高墩大跨度连续刚构桥的设计探讨  

Discussion on Design of High-Pier Large-Span Continuous Rigid Frame Bridge

作　　者：余科辉 YU Ke-hui(CCCC First Highway Consultants Co.,Ltd.,Xi’an,Shanxi 710065,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安710065

出　　处：《黑龙江交通科技》2020年第12期70-72,共3页Communications Science and Technology Heilongjiang

摘　　要：针对高墩大跨度连续刚构桥箱梁开裂、跨中下挠、高墩刚度不足等问题,通过总结以往工程经验及教训,以南醒河特大桥为例,探讨高墩大跨度连续刚构桥的设计对策,主要结论如下:(1)确定合理的箱梁尺寸;(2)设置合理的腹板下弯束;(3)竖向预应力采用低回缩二次张拉锚固系统;(4)加强设计应力控制;(5)加强细节构造设计;(6)以风振舒适度控制高墩横向刚度。Ai ming at the problems of box girder cracking,mid-span deflection,and insufficient high-pier stiffness of high-pier long-span continuous rigid frame bridges,by summarizing past engineering experience and lessons,taking Nanxinghe Extra Large Bridge as an example,discussion on the design countermeasures of high-pier long-span continuous rigid frame bridges,the main conclusions are as follows:(1)Deter mine reasonable box girder dimensions;(2)Set up reasonable web bending beams;(3)Use low-retraction secondary tension anchor system for vertical prestress;(4)Strengthen design stress control;(5)Strengthen the detailed structural design;(6)Control the lateral stiffness of high piers with wind vibration comfort.

关 键 词：高墩大跨度连续刚构 箱梁开裂 跨中下挠 高墩刚度不足 设计对策 

分 类 号：U442[建筑科学—桥梁与隧道工程]