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| Research on the Synthetic Resin Sleeper Track Structure on Large Span Steel Bridge in High Speed Railway#br# |
China Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan 610031, China
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Abstract Abstract：Research purposes：In order to study the feasibility on the application of the synthetic resin sleeper on the large span steel bridge in high-speed railway, the finite element method is used to establish the track model with synthetic resin sleeper. According to the requirements of the rail's displacement, stress, bending moment, installation space for fasteners, and connection space for sleepers and bridge, the height, width, length, bearing spacing and cushioning stiffness of the synthetic resin sleeper are analyzed, the reasonable parameter values are proposed for the synthetic resin sleeper installed on the large span steel bridge in high-speed railway.
Research conclusions：The sleeper width depends primarily on its economy and installation space for fasteners, 200~300 mm width can meet the track's mechanical requirements. The sleeper height has a great effect on the sleeper bending stress. In order to ensure the sleeper reliability, it is suggested to take a 210 mm height sleeper or more. The lateral space between fulcrums of the resin sleeper has a great effect on track stiffness, sleeper bending moment, and dynamic gauge enlargement, so the fulcrums should be as close as possible to the rail centerline in order to avoid sleeper fulcrum force in the overhanging portion between the two fulcrums. The cushion stiffness has a great effect on the track vertical displacement. In order to control the track's vertical displacement, the cushion stiffness should take 750 kN/mm or above. The research results can be used in structural design of light rail on the large span bridge of high speed railway, to provide a reference for similar projects.
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