Design of No.12 Diamond Crossing Turnout Suitable for Standard-gauge and Narrow-gauge Railways
Based on existing technical theories and standards,and as per the requirements of Lagos-Ibadan Railway Project in Nigeria,this paper carries out the design of No.12 diamond crossing turnout suitable for standard-gauge and narrow-gauge railways.The standard-gauge line adopts Chinese standards with a rail type of 60 kg/m rail,while the narrow-gauge line adopts British standards with a rail type of 80R rail.The crossing angle between the two lines is 4°45′49″.This paper introduces the selection of design parameters for No.12 diamond crossing turnout and its technical characteristics,and analyzes the movable-point obtuse frog,acute frog,guard rail,fastening system and rail joint of the turnout.Considering the connection between 60 kg/m rail and 80R rail,this paper adopts the combination of 60 kg/m-50 kg/m compromise rail and compromise joint bar for the first time.It also verifies the joint bar by finite element method.According to the simulation analysis,the deflection of the rail is greater than that of the joint bar under vertical load,and the strength and deflection of the joint bar under various static load conditions can meet the design requirements.
diamond crossing turnoutstandard-gaugenarrow-gaugefrogfinite element simulationrailfastening system
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