期刊论文

Tu, G.-Y.(runner_mail@126.com)

中文

桥梁建设

1003-4722

2013

43

4

105-109

本校为第一且通讯机构

荆岳长江公路大桥主桥为跨径布置(100+298) m+816 m+(80+75+75) m的混合梁斜拉桥,主梁由扁平钢箱梁和分离式混凝土边箱梁组成,中跨钢箱梁合龙段长16.4 m,重305 t,采用2台桥面吊机抬吊施工。该桥中跨合龙采用半配切半顶推的施工方案,通过统计方法预测合龙温度为22 ℃,在此基础上考虑多种因素影响,精确计算合龙段无应力下料长度为16 454.4 mm,将合龙段在工厂精确匹配预制,设置牵引装置调整合龙口宽度,采用逐缝调整合龙缝宽度的方法进行合龙段位形调整,最终顺利实现中跨的高精度合龙。实践证明,采用该合龙施工技术能减轻对合龙温度的依赖,缩短合龙施工时间,提高合龙施工精度和质量。

The main bridge of Jingyue Changjiang River Highway Bridge is a hybrid girder cable-stayed bridge with span arrangement of (100+298) m+816 m+(80+75+75) m. The main girders of the bridge consist of the flat steel box girder and separated concrete edge box girders. The closure block for the steel box girder of the central span is 16.4 m in length and 305 t in weight, which was lifted and installed by two sets of the deck cranes. The construction scheme for the closure of the central span was that of partial cutting and partial pushing of the gird...