摘要
宜兴荆邑大桥主桥跨径173m,桥宽58.5m/51m。主桥桥塔结构体系为双套拱塔结构。由于其独特的结构造型及现场施工条件的限制,拱桥安装采取在桥面上平面拼装,同步竖转提升,先利用临时塔架竖转提升主塔,然后利用安装好的主塔作为承重结构,同步竖转提升安装副塔的安装施工工艺。通过对临时结构的设计提出较高要求,保证提升竖转过程中的同步控制精度。同时通过采取有效措施,防止由于竖转的角度过大而导致倾覆的危险。
The master bridge of Jingyi Bridge in Yixing is 173 meters in span diameter,58.5 meters or 51 meters in bridge width.Due to its unique structure model and restriction of on-site construction condition,arch bridge is installed by patchwork parallel over the bridge surface,synchronized vertically rotating elevation.First step is vertically to elevate the master tower by means of a makeshift tower stand,and second step is by means of the construction technology,which can synchronized vertically elevate and install the slave tower,it is done on the load-bearing structure based on the installed master tower.By strict requirements on the design of the makeshift structure,the precision synchronized control is ensured in the process of vertically elevation.In the meanwhile,the risk of capsize is prevented by effective measures if the vertically rotating angel is too wide.
出处
《施工技术》
CAS
北大核心
2010年第2期51-53,共3页
Construction Technology
关键词
桥梁工程
液压提升
同步控制
桥塔
竖转
bridge engineering
hydraulic elevation
synchronized control
bridge tower
vertically rotating
