过去,预制框架大柱施工时,由于下端头铁活不好固定,铁活常有不同程度的位移,给柱子吊装增加了很多困难。上、下柱子焊接时,要垫几块斜形铁板,增加了焊接工作量和吊车的占用时间,影响施工进度,浪费人力和材料。为此,我 In the past, when prefabricated large pillars were constructed, due to the poor fixation of the iron at the end of the prefabricated frame, iron movements often had different degrees of displacement, adding to the difficulty of lifting the columns. When welding the upper and lower columns, several diagonal iron plates are required to be added, which increases the welding workload and the time taken for the crane to affect the progress of the construction and waste manpower and materials. For this, I