高速铁路标准梁式桥技术创新与发展

我国高速铁路桥梁约占线路总长55%,主要以预应力混凝土简支箱梁和现浇预应力混凝土连续箱梁为主,其中标准跨度简支梁占全部桥梁长度的90%以上。经过多年的技术创新和积累,我国已经构建了标准梁式桥成套技术体系。回顾了我国铁路预应力混凝土梁的发展历程,对高速铁路桥梁技术参数体系、刚度和变形控制设计技术、制运架建造技术等进行总结和思考。基于高速铁路标准梁式桥应用经验的积累和信息化、智能化铁路建设需求,分析了未来的发展方向,提出既有标准梁优化及应用智能建造、运维技术的建议。

Technological Innovation and Development of High Speed Railway Standard Girder Bridge

In China,bridges account for 55% of high speed railway lines,and most of them are prestressed concrete simply supported box girder bridges and cast-in-site continuous box girder bridges.The standard simply supported bridges account for 90% of all bridges.China has constructed a set of technology system of standard girder bridges through years of technological innovation and accumulation.The development history of Chinese prestressed concrete bridge was reviewed.The design parameter system,design technologies of rigidity and deformation controlling and construction technology of prefabrication and erection of high speed railway bridges were summarized.Based on the increasing application experience of standard girder bridges and the need for intelligentized and informationalized construction of railways,the development directions of standard girder bridges is analyzed.Also,optimization of existing standard girders,intelligent construction and maintenance are suggested.