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铜陵有色建安公司施工的大通煤矿皮带走廊,共四跨。中间两跨较大,其跨度均为39.60m。皮带走廊的主要承重结构为钢桁架,断面尺寸为2.80×2.60m,桁架自重每跨为14.37t。钢桁架支承在钢柱或钢筋混凝土框架上,各跨均为简支。钢桁架的示意图如图1所示。设计吊点在钢桁架的两端。该皮带走廊位于山坡上,地面高差大,崎岖不平,重型机械难于发挥作用。若选用扒杆整体抬吊施工,因为钢桁架就位高度高,地形复杂,扒杆移动不便等原因,也有一定困难。因此决定利用钢管脚手管搭操作平台,分片
The Datong Coal Mine Belt Corridor constructed by Tongling Nonferrous Metals Construction Co., Ltd. has a total of four spans. The middle two spans are larger and their span is 39.60m. The main load-bearing structure of the belt corridor is a steel truss, with a section size of 2.80 x 2.60 m and a truss weight of 14.37 t per span. The steel trusses are supported on steel columns or reinforced concrete frames, each of which is simply supported. The schematic diagram of the steel truss is shown in Figure 1. Design hanging points on both ends of the steel truss. The belt corridor is located on the hillside. The ground level is high and uneven, and heavy machinery is difficult to play a role. If the whole mast lifting construction is selected, there are certain difficulties because of the high height of the steel truss in place, the complex terrain, and the inconvenient movement of the mast. Therefore, it was decided to use the steel pipe scaffolding platform and slicing