The overall lifting technology of the super large space frame of the double-machine hangar

The double-seat hangar of Eastern Airlines has a horizontal span of 15m, a longitudinal depth of 9m, and a total area of ​​14728m2, which is equivalent to two standard football fields and can perform repairs and maintenance of two large passenger aircrafts at the same time. There are 32 reinforced concrete upper columns in the hangar, which are distributed in a concave shape. The column on the A-axis is a rectangular column with a section of 4mX2m, a wall thickness of .4m, and a height of 25m, and the others are combined columns with four limbs with a height of 29m. The limbs of the two combined columns are connected by concrete beams with a height of 7cm and a width of 25cm. The center distance between the connecting beams is generally 3m. Since there are no columns in the 15m span of the gate, the load on the four columns at the A and B axis amounts to two-thirds of the total weight of the space frame. 

The hangar roof steel structure space frame is made up of 210,000 sets of M223I24 torsion shear type and M3 large hexagon head high-strength bolts connecting more than one type of rods. The weight of the lifting space frame is 32t. Chapter 1 The lifting scheme is indeed leaking and the composition of the lifting system. At present, the commonly used roof space frame installation methods in China are: high-altitude bulk installation, strip and block installation, high-altitude sliding, and overall hoisting. In view of the project status and the characteristics of the space frame frame, we decided to adopt “steel strand suspension load-bearing, computer synchronization control, hydraulic jack cluster overall lifting, and the process to carry out the overall continuous lifting of the space frame. The English method is to install hydraulic jacks in the permanent Structurally, the upper end of the suspended steel strand is fixed to the hydraulic jack, and the lower end is connected with the lifting object with an anchor. The hydraulic jack clamps the steel strand and lifts it up, as if water is lifted from the well to lift the lifting object to the installation height.

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