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民主德国铁路许多钢桥已使用60至100多年,锈蚀严重,改造为电力牵引后,相当数量的桥梁必须改建,以适应更高的行车速度、更大的轴重和净空限界。 1985年民主德国铁路在改建德累斯顿总站附近的兴纳——德累斯顿2孔4线桥时大规模地试用了液压移动技术拆除边梁,又用同样的方法成功地安装了型钢混凝土预制梁。桥梁上部建筑更换过程如下:先修建2个移动架、准备好液压移动设备(该设备由气垫滑移器、蓄电池、滑板和液压机组构成)、2台装拆移动架的汽车吊和铺轨及安装支承台的EDK 300W型道岔安装吊机。封锁线路后,把钢梁从支承上松开,撤去摇轴支座,接着把放置在气垫上的移动架顺着钢滑板作水平移动到梁下。再利用液压移动设备把钢梁抬出支座
Many steel bridges of the Democratic German Railways have been used for more than 60 to 100 years, and have been seriously corroded and transformed into electric traction after which a considerable number of bridges have to be rebuilt to accommodate higher traffic speeds, greater shaft weight and headroom. The democratization of the German railroad in 1985 in a large-scale trial of hydraulic displacement technology removed the side girders while reconstructing the two-lane, 4-lane 4-axle Höfn-Dresden, near Dresden’s terminus, and successfully installed sections in the same way Prefabricated concrete beams. The construction of the upper part of the bridge is as follows: First, construct two mobile stands, prepare the hydraulic mobile equipment (consisting of air cushion skid, battery, skateboard and hydraulic unit), two crane and derailing and installation Support platform EDK 300W type switch installed crane. After the line is closed, the steel beam is released from the support, the rocking shaft support is removed, and then the moving frame placed on the air cushion is moved horizontally along the steel slide to the beam. Re-use of hydraulic mobile equipment to lift the steel beam from the support