大瑞铁路怒江特大桥钢桁拱多杆件合龙施工技术研究

Research on Construction Technology of Steel Truss Arch Multi-rod Closure in Nujiang Grand Bridge of Darui Railway

大瑞铁路怒江特大桥钢桁拱多杆件合龙受温度、索力偏差影响,合龙施工调整难度大,精度难以保证。文章以怒江特大桥为背景,为实现钢桁拱的精确合龙,对合龙关键施工技术进行研究,对合龙段进行精确测量,保证了合龙段的合龙精度。

The steel truss arch multi-rod closure in Nujiang Grand Bridge of Darui Railway is affected by temperature and cable force deviation,so it is difficult to adjust the closure construction and ensure the accuracy.The paper takes Nujiang Grand Bridge as the background,studieskey construction technology of the closure,measures the closure sectionaccurately and ensures the closure accuracy in order to achievethe accurate closure of the steel truss arch.