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铁道部战备办公室《铁道知识》编辑部合办 安员桥位于河内至友谊关铁路Kg+750处,系公铁(米轨)两用桥梁,全长227.412米,由4孔44.65米、1孔48.812米穿式钢衍梁组成;桥高20米,石砌墩台。桥梁跨越登河,桥址处河床为软粘土,河流水深15至20米,受潮汐影响涨落差1米,流速1.5米/秒。 该桥1967年曾遭美机空袭破坏,5号墩身沿沉井顶面倒塌,沉井略有倾斜,井壁一侧被炸坏,缺口高2.5米,缺口以下基础完好,第4、5两孔44.65米钢桁梁落水。当时,担负抢修任务的中国志愿工程队一支队组织人员展开技术侦察.制定了抢修方案:浮、拖第4、5孔钢梁出桥位,用混凝土接高修复炸断的5号残墩,第4孔钢梁修复利用,第5孔以双层六四式军用粱修复。 第4孔钢行梁长44.65米、宽5米、高5.5米,不含桥面重约135吨。根据现场情况和队伍技术装备确定采用浮运法架设。抢修实施情况如下:
Railways Ministry of Railways combat readiness office “Railroad Knowledge” editorial department Co-organized security staff bridge is located in Hanoi to Youyi Guan Railway Kg +750, Department of Railways (Meilan) dual-use bridge, a total length of 227.412 meters, 44.65 meters from 4 holes, 1 hole 48.812 m wear steel beam Yan composition; 20 meters high bridge, pier pier stone. Bridge across the Denghe, the bridge site at the soft clay bed, the river depth of 15 to 20 meters, the impact of tidal changes by 1 meters, the flow rate of 1.5 m / s. The bridge was destroyed by the U.S. plane attack in 1967. Block 5 collapsed along the top of the caisson and the caisson was slightly inclined. The side of the wall was broken and the gap was 2.5 meters high. The foundation under the gap was intact, Two holes 44.65 meters steel truss fell into the water. At that time, a task force responsible for repairing the task of a team of volunteers to organize technical reconnaissance.Development of the program: Float, drag hole 4,5 steel girder out of the bridge position, with high concrete repair access to the No. 5 residual pier, The fourth hole steel beam repair use, the fifth hole to double 64 military beam repair. The fourth hole steel beam length 44.65 meters, 5 meters wide, 5.5 meters high, excluding bridge decks about 135 tons. According to the scene and team technical equipment to determine the use of floating method erection. Repair implementation as follows: