环形水平支撑平台上吊装钢结构技术

THE TECHNOLOGY OF HOISTING STEEL STRUCTURE ON A CIRCULAR PLATFORM WITH HORIZONTAL SUPPORTS

武汉绿地项目高636m,基坑深25.5m,有5道环形水平支撑,地下室钢结构施工包括6个型号为SC1的巨型钢柱、6个型号为SC2的巨型钢柱和3节剪力墙钢骨。在地下室钢结构施工阶段,使用1台M1280D进行吊装时,有4个SC1巨型钢柱用M1280D塔吊吊装不到,需要使用3 000kN履带吊在水平支撑平台上进行吊装。通过对工程有限元分析和合理地安装措施,避免了对环形水平支撑的加固并顺利进行吊装,为项目节约了成本。

The depth of the deep excavation for Wuhan Greenland Project （636 m） is 25.5 m, which has five passes of circular horizontal supports. The construction of basement steel structure contains six SC1 giant steel columns, six SC2 giant steel columns and three steel skeleton sections of shear wall, in construction stage of the basement steel structure, when using a M1280D hoist, four SC1 giant steel columns could not be hoisted, so a 3 000 kN crawler crane was used to do the hoisting on a horizontal support platform. Through the finite element analysis and reasonable installation measures for the project the reinforcement of circular horizontal support was avoided, which saved the cost for the proiect.