Research on CWR Track Design Scheme for Hongshui River Super Long Bridge of Huangtong-Baise Railway
Based on the CWR design and operation on large-span and deck-type arch bridges of typical railways in China,this paper establishes a three dimensional analysis model for girder-track synergy of deck-type arch bridge for Hongshui River Super Long Bridge of the New Huangtong-Baise Railway based on the principle of girder-track interaction.It also proposes the CWR design scheme on bridge.The study results indicate the scheme that uses constant resistance fasteners without rail expansion joints on the Hongshui River Super Long Bridge fails to meet the strength requirements for rails.Installation of rail expansion joints within the arch ring shows little improvement in reducing additional bending forces and braking forces,also failing to meet the rail strength requirements.However,when rail expansion joints are placed outside the arch ring,both the additional bending force and braking force are significantly reduced.Consequently,the strength,stability,and rail breakage values of CWR track on bridge meet the design requirements.
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