English：

The development of formwork supported steel scaffold in China has progressed from buckletype, bowl buckle type, door type to disc buckle type steel scaffold. For the prevalent disc buckle steelpipe formwork support frame, combined with industry standards, the test research including the joints andthe whole frame is carried out, scientifically solve the bearing capacity calculation and the reasonablelayout of the frame. On the basis of reasonable solution to the structure of the lower part of the formworksupport frame, in order to further improve the utilization efficiency of disc buckle steel pipe formworksupport frame, a scientific method is put forward to solve the primary and secondary rib of the formworksupported on the top support frame. Based on the investigation and comparison of the primary andsecondary rib of the tool⁃type formwork support frame at home and abroad, such as linear weight, sectionstiffness EI and other major performance indicators, Q355 steel special⁃shaped welded pipe primary andsecondary rib is designed, combined with the typical 400mm⁃thick roof of basement, it is calculated andanalyzed the reasonable distance between the vertical rods of the standard type disk buckle steel pipeformwork support frame is 1500mm×1800mm.