港珠澳大桥承台墩身工厂化预制施工技术

发布时间：2018-02-23 18:21

本文关键词： 组合梁桥承台墩身不锈钢筋模板工程混凝土施工整体预制施工桥梁施工　出处：《桥梁建设》2014年02期 　论文类型：期刊论文

【摘要】：港珠澳大桥浅水区非通航孔桥采用浅埋式预制墩台结构,墩高19.143~42.974m,承台尺寸为15.6m×11.4m×4.5m;预制承台及其底节墩身最高18.5m,最重2 370t;墩身采用矩形空心墩结构;承台及墩身分别采用C45、C50混凝土。该桥承台、墩身采用整体预制施工,在自动化钢筋加工车间利用数控钢筋弯曲机加工钢筋,经验收合格后运输至场内指定位置进行钢筋绑扎、安装,承台钢筋绑扎后整体横移至预制台座上,墩身钢筋通过龙门吊机整体吊装插入承台钢筋,安装模板,进行承台、墩身的一次性整体浇筑,待混凝土达到设计强度后拆除模板,将承台、墩身横移至存放台座完成预制。目前,已完成32个桥墩的承台、墩身的工厂化预制施工,施工质量良好。
[Abstract]:In shallow water area of Hong Kong-Zhuhai-Macao Bridge, the shallow buried prefabricated pier abutment structure is adopted, the pier height is 19.143nb 42.974m, the cap size is 15.6m 脳 11.4m 脳 4.5m, the prefabricated cap and its bottom pier body are up to 18.5m, the maximum weight is 2370t, the pier body adopts rectangular hollow pier structure. The cap and pier are respectively made of C45C50 concrete. The cap of the bridge, the pier body is prefabricated as a whole, and the steel bar is machined by numerical control steel bar in the automation steel bar processing workshop. After acceptance and acceptance, the steel bar is bound to the designated position in the yard. The steel bar of the pier body is hoisted and inserted into the steel bar of the bearing cap through the integral hoisting of the gantry crane, and the formwork is installed to carry out the one-off integral pouring of the cap and pier body. When the concrete reaches the design strength, the formwork is removed, and the cap and pier are moved horizontally to the storage pedestal to complete the prefabrication. At present, 32 abutments of the bridge pier have been completed, and the factory prefabricated construction of the pier has been completed, and the construction quality is good.
【作者单位】：中铁大桥局集团第五工程有限公司;
【分类号】：U445.559

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