铁道科学与工程学报Issue(1)：113-118,6.
刚构-连续组合梁桥主梁合龙关键技术
Study on key technology of the main girder closure of rigid frame -continuous co mbination beam bridge
陈淮 1陈鹏飞 1李杰1
作者信息
- 1. 郑州大学 土木工程学院，河南 郑州 450001
- 折叠
摘要
Abstract
Based on the connecting line project of long -span prestressed concrete rigid frame -continuous com-bination beam bridge between the south -to -north water diversion and Zhengzhou to Shaolin highway road,the finite element model of construction process was established by Midas/Civil,to simulate the key technology of main girder closure sequence,removal time of full space supports of the cast -in -place beam of the side span, and jacking force of middle span closure with numerical simulation technology.The calculation results show that it is beneficial to the bridge alignment and lateral structure stress to close the side span girder first,then remove the full space supports of casting side -span girder,and close the middle span girder last.The formula of rela-tionship between jacking force and temperature change was worked out through fitting results to optimize the de-sign jacking force,and the two factors have linear relationship with horizontal displacement along the bridge in a certain range.The solutions in this paper can guide the girder closure of rigid frame -continuous combination bridge construction and have reference significance to the construction of similar bridges.关键词
刚构 -连续组合梁桥/主梁合龙顺序/支架拆除时机/中跨合龙顶推力Key words
rigid frame -continuous combination beam bridge/closure sequence of main girder/removal time of supports/jacking force of middle span分类
交通工程引用本文复制引用
陈淮,陈鹏飞,李杰..刚构-连续组合梁桥主梁合龙关键技术[J].铁道科学与工程学报,2015,(1):113-118,6.
