大吨位箱梁单点顶推技术探讨

Discussion on Single Point of Pushing Method for Large Tonnage Box Girder

顶推法是顶推桥梁施工工法中常用的施工方法,但大吨位箱梁单点顶推施工国内较为少见。通过长沙湘府路湘江大桥跨京广铁路联主跨箱梁顶推施工实践,较为详细地总结了大吨位箱梁顶推施工中临时墩布置、滑道设置、纠偏限位控制、导梁安装及后锚点等结构体系的设置要点与施工过程中关键工序的控制要点。

Incremental launching method is commonly used in bridge construction, but large bridge incremental launching method is rarely seen at home. Through the practice of the Xiangjiang River Bridge construction, the author gives a detailed summary of the girder structure, slideway design, deviation control, launching guide beam as well as the anchoring point design in incremental launching construction together with the control point of the key procedure.