确保大型钢结构框架吊装垂直度的分析计算方法

Analysis and calculation method to ensure perpendicularity of large steel structure frame in hoisting operation

大型钢结构框架模块化吊装,既减少了高空作业工作量,又降低了施工成本,是当今石油化工等工程常采用的施工方法。整体或分段的大型钢结构框架吊装就位时,重心一般不会与几何中心重叠,偏载荷常导致框架就位时垂直度产生偏差。以某石化公司80万t/a连续重整装置中反应器框架的吊装为例,通过对框架竖立后的垂直度分析计算,并根据该计算结果采取了相应措施,解决了垂直度偏差问题,可为类似吊装的计算校核提供理论参考。

Modularized hoisting of large steel structure frame not only reduces the workload of aerial work,but also reduces the cost of construction. It is a common construction method used in today＇s petroleum and chemical engineering. When the whole or segmented large-scale steel frame is hoisted,the center of gravity will not overlap with the geometric center. The eccentric load often causes the perpendicularity deviation when the frame is in place. In this paper,the reactor frame of the 800 kt/a continuous reforming unit in a petrochemical company is taken for example to perform the analysis and calculation of the perpendicularity of the frame after erection; And according to the calculation results, measures are taken to solve the problem of perpendicularity deviation, which provides theoretical reference for the calculation and checking of similar hoisting operations.