缅甸钦敦江大桥钢梁架设

Erection of Steel Truss of Chindwin River Bridge in Myanmar

缅甸钦敦江大桥为公铁两用的栓焊下承式钢桁梁桥 ,主跨 112 m。中国路桥公司负责该桥主桥上部结构设计、施工设计、上部结构施工指导和监理 ;缅方负责下部构造设计和上、下部结构施工。施工中当钢梁悬臂拼装 80 m时 ,利用吊索架挂索张拉 ,对钢梁施以一定的预拉索力 ,以减少钢梁控制部位杆件内力并利用了温差法成功地实现了钢梁纵移 ,全桥于 1999年

The Chindwin River Bridge is for the use of both highway and railway with superstructure of continuous steel trusses, and the main span is 112 m. China Road & Bridge Corporation had been assighed the design of the superstructure, the construction design and the supervision of the erection of the steel truss. The design of the substructure and construction of the superstructure had been done by Myanmar side. When the cantilever erection of the steel trussis reached 80 m, the cable of tower for the cable-stayed must be stretched so that the internal force of controling members of the steel truss should be decreased. The longitudinal movement of the steel truss had been done successfully by using of the difference in temperature. The bridge was completed and opened for traffic in September of 1999.