拱桥在我国大跨径桥梁中,占有很重要的地位,主要是箱形拱。其施工方法多数采用塔架扣挂法,把拱圈分成三段或五段预制,然后吊装合拢。自然也有其它方法,例如四川的转体法,浙江的悬臂桁架法及辽宁的半刚性骨架锚索假载法等。但目前仍以三、五段吊装的塔架扣挂法为主。这种方法的优点是拱肋合拢快;段与段之间的螺栓接头便于控制及调整拱轴线。但也存 Arch bridge in our country’s long-span bridge, occupy a very important position, mainly box arch. Most of its construction methods using tower buckle hanging method, the arch ring is divided into three sections or five prefabricated, and then hoisting together. Naturally, there are other methods, such as the swivel method in Sichuan, the cantilever truss method in Zhejiang Province, and the semi-rigid skeleton anchor rope method in Liaoning. However, there are still three-fifths of tower crane hanging hanging law based. The advantage of this method is that the arch ribs are close together; the bolted joints between the segments facilitate the control and adjustment of the arch axis. But also save