南浔85 m系杆拱桥钢拱架施工技术

以浙江湖州市南浔新桥为例介绍软土地基中承式系杆拱桥的钢拱架节段组拼、拱架成型及安装等施工工艺。在钢拱架的安装过程中,采用先地面节段组拼、临时支架拼装成拱,然后用大型浮吊每两榀钢拱架吊装就位、利用地形用万能杆件支架代替缆风临时固定的施工技术是成功的。

Construction Techniques for the Steel Arches of the 85-m Tied Arch Bridge at Nanxun

With the new arch bridge at Nanxun of Huzhou, Zhejiang as a practical example, the paper outlines the construction processes related to the assembly of steel arch sections for the through tied arch bridge on soft soil foundation, and the forming and the erection of steel arches, etc. When the arch bridge was erected, arch sections were first assembled on the ground, the arch sections were then put together into an arch with the help of temporary supports, and the steel arches were hoisted in pairs in place with the help of a large floating crane. The local landform was also made use of by means of supports made up of universal members instead of anti-wind cables. Practice has proved the technique is successful.