摘要
Abstract
Main bridge of Zongcun bridge is a through long-span steel-box basket arch bridge,crossing the Wushen Canal,which has been widened into a Ⅲ inland waterway.Taking the construction of main bridge of Zongcun Bridge as an example,a large segment hoisting scheme with few supports is analysed.This paper studies the alignment control theory and method for the long-span steel-box basket arch bridge.For the key stages during construction,finite element software Midas Civil is used for modeling and analysis,and the alignment and pre-camber setting of the bridge are calculated.Based on the in-situ monitoring,the monitoring values are compared with design values to ensure the correct design alignment.The new in-situ construction alignment monitoring technology proposed in this paper pre-positions monitoring devices and includes temporary support monitoring.It innovatively selects long-life points,and proposes a fast installation and positioning innovative device.Thus,smooth bridge alignment is ensured,meeting design requirements and aesthetic appearance.关键词
桥梁工程/提篮拱/钢箱梁/施工监控/有限元分析/线形控制Key words
bridge engineering/handle-basket arch/steel-box girder/construction monitoring/finite element analysis/alignment control分类
交通工程
