Tunnel roof support is to point to in the tunnel projects such as highway tunnel engineering, railway tunnel engineering, military take cover engineering, mining, coal, iron ore and so on the roadway, and other projects in the construction of hydropower station diversion hole is used for supporting body piercing or bunker used by steel support, tunnel roof support is usually based on the certain radian and the length of production, make into small units, and then in the construction site installation, before anchor installation, connection steel welding, steel mesh welding, finally carries on the shotcrete rockbolt support early in the end of the tunnel construction.
The material of the tunnel roof support is divided into h-shaped steel arch frame, i-shaped steel arch frame, channel steel arch frame, miner's steel support frame and u-shaped steel support frame. Miners' steel support and u-shaped steel support are generally used in support of roadway such as coal mine, and they are also made of i-beam in coal mine, but very few. Channel steel arch is generally used in small tunnels and is rarely used. In the production process, some made with finished steel section, some with steel plate blanking welding into steel section, such as H section steel, I steel, in which H section steel ratio is larger than I steel, steel arch for the surrounding rock higher level place.
Tunnel roof support with cold bending machine is typically made into arc cold bending, can also use pull bending machine, you can also use the top bending machine, all kinds of machinery and equipment have their own characteristics, including processing radius, arc fluency, arc accuracy, and control of the distortion and deformation of the steel processed, processing speed, equipment processing capacity, equipment prices vary, such as user according to the actual material selection design of arch of the corresponding equipment.
