钢桥施工技术(一)

钢桥施工技术应包括下部结构施工、上部结构施工两部份,这里下部结构施工从略,上部结构施工指梁、拱圈、索等钢结构施工技术。总体讲在大跨度桥梁施工中,钢桥施工要比预应力钢筋混凝土桥轻盈和方便,这主要得利于构件轻,而构件轻又是高强度、高弹性模量所致。一、钢梁拱圈的施工一般对于梁,拱圈的施工可归纳为以下几种方法:a)支架法;b)顶推法(对于钢桥可为伸臂法、钓鱼法、浮运法);c)旋转法;d)悬臂法;e)大型设备施工法等诸方法

Steel Bridge Construction Technology (1)

Steel bridge construction technology should include substructure construction, superstructure construction of two parts, here substructure construction is omitted, superstructure construction refers to beams, arches, ropes and other steel structure construction technology. Overall in the construction of large-span bridges, steel bridge construction than prestressed reinforced concrete bridge light and convenient, which is mainly due to the lightweight components, and lightweight components and high strength, high modulus of elasticity due. First, the construction of steel girder arch ring general for beam, arch ring construction can be summarized as follows: a) bracket method; b) top push method (for steel bridges can be for the arm method, fishing method, floating method); c) rotary method; d) cantilever method; e) large-scale equipment construction method and so on.