两孔 40m 半穿式栓焊钢桁梁的拖拉安装设计与施工

Design and Construction for Launching Two Spans of 40M Boltedand Welded Halfthrough Steel Truss Girders with Hauling Method

阐述两孔４０ｍ双线半穿式钢梁拖拉安装的设计和施工的主要技术措施。对导梁形式的选择、连接的处理、半穿式钢梁拖拉的稳定性、滑道反力分布的均匀性等问题作了探讨，并说明了钢梁施工的悬臂试验方法。

The principal technical measures adopted in the design and construction for launching two spans of 40m doubletrack bolted and welded halfthrough steel truss girders with hauling method are described. The issues concerning selection of launching nose, connection of the nose with the steel truss girder, stability of the girder during launching, uniform distribution of reaction force on the slipway are discussed, and the tests for cantilever of the girder during launching are narrated as well.