Abstract:

In order to solve the problems of low manual welding efficiency, substantial personnel input and unstable processing quality of the plane mesh of the shield tunnel segment, the FGZH-3 Project of Foshan-Dongguan Inter-city is selected to form the plane mesh of the segment steel cage. The design and optimization of the module′s automatic positioning and forming, horizontal beam automatic blanking and welding device, plane mesh bending and welding device, automatic control system are carried out. The problems of plane mesh bending and welding stress concentration, joint alignment and unstable welding quality are solved through the introduction of plane mesh forming device, internal and external arc bending correction mold and other institutions. The mechanization and automation of the plane mesh of the segment steel cage from the blanking of the steel to the one-time forming are realized, which ensures the stable processing quality of the plane mesh and reduces the labor intensity of workers. The study results can provide guiding significance for promoting the research & development and upgrade of automatic processing equipment for segment steel cages.

Key words: shield tunnel, segment, steel cage′s plane mesh, automatic positioning, welding apparatus