Steel arch support is a support measure to reinforce underground engineering after shaped steel is formed. The steel arch frame is processed on site and piled up in a centralized manner. The following should be provided with sleepers to prevent corrosion. The loader should be transported to the working face and manual mechanical installation should be conducted.
L, u, I shape steel and steel rail, steel pipe and other steel, processed into the required shape, with the whole installation or rod assembly method to strengthen the underground support measures. Steel arch support can be combined with bolt, shotcrete and steel mesh to form composite support.
Rigid steel arch support and flexible steel arch support have immediate strength and stiffness, which can control the excessive deformation of surrounding rock, but the cost is higher, and the precision of excavation section size is more strict. This method is often used in the construction of the surrounding rock with shallow burial, bias and very short self-stabilizing time, as well as loose, broken, water gusher and expansive rock and soil.
