[提要]  详细介绍了采用液压千斤顶进行新加坡MEGA汇展中心展览大厅巨型钢结构屋盖整体吊装的关键技术：用计算机双重控制吊点的位移和内力，自动调整吊点间的高差和吊点内力；采用机械锁和液压锁双保险措施使吊装平稳等。工程已于1999年3月竣工。
[关键词]  巨型钢屋盖 整体吊装 液压千斤顶

Singapore MEGA exhibition center which is completed in March 1999 is composed of 6 halls and auxil-
iary buildings. Main structure is 99m×96m large-span steel structure which is composed of 3 pieces of huge spatial trusses. The steel roof structure is assembled on the ground then lifted to the design level by hydraulic jacks.Detail methods of the whole body lifting of the steel structure roof are introduced. The advantage of hydraulic jack lifting is illustrated through the project.
Keywords: steel  roof; integral  hoisting; hydraulic jack