Steel supports are widely used in subways. They are used as connecting components. They are used in subways to prevent collapse in caves and block the soil wall of caves. Of course, the steel support components used in the subway are indispensable products, so the steel support is the applicable scope of use in the subway foundation pit. The shapes of steel supports are mainly herringbone and cross shapes. The new situation of steel support is that the rebound of steel prices is blocked. In the short term, there is no hope for the rebound of steel prices. Most steel companies have broken down or made profits. If the enthusiasm of steel mills is stimulated to rise again, domestic steel prices may still fall further. Therefore, there are many fraudulent phenomena in the current steel supports, which are prone to safety accidents during construction. Even if you buy high-quality steel supports, the technical requirements for disassembly and assembly are still strictly required. The following is part of the explanation.
1. In order to prevent structural cracking, the steel support must be removed after the corresponding structural concrete reaches 70% of the design strength.
2. Use a crane to lift the steel support, set a 100T jack at the movable end, apply axial force until the steel wedge is loose, take out the steel wedge, unload it step by step until the steel wedge is taken out, and then hang down the support.
3. Manually cooperate with crane to remove.
Post time: Feb-14-2022