150m跨径中承式提篮钢拱桥浮拖施工分析

Analysis of Floating and Hauling Construction of 150-m Span Half-Through Basket Handle Steel Arch Bridge

基于150m跨径的清江石化钢拱桥,介绍浮拖施工技术在大跨径中承式提篮钢拱桥施工中的应用,分析大跨钢拱桥整体浮拖施工的要点和难点。针对本桥浮拖施工需要进行多个体系转换的特点,应用空间有限元分析程序,进行了关键施工阶段的受力分析,研究了浮拖施工阶段钢拱桥的稳定性。

With reference to the erection of the 150-m span Qingjiang Shihua Steel Arch Bridge, this paper introduces the application of floating and hauling construction technique to the erection of long span half-through basket handle steel arch bridges, and analyzes the key points and difficulties of the erection of monolithic steel arch blocks of the type of the bridges with the technique. Further in the light of the characteristics that several structural systems of the Qingjiang Shihua Bridge have to be transformed in the floating and hauling construction, the pa- per conducts the analysis of force conditions of the Bridge at its critical construction stages and also study of stability of the Bridge during the floating and hauling construction by means of spatial finite element program.