河北航空基地维修机库工程网架拔杆提升施工技术

石家庄河北航空基地维修机库大厅屋面为3层斜放四棱锥全焊接球网架结构,结合现场实际情况及工程特点,选用“杆件地面组装,分段整体提升”的安装方案.施工前,对网架提升设计中拔杆的选择、稳定性及网架提升吊点布置等关键技术使用专业软件建模进行精确验算分析,施工过程中对网架单元拼装及提升过程中的人员配备、拔杆安装、起吊、同步控制等重要环节进行有效管控.经实际监测,该钢网架变形均在允许范围之内,满足设计要求.

LIFTING CONSTRUCTION TECHNOLOGY OF PULLING BAR FOR GRID FRAME OF MAINTENANCE HANGAR IN HEBEI AVIATION BASE

The lobby roof of Shijiazhuang Hehei Aviation Base Maintenance Hangar is a three layer and quadrangular pyramid all welded ball grid structure. Combined with engineering characteristics and on site actual situations, the installalion program of ＂assembling members on the ground, integral lifting by segment＂ was used. By taking advantage of professional computer software, the modeling was used to make accurate calculation and analysis of key technologies including selection and stability of pulling bar and suspending point arrangement of grid structure lifting. Moreover, during construction, it was effectively controlled important links of the process of grid structure＇s unit assembly and lifting, including personnel allocation, pulling bar installation, lifting and synchronous control. The deformation of steel grid frame could meet the requirement of design according to the monitoring resuhs.