Design of unballasted track bridges on Beijing--Tianjin intercity railway

摘要

Beijing--Tianjin intercity railway is the first newly-built passenger dedicated line with operating speed of 350 km/h in our country. During design, new ideas of bridge construction were carried out to ensure the requirements of safety, comfort and stability of the train under high-speed condition. At the same time, concepts of environmental adaptability, service to transportation and comprehensive benefits were observed. On the whole line, long-bridge schemes were adopted and the most advanced technologies of unballasted track were utilized on bridges, the length of which accounts for 87.7 % of the total line. The success of design and construction of the bridges on this rail has accu- mulated valuable experience for high-speed railway construction on a large scale in the future, and made it a marking, demonstrating, and model project to follow.