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一、工程概况北京首钢公司新扩建的特钢二炼电炉主厂房工程,其结构排架柱与旧配电控制楼承重墙体间距仅为5cm,新旧基础上下重叠,新杯基伸入旧楼条基下达2.1m。新建厂房主跨21m,排架结构,钢桁梁,大型屋面板体系。地基条件为:上层回填土1.8m,下层为砂夹卵石。旧配电控制楼为两层砖混结构。在新厂房施工中,为了不停
I. Project Overview The newly expanded special steel plant for the No. 2 Smelting Furnace of Beijing Shougang Company has a spacing of only 5cm between the structural frame columns and the wall of the old distribution control building. The old and new foundations overlap, and the new glass base extends into the old building. The base is issued at 2.1m. The main building of the new plant is 21m long, with a truss structure, steel trusses, and a large roof plate system. The ground conditions are: the upper backfill is 1.8m, and the lower layer is sand-clad pebbles. The old distribution control building is a two-story brick-concrete structure. In the construction of the new plant, in order not to stop