Research On Distribution Design Of Regional Rail Transit Stations Under Cross Line Conditions

At present,the transportation network generated by the combination of different rail transit systems has gradually become the main force of urban agglomeration or metropolitan area,regional coordinated development has become a new trend,and interconnection operation has become a new goal.Line interconnection is the premise of cross line operation.As the key fulcrum of the line,the station should support the cross line operation organization mode with more scientific and reasonable wiring conditions.Taking the wiring design at the cross line station as the core,this paper studies the station wiring design,station capacity calculation and wiring comprehensive evaluation method,so as to provide design basis for realizing flexible interconnection and networking at present and in the future.The main research work of this paper is summarized as follows:(1)The requirements of train operation organization under cross line conditions are analyzed.From the perspectives of the demand of passenger flow,operation frequency,signal system and train end changing and reversing,this paper analyzes the necessity of cross line operation,feasibility of cross line operation and the influence of cross line operation characteristics on station wiring design.(2)Facing the complex and diverse cross line operation requirements,wiring schemes at cross line station under the typical operation requirements are designed.Firstly,from the perspectives of the influencing factors such as station structure positioning,operation organization mode,project implementation conditions and operation reliability,this paper analyzes the wiring design requirements of station crossover,turn-back line and arriving-departure line;Secondly,facing the typical operation requirements of the cross line station,this paper puts forward 14 wiring design schemes of the cross line station aiming at the four station types of the same signal X-type station,the same signal Y-type station,the cross signal X-type station and the cross signal Y-type station,and analyzes the wiring function and adaptability of each scheme.(3)Facing the complex operation characteristics of cross line stations,the capacity calculation model of regional rail transit stations under cross line conditions is constructed.Firstly,considering the characteristics and difficulties of larger scale of cross line station wiring,more complex operation organization and more obvious streamline conflict,this paper expounds the limitations of graphical analysis method,and puts forward the idea of accurately calculating station capacity by using optimization model.Secondly,the station operation routes and route space-time occupation of different types of trains in cross line stations are finely portrayed and described to lay the foundation for the construction of the model;Then,taking the minimum period of the train set as the objective function,the calculation model of cross line station capacity based on the optimization of train station operation route is constructed,and Gurobi is called to solve the model;Finally,the capacity of stations with the same signal and cross signal is calculated respectively,and compared with the traditional graphical analysis method to verify the effectiveness of the model.(4)A comprehensive evaluation method of station wiring under cross line conditions is proposed.Firstly,from the aspects of station capacity,flexibility and reliability of station operation organization and investment cost of station construction,the evaluation index system of cross line station wiring design is constructed;Secondly,the weight of evaluation indexes at all levels is determined based on analytic hierarchy process;Then,based on the fuzzy analysis method,the quantitative evaluation method of cross line station wiring design is designed.This method can be used not only to evaluate the rationality of a single wiring design scheme,but also to quantitatively compare and select multiple wiring design schemes.(5)Based on practical cases,the wiring design,capacity checking and evaluation of cross line stations under different needs are carried out.Taking the same signal Y-type station and cross signal X-type station on certain two lines as examples,based on the analysis of passenger flow composition and operation organization requirements,the optional wiring scheme is determined,and the proposed wiring scheme and corresponding operation organization mode are given with capacity checking and comprehensive evaluation,.Further,the sensitivity analysis for the standards of train dwell time,cross line train operation frequency and signal switching time is carried out,and the influence of different factors on wiring design and station capacity is summarized.There are 77 figures,31 tables and 60 references.