With the increase of the urban population and people's travelling frequency,the demands of shortening the running interval and improving the subway's transport capacity are put forward in urban rail transit in China.Shortening interval of departure time and running interval means that the turn-back capacity of trains has to be promoted,which means the permissible side track velocity on turnout has to be increased.In the research of capacity improvement of the existing lines of Beijing,permissible maximum velocity on side direction was studied based on two types of commony-used turnouts (60kg/m rail No.9 simple turnout).On the premise of ensuring running safety,the research suggested the maximum permissible velocity on side direction and put forward the precautions and requirements in the process of engineering application,and provides reference for permissible maximum velocity on side direction of the turnout for improving the transport capacity of lines in the future.
turnoutadmissible side track velocitytraffic capacityBeijing metro
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NSTL
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