摘要
新建福州至厦门高速铁路设计速度350km/h,双线、无砟轨道。线路全长277.5km,其中桥梁总长181.1km,桥梁占比65%。沿线地形、水文、气象、地质等自然环境复杂,针对大跨度桥梁徐变、结构刚度、结构耐久性、大跨度无砟轨道桥梁、施工安全、桥梁景观等设计重点进行研究。在满足铁路使用功能的前提下,充分体现安全适用、经济美观的设计特点,合理选择桥式方案,采用了主跨432m高低塔四线混合梁斜拉桥、主跨400m结合梁斜拉桥、3×70m整体式连续刚构桥等多种创新桥梁结构;开展了海上40m大跨度简支梁预制架设建造技术、独塔混凝土斜拉桥裸塔转体施工技术、大吨位高速铁路转体施工技术等研究应用。
The newly-built Fuzhou-Xiamen High-speed Railway,which is a double-track ballastless railway line with design speed of 350 km/h,secures a total length of 277.5 km,with bridges accounting for 65%of the whole line,reaching up to 181.1 km.The natural environment are quite challenging for the construction of those bridges,mainly the topographical,hydrological,meteorological and geological conditions.To find proper solutions,the paramount issues in design were studied,in cluding the creep,rigidity and durability of long-span bridges as well as the behaviors,construction safety and landscaping of long-span ballastless bridges.Three innovative types of bridges are adopted,including the four-track hybrid girder cable-stayed bridge of 432 m main span and with pylon height difference,the composite girder cable-stayed bridge of 400 m main span and the integral continuous rigid-frame bridge with spans of 3×70 m,which balance the functionality,economy and aesthetics.A series of construction techniques were studied and implemented,which resolved the complexities in t he prefabrication and erection of offshore 40 m simply-supported spans,rotation construction of the free-standing pylon of the single-pylon concrete cable-stayed bridge,and the rotation of the large tonnage high-speed railway.
作者
王德志
张红旭
WANG De-zhi;ZHANG Hong-xu(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;Hubei Provincial Engineering Research Center of Rail Transit Smart Bridge Technology,Wuhan 430063,China;China Railway Economic and Planning Research Institute,Beijing 100038,China)
出处
《世界桥梁》
北大核心
2020年第S01期1-6,共6页
World Bridges
基金
中国国家铁路集团有限公司科技研究计划重大课题(K2018G017)
中铁第四勘察设计院集团有限公司科技研发项目(2018K002)。
关键词
高速铁路桥
斜拉桥
连续刚构
简支梁
徐变
刚度
无砟轨道
桥梁设计
high-speed railway bridge
cable-stayed bridge
continuous rigid frame
simply-supported girder
creep
stiffness
ballastless track
bridge design
