the case of continuous annual growth of freight traffic,the line capacity is gradually saturated.This thesis takes the research on the expansion scheme of Handan-Huanghua Railway as the theme,and considers the calculation of freight train travel speed.The main research results and conclusions are as follows :(1)On the basis of sorting out and reading the relevant literature of single-track railway,this thesis understands all kinds of capacity expansion measures applicable to single-track railway,and analyzes the equipment,line conditions and train travel speed of single-track railway when tracking trains.(2)The existing transportation organization of Handan-Huanghua Railway is analyzed.Combing its existing lines and sections,based on the analysis of its freight transportation direction,train marshalling,train diagram and other contents,the transportation organization mode and the existing carrying capacity of the section are analyzed and calculated as the basis for analyzing its capacity expansion measures and effects.(3)The applicable expansion measures of Handan-Huanghua Railway are analyzed,and the applicable blocking mode and tracking time are determined.Under the understanding of the needs of single-track railway tracking train equipment,the current situation of Handan-Huanghua railway transportation organization and the passing capacity,it is considered that Handan-Huanghua railway can run tracking trains to improve the passing capacity.According to the working characteristics of different blocking modes and the equipment of Handan-Huanghua Railway,the blocking mode and tracking interval time that can be adopted by Handan-Huanghua Railway are confirmed.(4)Analyze the organizational characteristics of single track railway transportation when running tracking trains.Mainly analyzed the requirements for the number of station wiring when running tracking trains,and confirmed the conditions for the number of station wiring when running tracking trains by analyzing the characteristics of train intersections in the paired tracking operation diagram;Analyzed the stopping time of different types of trains within the time zone for running tracking trains,and based on the characteristics of single line section running chart layout,used Python program to write a single line section running chart layout program and a calculation and layout program for stopping time of different types of trains in single line section,which served as the basis for calculating travel speed when running tracking trains in different sections.(5)The capacity expansion scheme of tracking train in Jize-Bohaixi section of Handan-Huanghua through main line is calculated and analyzed.The feasible capacity expansion scheme of Handan-Huanghua Railway is summarized : when the number of trains in the tracking train group is 2 and the tracking coefficient is 0.67 and above,it can meet the current capacity needs and minimize the engineering quantity.The train laying scheme when the train travels at the fastest speed is determined,which can be used as the basis for the laying of the train diagram.