明州大桥中跨加劲梁安装技术

宁波明州大桥为主跨450m中承式钢箱系杆提篮拱桥,居同类型桥梁世界前列。中跨加劲梁吊装采用大型缆索系统,南北岸对称施工。在加劲梁吊装过程中,与扣锚索拆除、吊杆安装、系杆索张拉穿插进行,相互影响。吊装过程须全程监控拱肋线形与拱脚水平推力,并以实时测量数据修正下阶段施工指令。该文介绍明州大桥主桥中跨加劲梁桥面吊装的具体施工过程,并对明州大桥全桥线形调整与控制的方法进行探讨。

Reinforced Beam Erection Technique of Middle Span of Mingzhou Bridge

Ningbo Mingzhou Bridge is the 450-m main span half through steel box bowstring X-arch bridge,and is the top-ranked in the same bridge world.The reinforced beam of the middle span is hoisted and constructed by the large cable system symmetrically at south and north banks.The hoisting process of reinforced beam is interweaved and effected each other with the dismantlement of fastening anchor cable,erection of suspender and stretching of bowstring cable.The arch rib linearity and the arch feet horizontal thrus...