摘要
丰都长江二桥主桥为全长1 282 m的双塔双索面五跨连续钢箱梁斜拉桥,采用半漂浮结构体系,跨径布置为(70.5+215.5+680+245.5+70.5)m。该桥无索梁段长度为43 m,承台距离钢箱梁底高度约70 m,若采用传统的落地支架法施工,则施工工期较长且费用较高。结合项目的特点确定采用桥面吊机非对称吊装的方法,此方法施工时,会产生较大的不平衡荷载,不平衡荷载通过设置的塔梁临时固结来抵抗。
The main bridge of Fengdu Second Yangtze River Bridge is a five-span continuous steel box girder cable-stayed bridge with a span of 1 282 m and double pylons and double cable-planes,the semi-floating structure is adopted,and the span is arranged as( 70. 5 + 215. 5 + 680 + 245. 5 + 70. 5) m. The cable free section length of the bridge is 43 m,and the height from the steel box girder bottom to the pile cap is about70 m. If the traditional ground support method is adopted,the construction period is longer and the cost is higher. According to the characteristics of the project,the bridge deck crane asymmetric hoisting method is adopted. This method will produce larger unbalanced load,which will be resisted by setting the temporary consolidation of pylon beam in construction.
出处
《公路交通科技》
CAS
CSCD
北大核心
2018年第S1期105-109,共5页
Journal of Highway and Transportation Research and Development
关键词
桥梁工程
非对称吊装
方案比选分析
塔梁临时固结[1]
不平衡荷载
bridge construction
asymmetric hoisting
scheme comparison analysis
temporary consolidation of pylon beam
unbalanced load
