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在吊装施工作业中,对于一些异形构件,为了使构件在起吊时平稳,就位操作时顺利、安全,避免出现扭转、歪斜、倾翻等现象,在作业前必须正确确定构件的重心位置,并使吊点(当多吊点起吊构件时,应使用吊索的合力位置)处在构件重心的铅直线上。图1为某锯齿形厂房屋面大梁的起吊示意图,图2为门式刚架吊装示意图,图3a 为因吊点位置设置不正确,造成吊装时构件扭转的示意图,正确吊装示意如图3b 所示。对
In the hoisting construction work, for some shaped parts, in order to make the parts stable during lifting, the operation in place is smooth and safe, avoiding the phenomena of torsion, skew, tipping and so on. The position of the center of gravity of the component must be correctly determined before the operation Make the hanging point (when lifting components, you should use the force of the sling position) in the member of the vertical line of the center of gravity. Figure 1 is a zigzag-shaped plant roof girder lifting schematic diagram, Figure 2 is a gantry crane hoisting schematic diagram, Figure 3a is due to lifting point position is not set correctly, resulting in lifting the schematic diagram of the member twisting, the correct lifting shown in Figure 3b . Correct