摘要
大跨度混凝土桥梁在无支架施工过程中混凝土徐变变形量较大,对桥梁的合拢精度及成桥后的线形有着重要影响.对无支架施工时大跨度混凝土桥梁的徐变机理及徐变量计算方法进行了研究.并以某在建实桥为例,利用两种计算方法,追踪工程进度,对各个施工块的徐变变形量进行了模拟计算,得出了几条对施工监控有意义的结论.
Concrete creeps much during the construction of longspan concrete bridge without bracket,which is significant for the accuration of girder closure and the girder linetype of the finished bridge.The paper studies the creep principle during the construction of longspan concrete bridge without bracket and the method of creeping calculation,taking an actual bridge being constructed for example,uses two calculation methods,traces the engineering progress,simulates the construction of the girder and calculated the creep of every section of girder,and draws several conclusions which have instructive significance to construction and control system.
出处
《兰州铁道学院学报》
2003年第3期70-72,共3页
Journal of Lanzhou Railway University
基金
甘肃省建设厅资助项目(JY2001 2).
