苏北通榆河上混凝土系杆拱桥的预制装配施工

Prefabrication and Assembly Construction for Concrete Tied Arch Bridges over Tongyu River

在苏北通榆河沿线新建的数十座公路桥中,有十余座采用了混凝土系杆拱结构。在施工时,对系杆、拱肋等构件先在工厂预制,然后在现场按一定程序安装拼接,并施加预应力,形成内部超静定、外部静定的系杆拱结构体系。

There are several dozens highway bridges newly built across Tongyu River in the north area of Jiangsu Province. More than a dozen of them are concrete tied arch bridges. During construction, components such as ties, concrete arch ribs and so on were prefabricated in the factory and then the site installation and splicing were carried out according to the certain procedure. Pre-stressing technologies were performed accordingly to form an internally statically-indeterminate and externally statically-determinate concrete tied arch structure.