道岔选型对市域铁路通过能力的影响研究OA

Some stations on suburban railways are equipped with turnouts.To investigate the impact of turnout type selection on line carrying capacity under express and local train overtaking mode,station throat area length,train motion state,train inter-station running time,and train headway were taken as intermediate variables,and the calculation method of line carrying capacity was specified;the impact trend of turnout type selection on line carrying capacity through intermediate variables was analyzed.By considering No.9 and No.12 turnouts as cases,the turnout types meeting requirements and having comparative advantages were screened station by station,and 16 turnout schemes were combined and simulated.The results show that the turnout type selection causes a 3.26%change in line carrying capacity with an adjustment amplitude of 213 m in total length of throat area(accounting for 0.46%of the total line length),but there is no purely positive correlation between the total length of throat area and line carrying capacity.Under the express and local train mode,adjusting the turnout scheme is an effective method to improve line carrying capacity.The capacity is directly related to partial train inter-station running time and train headways.Only by adjusting the turnout types that directly affect these factors to reduce the inter-station running time difference between express and local trains and the train headway can the capacity be improved.