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工业厂房大跨度钢筋混凝土屋架(24～30米)由水平状态扶直、吊装是厂房整个施工过程中的重要环节,稍有不慎就会造成屋架折断、摔坏,使工程受到损失,推迟施工工期,因此受到设计、施工单位普遍重视。但目前各种大跨度钢筋混凝土屋架设计图集对屋架的扶直、吊装一般均采用≥五点吊法(即用钢丝绳绑于屋架上弦≥五个节点扶直、吊装)见图1。这种吊法施工单位普遍反映感到顺琐,其原因是:(1)吊点数目多,使钢丝绳和滑轮组安装困难,受力不易平衡均匀;(2)需要吊装横梁等专用设备;(3)钢丝绳、滑轮组、横梁等吊装工具占用空间高度多,要求起吊机械的臂长很高,有时不易满足,给施工造成困
Long-span reinforced concrete truss (24 ~ 30m) in industrial buildings is straightened from horizontal state. Lifting is an important part of the whole construction process of the plant. Slight trivial carelessness will cause breakage and breakage of the roof truss, causing construction losses and postponing construction Construction period, so by the design, construction units generally attach importance. However, at present, all kinds of long-span reinforced concrete roof truss design atlas straightening, lifting are generally used ≥ 5:00 hanging law (that is, tied with steel ropes on the roof truss ≥ five nodes straighten, hoisting) shown in Figure 1. This hanging method generally reflects the construction unit Shun Suo, the reasons are: (1) the number of hanging points, the rope and pulley block installation difficulties, the force is not easy to balance evenly; (2) need to hoist beams and other special equipment; (3) Rope, pulley block, beam and other lifting tools occupy a high degree of space, requiring lifting arm length is very high, and sometimes difficult to meet, to the construction caused by the storm