The new Nantong-Ningbo High-speed Railway aims to connect with Jiaxingnan Station,with branch lines connecting to Shanghai-Kunming High-speed Railway yard to facilitate links between Shanghai-Ningbo and Suzhou-Hangzhou directions,utilizing the reserved conditions of Shanghai-Kunming High-speed Railway to insert turnouts.However,the straight section length between the new and existing turnouts is 15 m,which falls short of the specifications outlined in the Code for Design of High-speed Railway.To explore the feasibility of this design,a simulation analysis was conducted from the perspectives of vehicle passing performance and temperature forces of continuously welded rail turnouts.The findings revealed that:(1)Under the condition of a 15 m intermediate straight section between turnouts,all dynamic performance indicators meet the code requirements.(2)In the temperature environment of the Jiaxing region,the temperature forces of continuously welded rail tracks are minimally affected by the intermediate straight section length between turnouts,with all static performance indicators satisfying code requirements.(3)Considering factors such as engineering investment,impact on existing line operations,and engineering rationality,the layout of the throat area can be optimized,adopting 15 m as the design standard for the intermediate straight section length between turnouts.The study outcomes can serve as a reference for other projects and contribute insights for revisions of related codes.
junctionintermediate straight section between turnoutsfinite element analysisvehicle passing performancetemperature forces of continuously welded rail turnouts
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