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Steel arch (ground support)

The frame with TH profile consists of several overlapping segments in the joints and these are tight. Their main advantage is that they can slide between them to avoid deformation if the load on the frame exceeds their capacity. They adapt better to the excavation hole thanks to their variable overlap in the joints with better loading. The frame made of TH profile allows convergences in the galleries without deforming and avoiding the exhaustion of the profile by sliding joints

 


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